Long-term weather trends in Penang: 30-day, 3-month and 12-month forecasts
Weather trend
Based on 18 years of archives
Calculated on 3 September 2026
Find long-term weather in Penang, Malaysia, with a 30-day trend, for the next 3 months and month-by-month over 12 months, calculated from 18 years of weather archives.
30-day weather forecast in Penang, Malaysia
This summary helps quickly identify the major weather trends for the coming month in Penang, Malaysia, before checking the day-by-day calendar below.
Average temperature
28.0°C
Likely rainy days / week
6.0 days
Dominant weather type
rainy
60%
To remember
The expected temperature remains close to the normals, around 28.0°C on average. The rain looks close to usual levels, with about 6.0 rainy days per week. The dominant scenario remains rainy, with about 60% recurrence and a average confidence.
These long-term predictions are calculated from 18 years of observed weather in Penang. They allow identification of probable trends derived from historical data, and are not short-term weather forecasts.
30-day weather calendar in Penang, day by day
For each date, find a likely temperature range, a risk of rain, and the most frequent weather type.
| Date | Temperatures | Rain | Dominant weather | History |
|---|---|---|---|---|
|
September 30, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
83%
If rain:
moderate
|
rainy
54%
|
|
|
October 1, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
83%
If rain:
moderate
|
rainy
54%
|
|
|
October 2, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
83%
If rain:
moderate
|
rainy
54%
|
|
|
October 3, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
83%
If rain:
moderate
|
rainy
55%
|
|
|
October 4, 2026
|
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
83%
If rain:
moderate
|
rainy
55%
|
|
|
October 5, 2026
|
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
83%
If rain:
moderate
|
rainy
56%
|
|
|
October 6, 2026
|
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
83%
If rain:
moderate
|
rainy
57%
|
|
|
October 7, 2026
|
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
84%
If rain:
moderate
|
rainy
58%
|
|
|
October 8, 2026
|
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
85%
If rain:
moderate
|
rainy
60%
|
|
|
October 9, 2026
|
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
86%
If rain:
moderate
|
rainy
61%
|
|
|
October 10, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
86%
If rain:
moderate
|
rainy
62%
|
|
|
October 11, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
87%
If rain:
moderate
|
rainy
63%
|
|
|
October 12, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
87%
If rain:
moderate
|
rainy
64%
|
|
|
October 13, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
87%
If rain:
moderate
|
rainy
65%
|
|
|
October 14, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
87%
If rain:
moderate
|
rainy
64%
|
|
|
October 15, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
86%
If rain:
moderate
|
rainy
64%
|
|
|
October 16, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
86%
If rain:
moderate
|
rainy
63%
|
|
|
October 17, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
85%
If rain:
moderate
|
rainy
63%
|
|
|
October 18, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
28.8°C
|
Risk of rain
84%
If rain:
moderate
|
rainy
62%
|
|
|
October 19, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
84%
If rain:
moderate
|
rainy
61%
|
|
|
October 20, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
84%
If rain:
moderate
|
rainy
61%
|
|
|
October 21, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
84%
If rain:
moderate
|
rainy
61%
|
|
|
October 22, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
84%
If rain:
moderate
|
rainy
61%
|
|
|
October 23, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
85%
If rain:
moderate
|
rainy
61%
|
|
|
October 24, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
86%
If rain:
moderate
|
rainy
61%
|
|
|
October 25, 2026
|
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
|
Risk of rain
87%
If rain:
moderate
|
rainy
61%
|
|
|
October 26, 2026
|
26°C /
30°C
Likely temperature:
27.5°C -
28.8°C
|
Risk of rain
89%
If rain:
moderate
|
rainy
61%
|
|
|
October 27, 2026
|
26°C /
30°C
Likely temperature:
27.5°C -
28.8°C
|
Risk of rain
90%
If rain:
moderate
|
rainy
61%
|
|
|
October 28, 2026
|
26°C /
30°C
Likely temperature:
27.5°C -
28.8°C
|
Risk of rain
90%
If rain:
moderate
|
rainy
61%
|
|
|
October 29, 2026
|
26°C /
30°C
Likely temperature:
27.5°C -
28.8°C
|
Risk of rain
91%
If rain:
moderate
|
rainy
61%
|
September 30, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
83%
If rain:
moderate
Dominant weather
rainy
54%
October 1, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
83%
If rain:
moderate
Dominant weather
rainy
54%
October 2, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
83%
If rain:
moderate
Dominant weather
rainy
54%
October 3, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
83%
If rain:
moderate
Dominant weather
rainy
55%
October 4, 2026
Temperatures
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
83%
If rain:
moderate
Dominant weather
rainy
55%
October 5, 2026
Temperatures
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
83%
If rain:
moderate
Dominant weather
rainy
56%
October 6, 2026
Temperatures
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
83%
If rain:
moderate
Dominant weather
rainy
57%
October 7, 2026
Temperatures
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
84%
If rain:
moderate
Dominant weather
rainy
58%
October 8, 2026
Temperatures
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
85%
If rain:
moderate
Dominant weather
rainy
60%
October 9, 2026
Temperatures
26°C /
29°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
86%
If rain:
moderate
Dominant weather
rainy
61%
October 10, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
86%
If rain:
moderate
Dominant weather
rainy
62%
October 11, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
87%
If rain:
moderate
Dominant weather
rainy
63%
October 12, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
87%
If rain:
moderate
Dominant weather
rainy
64%
October 13, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
87%
If rain:
moderate
Dominant weather
rainy
65%
October 14, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
87%
If rain:
moderate
Dominant weather
rainy
64%
October 15, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
86%
If rain:
moderate
Dominant weather
rainy
64%
October 16, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
86%
If rain:
moderate
Dominant weather
rainy
63%
October 17, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
85%
If rain:
moderate
Dominant weather
rainy
63%
October 18, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
28.8°C
Rain
Risk of rain
84%
If rain:
moderate
Dominant weather
rainy
62%
October 19, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
84%
If rain:
moderate
Dominant weather
rainy
61%
October 20, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
84%
If rain:
moderate
Dominant weather
rainy
61%
October 21, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
84%
If rain:
moderate
Dominant weather
rainy
61%
October 22, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
84%
If rain:
moderate
Dominant weather
rainy
61%
October 23, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
85%
If rain:
moderate
Dominant weather
rainy
61%
October 24, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
86%
If rain:
moderate
Dominant weather
rainy
61%
October 25, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.3°C -
29.0°C
Rain
Risk of rain
87%
If rain:
moderate
Dominant weather
rainy
61%
October 26, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.5°C -
28.8°C
Rain
Risk of rain
89%
If rain:
moderate
Dominant weather
rainy
61%
October 27, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.5°C -
28.8°C
Rain
Risk of rain
90%
If rain:
moderate
Dominant weather
rainy
61%
October 28, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.5°C -
28.8°C
Rain
Risk of rain
90%
If rain:
moderate
Dominant weather
rainy
61%
October 29, 2026
Temperatures
26°C /
30°C
Likely temperature:
27.5°C -
28.8°C
Rain
Risk of rain
91%
If rain:
moderate
Dominant weather
rainy
61%
This 30-day weather forecast in Penang allows you to quickly identify the mildest, wettest, or most changeable stretches in the coming month.
Week-by-week weather trend in Penang over 10 weeks
The maps below follow the actual calendar weeks, from Monday to Sunday, to identify the most favorable periods in the coming weeks in Penang.
Week 40
28 September - 4 October 2026
rainy
55%
clearings
24%
sunny
19%
Likely temperature
26°C / 30°C
Probable rain
5.8 days -
64 mm
Week 41
5 - 11 October 2026
rainy
60%
clearings
21%
sunny
17%
Likely temperature
26°C / 30°C
Probable rain
5.9 days -
71 mm
Week 42
12 - 18 October 2026
rainy
64%
clearings
19%
sunny
16%
Likely temperature
26°C / 30°C
Probable rain
6.0 days -
65 mm
Week 43
19 - 25 October 2026
rainy
61%
sunny
19%
clearings
17%
Likely temperature
26°C / 30°C
Probable rain
5.9 days -
63 mm
Week 44
26 October - 1 November 2026
rainy
61%
clearings
21%
sunny
15%
Likely temperature
26°C / 30°C
Probable rain
6.3 days -
67 mm
Week 45
2 - 8 November 2026
rainy
64%
clearings
24%
sunny
11%
Likely temperature
26°C / 29°C
Probable rain
6.4 days -
78 mm
Week 46
9 - 15 November 2026
rainy
59%
clearings
25%
sunny
14%
Likely temperature
26°C / 29°C
Probable rain
6.1 days -
72 mm
Week 47
16 - 22 November 2026
rainy
55%
clearings
25%
sunny
16%
Likely temperature
26°C / 29°C
Probable rain
6.3 days -
74 mm
Week 48
23 - 29 November 2026
rainy
54%
clearings
24%
sunny
17%
cloudy
6%
Likely temperature
25°C / 29°C
Probable rain
6.4 days -
80 mm
Week 49
30 November - 6 December 2026
rainy
40%
clearings
27%
sunny
27%
cloudy
5%
Likely temperature
25°C / 29°C
Probable rain
5.9 days -
63 mm
3-month weather trend in Penang
Temperatures, rain, sunshine and prevailing weather for the coming month and the following two months in Penang, Malaysia.
September 2026
rainy
52%
clearings
28%
sunny
16%
Likely temperature
26°C / 30°C
Average temperature
28.3°C
Probable rain
265 mm
Rainy days
27 days
Average sun/day
10.8 h
Average wind
12 km/h
Average humidity
82%
Cloud cover
41%
October 2026
rainy
60%
clearings
20%
sunny
18%
Likely temperature
26°C / 30°C
Average temperature
28.2°C
Probable rain
259 mm
Rainy days
28 days
Average sun/day
10.7 h
Average wind
12 km/h
Average humidity
83%
Cloud cover
41%
November 2026
rainy
58%
clearings
24%
sunny
15%
Likely temperature
26°C / 29°C
Average temperature
27.9°C
Probable rain
327 mm
Rainy days
28 days
Average sun/day
10.4 h
Average wind
11 km/h
Average humidity
85%
Cloud cover
44%
This 3-month weather trend in Penang helps anticipate the next month and the two following for a stay, a departure, or seasonal planning.
Month-by-month weather forecast in Penang over 12 months
Easily compare over 1 year the likely weather for each upcoming month in Penang, Malaysia to choose the best time based on heat, rain, or sunshine.
September 2026
rainy
52%
clearings
28%
sunny
16%
26°C
30°C
265 mm
27 days
average confidence
October 2026
rainy
60%
clearings
20%
sunny
18%
26°C
30°C
259 mm
28 days
average confidence
November 2026
rainy
58%
clearings
24%
sunny
15%
26°C
29°C
327 mm
28 days
average confidence
December 2026
rainy
34%
sunny
31%
clearings
30%
cloudy
5%
25°C
29°C
151 mm
24 days
average confidence
January 2027
sunny
42%
clearings
28%
rainy
27%
25°C
29°C
142 mm
18 days
average confidence
February 2027
sunny
54%
clearings
23%
rainy
22%
25°C
30°C
75 mm
13 days
average confidence
March 2027
sunny
48%
rainy
31%
clearings
19%
26°C
30°C
147 mm
22 days
average confidence
April 2027
rainy
47%
sunny
32%
clearings
18%
27°C
30°C
288 mm
27 days
average confidence
May 2027
rainy
50%
sunny
24%
clearings
22%
27°C
30°C
250 mm
27 days
average confidence
June 2027
rainy
38%
sunny
31%
clearings
27%
27°C
30°C
145 mm
22 days
limited trust
July 2027
rainy
39%
sunny
30%
clearings
29%
26°C
30°C
181 mm
23 days
average confidence
August 2027
rainy
47%
sunny
27%
clearings
21%
26°C
30°C
202 mm
25 days
average confidence
This 12-month weather calendar in Penang makes it easy to compare the warmest, driest, or sunniest periods.
Compare these forecasts with the weather archives of Penang
To go further, consult the city's detailed weather archives and the available years to compare these trends with past observations.
Long-term weather forecast around of Penang
Find the towns near of Penang on the map and compare their long-term weather forecasts to choose the most favorable area.
Long-term weather forecast calculation method in Penang
These long-term weather trends in Penang are estimated from 18 years of observed weather. They are mainly useful for identifying the most favorable periods and do not replace short-term weather forecasts.
Number of years of history
18
Comparison window
target day +/- 7 days
Update
daily
Output type
weather trend based on history
How are these trends calculated
Same period, year after year
For each future day, we look at the comparable dates observed over 18 years, with a rolling window of 15 days around the target day.
More weight to recent years
The most recent years are weighted slightly more to better reflect recent changes in weather conditions.
How to read the prevailing weather
The prevailing weather corresponds to the most frequent weather scenario over the displayed period. The percentage indicates its estimated share, and the other weather types shown in smaller size display the possible secondary scenarios, especially useful in weekly or monthly forecasts.
Months are calculated separately
Monthly trends are calculated directly from historical months to avoid artificial daily accumulations.
How to read confidence levels
The confidence score summarizes how much the model runs converge on a stable weather scenario for the displayed period.
high confidence
70 to 100
Past years tell a fairly coherent story: temperatures, rainfall and weather type vary little around the dominant scenario.
average confidence
45 to 69
A clear trend exists, but with greater year-to-year variations. The result should be read as a probable direction.
limited trust
0 to 44
The archives are more scattered over this period. The displayed scenario remains useful as a reference, but it should be interpreted with caution.
In practice, confidence is generally more robust over months than over weeks, because longer periods smooth out weather variability more.
Limits to keep in mind
- This is a long-term trend based on historical data, not an operational weather forecast for a few days.
- Exceptional or very localized episodes may deviate significantly from the most likely scenario.
- Monthly trends are generally more reliable for choosing a period, while day-by-day detail is mainly used to refine pinpointing.