Long-term weather trends in Waialua: 30-day, 3-month and 12-month forecasts
Weather trend
Based on 18 years of archives
Calculated on 6 September 2026
Find long-term weather in Waialua, Hawaii, 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 Waialua, Hawaii
This summary helps quickly identify the major weather trends for the coming month in Waialua, Hawaii, before checking the day-by-day calendar below.
Average temperature
26.5°C
Likely rainy days / week
2.1 days
Dominant weather type
sunny
42%
To remember
The expected temperature remains close to the normals, around 26.5°C on average. The rain looks close to usual levels, with about 2.1 rainy days per week. The dominant scenario remains sunny, with about 42% recurrence and a high confidence.
These long-term predictions are calculated from 18 years of observed weather in Waialua. They allow identification of probable trends derived from historical data, and are not short-term weather forecasts.
30-day weather calendar in Waialua, 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
|
25°C /
28°C
Likely temperature:
26.3°C -
27.3°C
|
Risk of rain
35%
If rain:
weak
|
sunny
40%
|
|
|
October 1, 2026
|
25°C /
28°C
Likely temperature:
26.3°C -
27.3°C
|
Risk of rain
34%
If rain:
weak
|
sunny
39%
|
|
|
October 2, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
|
Risk of rain
33%
If rain:
weak
|
sunny
39%
|
|
|
October 3, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
|
Risk of rain
32%
If rain:
weak
|
sunny
39%
|
|
|
October 4, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
|
Risk of rain
31%
If rain:
weak
|
sunny
39%
|
|
|
October 5, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
|
Risk of rain
31%
If rain:
weak
|
sunny
39%
|
|
|
October 6, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
|
Risk of rain
31%
If rain:
weak
|
sunny
39%
|
|
|
October 7, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
|
Risk of rain
30%
If rain:
weak
|
sunny
39%
|
|
|
October 8, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
|
Risk of rain
30%
If rain:
weak
|
sunny
39%
|
|
|
October 9, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.0°C
|
Risk of rain
30%
If rain:
weak
|
sunny
39%
|
|
|
October 10, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.0°C
|
Risk of rain
31%
If rain:
weak
|
sunny
39%
|
|
|
October 11, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.0°C
|
Risk of rain
32%
If rain:
weak
|
sunny
39%
|
|
|
October 12, 2026
|
25°C /
28°C
Likely temperature:
26.0°C -
27.0°C
|
Risk of rain
32%
If rain:
weak
|
sunny
39%
|
|
|
October 13, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
31%
If rain:
weak
|
sunny
40%
|
|
|
October 14, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
31%
If rain:
weak
|
sunny
40%
|
|
|
October 15, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
30%
If rain:
weak
|
sunny
42%
|
|
|
October 16, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
29%
If rain:
weak
|
sunny
43%
|
|
|
October 17, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
28%
If rain:
weak
|
sunny
44%
|
|
|
October 18, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
28%
If rain:
weak
|
sunny
45%
|
|
|
October 19, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
27%
If rain:
weak
|
sunny
45%
|
|
|
October 20, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
27%
If rain:
weak
|
sunny
45%
|
|
|
October 21, 2026
|
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
27%
If rain:
weak
|
sunny
46%
|
|
|
October 22, 2026
|
25°C /
27°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
28%
If rain:
weak
|
sunny
46%
|
|
|
October 23, 2026
|
25°C /
27°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
28%
If rain:
weak
|
sunny
46%
|
|
|
October 24, 2026
|
25°C /
27°C
Likely temperature:
25.8°C -
27.0°C
|
Risk of rain
29%
If rain:
weak
|
sunny
46%
|
|
|
October 25, 2026
|
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
|
Risk of rain
30%
If rain:
weak
|
sunny
46%
|
|
|
October 26, 2026
|
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
|
Risk of rain
30%
If rain:
weak
|
sunny
47%
|
|
|
October 27, 2026
|
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
|
Risk of rain
30%
If rain:
weak
|
sunny
48%
|
|
|
October 28, 2026
|
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
|
Risk of rain
31%
If rain:
weak
|
sunny
48%
|
|
|
October 29, 2026
|
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
|
Risk of rain
31%
If rain:
weak
|
sunny
48%
|
September 30, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.3°C -
27.3°C
Rain
Risk of rain
35%
If rain:
weak
Dominant weather
sunny
40%
October 1, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.3°C -
27.3°C
Rain
Risk of rain
34%
If rain:
weak
Dominant weather
sunny
39%
October 2, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
Rain
Risk of rain
33%
If rain:
weak
Dominant weather
sunny
39%
October 3, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
Rain
Risk of rain
32%
If rain:
weak
Dominant weather
sunny
39%
October 4, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
Rain
Risk of rain
31%
If rain:
weak
Dominant weather
sunny
39%
October 5, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
Rain
Risk of rain
31%
If rain:
weak
Dominant weather
sunny
39%
October 6, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
Rain
Risk of rain
31%
If rain:
weak
Dominant weather
sunny
39%
October 7, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
Rain
Risk of rain
30%
If rain:
weak
Dominant weather
sunny
39%
October 8, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.3°C
Rain
Risk of rain
30%
If rain:
weak
Dominant weather
sunny
39%
October 9, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.0°C
Rain
Risk of rain
30%
If rain:
weak
Dominant weather
sunny
39%
October 10, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.0°C
Rain
Risk of rain
31%
If rain:
weak
Dominant weather
sunny
39%
October 11, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.0°C
Rain
Risk of rain
32%
If rain:
weak
Dominant weather
sunny
39%
October 12, 2026
Temperatures
25°C /
28°C
Likely temperature:
26.0°C -
27.0°C
Rain
Risk of rain
32%
If rain:
weak
Dominant weather
sunny
39%
October 13, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
31%
If rain:
weak
Dominant weather
sunny
40%
October 14, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
31%
If rain:
weak
Dominant weather
sunny
40%
October 15, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
30%
If rain:
weak
Dominant weather
sunny
42%
October 16, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
29%
If rain:
weak
Dominant weather
sunny
43%
October 17, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
28%
If rain:
weak
Dominant weather
sunny
44%
October 18, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
28%
If rain:
weak
Dominant weather
sunny
45%
October 19, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
27%
If rain:
weak
Dominant weather
sunny
45%
October 20, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
27%
If rain:
weak
Dominant weather
sunny
45%
October 21, 2026
Temperatures
25°C /
28°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
27%
If rain:
weak
Dominant weather
sunny
46%
October 22, 2026
Temperatures
25°C /
27°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
28%
If rain:
weak
Dominant weather
sunny
46%
October 23, 2026
Temperatures
25°C /
27°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
28%
If rain:
weak
Dominant weather
sunny
46%
October 24, 2026
Temperatures
25°C /
27°C
Likely temperature:
25.8°C -
27.0°C
Rain
Risk of rain
29%
If rain:
weak
Dominant weather
sunny
46%
October 25, 2026
Temperatures
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
Rain
Risk of rain
30%
If rain:
weak
Dominant weather
sunny
46%
October 26, 2026
Temperatures
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
Rain
Risk of rain
30%
If rain:
weak
Dominant weather
sunny
47%
October 27, 2026
Temperatures
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
Rain
Risk of rain
30%
If rain:
weak
Dominant weather
sunny
48%
October 28, 2026
Temperatures
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
Rain
Risk of rain
31%
If rain:
weak
Dominant weather
sunny
48%
October 29, 2026
Temperatures
25°C /
27°C
Likely temperature:
25.5°C -
27.0°C
Rain
Risk of rain
31%
If rain:
weak
Dominant weather
sunny
48%
This 30-day weather forecast in Waialua allows you to quickly identify the mildest, wettest, or most changeable stretches in the coming month.
Week-by-week weather trend in Waialua 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 Waialua.
Week 40
28 September - 4 October 2026
sunny
40%
rainy
35%
clearings
25%
Likely temperature
25°C / 28°C
Probable rain
2.3 days -
12 mm
Week 41
5 - 11 October 2026
sunny
39%
rainy
33%
clearings
26%
Likely temperature
25°C / 28°C
Probable rain
2.2 days -
11 mm
Week 42
12 - 18 October 2026
sunny
42%
rainy
33%
clearings
22%
Likely temperature
25°C / 28°C
Probable rain
2.1 days -
12 mm
Week 43
19 - 25 October 2026
sunny
46%
rainy
29%
clearings
22%
Likely temperature
25°C / 28°C
Probable rain
2.0 days -
10 mm
Week 44
26 October - 1 November 2026
sunny
47%
rainy
30%
clearings
20%
Likely temperature
25°C / 27°C
Probable rain
2.2 days -
10 mm
Week 45
2 - 8 November 2026
sunny
42%
rainy
35%
clearings
21%
Likely temperature
24°C / 27°C
Probable rain
2.1 days -
8 mm
Week 46
9 - 15 November 2026
sunny
41%
rainy
36%
clearings
21%
Likely temperature
24°C / 27°C
Probable rain
1.7 days -
8 mm
Week 47
16 - 22 November 2026
sunny
38%
rainy
32%
clearings
23%
cloudy
7%
Likely temperature
24°C / 26°C
Probable rain
2.0 days -
10 mm
Week 48
23 - 29 November 2026
sunny
39%
rainy
28%
clearings
22%
cloudy
11%
Likely temperature
23°C / 26°C
Probable rain
2.0 days -
10 mm
Week 49
30 November - 6 December 2026
sunny
38%
rainy
29%
clearings
26%
cloudy
6%
Likely temperature
23°C / 26°C
Probable rain
2.2 days -
11 mm
3-month weather trend in Waialua
Temperatures, rain, sunshine and prevailing weather for the coming month and the following two months in Waialua, Hawaii.
September 2026
sunny
47%
rainy
30%
clearings
22%
Likely temperature
25°C / 28°C
Average temperature
26.8°C
Probable rain
29 mm
Rainy days
10 days
Average sun/day
10.8 h
Average wind
19 km/h
Average humidity
78%
Cloud cover
36%
October 2026
sunny
43%
rainy
32%
clearings
23%
Likely temperature
25°C / 28°C
Average temperature
26.5°C
Probable rain
36 mm
Rainy days
12 days
Average sun/day
10.1 h
Average wind
17 km/h
Average humidity
78%
Cloud cover
41%
November 2026
sunny
40%
rainy
32%
clearings
22%
cloudy
6%
Likely temperature
24°C / 27°C
Average temperature
25.3°C
Probable rain
31 mm
Rainy days
9 days
Average sun/day
7.7 h
Average wind
21 km/h
Average humidity
78%
Cloud cover
47%
This 3-month weather trend in Waialua helps anticipate the next month and the two following for a stay, a departure, or seasonal planning.
Month-by-month weather forecast in Waialua over 12 months
Easily compare over 1 year the likely weather for each upcoming month in Waialua, Hawaii to choose the best time based on heat, rain, or sunshine.
September 2026
sunny
47%
rainy
30%
clearings
22%
25°C
28°C
29 mm
10 days
average confidence
October 2026
sunny
43%
rainy
32%
clearings
23%
25°C
28°C
36 mm
12 days
average confidence
November 2026
sunny
40%
rainy
32%
clearings
22%
cloudy
6%
24°C
27°C
31 mm
9 days
average confidence
December 2026
sunny
38%
rainy
32%
clearings
24%
cloudy
5%
23°C
25°C
30 mm
9 days
average confidence
January 2027
sunny
46%
rainy
28%
clearings
21%
22°C
25°C
31 mm
8 days
high confidence
February 2027
rainy
38%
sunny
35%
clearings
22%
21°C
24°C
52 mm
8 days
average confidence
March 2027
rainy
35%
sunny
34%
clearings
24%
cloudy
8%
22°C
24°C
50 mm
13 days
average confidence
April 2027
rainy
33%
sunny
31%
clearings
27%
cloudy
8%
23°C
25°C
36 mm
12 days
average confidence
May 2027
rainy
37%
sunny
35%
clearings
22%
cloudy
5%
24°C
26°C
37 mm
14 days
average confidence
June 2027
sunny
43%
rainy
29%
clearings
24%
25°C
27°C
27 mm
9 days
average confidence
July 2027
sunny
40%
rainy
33%
clearings
23%
25°C
28°C
27 mm
11 days
average confidence
August 2027
sunny
45%
rainy
27%
clearings
23%
25°C
28°C
27 mm
9 days
average confidence
This 12-month weather calendar in Waialua makes it easy to compare the warmest, driest, or sunniest periods.
Compare these forecasts with the weather archives of Waialua
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 Waialua
Find the towns near of Waialua on the map and compare their long-term weather forecasts to choose the most favorable area.
Long-term weather forecast calculation method in Waialua
These long-term weather trends in Waialua 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.