Kahului climate — normals and trends
Kahului (United States) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 23.9 °C and it receives 349 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (25.6 °C on average) and the coldest is February (22.0 °C). Rainfall peaks in January.
Kahului averages 0 frost days, 6 hot days (≥ 30 °C) and 69 rainy days per year.
Kahului has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.7 °C (on 15 September 2019) and the coldest 15.2 °C (on 4 January 1947).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
KahuluiHawaii
- coords
- 20.89°, -156.47°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.9°C
Average daily high
26.7°C
Average daily low
21.8°C
Annual rainfall
349mm
Sunshine / day
11.4h
Mean relative humidity
71%
Average peak wind
21.2km/h
Seasonal range
3.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
69 d/yr
Annual snowfall
0.0 cm
Average feels-like high
28.0 °C
Average feels-like low
22.8 °C
Average peak gust
44.7 km/h
Tropical nights (≥ 20 °C)
316 d/yr
Solar radiation
20.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.52 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
31.7 °C
15 September 2019
Coldest day
15.2 °C
4 January 1947
Wettest day
121 mm
17 March 1997
Windiest day
49.2 km/h
27 January 1991
Strongest gust
101.5 km/h
31 January 1963
Hottest feels-like
38.4 °C
25 September 2018
Coldest feels-like
12.0 °C
5 March 1954
Sunniest day
13.0 h
25 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 26.3 °C | +1.4 °C | 53 mm | -4 mm |
| Feb | 26.4 °C | +1.6 °C | 15 mm | -27 mm |
| Mar | 27.0 °C | +2.0 °C | 15 mm | -33 mm |
| Apr | 27.5 °C | +1.8 °C | 43 mm | +16 mm |
| May | 27.9 °C | +1.1 °C | 13 mm | -3 mm |
| Jun | 28.6 °C | +0.9 °C | 3 mm | -7 mm |
| Jul | 28.8 °C | +0.7 °C | 10 mm | -4 mm |
| Aug | 29.4 °C | +0.9 °C | 3 mm | -14 mm |
| Sep | 29.2 °C | +0.7 °C | 9 mm | -4 mm |
| Oct | 28.8 °C | +0.8 °C | 12 mm | -11 mm |
| Nov | 27.5 °C | +0.8 °C | 21 mm | -14 mm |
| Dec | 27.3 °C | +1.9 °C | 15 mm | -31 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Kahului?
Kahului has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 23.9 °C and it receives 349 mm of precipitation per year.
What is the hottest day ever recorded in Kahului?
The hottest day measured in Kahului between 1940 and 2025 was 15 September 2019, reaching 31.7 °C.
What is the coldest day in Kahului?
The coldest day measured in Kahului between 1940 and 2025 was 4 January 1947, at 15.2 °C.
Does it snow in Kahului?
Almost never: Kahului sees virtually no snow, with about 0 frost days per year.
Has the climate of Kahului warmed?
Yes: Kahului warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kahului?
The wettest day measured in Kahului between 1940 and 2025 was 17 March 1997, with 121 mm of rain in 24 hours.
What was the windiest day in Kahului?
The windiest day measured in Kahului between 1940 and 2025 was 27 January 1991, with winds reaching 49.2 km/h.
What is the warmest month in Kahului?
The warmest month in Kahului is August (25.6 °C on average); the coldest is February (22.0 °C).
How much does it rain in Kahului?
Kahului receives on average 349 mm of precipitation per year, spread over about 69 rainy days.
Is it sunny in Kahului?
Kahului gets on average 11.4 hours of sunshine per day, roughly 4,161 hours per year over 1940-2025.
Are there tropical nights in Kahului?
Yes: Kahului has on average 316 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kahului?
In Kahului, between 1940 and 2025, the highest apparent temperature reached 38.4 °C on 25 September 2018, and the lowest was 12.0 °C on 5 March 1954.
Compare Kahului with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kahului