Kaimuki climate — normals and trends
Kaimuki (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 375 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 September (25.4 °C on average) and the coldest is February (22.3 °C). Rainfall peaks in January.
Kaimuki averages 0 frost days, 0 hot days (≥ 30 °C) and 56 rainy days per year.
Kaimuki has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The hottest day of the period reached 28.8 °C (on 1 September 2015) and the coldest 16.7 °C (on 17 December 1988).
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
KaimukiHawaii
- coords
- 21.28°, -157.80°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.9°C
Average daily high
24.5°C
Average daily low
23.2°C
Annual rainfall
375mm
Sunshine / day
11.5h
Mean relative humidity
76%
Average peak wind
30.8km/h
Seasonal range
3.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
56 d/yr
Annual snowfall
0.0 cm
Average feels-like high
25.8 °C
Average feels-like low
22.8 °C
Average peak gust
44.8 km/h
Tropical nights (≥ 20 °C)
360 d/yr
Solar radiation
21.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.36 · 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
28.8 °C
1 September 2015
Coldest day
16.7 °C
17 December 1988
Wettest day
195 mm
6 February 1976
Windiest day
73.8 km/h
23 November 1982
Strongest gust
111.2 km/h
23 November 1982
Hottest feels-like
35.9 °C
1 September 2015
Coldest feels-like
11.1 °C
20 February 1962
Sunniest day
13.0 h
11 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 | 24.3 °C | +1.0 °C | 58 mm | -9 mm |
| Feb | 24.3 °C | +1.3 °C | 11 mm | -36 mm |
| Mar | 24.4 °C | +1.3 °C | 13 mm | -35 mm |
| Apr | 24.7 °C | +1.2 °C | 25 mm | +3 mm |
| May | 25.2 °C | +0.9 °C | 9 mm | -6 mm |
| Jun | 25.9 °C | +0.8 °C | 7 mm | -1 mm |
| Jul | 26.2 °C | +0.7 °C | 8 mm | -1 mm |
| Aug | 26.6 °C | +0.7 °C | 4 mm | -8 mm |
| Sep | 26.7 °C | +0.7 °C | 8 mm | -5 mm |
| Oct | 26.4 °C | +0.6 °C | 15 mm | -14 mm |
| Nov | 25.5 °C | +0.6 °C | 14 mm | -36 mm |
| Dec | 25.0 °C | +1.1 °C | 76 mm | +18 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 Kaimuki?
Kaimuki has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 23.9 °C and it receives 375 mm of precipitation per year.
What is the hottest day ever recorded in Kaimuki?
The hottest day measured in Kaimuki between 1940 and 2025 was 1 September 2015, reaching 28.8 °C.
What is the coldest day in Kaimuki?
The coldest day measured in Kaimuki between 1940 and 2025 was 17 December 1988, at 16.7 °C.
Does it snow in Kaimuki?
Almost never: Kaimuki sees virtually no snow, with about 0 frost days per year.
Has the climate of Kaimuki warmed?
Yes: Kaimuki warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kaimuki?
The wettest day measured in Kaimuki between 1940 and 2025 was 6 February 1976, with 195 mm of rain in 24 hours.
What was the windiest day in Kaimuki?
The windiest day measured in Kaimuki between 1940 and 2025 was 23 November 1982, with winds reaching 73.8 km/h.
What is the warmest month in Kaimuki?
The warmest month in Kaimuki is September (25.4 °C on average); the coldest is February (22.3 °C).
How much does it rain in Kaimuki?
Kaimuki receives on average 375 mm of precipitation per year, spread over about 56 rainy days.
Is it sunny in Kaimuki?
Kaimuki gets on average 11.5 hours of sunshine per day, roughly 4,198 hours per year over 1940-2025.
Are there tropical nights in Kaimuki?
Yes: Kaimuki has on average 360 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kaimuki?
In Kaimuki, between 1940 and 2025, the highest apparent temperature reached 35.9 °C on 1 September 2015, and the lowest was 11.1 °C on 20 February 1962.
Compare Kaimuki with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kaimuki