Athi River climate — normals and trends
Athi River (Kenya) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 18.6 °C and it receives 740 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 March (20.1 °C on average) and the coldest is July (16.8 °C). Rainfall peaks in April.
Athi River averages 0 frost days, 1 hot days (≥ 30 °C) and 145 rainy days per year.
Athi River has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.6 °C (on 25 February 2005) and the coldest 7.7 °C (on 22 August 1969).
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
Athi RiverMachakos County
- coords
- -1.46°, 36.98°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.6°C
Average daily high
23.9°C
Average daily low
14.4°C
Annual rainfall
740mm
Sunshine / day
10.5h
Mean relative humidity
72%
Average peak wind
14.9km/h
Seasonal range
3.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
145 d/yr
Annual snowfall
0.0 cm
Average feels-like high
24.2 °C
Average feels-like low
14.5 °C
Average peak gust
33.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
19.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.63 · 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
31.6 °C
25 February 2005
Coldest day
7.7 °C
22 August 1969
Wettest day
97 mm
14 May 1981
Windiest day
26.9 km/h
14 January 1957
Strongest gust
56.9 km/h
17 February 1975
Hottest feels-like
33.9 °C
25 February 2005
Coldest feels-like
6.2 °C
10 August 1959
Sunniest day
12.1 h
24 December 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 | 25.7 °C | +0.8 °C | 66 mm | +18 mm |
| Feb | 27.1 °C | +1.1 °C | 3 mm | -41 mm |
| Mar | 27.0 °C | +1.2 °C | 48 mm | -29 mm |
| Apr | 25.4 °C | +1.0 °C | 157 mm | +1 mm |
| May | 24.4 °C | +1.3 °C | 134 mm | +28 mm |
| Jun | 23.3 °C | +1.0 °C | 34 mm | +1 mm |
| Jul | 22.4 °C | +0.6 °C | 15 mm | -3 mm |
| Aug | 22.2 °C | -0.1 °C | 44 mm | +27 mm |
| Sep | 25.8 °C | +1.6 °C | 7 mm | -5 mm |
| Oct | 25.6 °C | +0.6 °C | 33 mm | -3 mm |
| Nov | 25.1 °C | +1.6 °C | 30 mm | -88 mm |
| Dec | 25.4 °C | +1.8 °C | 85 mm | +11 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 Athi River?
Athi River has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 18.6 °C and it receives 740 mm of precipitation per year.
What is the hottest day ever recorded in Athi River?
The hottest day measured in Athi River between 1940 and 2025 was 25 February 2005, reaching 31.6 °C.
What is the coldest day in Athi River?
The coldest day measured in Athi River between 1940 and 2025 was 22 August 1969, at 7.7 °C.
Does it snow in Athi River?
Almost never: Athi River sees virtually no snow, with about 0 frost days per year.
Has the climate of Athi River warmed?
Yes: Athi River warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Athi River?
The wettest day measured in Athi River between 1940 and 2025 was 14 May 1981, with 97 mm of rain in 24 hours.
What was the windiest day in Athi River?
The windiest day measured in Athi River between 1940 and 2025 was 14 January 1957, with winds reaching 26.9 km/h.
What is the warmest month in Athi River?
The warmest month in Athi River is March (20.1 °C on average); the coldest is July (16.8 °C).
How much does it rain in Athi River?
Athi River receives on average 740 mm of precipitation per year, spread over about 145 rainy days.
Is it sunny in Athi River?
Athi River gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.
Are there tropical nights in Athi River?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Athi River.
What was the most extreme apparent temperature in Athi River?
In Athi River, between 1940 and 2025, the highest apparent temperature reached 33.9 °C on 25 February 2005, and the lowest was 6.2 °C on 10 August 1959.
Compare Athi River with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Athi River