Lamu climate — normals and trends
Lamu (Kenya) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.2 °C and it receives 826 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 (27.5 °C on average) and the coldest is August (24.7 °C). Rainfall peaks in May.
Lamu averages 0 frost days, 3 hot days (≥ 30 °C) and 166 rainy days per year.
Lamu has warmed by +0.9 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.8 °C (on 19 March 1941) and the coldest 22.1 °C (on 5 September 1943).
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
LamuLamu
- coords
- -2.27°, 40.90°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.2°C
Average daily high
27.2°C
Average daily low
25.3°C
Annual rainfall
826mm
Sunshine / day
11.4h
Mean relative humidity
81%
Average peak wind
26.5km/h
Seasonal range
2.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
166 d/yr
Annual snowfall
0.0 cm
Average feels-like high
30.5 °C
Average feels-like low
27.4 °C
Average peak gust
38.9 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.61 · 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
31.8 °C
19 March 1941
Coldest day
22.1 °C
5 September 1943
Wettest day
186 mm
11 May 2020
Windiest day
48.4 km/h
21 May 2024
Strongest gust
75.2 km/h
21 May 2024
Hottest feels-like
37.9 °C
6 April 1998
Coldest feels-like
20.9 °C
11 July 1944
Sunniest day
12.1 h
7 February 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 | 28.4 °C | +0.4 °C | 1 mm | -10 mm |
| Feb | 28.3 °C | +0.3 °C | 1 mm | -5 mm |
| Mar | 29.2 °C | +0.6 °C | 13 mm | -15 mm |
| Apr | 28.9 °C | +0.5 °C | 140 mm | -8 mm |
| May | 27.8 °C | +0.5 °C | 203 mm | -24 mm |
| Jun | 27.0 °C | +0.5 °C | 113 mm | +21 mm |
| Jul | 26.4 °C | +0.6 °C | 49 mm | -17 mm |
| Aug | 26.0 °C | +0.3 °C | 38 mm | -8 mm |
| Sep | 26.7 °C | +0.7 °C | 28 mm | -14 mm |
| Oct | 27.3 °C | +0.6 °C | 39 mm | -22 mm |
| Nov | 28.4 °C | +0.8 °C | 16 mm | -46 mm |
| Dec | 28.8 °C | +0.6 °C | 10 mm | -29 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 Lamu?
Lamu has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.2 °C and it receives 826 mm of precipitation per year.
What is the hottest day ever recorded in Lamu?
The hottest day measured in Lamu between 1940 and 2025 was 19 March 1941, reaching 31.8 °C.
What is the coldest day in Lamu?
The coldest day measured in Lamu between 1940 and 2025 was 5 September 1943, at 22.1 °C.
Does it snow in Lamu?
Almost never: Lamu sees virtually no snow, with about 0 frost days per year.
Has the climate of Lamu warmed?
Yes: Lamu warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Lamu?
The wettest day measured in Lamu between 1940 and 2025 was 11 May 2020, with 186 mm of rain in 24 hours.
What was the windiest day in Lamu?
The windiest day measured in Lamu between 1940 and 2025 was 21 May 2024, with winds reaching 48.4 km/h.
What is the warmest month in Lamu?
The warmest month in Lamu is March (27.5 °C on average); the coldest is August (24.7 °C).
How much does it rain in Lamu?
Lamu receives on average 826 mm of precipitation per year, spread over about 166 rainy days.
Is it sunny in Lamu?
Lamu gets on average 11.4 hours of sunshine per day, roughly 4,161 hours per year over 1940-2025.
Are there tropical nights in Lamu?
Yes: Lamu has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Lamu?
In Lamu, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 6 April 1998, and the lowest was 20.9 °C on 11 July 1944.
Compare Lamu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Lamu