Sé climate — normals and trends
Sé (Benin) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 1,521 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 (28.1 °C on average) and the coldest is August (24.7 °C). Rainfall peaks in June.
Sé averages 0 frost days, 204 hot days (≥ 30 °C) and 263 rainy days per year.
Sé has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.7 °C (on 8 February 2020) and the coldest 17.5 °C (on 9 January 1957).
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
SéMono Department
- coords
- 6.51°, 1.83°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
30.1°C
Average daily low
24.0°C
Annual rainfall
1,521mm
Sunshine / day
10.1h
Mean relative humidity
84%
Average peak wind
11.8km/h
Seasonal range
3.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
204 d/yr
Rainy days (≥ 1 mm)
263 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.7 °C
Average feels-like low
28.5 °C
Average peak gust
28.2 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
17.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.2 °C per decade · r² = 0.86 · 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
36.7 °C
8 February 2020
Coldest day
17.5 °C
9 January 1957
Wettest day
117 mm
2 October 2019
Windiest day
22.2 km/h
26 July 1978
Strongest gust
48.2 km/h
3 August 1977
Hottest feels-like
44.2 °C
27 March 2024
Coldest feels-like
14.9 °C
9 January 1957
Sunniest day
12.0 h
17 March 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 | 33.2 °C | +1.8 °C | 20 mm | -21 mm |
| Feb | 32.9 °C | +0.8 °C | 39 mm | -20 mm |
| Mar | 33.1 °C | +1.1 °C | 54 mm | -53 mm |
| Apr | 32.1 °C | +0.6 °C | 78 mm | -69 mm |
| May | 31.5 °C | +1.0 °C | 182 mm | -27 mm |
| Jun | 30.1 °C | +1.2 °C | 248 mm | +32 mm |
| Jul | 28.0 °C | +0.2 °C | 86 mm | -50 mm |
| Aug | 27.8 °C | +0.2 °C | 61 mm | -32 mm |
| Sep | 29.0 °C | +0.5 °C | 195 mm | +42 mm |
| Oct | 30.1 °C | +0.5 °C | 166 mm | -20 mm |
| Nov | 31.2 °C | +0.5 °C | 77 mm | -38 mm |
| Dec | 31.6 °C | +0.6 °C | 56 mm | -3 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 Sé?
Sé has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 1,521 mm of precipitation per year.
What is the hottest day ever recorded in Sé?
The hottest day measured in Sé between 1940 and 2025 was 8 February 2020, reaching 36.7 °C.
What is the coldest day in Sé?
The coldest day measured in Sé between 1940 and 2025 was 9 January 1957, at 17.5 °C.
Does it snow in Sé?
Almost never: Sé sees virtually no snow, with about 0 frost days per year.
Has the climate of Sé warmed?
Yes: Sé warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sé?
The wettest day measured in Sé between 1940 and 2025 was 2 October 2019, with 117 mm of rain in 24 hours.
What was the windiest day in Sé?
The windiest day measured in Sé between 1940 and 2025 was 26 July 1978, with winds reaching 22.2 km/h.
What is the warmest month in Sé?
The warmest month in Sé is March (28.1 °C on average); the coldest is August (24.7 °C).
How much does it rain in Sé?
Sé receives on average 1,521 mm of precipitation per year, spread over about 263 rainy days.
Is it sunny in Sé?
Sé gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
Are there tropical nights in Sé?
Yes: Sé has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sé?
In Sé, between 1940 and 2025, the highest apparent temperature reached 44.2 °C on 27 March 2024, and the lowest was 14.9 °C on 9 January 1957.
Compare Sé with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sé