Fomboni climate — normals and trends
Fomboni (Comoros) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.0 °C and it receives 844 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 (27.2 °C on average) and the coldest is August (24.3 °C). Rainfall peaks in January.
Fomboni averages 0 frost days, 0 hot days (≥ 30 °C) and 128 rainy days per year.
Fomboni has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 30.1 °C (on 24 March 1941) and the coldest 21.3 °C (on 3 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
FomboniMohéli
- coords
- -12.29°, 43.74°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.0°C
Average daily high
26.6°C
Average daily low
25.4°C
Annual rainfall
844mm
Sunshine / day
11.2h
Mean relative humidity
79%
Average peak wind
21.6km/h
Seasonal range
2.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
0.0 cm
Average feels-like high
30.5 °C
Average feels-like low
27.6 °C
Average peak gust
30.4 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
20.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.56 · 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
30.1 °C
24 March 1941
Coldest day
21.3 °C
3 September 1943
Wettest day
193 mm
27 March 1941
Windiest day
85.1 km/h
10 April 1941
Strongest gust
122.4 km/h
10 April 1941
Hottest feels-like
37.8 °C
9 March 2016
Coldest feels-like
18.1 °C
14 August 1993
Sunniest day
12.6 h
21 January 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 | +0.7 °C | 103 mm | -75 mm |
| Feb | 28.8 °C | +1.0 °C | 72 mm | -77 mm |
| Mar | 28.7 °C | +0.9 °C | 135 mm | -20 mm |
| Apr | 28.6 °C | +0.8 °C | 41 mm | -74 mm |
| May | 28.1 °C | +1.1 °C | 73 mm | +30 mm |
| Jun | 26.7 °C | +0.8 °C | 19 mm | -1 mm |
| Jul | 25.6 °C | +0.6 °C | 17 mm | +0 mm |
| Aug | 25.0 °C | +0.3 °C | 12 mm | +0 mm |
| Sep | 25.6 °C | +0.6 °C | 6 mm | -3 mm |
| Oct | 26.3 °C | +0.5 °C | 14 mm | +0 mm |
| Nov | 27.4 °C | +0.7 °C | 30 mm | -2 mm |
| Dec | 28.2 °C | +0.8 °C | 34 mm | -67 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 Fomboni?
Fomboni has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.0 °C and it receives 844 mm of precipitation per year.
What is the hottest day ever recorded in Fomboni?
The hottest day measured in Fomboni between 1940 and 2025 was 24 March 1941, reaching 30.1 °C.
What is the coldest day in Fomboni?
The coldest day measured in Fomboni between 1940 and 2025 was 3 September 1943, at 21.3 °C.
Does it snow in Fomboni?
Almost never: Fomboni sees virtually no snow, with about 0 frost days per year.
Has the climate of Fomboni warmed?
Yes: Fomboni warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Fomboni?
The wettest day measured in Fomboni between 1940 and 2025 was 27 March 1941, with 193 mm of rain in 24 hours.
What was the windiest day in Fomboni?
The windiest day measured in Fomboni between 1940 and 2025 was 10 April 1941, with winds reaching 85.1 km/h.
What is the warmest month in Fomboni?
The warmest month in Fomboni is March (27.2 °C on average); the coldest is August (24.3 °C).
How much does it rain in Fomboni?
Fomboni receives on average 844 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Fomboni?
Fomboni gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
Are there tropical nights in Fomboni?
Yes: Fomboni has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Fomboni?
In Fomboni, between 1940 and 2025, the highest apparent temperature reached 37.8 °C on 9 March 2016, and the lowest was 18.1 °C on 14 August 1993.
Compare Fomboni with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Fomboni