Antsiranana climate — normals and trends
Antsiranana (Madagascar) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.3 °C and it receives 831 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 April (26.5 °C on average) and the coldest is August (23.6 °C). Rainfall peaks in January.
Antsiranana averages 0 frost days, 123 hot days (≥ 30 °C) and 110 rainy days per year.
Antsiranana has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The hottest day of the period reached 34.5 °C (on 6 April 2013) and the coldest 17.8 °C (on 29 August 2021).
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
AntsirananaDiana
- coords
- -12.32°, 49.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.3°C
Average daily high
29.3°C
Average daily low
22.6°C
Annual rainfall
831mm
Sunshine / day
10.9h
Mean relative humidity
73%
Average peak wind
22.5km/h
Seasonal range
2.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
123 d/yr
Rainy days (≥ 1 mm)
110 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.2 °C
Average feels-like low
23.9 °C
Average peak gust
50.2 km/h
Tropical nights (≥ 20 °C)
353 d/yr
Solar radiation
20.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.59 · 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
34.5 °C
6 April 2013
Coldest day
17.8 °C
29 August 2021
Wettest day
248 mm
29 April 1966
Windiest day
59.8 km/h
13 December 2024
Strongest gust
120.6 km/h
23 January 1940
Hottest feels-like
40.5 °C
13 March 2019
Coldest feels-like
14.6 °C
2 September 1984
Sunniest day
12.7 h
14 December 2025
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 | 30.2 °C | +1.0 °C | 300 mm | +54 mm |
| Feb | 30.1 °C | +1.0 °C | 155 mm | -46 mm |
| Mar | 30.3 °C | +0.7 °C | 142 mm | -2 mm |
| Apr | 31.5 °C | +1.2 °C | 16 mm | -39 mm |
| May | 31.3 °C | +1.4 °C | 11 mm | -2 mm |
| Jun | 29.5 °C | +0.9 °C | 3 mm | -3 mm |
| Jul | 28.8 °C | +1.0 °C | 1 mm | -4 mm |
| Aug | 28.8 °C | +0.9 °C | 5 mm | +2 mm |
| Sep | 29.7 °C | +1.2 °C | 4 mm | +1 mm |
| Oct | 30.4 °C | +0.9 °C | 6 mm | -4 mm |
| Nov | 31.2 °C | +0.7 °C | 59 mm | +29 mm |
| Dec | 31.1 °C | +0.7 °C | 69 mm | -47 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 Antsiranana?
Antsiranana has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.3 °C and it receives 831 mm of precipitation per year.
What is the hottest day ever recorded in Antsiranana?
The hottest day measured in Antsiranana between 1940 and 2025 was 6 April 2013, reaching 34.5 °C.
What is the coldest day in Antsiranana?
The coldest day measured in Antsiranana between 1940 and 2025 was 29 August 2021, at 17.8 °C.
Does it snow in Antsiranana?
Almost never: Antsiranana sees virtually no snow, with about 0 frost days per year.
Has the climate of Antsiranana warmed?
Yes: Antsiranana warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Antsiranana?
The wettest day measured in Antsiranana between 1940 and 2025 was 29 April 1966, with 248 mm of rain in 24 hours.
What was the windiest day in Antsiranana?
The windiest day measured in Antsiranana between 1940 and 2025 was 13 December 2024, with winds reaching 59.8 km/h.
What is the warmest month in Antsiranana?
The warmest month in Antsiranana is April (26.5 °C on average); the coldest is August (23.6 °C).
How much does it rain in Antsiranana?
Antsiranana receives on average 831 mm of precipitation per year, spread over about 110 rainy days.
Is it sunny in Antsiranana?
Antsiranana gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
Are there tropical nights in Antsiranana?
Yes: Antsiranana has on average 353 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Antsiranana?
In Antsiranana, between 1940 and 2025, the highest apparent temperature reached 40.5 °C on 13 March 2019, and the lowest was 14.6 °C on 2 September 1984.
Compare Antsiranana with another city
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Nearby cities
The climate around Antsiranana