Amboasary climate — normals and trends
Amboasary (Madagascar) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 23.1 °C and it receives 569 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 January (26.3 °C on average) and the coldest is July (18.9 °C). Rainfall peaks in January.
Amboasary averages 0 frost days, 153 hot days (≥ 30 °C) and 99 rainy days per year.
Amboasary 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 41.7 °C (on 8 January 2025) and the coldest 8.7 °C (on 16 July 1965).
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
AmboasaryAnosy
- coords
- -25.03°, 46.38°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.1°C
Average daily high
29.0°C
Average daily low
18.7°C
Annual rainfall
569mm
Sunshine / day
10.9h
Mean relative humidity
73%
Average peak wind
15.9km/h
Seasonal range
7.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
153 d/yr
Rainy days (≥ 1 mm)
99 d/yr
Annual snowfall
0.0 cm
Average feels-like high
30.7 °C
Average feels-like low
20.1 °C
Average peak gust
38.5 km/h
Tropical nights (≥ 20 °C)
149 d/yr
Solar radiation
19.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.55 · 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
41.7 °C
8 January 2025
Coldest day
8.7 °C
16 July 1965
Wettest day
175 mm
27 February 1989
Windiest day
45.2 km/h
18 March 1941
Strongest gust
114.5 km/h
18 March 1941
Hottest feels-like
45.2 °C
1 February 2021
Coldest feels-like
6.7 °C
16 July 1965
Sunniest day
13.6 h
26 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 | 34.9 °C | +3.2 °C | 202 mm | +88 mm |
| Feb | 30.7 °C | -0.7 °C | 166 mm | +69 mm |
| Mar | 29.7 °C | -0.7 °C | 146 mm | +68 mm |
| Apr | 30.3 °C | +1.2 °C | 14 mm | -23 mm |
| May | 27.4 °C | +0.5 °C | 21 mm | -3 mm |
| Jun | 26.3 °C | +1.3 °C | 8 mm | -8 mm |
| Jul | 23.9 °C | -0.9 °C | 42 mm | +29 mm |
| Aug | 26.0 °C | -0.3 °C | 18 mm | +5 mm |
| Sep | 30.1 °C | +1.4 °C | 3 mm | -11 mm |
| Oct | 30.6 °C | +0.1 °C | 26 mm | +1 mm |
| Nov | 30.1 °C | -1.0 °C | 45 mm | -3 mm |
| Dec | 31.9 °C | +0.3 °C | 48 mm | -43 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 Amboasary?
Amboasary has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 23.1 °C and it receives 569 mm of precipitation per year.
What is the hottest day ever recorded in Amboasary?
The hottest day measured in Amboasary between 1940 and 2025 was 8 January 2025, reaching 41.7 °C.
What is the coldest day in Amboasary?
The coldest day measured in Amboasary between 1940 and 2025 was 16 July 1965, at 8.7 °C.
Does it snow in Amboasary?
Almost never: Amboasary sees virtually no snow, with about 0 frost days per year.
Has the climate of Amboasary warmed?
Yes: Amboasary warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Amboasary?
The wettest day measured in Amboasary between 1940 and 2025 was 27 February 1989, with 175 mm of rain in 24 hours.
What was the windiest day in Amboasary?
The windiest day measured in Amboasary between 1940 and 2025 was 18 March 1941, with winds reaching 45.2 km/h.
What is the warmest month in Amboasary?
The warmest month in Amboasary is January (26.3 °C on average); the coldest is July (18.9 °C).
How much does it rain in Amboasary?
Amboasary receives on average 569 mm of precipitation per year, spread over about 99 rainy days.
Is it sunny in Amboasary?
Amboasary gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
Are there tropical nights in Amboasary?
Yes: Amboasary has on average 149 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Amboasary?
In Amboasary, between 1940 and 2025, the highest apparent temperature reached 45.2 °C on 1 February 2021, and the lowest was 6.7 °C on 16 July 1965.
Compare Amboasary with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Amboasary