Imerintsiatosika climate — normals and trends
Imerintsiatosika (Madagascar) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 17.7 °C and it receives 1,189 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 (20.1 °C on average) and the coldest is July (13.8 °C). Rainfall peaks in January.
Imerintsiatosika averages 0 frost days, 2 hot days (≥ 30 °C) and 119 rainy days per year.
Imerintsiatosika has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.3 °C (on 20 December 2024) and the coldest 1.7 °C (on 10 July 1987).
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
ImerintsiatosikaItasy
- coords
- -18.98°, 47.32°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.7°C
Average daily high
23.4°C
Average daily low
13.4°C
Annual rainfall
1,189mm
Sunshine / day
10.6h
Mean relative humidity
74%
Average peak wind
15.3km/h
Seasonal range
6.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
119 d/yr
Annual snowfall
0.0 cm
Average feels-like high
23.6 °C
Average feels-like low
12.7 °C
Average peak gust
34.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
19.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.83 · 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
33.3 °C
20 December 2024
Coldest day
1.7 °C
10 July 1987
Wettest day
148 mm
14 February 2012
Windiest day
55.5 km/h
3 February 1994
Strongest gust
128.9 km/h
3 February 1994
Hottest feels-like
36.3 °C
20 December 2024
Coldest feels-like
-1.2 °C
9 July 1987
Sunniest day
13.1 h
3 January 2013
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 | 27.9 °C | +2.8 °C | 167 mm | -106 mm |
| Feb | 26.0 °C | +1.0 °C | 567 mm | +329 mm |
| Mar | 26.1 °C | +1.4 °C | 102 mm | -68 mm |
| Apr | 26.6 °C | +2.7 °C | 26 mm | -23 mm |
| May | 23.4 °C | +1.4 °C | 17 mm | +2 mm |
| Jun | 21.8 °C | +1.8 °C | 4 mm | -1 mm |
| Jul | 20.2 °C | +0.7 °C | 0 mm | -5 mm |
| Aug | 22.1 °C | +1.4 °C | 18 mm | +11 mm |
| Sep | 25.5 °C | +2.2 °C | 0 mm | -10 mm |
| Oct | 26.4 °C | +1.0 °C | 40 mm | -17 mm |
| Nov | 26.4 °C | +0.6 °C | 239 mm | +107 mm |
| Dec | 24.6 °C | -0.8 °C | 466 mm | +238 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 Imerintsiatosika?
Imerintsiatosika has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 17.7 °C and it receives 1,189 mm of precipitation per year.
What is the hottest day ever recorded in Imerintsiatosika?
The hottest day measured in Imerintsiatosika between 1940 and 2025 was 20 December 2024, reaching 33.3 °C.
What is the coldest day in Imerintsiatosika?
The coldest day measured in Imerintsiatosika between 1940 and 2025 was 10 July 1987, at 1.7 °C.
Does it snow in Imerintsiatosika?
Almost never: Imerintsiatosika sees virtually no snow, with about 0 frost days per year.
Has the climate of Imerintsiatosika warmed?
Yes: Imerintsiatosika warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Imerintsiatosika?
The wettest day measured in Imerintsiatosika between 1940 and 2025 was 14 February 2012, with 148 mm of rain in 24 hours.
What was the windiest day in Imerintsiatosika?
The windiest day measured in Imerintsiatosika between 1940 and 2025 was 3 February 1994, with winds reaching 55.5 km/h.
What is the warmest month in Imerintsiatosika?
The warmest month in Imerintsiatosika is January (20.1 °C on average); the coldest is July (13.8 °C).
How much does it rain in Imerintsiatosika?
Imerintsiatosika receives on average 1,189 mm of precipitation per year, spread over about 119 rainy days.
Is it sunny in Imerintsiatosika?
Imerintsiatosika gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
Are there tropical nights in Imerintsiatosika?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Imerintsiatosika.
What was the most extreme apparent temperature in Imerintsiatosika?
In Imerintsiatosika, between 1940 and 2025, the highest apparent temperature reached 36.3 °C on 20 December 2024, and the lowest was -1.2 °C on 9 July 1987.
Compare Imerintsiatosika with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Imerintsiatosika