Saint-Joseph climate — normals and trends
Saint-Joseph (Réunion) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 23.1 °C and it receives 948 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 February (25.6 °C on average) and the coldest is August (20.6 °C). Rainfall peaks in January.
Saint-Joseph averages 0 frost days, 0 hot days (≥ 30 °C) and 124 rainy days per year.
Saint-Joseph has warmed by +0.9 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 29.3 °C (on 16 March 2025) and the coldest 16.3 °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
Saint-JosephReunion
- coords
- -21.38°, 55.62°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.1°C
Average daily high
23.8°C
Average daily low
22.6°C
Annual rainfall
948mm
Sunshine / day
11.2h
Mean relative humidity
79%
Average peak wind
26.1km/h
Seasonal range
5.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
124 d/yr
Annual snowfall
0.0 cm
Average feels-like high
25.4 °C
Average feels-like low
22.8 °C
Average peak gust
36.7 km/h
Tropical nights (≥ 20 °C)
323 d/yr
Solar radiation
20.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.47 · 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
29.3 °C
16 March 2025
Coldest day
16.3 °C
3 September 1943
Wettest day
180 mm
4 January 2020
Windiest day
114.4 km/h
29 February 1960
Strongest gust
172.8 km/h
28 February 1960
Hottest feels-like
36.9 °C
18 January 2015
Coldest feels-like
10.3 °C
15 August 1961
Sunniest day
13.1 h
13 December 1942
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 | 27.1 °C | +1.0 °C | 38 mm | -123 mm |
| Feb | 27.8 °C | +1.6 °C | 158 mm | +11 mm |
| Mar | 27.2 °C | +1.2 °C | 261 mm | +119 mm |
| Apr | 26.6 °C | +1.4 °C | 53 mm | -39 mm |
| May | 24.7 °C | +1.0 °C | 74 mm | +1 mm |
| Jun | 23.1 °C | +0.7 °C | 23 mm | -34 mm |
| Jul | 21.8 °C | +0.3 °C | 52 mm | +6 mm |
| Aug | 21.4 °C | +0.2 °C | 91 mm | +51 mm |
| Sep | 22.1 °C | +0.6 °C | 12 mm | -12 mm |
| Oct | 23.0 °C | +0.6 °C | 14 mm | -10 mm |
| Nov | 24.3 °C | +0.6 °C | 60 mm | +8 mm |
| Dec | 25.7 °C | +0.6 °C | 131 mm | +40 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 Saint-Joseph?
Saint-Joseph has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 23.1 °C and it receives 948 mm of precipitation per year.
What is the hottest day ever recorded in Saint-Joseph?
The hottest day measured in Saint-Joseph between 1940 and 2025 was 16 March 2025, reaching 29.3 °C.
What is the coldest day in Saint-Joseph?
The coldest day measured in Saint-Joseph between 1940 and 2025 was 3 September 1943, at 16.3 °C.
Does it snow in Saint-Joseph?
Almost never: Saint-Joseph sees virtually no snow, with about 0 frost days per year.
Has the climate of Saint-Joseph warmed?
Yes: Saint-Joseph warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Saint-Joseph?
The wettest day measured in Saint-Joseph between 1940 and 2025 was 4 January 2020, with 180 mm of rain in 24 hours.
What was the windiest day in Saint-Joseph?
The windiest day measured in Saint-Joseph between 1940 and 2025 was 29 February 1960, with winds reaching 114.4 km/h.
What is the warmest month in Saint-Joseph?
The warmest month in Saint-Joseph is February (25.6 °C on average); the coldest is August (20.6 °C).
How much does it rain in Saint-Joseph?
Saint-Joseph receives on average 948 mm of precipitation per year, spread over about 124 rainy days.
Is it sunny in Saint-Joseph?
Saint-Joseph gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
Are there tropical nights in Saint-Joseph?
Yes: Saint-Joseph has on average 323 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Saint-Joseph?
In Saint-Joseph, between 1940 and 2025, the highest apparent temperature reached 36.9 °C on 18 January 2015, and the lowest was 10.3 °C on 15 August 1961.
Compare Saint-Joseph with another city
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Nearby cities
The climate around Saint-Joseph