Saint-Denis climate
Saint-Denis (Reunion) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 25 °C77 °F, and about 793 mm31 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Saint-Denis climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 3085 | 2678 | 2882 | 1405.5 |
| Feb | 3085 | 2678 | 2882 | 1134.5 |
| Mar | 2984 | 2578 | 2781 | 1425.6 |
| Apr | 2882 | 2476 | 2679 | 773.0 |
| May | 2679 | 2373 | 2576 | 532.1 |
| Jun | 2476 | 2170 | 2373 | 371.4 |
| Jul | 2475 | 2069 | 2272 | 311.2 |
| Aug | 2475 | 2068 | 2271 | 311.2 |
| Sep | 2576 | 2069 | 2373 | 331.3 |
| Oct | 2679 | 2271 | 2475 | 341.4 |
| Nov | 2882 | 2373 | 2578 | 461.8 |
| Dec | 2985 | 2576 | 2781 | 552.2 |
| Year | 3085 | 2068 | 2577 | 79331 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 79% | 60% | 6.7 | 13:16 |
| Feb | 80% | 57% | 6.6 | 12:49 |
| Mar | 82% | 56% | 5.9 | 12:16 |
| Apr | 82% | 49% | 5.2 | 11:38 |
| May | 79% | 48% | 4.4 | 11:08 |
| Jun | 78% | 48% | 4.0 | 10:52 |
| Jul | 78% | 48% | 4.2 | 10:59 |
| Aug | 77% | 47% | 5.0 | 11:24 |
| Sep | 76% | 44% | 6.0 | 12:00 |
| Oct | 76% | 44% | 6.8 | 12:37 |
| Nov | 75% | 44% | 7.3 | 13:08 |
| Dec | 75% | 48% | 7.4 | 13:24 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Saint-Denis is like
The warmest month is February, with an average high of 30 °C85 °F and a low of 26 °C78 °F. The coldest is August, when highs average 24 °C75 °F and lows 20 °C68 °F. Seasonal differences are small — just 5.9 °C10.5 °F between the warmest and the coolest month.
Annual precipitation is moderate at about 793 mm31 in. The wettest three-month stretch is January–March, which brings 50% of the annual total. The wettest month is March (142 mm5.6 in), the driest is August (31 mm1.2 in).
Relative humidity ranges from 75% in November to 82% in March. The clearest skies (lowest average cloud amount, 44%) are typical of October. Average wind speed near the ground ranges from 14 km/h (9 mph) in November to 18 km/h (11 mph) in July. Daylight lasts from about 10.9 hours in June to 13.4 hours in December.
Best time to visit Saint-Denis
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–December: average highs of 24 °C75 °F to 29 °C85 °F with 31 mm1.2 in to 55 mm2.2 in of precipitation per month.
The most challenging month is March, which is humid (82% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Saint-Denis
- Wetter months (January–April) — highs 2882 to 30 °C85 °F, lows 2476 to 26 °C78 °F, about 118 mm4.6 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Drier months (May–December) — highs 2475 to 29 °C85 °F, lows 2068 to 25 °C76 °F, about 40 mm1.6 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Saint-Denis compares
Compared with Port Louis, about 228 km to the east, Saint-Denis is on average 0.5 °C0.8 °F cooler and receives 17% more precipitation (793 mm31 in vs 676 mm27 in). The difference is largest in June (1.2 °C2.2 °F cooler).
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Port Louis (Mauritius, Aw), Nassau (Bahamas, Aw) and Vila Velha (Brazil, Aw).
Nearby places
- Saint-Paul 23 km · 26 °C78 °F · 632 mm25 in
- Vacoas 221 km · 23 °C73 °F · 716 mm28 in
- Port Louis 228 km · 25 °C78 °F · 676 mm27 in
- Toamasina 703 km · 25 °C77 °F · 1,952 mm77 in
- Antananarivo 856 km · 18 °C64 °F · 2,383 mm94 in
- Fianarantsoa 870 km · 18 °C65 °F · 1,774 mm70 in
- Antsirabe 885 km · 17 °C62 °F · 1,910 mm75 in
- Mahajanga 1,122 km · 27 °C80 °F · 1,457 mm57 in
Frequently asked questions
What is the warmest month in Saint-Denis?
February is the warmest month in Saint-Denis, with an average high of 30 °C (85 °F) and an average low of 26 °C (78 °F).
What is the coldest month in Saint-Denis?
August is the coldest month, with an average high of 24 °C (75 °F) and an average low of 20 °C (68 °F).
When does it rain the most in Saint-Denis?
March is the wettest month with about 142 mm (5.6 in) of precipitation; August is the driest with about 31 mm (1.2 in).
What is the best time to visit Saint-Denis?
Judging by long-term averages, the most comfortable months are May–December.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 533 m, while Saint-Denis lies at about 44 m. Temperatures on this page were therefore adjusted by +3.2 °C5.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.