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 then reach 24 °C75 °F to 29 °C85 °F. Precipitation is 31 mm1.2 in to 55 mm2.2 in 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 ideal. That means 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
The nearest larger place is Port Louis, about 228 km to the east. Compared with it, Saint-Denis is on average 0.5 °C0.8 °F cooler. It receives 17% more precipitation (793 mm31 in vs 676 mm27 in). The difference is largest in June (1.2 °C2.2 °F cooler).
Some places in other countries have a very similar pattern of temperature and rainfall (with seasons shifted for the other hemisphere). The closest matches are Port Louis (Mauritius, Aw), Nassau (Bahamas, Aw) and Vila Velha (Brazil, Aw).
Nearby places
- Climate in Saint-Paul 23 km · 26 °C78 °F · 632 mm25 in
- Climate in Vacoas 221 km · 23 °C73 °F · 716 mm28 in
- Climate in Port Louis 228 km · 25 °C78 °F · 676 mm27 in
- Climate in Toamasina 703 km · 25 °C77 °F · 1,952 mm77 in
- Climate in Antananarivo 856 km · 18 °C64 °F · 2,383 mm94 in
- Climate in Fianarantsoa 870 km · 18 °C65 °F · 1,774 mm70 in
- Climate in Antsirabe 885 km · 17 °C62 °F · 1,910 mm75 in
- Climate 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. Its average high is 30 °C (85 °F) and its average low is 26 °C (78 °F).
What is the coldest month in Saint-Denis?
August is the coldest month. Its average high is 24 °C (75 °F) and its average low is 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. The gaps are largest 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.