Afternoons in Ouanary reach 30 to 34 degrees in every month of the year
Measured over a year, the rain totals 3,312 mm. Its July, January and rain figures all sit close to those of typical mainland French towns. Wet weather is most frequent in May and least in September.
Figures from Météo-France’s Saint-Georges station, 38 km south: at that distance, read them as the area’s climate rather than the town’s.
A year in Ouanary at a glance
Each month’s typical high and low in °C, at the Saint-Georges station.
What a year in Ouanary feels like
Typical highs and lows in the rainier and the drier half of the year, and by month, from Météo-France’s 1991–2020 normals at Saint-Georges.
About 3,312 mm of rain a year
May is the wettest month and September the driest. About 104 days a year bring 10 mm or more. 7th wettest of 15 towns of 2,500+ in French Guiana.
Rain by month
Millimeters
The Météo-France station at Saint-Georges
Saint-Georges is 38 km south of Ouanary. Every figure on this page is the station’s, not a measurement in Ouanary itself.
| Station (Météo-France number) | Saint-Georges (97308001) |
| Distance from the town | 38 km south |
| Station altitude | 6 m |
| Town altitude (its center) | 29 m |
| Period | 1991–2020 |
TownRatings matches each commune to one station with at least 24 years of temperature and rain records: the nearest, counting every 100 m of height difference as 10 km, never across the sea.
How Ouanary compares
Against the 15 towns of 2,500+ in French Guiana (the dots). Mainland France’s towns aren’t a fair comparison for a tropical climate.
Ouanary weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Georges station.
| Month | High | Low | Mean | Rain |
|---|---|---|---|---|
| January | 29.8°C | 22.5°C | 26.1°C | 394 mm |
| February | 29.7°C | 22.6°C | 26.2°C | 390 mm |
| March | 30.2°C | 22.6°C | 26.4°C | 376 mm |
| April | 30.3°C | 23.0°C | 26.6°C | 472 mm |
| May | 30.3°C | 23.1°C | 26.7°C | 546 mm |
| June | 30.9°C | 22.6°C | 26.7°C | 331 mm |
| July | 31.6°C | 22.1°C | 26.8°C | 208 mm |
| August | 32.8°C | 22.0°C | 27.4°C | 102 mm |
| September | 33.8°C | 21.8°C | 27.8°C | 41 mm |
| October | 34.2°C | 21.8°C | 28.0°C | 44 mm |
| November | 33.2°C | 22.1°C | 27.6°C | 115 mm |
| December | 31.1°C | 22.5°C | 26.8°C | 294 mm |
| Year | 31.5°C | 22.4°C | 26.9°C | 3,312 mm |
Where Ouanary’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Georges, 38 km away: statistics for 1991–2020.
- Which station: among stations with at least 24 of the 30 years of temperature and rain, the nearest to the commune’s population-weighted center, counting each 100 m of height difference as 10 km; mainland towns use mainland stations and each overseas département its own.
- Altitudes: the town’s from IGN’s RGE ALTI® at its population-weighted center; the station’s from Météo-France.
- Comparisons: the towns of 2,500+ in French Guiana, read the same way.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Ouanary’s climate
How warm does Ouanary get in summer?
October is the warmest month, with average highs of 34.2°C. Météo-France publishes no count of hot days for this station.
Does Ouanary ever get cool?
Not much: the coolest nights, in September, average 21.8°C.
How much rain does Ouanary get?
About 3,312 mm a year. May is the wettest month (546 mm) and September the driest (41 mm).
Are these figures for Ouanary itself?
No: they are the normals of the Météo-France station matched to Ouanary, Saint-Georges, 38 km away. France publishes its climate normals by station, not by commune; a valley, a hill or the sea can make a difference over a few kilometers.
Where do these figures come from?
Météo-France’s fiches climatologiques: 30-year averages (1991–2020) for each of its long-running stations, published as open data since 2024. They are normals, not a forecast.
Source: Météo-France, fiches climatologiques, 1991–2020 statistics (station SAINT GEORGES, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Ouanary →
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.