Photo: Serge Lacotte · CC BY-SA 3.0January in Tonnay-Charente stays gentler than in 92% of mainland French towns
Sunny July days climb to about 25.5°C. Only 22°C separates winter nights from summer afternoons. Its July afternoons stay fresher than in 64% of mainland French towns. Gritters and ice scrapers earn their keep on roughly 23 nights a year below 0°C.
These are the figures of Météo-France’s Saint-Agnant station, 10 km south-west.
A year in Tonnay-Charente at a glance
Each month’s typical high and low in °C, at the Saint-Agnant station.
What a year in Tonnay-Charente feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Agnant.
About 778 mm of rain a year
November is the wettest month and July the driest. About 23 days a year bring 10 mm or more. 31st wettest of 54 towns of 2,500+ in Charente-Maritime.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at La Rochelle-Île de Re
23 frosts and 56 days of 25°C a year
On about 23 nights a year the air drops to 0°C or below, and on about under 1 days it stays below freezing all day. About 56 days a year reach 25°C, and 15 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Agnant: a frost is a night of 0°C or below, a summer day (jour d’été) 25°C or more, a hot day (forte chaleur) 30°C or more.
The Météo-France station at Saint-Agnant
Saint-Agnant is 10 km south-west of Tonnay-Charente. Every figure on this page is the station’s, not a measurement in Tonnay-Charente itself.
| Station (Météo-France number) | Saint-Agnant (17308001) |
| Distance from the town | 10 km south-west |
| Station altitude | 18 m |
| Town altitude (its center) | 20 m |
| Period | 1992–2020 (the station’s own record) |
| Sunshine measured at | La Rochelle-Île de Re, 34 km away |
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 Tonnay-Charente compares
Against the 4,385 towns of 2,500 or more in mainland France, each read from its own matched station. The dots are the other towns of 2,500+ in Charente-Maritime.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km. Where a neighbor uses the same station its figures are the same: the differences you’d feel over a few kilometers aren’t in the normals.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Tonnay-Charente | Saint-Agnant | 25.5°C | 4.0°C | 778 mm |
| Rochefort 6 km | same station | 25.5°C about the same | 4.0°C about the same | 778 mm |
| Échillais 7.3 km | same station | 25.5°C about the same | 4.0°C about the same | 778 mm |
| Soubise 9.6 km | same station | 25.5°C about the same | 4.0°C about the same | 778 mm |
| Saint-Agnant 10 km | same station | 25.5°C about the same | 4.0°C about the same | 778 mm |
| Fouras 15 km | Saint-Laurent Prée-Inrae | 25.0°C 0.5°C cooler | 3.5°C 0.5°C colder | 781 mm |
| Aigrefeuille-d'Aunis 19 km | Saint-Laurent Prée-Inrae | 25.0°C 0.5°C cooler | 3.5°C 0.5°C colder | 781 mm |
Tonnay-Charente weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Agnant station; sunshine at La Rochelle-Île de Re.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.9°C | 4.0°C | 6.9°C | 77 mm | 91 |
| February | 11.0°C | 3.7°C | 7.4°C | 57 mm | 131 |
| March | 14.0°C | 5.4°C | 9.7°C | 58 mm | 179 |
| April | 16.7°C | 7.4°C | 12.1°C | 65 mm | 231 |
| May | 20.2°C | 10.9°C | 15.6°C | 58 mm | 258 |
| June | 23.6°C | 14.1°C | 18.8°C | 47 mm | 253 |
| July | 25.5°C | 15.7°C | 20.6°C | 37 mm | 297 |
| August | 25.6°C | 15.5°C | 20.6°C | 44 mm | 278 |
| September | 23.1°C | 12.8°C | 17.9°C | 62 mm | 234 |
| October | 18.7°C | 10.5°C | 14.6°C | 83 mm | 155 |
| November | 13.5°C | 6.8°C | 10.1°C | 98 mm | 109 |
| December | 10.4°C | 4.3°C | 7.4°C | 93 mm | 90 |
| Year | 17.7°C | 9.3°C | 13.5°C | 778 mm | 2,303 |
Where Tonnay-Charente’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Agnant, 10 km away: statistics for 1991–2020 (the station’s own years, 1992–2020, where its record is shorter).
- 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.
- Sunshine: the nearest station with at least 10 years of sunshine records, La Rochelle-Île de Re, 34 km away.
- Comparisons: every town of 2,500 or more in mainland France, read the same way; the dots are the towns of 2,500+ in Charente-Maritime.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Tonnay-Charente’s climate
How warm does Tonnay-Charente get in summer?
August is the warmest month, with average highs of 25.6°C. About 56 days a year reach 25°C, fewer than 61% of mainland French towns, and about 15 reach 30°C.
How cold does Tonnay-Charente get in winter?
February nights average 3.7°C. The air drops to 0°C or below on about 23 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Tonnay-Charente get?
About 778 mm a year, more than 55% of mainland French towns. November is the wettest month (98 mm) and July the driest (37 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, La Rochelle-Île de Re (34 km away), averages 2,303 hours of sunshine a year.
Are these figures for Tonnay-Charente itself?
No: they are the normals of the Météo-France station matched to Tonnay-Charente, Saint-Agnant, 10 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 ST AGNANT, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Tonnay-Charente →
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.