Few mainland French towns get more rain than Boissezon: 1,653 mm a year
The warmest part of a July day comes in at 27.8°C on average. By warm days alone, it ranks hotter than 78% of mainland French towns. Rain follows the seasons: November brings about 3.1 times as much as July. Plan time outside for May, June, September and October, when highs sit at 19–25°C.
These are the figures of Météo-France’s Rouairoux station, 19 km south-east.
A year in Boissezon at a glance
Each month’s typical high and low in °C, at the Rouairoux station.
What a year in Boissezon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Rouairoux.
About 1,653 mm of rain a year
November is the wettest month and July the driest. About 51 days a year bring 10 mm or more. The wettest of 27 towns of 2,500+ in Tarn.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Carcassonne
43 frosts and 87 days of 25°C a year
On about 43 nights a year the air drops to 0°C or below, and on about 3 days it stays below freezing all day. About 87 days a year reach 25°C, and 34 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Rouairoux: 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 Rouairoux
Rouairoux is 19 km south-east of Boissezon. Every figure on this page is the station’s, not a measurement in Boissezon itself.
| Station (Météo-France number) | Rouairoux (81231001) |
| Distance from the town | 19 km south-east |
| Station altitude | 347 m |
| Town altitude (its center) | 407 m |
| Period | 1992–2020 (the station’s own record) |
| Nearest station of any kind | 13 km |
| Sunshine measured at | Carcassonne, 41 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 Boissezon 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 Tarn.
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 |
|---|---|---|---|---|
| Boissezon | Rouairoux | 27.8°C | 2.2°C | 1,653 mm |
| Pont-de-Larn 6.4 km | same station | 27.8°C about the same | 2.2°C about the same | 1,653 mm |
| Aussillon 8.3 km | Dourgne | 28.3°C 0.5°C warmer | 2.5°C about the same | 896 mm |
| Aiguefonde 9.2 km | Dourgne | 28.3°C 0.5°C warmer | 2.5°C about the same | 896 mm |
| Mazamet 9.4 km | Dourgne | 28.3°C 0.5°C warmer | 2.5°C about the same | 896 mm |
| Labruguière 11 km | Dourgne | 28.3°C 0.5°C warmer | 2.5°C about the same | 896 mm |
| Castres 12 km | Dourgne | 28.3°C 0.5°C warmer | 2.5°C about the same | 896 mm |
Boissezon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Rouairoux station; sunshine at Carcassonne.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.0°C | 2.2°C | 5.6°C | 192 mm | 95 |
| February | 10.3°C | 2.0°C | 6.1°C | 155 mm | 122 |
| March | 14.0°C | 3.7°C | 8.9°C | 150 mm | 174 |
| April | 17.1°C | 6.1°C | 11.6°C | 152 mm | 192 |
| May | 21.1°C | 9.5°C | 15.3°C | 130 mm | 220 |
| June | 25.2°C | 12.7°C | 19.0°C | 79 mm | 248 |
| July | 27.8°C | 14.3°C | 21.0°C | 64 mm | 283 |
| August | 28.2°C | 14.4°C | 21.3°C | 68 mm | 268 |
| September | 23.8°C | 11.4°C | 17.6°C | 102 mm | 216 |
| October | 18.7°C | 9.5°C | 14.1°C | 170 mm | 152 |
| November | 12.6°C | 5.4°C | 9.0°C | 198 mm | 105 |
| December | 9.8°C | 2.9°C | 6.3°C | 194 mm | 95 |
| Year | 18.1°C | 7.8°C | 13.0°C | 1,653 mm | 2,170 |
Where Boissezon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Rouairoux, 19 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, Carcassonne, 41 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 Tarn.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Boissezon’s climate
How warm does Boissezon get in summer?
August is the warmest month, with average highs of 28.2°C. About 87 days a year reach 25°C, more than 78% of mainland French towns, and about 34 reach 30°C.
How cold does Boissezon get in winter?
February nights average 2.0°C. The air drops to 0°C or below on about 43 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Boissezon get?
About 1,653 mm a year, more than almost every mainland French town. November is the wettest month (198 mm) and July the driest (64 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Carcassonne (41 km away), averages 2,170 hours of sunshine a year.
Are these figures for Boissezon itself?
No: they are the normals of the Météo-France station matched to Boissezon, Rouairoux, 19 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 ROUAIROUX, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Boissezon →
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.