Le Trévoux is among the wettest of mainland French towns: 1,215 mm of rain a year
Midsummer highs settle at about 23.7°C. From frosty January to warm July, readings climb 21°C. Of the 91 towns of 2,500+ in Finistère, it has the warmest July afternoons. Plan time outside from May to October, when highs sit at 18–24°C.
Figures from Météo-France’s Lanvénégen station, 15 km north-east.
A year in Le Trévoux at a glance
Each month’s typical high and low in °C, at the Lanvénégen station.
What a year in Le Trévoux feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Lanvénégen.
About 1,215 mm of rain a year
December is the wettest month and June the driest. About 42 days a year bring 10 mm or more. 17th wettest of 91 towns of 2,500+ in Finistère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Lorient-Lann Bihoue
42 frosts and 40 days of 25°C a year
On about 42 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 40 days a year reach 25°C, and 8 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Lanvénégen: 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 Lanvénégen
Lanvénégen is 15 km north-east of Le Trévoux. Every figure on this page is the station’s, not a measurement in Le Trévoux itself.
| Station (Météo-France number) | Lanvénégen (56105001) |
| Distance from the town | 15 km north-east |
| Station altitude | 97 m |
| Town altitude (its center) | 81 m |
| Period | 1994–2020 (the station’s own record) |
| Sunshine measured at | Lorient-Lann Bihoue, 21 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 Le Trévoux 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 Finistère.
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 |
|---|---|---|---|---|
| Le Trévoux | Lanvénégen | 23.7°C | 3.3°C | 1,215 mm |
| Mellac 4.8 km | same station | 23.7°C about the same | 3.3°C about the same | 1,215 mm |
| Bannalec 6.2 km | same station | 23.7°C about the same | 3.3°C about the same | 1,215 mm |
| Riec-sur-Bélon 6.7 km | Lorient-Lann Bihoue | 22.5°C 1.2°C cooler | 4.0°C 0.7°C milder | 943 mm |
| Quimperlé 7.3 km | Lorient-Lann Bihoue | 22.5°C 1.2°C cooler | 4.0°C 0.7°C milder | 943 mm |
| Pont-Aven 9 km | Lorient-Lann Bihoue | 22.5°C 1.2°C cooler | 4.0°C 0.7°C milder | 943 mm |
| Moëlan-sur-Mer 9.6 km | Lorient-Lann Bihoue | 22.5°C 1.2°C cooler | 4.0°C 0.7°C milder | 943 mm |
Le Trévoux weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Lanvénégen station; sunshine at Lorient-Lann Bihoue.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.8°C | 3.3°C | 6.6°C | 148 mm | 71 |
| February | 10.8°C | 3.2°C | 7.0°C | 115 mm | 99 |
| March | 13.2°C | 3.9°C | 8.6°C | 84 mm | 144 |
| April | 16.0°C | 5.2°C | 10.6°C | 87 mm | 191 |
| May | 19.1°C | 8.1°C | 13.6°C | 76 mm | 214 |
| June | 22.0°C | 10.9°C | 16.4°C | 61 mm | 224 |
| July | 23.7°C | 12.7°C | 18.2°C | 62 mm | 232 |
| August | 23.8°C | 12.4°C | 18.1°C | 70 mm | 219 |
| September | 21.7°C | 10.2°C | 16.0°C | 76 mm | 193 |
| October | 17.5°C | 8.8°C | 13.1°C | 138 mm | 120 |
| November | 13.2°C | 5.7°C | 9.4°C | 140 mm | 87 |
| December | 10.4°C | 3.8°C | 7.1°C | 159 mm | 72 |
| Year | 16.8°C | 7.3°C | 12.1°C | 1,215 mm | 1,865 |
Where Le Trévoux’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Lanvénégen, 15 km away: statistics for 1991–2020 (the station’s own years, 1994–2020, 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, Lorient-Lann Bihoue, 21 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 Finistère.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Le Trévoux’s climate
How warm does Le Trévoux get in summer?
August is the warmest month, with average highs of 23.8°C. About 40 days a year reach 25°C, fewer than 80% of mainland French towns, and about 8 reach 30°C.
How cold does Le Trévoux get in winter?
February nights average 3.2°C. The air drops to 0°C or below on about 42 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Le Trévoux get?
About 1,215 mm a year, more than 97% of mainland French towns. December is the wettest month (159 mm) and June the driest (61 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Lorient-Lann Bihoue (21 km away), averages 1,865 hours of sunshine a year.
Are these figures for Le Trévoux itself?
No: they are the normals of the Météo-France station matched to Le Trévoux, Lanvénégen, 15 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 LANVENEGEN, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Le Trévoux →
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.