Trégunc sits near the bottom of mainland French towns for July heat
Midwinter brings lows of about 4.3°C. Rain is plentiful here, more than falls on 94% of mainland French towns. Wet weather is most frequent in December and least in June. Warm coats and heating bills mark the months from November to March, when means dip under 10°C.
Figures from Météo-France’s Plomelin-Inrae station, 23 km north-west.
A year in Trégunc at a glance
Each month’s typical high and low in °C, at the Plomelin-Inrae station.
What a year in Trégunc feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Plomelin-Inrae.
About 1,150 mm of rain a year
December is the wettest month and June the driest. About 39 days a year bring 10 mm or more. 33rd wettest of 91 towns of 2,500+ in Finistère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Quimper
23 frosts and 21 days of 25°C a year
On about 23 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 21 days a year reach 25°C, and 2 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Plomelin-Inrae: 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 Plomelin-Inrae
Plomelin-Inrae is 23 km north-west of Trégunc. Every figure on this page is the station’s, not a measurement in Trégunc itself.
| Station (Météo-France number) | Plomelin-Inrae (29170001) |
| Distance from the town | 23 km north-west |
| Station altitude | 33 m |
| Town altitude (its center) | 31 m |
| Period | 1991–2020 |
| Nearest station of any kind | 1.1 km |
| Sunshine measured at | Quimper, 27 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 Trégunc 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 |
|---|---|---|---|---|
| Trégunc | Plomelin-Inrae | 22.2°C | 4.3°C | 1,150 mm |
| Concarneau 5.7 km | same station | 22.2°C about the same | 4.3°C about the same | 1,150 mm |
| Névez 6.5 km | Lorient-Lann Bihoue | 22.5°C about the same | 4.0°C about the same | 943 mm |
| Melgven 7.5 km | Quimper | 21.8°C about the same | 4.5°C about the same | 1,214 mm |
| Pont-Aven 7.6 km | Lorient-Lann Bihoue | 22.5°C about the same | 4.0°C about the same | 943 mm |
| La Forêt-Fouesnant 12 km | same station | 22.2°C about the same | 4.3°C about the same | 1,150 mm |
| Riec-sur-Bélon 12 km | Lorient-Lann Bihoue | 22.5°C about the same | 4.0°C about the same | 943 mm |
Trégunc weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Plomelin-Inrae station; sunshine at Quimper.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 10.2°C | 4.3°C | 7.3°C | 140 mm | 66 |
| February | 10.7°C | 3.9°C | 7.3°C | 109 mm | 90 |
| March | 12.7°C | 5.2°C | 9.0°C | 78 mm | 133 |
| April | 14.9°C | 6.3°C | 10.6°C | 81 mm | 177 |
| May | 17.9°C | 9.1°C | 13.5°C | 74 mm | 201 |
| June | 20.5°C | 11.7°C | 16.1°C | 60 mm | 209 |
| July | 22.2°C | 13.3°C | 17.8°C | 63 mm | 205 |
| August | 22.4°C | 13.1°C | 17.7°C | 69 mm | 195 |
| September | 20.4°C | 11.2°C | 15.8°C | 74 mm | 175 |
| October | 16.8°C | 9.4°C | 13.1°C | 113 mm | 112 |
| November | 13.2°C | 6.5°C | 9.9°C | 144 mm | 79 |
| December | 10.9°C | 4.9°C | 7.9°C | 146 mm | 67 |
| Year | 16.1°C | 8.2°C | 12.2°C | 1,150 mm | 1,708 |
Where Trégunc’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Plomelin-Inrae, 23 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.
- Sunshine: the nearest station with at least 10 years of sunshine records, Quimper, 27 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 Trégunc’s climate
How warm does Trégunc get in summer?
August is the warmest month, with average highs of 22.4°C. About 21 days a year reach 25°C, fewer than 95% of mainland French towns, and about 2 reach 30°C.
How cold does Trégunc get in winter?
February nights average 3.9°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 Trégunc get?
About 1,150 mm a year, more than 94% of mainland French towns. December is the wettest month (146 mm) and June the driest (60 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Quimper (27 km away), averages 1,708 hours of sunshine a year.
Are these figures for Trégunc itself?
No: they are the normals of the Météo-France station matched to Trégunc, Plomelin-Inrae, 23 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 PLOMELIN-INRAE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Trégunc →
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.