Dirinon has some of the coolest summers among mainland French towns
The depth of winter brings overnight lows near 4.6°C. A year here swings 17°C from midwinter lows to midsummer highs. By rainfall alone, it ranks wetter than 97% of mainland French towns. Radiators earn their keep from November to March, the months that average under 10°C.
Figures from Météo-France’s Brest-Guipavas station, 10 km north-west.
A year in Dirinon at a glance
Each month’s typical high and low in °C, at the Brest-Guipavas station.
What a year in Dirinon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Brest-Guipavas.
About 1,230 mm of rain a year
December is the wettest month and June the driest. About 40 days a year bring 10 mm or more. 4th wettest of 91 towns of 2,500+ in Finistère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Brest-Guipavas
14 frosts and 11 days of 25°C a year
On about 14 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 11 days a year reach 25°C, and under 1 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Brest-Guipavas: 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 Brest-Guipavas
Brest-Guipavas is 10 km north-west of Dirinon. Every figure on this page is the station’s, not a measurement in Dirinon itself.
| Station (Météo-France number) | Brest-Guipavas (29075001) |
| Distance from the town | 10 km north-west |
| Station altitude | 92 m |
| Town altitude (its center) | 107 m |
| Period | 1991–2020 |
| Sunshine measured at | the same station |
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 Dirinon 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 |
|---|---|---|---|---|
| Dirinon | Brest-Guipavas | 20.8°C | 4.6°C | 1,230 mm |
| Loperhet 4.4 km | same station | 20.8°C about the same | 4.6°C about the same | 1,230 mm |
| Landerneau 5.3 km | Ploudaniel-Inrae | 21.3°C 0.5°C warmer | 4.4°C about the same | 1,147 mm |
| Plouédern 8.2 km | Ploudaniel-Inrae | 21.3°C 0.5°C warmer | 4.4°C about the same | 1,147 mm |
| Plougastel-Daoulas 8.9 km | same station | 20.8°C about the same | 4.6°C about the same | 1,230 mm |
| Le Relecq-Kerhuon 9.6 km | same station | 20.8°C about the same | 4.6°C about the same | 1,230 mm |
| Guipavas 11 km | same station | 20.8°C about the same | 4.6°C about the same | 1,230 mm |
Dirinon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Brest-Guipavas station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.7°C | 4.6°C | 7.1°C | 143 mm | 61 |
| February | 10.0°C | 4.3°C | 7.1°C | 119 mm | 82 |
| March | 11.9°C | 5.4°C | 8.6°C | 82 mm | 122 |
| April | 13.9°C | 6.3°C | 10.1°C | 92 mm | 165 |
| May | 16.8°C | 8.9°C | 12.8°C | 75 mm | 188 |
| June | 19.1°C | 11.4°C | 15.3°C | 65 mm | 184 |
| July | 20.8°C | 13.1°C | 17.0°C | 71 mm | 180 |
| August | 20.9°C | 13.2°C | 17.1°C | 75 mm | 172 |
| September | 19.3°C | 11.5°C | 15.4°C | 79 mm | 158 |
| October | 16.0°C | 9.6°C | 12.8°C | 129 mm | 109 |
| November | 12.5°C | 7.0°C | 9.8°C | 147 mm | 72 |
| December | 10.3°C | 5.0°C | 7.7°C | 155 mm | 61 |
| Year | 15.1°C | 8.4°C | 11.7°C | 1,230 mm | 1,555 |
Where Dirinon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Brest-Guipavas, 10 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, Brest-Guipavas, 10 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 Dirinon’s climate
How warm does Dirinon get in summer?
August is the warmest month, with average highs of 20.9°C. About 11 days a year reach 25°C, fewer than 98% of mainland French towns, and about under 1 reach 30°C.
How cold does Dirinon get in winter?
February nights average 4.3°C. The air drops to 0°C or below on about 14 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Dirinon get?
About 1,230 mm a year, more than 97% of mainland French towns. December is the wettest month (155 mm) and June the driest (65 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Brest-Guipavas (10 km away), averages 1,555 hours of sunshine a year.
Are these figures for Dirinon itself?
No: they are the normals of the Météo-France station matched to Dirinon, Brest-Guipavas, 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 BREST-GUIPAVAS, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Dirinon →
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.