Landerneau is among the mainland French towns with the fewest days of 25 degrees or more
Deep winter brings January lows near 4.4°C. In January, nights here are milder than in 95% of mainland French towns. December is the wettest month, June the driest. Comfortable outdoor weather lasts from May to September, with highs of 17–22°C.
Figures from Météo-France’s Ploudaniel-Inrae station, 7.7 km north-west.
A year in Landerneau at a glance
Each month’s typical high and low in °C, at the Ploudaniel-Inrae station.
What a year in Landerneau feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Ploudaniel-Inrae.
About 1,147 mm of rain a year
December is the wettest month and June the driest. About 37 days a year bring 10 mm or more. 44th wettest of 91 towns of 2,500+ in Finistère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Brest-Guipavas
21 frosts and 13 days of 25°C a year
On about 21 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 13 days a year reach 25°C, and 1 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Ploudaniel-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 Ploudaniel-Inrae
Ploudaniel-Inrae is 7.7 km north-west of Landerneau. Every figure on this page is the station’s, not a measurement in Landerneau itself.
| Station (Météo-France number) | Ploudaniel-Inrae (29179001) |
| Distance from the town | 7.7 km north-west |
| Station altitude | 76 m |
| Town altitude (its center) | 16 m |
| Period | 1991–2020 |
| Sunshine measured at | Brest-Guipavas, 9.7 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 Landerneau 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 |
|---|---|---|---|---|
| Landerneau | Ploudaniel-Inrae | 21.3°C | 4.4°C | 1,147 mm |
| Plouédern 3 km | same station | 21.3°C about the same | 4.4°C about the same | 1,147 mm |
| Loperhet 9.3 km | Brest-Guipavas | 20.8°C 0.5°C cooler | 4.6°C about the same | 1,230 mm |
| Ploudaniel 9.9 km | same station | 21.3°C about the same | 4.4°C about the same | 1,147 mm |
| Guipavas 11 km | Brest-Guipavas | 20.8°C 0.5°C cooler | 4.6°C about the same | 1,230 mm |
| Le Relecq-Kerhuon 12 km | Brest-Guipavas | 20.8°C 0.5°C cooler | 4.6°C about the same | 1,230 mm |
| Plougastel-Daoulas 13 km | Brest-Guipavas | 20.8°C 0.5°C cooler | 4.6°C about the same | 1,230 mm |
Landerneau weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Ploudaniel-Inrae station; sunshine at Brest-Guipavas.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.8°C | 4.4°C | 7.1°C | 132 mm | 61 |
| February | 10.2°C | 3.9°C | 7.1°C | 111 mm | 82 |
| March | 12.2°C | 4.9°C | 8.5°C | 77 mm | 122 |
| April | 14.1°C | 5.6°C | 9.9°C | 84 mm | 165 |
| May | 17.0°C | 8.4°C | 12.7°C | 71 mm | 188 |
| June | 19.5°C | 10.8°C | 15.1°C | 60 mm | 184 |
| July | 21.3°C | 12.5°C | 16.9°C | 64 mm | 180 |
| August | 21.5°C | 12.5°C | 17.0°C | 68 mm | 172 |
| September | 19.8°C | 10.6°C | 15.2°C | 69 mm | 158 |
| October | 16.3°C | 9.0°C | 12.7°C | 122 mm | 109 |
| November | 12.7°C | 6.6°C | 9.7°C | 143 mm | 72 |
| December | 10.4°C | 4.8°C | 7.6°C | 147 mm | 61 |
| Year | 15.4°C | 7.8°C | 11.6°C | 1,147 mm | 1,555 |
Where Landerneau’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Ploudaniel-Inrae, 7.7 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, 9.7 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 Landerneau’s climate
How warm does Landerneau get in summer?
August is the warmest month, with average highs of 21.5°C. About 13 days a year reach 25°C, fewer than 98% of mainland French towns, and about 1 reach 30°C.
How cold does Landerneau get in winter?
February nights average 3.9°C. The air drops to 0°C or below on about 21 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Landerneau get?
About 1,147 mm a year, more than 93% of mainland French towns. December is the wettest month (147 mm) and June the driest (60 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Brest-Guipavas (9.7 km away), averages 1,555 hours of sunshine a year.
Are these figures for Landerneau itself?
No: they are the normals of the Météo-France station matched to Landerneau, Ploudaniel-Inrae, 7.7 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 PLOUDANIEL-INRAE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Landerneau →
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.