Photo: Wolfgang Bauer · Public domainJanuary in Blain stays gentler than in 74% of mainland French towns
The warmest part of a July day comes in at 25.6°C on average. By warm days alone, it ranks cooler than 63% of mainland French towns. December is the wettest month, July the driest. Gritters and ice scrapers earn their keep on roughly 37 nights a year below 0°C.
These are the figures of Météo-France’s Nort-sur-Erdre station, 20 km east.
A year in Blain at a glance
Each month’s typical high and low in °C, at the Nort-sur-Erdre station.
What a year in Blain feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Nort-sur-Erdre.
About 760 mm of rain a year
December is the wettest month and July the driest. About 23 days a year bring 10 mm or more. 99th wettest of 133 towns of 2,500+ in Loire-Atlantique.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Saint-Nazaire-Montoir
37 frosts and 55 days of 25°C a year
On about 37 nights a year the air drops to 0°C or below, and on about 1 days it stays below freezing all day. About 55 days a year reach 25°C, and 14 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Nort-sur-Erdre: 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 Nort-sur-Erdre
Nort-sur-Erdre is 20 km east of Blain. Every figure on this page is the station’s, not a measurement in Blain itself.
| Station (Météo-France number) | Nort-sur-Erdre (44110002) |
| Distance from the town | 20 km east |
| Station altitude | 13 m |
| Town altitude (its center) | 17 m |
| Period | 1991–2020 |
| Nearest station of any kind | 0.4 km |
| Sunshine measured at | Saint-Nazaire-Montoir, 34 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 Blain 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 Loire-Atlantique.
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 |
|---|---|---|---|---|
| Blain | Nort-sur-Erdre | 25.6°C | 3.0°C | 760 mm |
| Fay-de-Bretagne 8 km | same station | 25.6°C about the same | 3.0°C about the same | 760 mm |
| Bouvron 9.5 km | Saint-Nazaire-Montoir | 24.4°C 1.2°C cooler | 3.7°C 0.7°C milder | 792 mm |
| Héric 11 km | same station | 25.6°C about the same | 3.0°C about the same | 760 mm |
| Plessé 13 km | Saint-Jacut-les-Pins | 24.8°C 0.8°C cooler | 3.4°C about the same | 948 mm |
| Saffré 14 km | same station | 25.6°C about the same | 3.0°C about the same | 760 mm |
| Guenrouet 15 km | Saint-Nazaire-Montoir | 24.4°C 1.2°C cooler | 3.7°C 0.7°C milder | 792 mm |
Blain weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Nort-sur-Erdre station; sunshine at Saint-Nazaire-Montoir.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.2°C | 3.0°C | 6.1°C | 82 mm | 73 |
| February | 10.4°C | 2.6°C | 6.5°C | 63 mm | 102 |
| March | 13.4°C | 4.1°C | 8.8°C | 55 mm | 149 |
| April | 16.3°C | 5.4°C | 10.9°C | 58 mm | 175 |
| May | 19.8°C | 8.8°C | 14.3°C | 55 mm | 207 |
| June | 23.4°C | 11.6°C | 17.5°C | 48 mm | 233 |
| July | 25.6°C | 13.2°C | 19.4°C | 42 mm | 233 |
| August | 25.8°C | 13.2°C | 19.5°C | 44 mm | 234 |
| September | 22.6°C | 10.7°C | 16.7°C | 60 mm | 198 |
| October | 17.6°C | 8.8°C | 13.2°C | 81 mm | 128 |
| November | 12.7°C | 5.4°C | 9.1°C | 86 mm | 90 |
| December | 9.7°C | 3.3°C | 6.5°C | 87 mm | 72 |
| Year | 17.2°C | 7.5°C | 12.4°C | 760 mm | 1,893 |
Where Blain’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Nort-sur-Erdre, 20 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, Saint-Nazaire-Montoir, 34 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 Loire-Atlantique.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Blain’s climate
How warm does Blain get in summer?
August is the warmest month, with average highs of 25.8°C. About 55 days a year reach 25°C, fewer than 63% of mainland French towns, and about 14 reach 30°C.
How cold does Blain get in winter?
February nights average 2.6°C. The air drops to 0°C or below on about 37 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Blain get?
About 760 mm a year, more than 52% of mainland French towns. December is the wettest month (87 mm) and July the driest (42 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Nazaire-Montoir (34 km away), averages 1,893 hours of sunshine a year.
Are these figures for Blain itself?
No: they are the normals of the Météo-France station matched to Blain, Nort-sur-Erdre, 20 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 NORT-SUR-ERDRE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Blain →
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.