Préfailles has some of the mildest winter nights among mainland French towns
High summer brings afternoon highs near 22.7°C. It is a dry place: less rain falls here than on 96% of mainland French towns. A year here swings 18°C from midwinter lows to midsummer highs. Windscreens need scraping on about 12 mornings a year, the nights the air drops below 0°C.
These are the figures of Météo-France’s Pte de Chemoulin station, 13 km north-west.
A year in Préfailles at a glance
Each month’s typical high and low in °C, at the Pte de Chemoulin station.
What a year in Préfailles feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Pte de Chemoulin.
About 595 mm of rain a year
December is the wettest month and June the driest. About 14 days a year bring 10 mm or more. 125th wettest of 133 towns of 2,500+ in Loire-Atlantique.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Saint-Nazaire-Montoir
12 frosts and 30 days of 25°C a year
On about 12 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 30 days a year reach 25°C, and 5 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Pte de Chemoulin: 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 Pte de Chemoulin
Pte de Chemoulin is 13 km north-west of Préfailles. Every figure on this page is the station’s, not a measurement in Préfailles itself.
| Station (Météo-France number) | Pte de Chemoulin (44184001) |
| Distance from the town | 13 km north-west |
| Station altitude | 14 m |
| Town altitude (its center) | 22 m |
| Period | 1991–2014 (the station’s own record) |
| Sunshine measured at | Saint-Nazaire-Montoir, 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 Préfailles 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 |
|---|---|---|---|---|
| Préfailles | Pte de Chemoulin | 22.7°C | 5.0°C | 595 mm |
| La Plaine-sur-Mer 2.7 km | same station | 22.7°C about the same | 5.0°C about the same | 595 mm |
| Saint-Michel-Chef-Chef 7.1 km | same station | 22.7°C about the same | 5.0°C about the same | 595 mm |
| Pornic 9.6 km | Noirmoutier en | 23.3°C 0.6°C warmer | 5.2°C about the same | 704 mm |
| Saint-Brevin-les-Pins 13 km | Saint-Nazaire-Montoir | 24.4°C 1.7°C warmer | 3.7°C 1.3°C colder | 792 mm |
| Noirmoutier-en-l'Île 14 km | Noirmoutier en | 23.3°C 0.6°C warmer | 5.2°C about the same | 704 mm |
| La Bernerie-en-Retz 15 km | Noirmoutier en | 23.3°C 0.6°C warmer | 5.2°C about the same | 704 mm |
Préfailles weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Pte de Chemoulin station; sunshine at Saint-Nazaire-Montoir.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.2°C | 5.0°C | 7.1°C | 61 mm | 73 |
| February | 10.0°C | 4.9°C | 7.4°C | 48 mm | 102 |
| March | 12.7°C | 6.6°C | 9.7°C | 45 mm | 149 |
| April | 15.1°C | 8.3°C | 11.7°C | 44 mm | 175 |
| May | 18.5°C | 11.3°C | 14.9°C | 42 mm | 207 |
| June | 21.4°C | 13.8°C | 17.6°C | 29 mm | 233 |
| July | 22.7°C | 15.6°C | 19.1°C | 35 mm | 233 |
| August | 23.2°C | 15.8°C | 19.5°C | 33 mm | 234 |
| September | 21.4°C | 13.9°C | 17.7°C | 47 mm | 198 |
| October | 17.3°C | 11.7°C | 14.5°C | 69 mm | 128 |
| November | 13.2°C | 8.2°C | 10.7°C | 71 mm | 90 |
| December | 10.0°C | 5.5°C | 7.8°C | 72 mm | 72 |
| Year | 16.2°C | 10.1°C | 13.1°C | 595 mm | 1,893 |
Where Préfailles’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Pte de Chemoulin, 13 km away: statistics for 1991–2020 (the station’s own years, 1991–2014, 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, Saint-Nazaire-Montoir, 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 Loire-Atlantique.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Préfailles’s climate
How warm does Préfailles get in summer?
August is the warmest month, with average highs of 23.2°C. About 30 days a year reach 25°C, fewer than 92% of mainland French towns, and about 5 reach 30°C.
How cold does Préfailles get in winter?
February nights average 4.9°C. The air drops to 0°C or below on about 12 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Préfailles get?
About 595 mm a year, less than 96% of mainland French towns. December is the wettest month (72 mm) and June the driest (29 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Nazaire-Montoir (21 km away), averages 1,893 hours of sunshine a year.
Are these figures for Préfailles itself?
No: they are the normals of the Météo-France station matched to Préfailles, Pte de Chemoulin, 13 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 PTE DE CHEMOULIN, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Préfailles →
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.