January in Assérac stays gentler than in 87% of mainland French towns
Peak summer warmth arrives in July, with afternoons near 24.6°C. By July afternoons alone, it runs cooler than 77% of mainland French towns. Expect the heaviest rain in December and the lightest in June. The outdoor season runs from May to October, with highs of 18–25°C.
Figures from Météo-France’s Herbignac station, 5.6 km east.
A year in Assérac at a glance
Each month’s typical high and low in °C, at the Herbignac station.
What a year in Assérac feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Herbignac.
About 886 mm of rain a year
December is the wettest month and June the driest. About 28 days a year bring 10 mm or more. 4th wettest of 133 towns of 2,500+ in Loire-Atlantique.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Saint-Nazaire-Montoir
29 frosts and 44 days of 25°C a year
On about 29 nights a year the air drops to 0°C or below, and on about under 1 days it stays below freezing all day. About 44 days a year reach 25°C, and 10 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Herbignac: 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 Herbignac
Herbignac is 5.6 km east of Assérac. Every figure on this page is the station’s, not a measurement in Assérac itself.
| Station (Météo-France number) | Herbignac (44072002) |
| Distance from the town | 5.6 km east |
| Station altitude | 22 m |
| Town altitude (its center) | 21 m |
| Period | 1991–2020 |
| Sunshine measured at | Saint-Nazaire-Montoir, 24 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 Assérac 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 |
|---|---|---|---|---|
| Assérac | Herbignac | 24.6°C | 3.6°C | 886 mm |
| Saint-Molf 5.2 km | same station | 24.6°C about the same | 3.6°C about the same | 886 mm |
| Herbignac 7 km | same station | 24.6°C about the same | 3.6°C about the same | 886 mm |
| Férel 7.6 km | Arzal | 23.6°C 1°C cooler | 3.5°C about the same | 887 mm |
| Saint-Lyphard 8.6 km | same station | 24.6°C about the same | 3.6°C about the same | 886 mm |
| Piriac-sur-Mer 11 km | same station | 24.6°C about the same | 3.6°C about the same | 886 mm |
| La Turballe 12 km | same station | 24.6°C about the same | 3.6°C about the same | 886 mm |
Assérac weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Herbignac station; sunshine at Saint-Nazaire-Montoir.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.9°C | 3.6°C | 6.8°C | 99 mm | 73 |
| February | 10.9°C | 3.2°C | 7.0°C | 76 mm | 102 |
| March | 13.6°C | 4.7°C | 9.2°C | 63 mm | 149 |
| April | 16.3°C | 6.1°C | 11.2°C | 64 mm | 175 |
| May | 19.6°C | 9.3°C | 14.5°C | 58 mm | 207 |
| June | 22.7°C | 12.0°C | 17.3°C | 45 mm | 233 |
| July | 24.6°C | 13.6°C | 19.1°C | 46 mm | 233 |
| August | 24.9°C | 13.5°C | 19.2°C | 50 mm | 234 |
| September | 22.3°C | 11.3°C | 16.8°C | 71 mm | 198 |
| October | 17.8°C | 9.3°C | 13.6°C | 96 mm | 128 |
| November | 13.5°C | 5.9°C | 9.7°C | 108 mm | 90 |
| December | 10.6°C | 3.9°C | 7.2°C | 110 mm | 72 |
| Year | 17.2°C | 8.0°C | 12.6°C | 886 mm | 1,893 |
Where Assérac’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Herbignac, 5.6 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, 24 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 Assérac’s climate
How warm does Assérac get in summer?
August is the warmest month, with average highs of 24.9°C. About 44 days a year reach 25°C, fewer than 76% of mainland French towns, and about 10 reach 30°C.
How cold does Assérac get in winter?
February nights average 3.2°C. The air drops to 0°C or below on about 29 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Assérac get?
About 886 mm a year, more than 76% of mainland French towns. December is the wettest month (110 mm) and June the driest (45 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Nazaire-Montoir (24 km away), averages 1,893 hours of sunshine a year.
Are these figures for Assérac itself?
No: they are the normals of the Météo-France station matched to Assérac, Herbignac, 5.6 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 HERBIGNAC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Assérac →
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.