Photo: Pline · CC BY-SA 3.0Dry weather: only 654 mm a year falls on Alfortville, less than on 82% of mainland French towns
On a normal July day the thermometer tops out near 26.8°C. Frost is rarer than in 74% of mainland French towns: about 31 nights a year drop below freezing. Only 24°C separates winter nights from summer afternoons. Expect about 31 frosty starts a year, nights when the air falls below freezing.
These are the figures of Météo-France’s Joinville station, 3.4 km north-east.
A year in Alfortville at a glance
Each month’s typical high and low in °C, at the Joinville station.
What a year in Alfortville feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Joinville.
About 654 mm of rain a year
December is the wettest month and April the driest. About 18 days a year bring 10 mm or more. 19th wettest of 47 towns of 2,500+ in Val-de-Marne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Paris-Montsouris
31 frosts and 71 days of 25°C a year
On about 31 nights a year the air drops to 0°C or below, and on about 2 days it stays below freezing all day. About 71 days a year reach 25°C, and 21 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Joinville: 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 Joinville
Joinville is 3.4 km north-east of Alfortville. Every figure on this page is the station’s, not a measurement in Alfortville itself.
| Station (Météo-France number) | Joinville (94042001) |
| Distance from the town | 3.4 km north-east |
| Station altitude | 37 m |
| Town altitude (its center) | 32 m |
| Period | 1991–2020 |
| Sunshine measured at | Paris-Montsouris, 6.4 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 Alfortville 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 Val-de-Marne.
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 |
|---|---|---|---|---|
| Alfortville | Joinville | 26.8°C | 2.5°C | 654 mm |
| Maisons-Alfort 1.5 km | same station | 26.8°C about the same | 2.5°C about the same | 654 mm |
| Saint-Maurice 2.3 km | same station | 26.8°C about the same | 2.5°C about the same | 654 mm |
| Charenton-le-Pont 2.5 km | same station | 26.8°C about the same | 2.5°C about the same | 654 mm |
| Vitry-sur-Seine 2.7 km | Choisy-le-Roi | 26.2°C 0.6°C cooler | 2.8°C about the same | 607 mm |
| Ivry-sur-Seine 2.9 km | same station | 26.8°C about the same | 2.5°C about the same | 654 mm |
| Créteil 3.6 km | same station | 26.8°C about the same | 2.5°C about the same | 654 mm |
Alfortville weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Joinville station; sunshine at Paris-Montsouris.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.9°C | 2.5°C | 5.2°C | 52 mm | 59 |
| February | 9.5°C | 2.5°C | 6.0°C | 47 mm | 84 |
| March | 13.7°C | 4.7°C | 9.2°C | 46 mm | 135 |
| April | 17.6°C | 7.1°C | 12.4°C | 45 mm | 177 |
| May | 21.0°C | 10.6°C | 15.8°C | 63 mm | 201 |
| June | 24.3°C | 13.9°C | 19.1°C | 54 mm | 204 |
| July | 26.8°C | 15.8°C | 21.3°C | 59 mm | 222 |
| August | 26.5°C | 15.6°C | 21.1°C | 56 mm | 215 |
| September | 22.5°C | 12.4°C | 17.4°C | 50 mm | 175 |
| October | 17.4°C | 9.3°C | 13.3°C | 56 mm | 119 |
| November | 11.7°C | 5.6°C | 8.7°C | 59 mm | 70 |
| December | 8.1°C | 3.1°C | 5.6°C | 66 mm | 57 |
| Year | 17.3°C | 8.6°C | 12.9°C | 654 mm | 1,717 |
Where Alfortville’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Joinville, 3.4 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, Paris-Montsouris, 6.4 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 Val-de-Marne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Alfortville’s climate
How warm does Alfortville get in summer?
July is the warmest month, with average highs of 26.8°C. About 71 days a year reach 25°C, more than 65% of mainland French towns, and about 21 reach 30°C.
How cold does Alfortville get in winter?
January nights average 2.5°C. The air drops to 0°C or below on about 31 nights a year, and about 2 days a year stay below freezing all day.
How much rain does Alfortville get?
About 654 mm a year, less than 82% of mainland French towns. December is the wettest month (66 mm) and April the driest (45 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Paris-Montsouris (6.4 km away), averages 1,717 hours of sunshine a year.
Are these figures for Alfortville itself?
No: they are the normals of the Météo-France station matched to Alfortville, Joinville, 3.4 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 JOINVILLE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Alfortville →
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.