In Sourdun, July heat, January chill and rainfall all sit near the middle of mainland French towns
A typical July afternoon reaches 25.6°C, a January night drops to 1.2°C, and 741 mm of rain falls in a year. Expect the heaviest rain in December and the lightest in April. Winter nights are cold: in January they are colder than in 70% of mainland French towns. Garden chairs stay out from May to September, the months with highs of 19–26°C.
Figures from Météo-France’s Voulton station, 8.5 km north.
A year in Sourdun at a glance
Each month’s typical high and low in °C, at the Voulton station.
What a year in Sourdun feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Voulton.
About 741 mm of rain a year
December is the wettest month and April the driest. About 21 days a year bring 10 mm or more. The wettest of 116 towns of 2,500+ in Seine-et-Marne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Melun
47 frosts and 51 days of 25°C a year
On about 47 nights a year the air drops to 0°C or below, and on about 7 days it stays below freezing all day. About 51 days a year reach 25°C, and 13 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Voulton: 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 Voulton
Voulton is 8.5 km north of Sourdun. Every figure on this page is the station’s, not a measurement in Sourdun itself.
| Station (Météo-France number) | Voulton (77530001) |
| Distance from the town | 8.5 km north |
| Station altitude | 175 m |
| Town altitude (its center) | 153 m |
| Period | 1991–2020 |
| Sunshine measured at | Melun, 50 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 Sourdun 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 Seine-et-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 |
|---|---|---|---|---|
| Sourdun | Voulton | 25.6°C | 1.2°C | 741 mm |
| Provins 4.8 km | same station | 25.6°C about the same | 1.2°C about the same | 741 mm |
| Nogent-sur-Seine 12 km | Bouy-sur-Orvin | 26.3°C 0.7°C warmer | 1.3°C about the same | 636 mm |
| Villenauxe-la-Grande 16 km | Romilly | 26.2°C 0.6°C warmer | 0.8°C about the same | 620 mm |
| Donnemarie-Dontilly 18 km | La Brosse-Mx | 26.4°C 0.8°C warmer | 2.0°C 0.8°C milder | 653 mm |
| Nangis 25 km | Nangis | 25.3°C about the same | 1.3°C about the same | 704 mm |
| Romilly-sur-Seine 28 km | Romilly | 26.2°C 0.6°C warmer | 0.8°C about the same | 620 mm |
Sourdun weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Voulton station; sunshine at Melun.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.0°C | 1.2°C | 3.6°C | 64 mm | 60 |
| February | 7.4°C | 1.3°C | 4.3°C | 57 mm | 83 |
| March | 11.7°C | 3.3°C | 7.5°C | 56 mm | 143 |
| April | 15.6°C | 5.4°C | 10.5°C | 52 mm | 188 |
| May | 19.2°C | 8.7°C | 14.0°C | 65 mm | 216 |
| June | 22.8°C | 11.7°C | 17.2°C | 57 mm | 226 |
| July | 25.6°C | 13.7°C | 19.6°C | 59 mm | 235 |
| August | 25.6°C | 13.6°C | 19.6°C | 55 mm | 225 |
| September | 21.2°C | 10.7°C | 16.0°C | 57 mm | 180 |
| October | 15.8°C | 8.1°C | 11.9°C | 70 mm | 119 |
| November | 9.9°C | 4.4°C | 7.1°C | 67 mm | 68 |
| December | 6.6°C | 2.0°C | 4.3°C | 83 mm | 54 |
| Year | 15.6°C | 7.0°C | 11.3°C | 741 mm | 1,798 |
Where Sourdun’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Voulton, 8.5 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, Melun, 50 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 Seine-et-Marne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Sourdun’s climate
How warm does Sourdun get in summer?
July is the warmest month, with average highs of 25.6°C. About 51 days a year reach 25°C, fewer than 68% of mainland French towns, and about 13 reach 30°C.
How cold does Sourdun get in winter?
January nights average 1.2°C. The air drops to 0°C or below on about 47 nights a year, and about 7 days a year stay below freezing all day.
How much rain does Sourdun get?
About 741 mm a year, less than 54% of mainland French towns. December is the wettest month (83 mm) and April the driest (52 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Melun (50 km away), averages 1,798 hours of sunshine a year.
Are these figures for Sourdun itself?
No: they are the normals of the Météo-France station matched to Sourdun, Voulton, 8.5 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 VOULTON_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Sourdun →
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.