Grangermont is drier than 94% of mainland French towns: 616 mm of rain a year
January nights here settle around 1.7°C. Wet weather is most frequent in May and least in March. Only about 53 days a year reach 25°C, fewer than in 64% of mainland French towns. An umbrella earns its place on about 111 days a year with 1 mm of rain or more.
These are the figures of Météo-France’s Boigneville station, 15 km north.
A year in Grangermont at a glance
Each month’s typical high and low in °C, at the Boigneville station.
What a year in Grangermont feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Boigneville.
About 616 mm of rain a year
May is the wettest month and March the driest. About 15 days a year bring 10 mm or more. 51st wettest of 53 towns of 2,500+ in Loiret.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Melun
46 frosts and 53 days of 25°C a year
On about 46 nights a year the air drops to 0°C or below, and on about 5 days it stays below freezing all day. About 53 days a year reach 25°C, and 14 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Boigneville: 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 Boigneville
Boigneville is 15 km north of Grangermont. Every figure on this page is the station’s, not a measurement in Grangermont itself.
| Station (Météo-France number) | Boigneville (91069001) |
| Distance from the town | 15 km north |
| Station altitude | 115 m |
| Town altitude (its center) | 124 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 Grangermont 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 Loiret.
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 |
|---|---|---|---|---|
| Grangermont | Boigneville | 26.0°C | 1.7°C | 616 mm |
| Puiseaux 3.7 km | same station | 26.0°C about the same | 1.7°C about the same | 616 mm |
| Le Malesherbois 11 km | same station | 26.0°C about the same | 1.7°C about the same | 616 mm |
| Pithiviers 13 km | same station | 26.0°C about the same | 1.7°C about the same | 616 mm |
| Saint-Pierre-lès-Nemours 21 km | Nemours | 26.7°C 0.7°C warmer | 1.7°C about the same | 690 mm |
| Château-Landon 21 km | Nemours | 26.7°C 0.7°C warmer | 1.7°C about the same | 690 mm |
| Nemours 22 km | Nemours | 26.7°C 0.7°C warmer | 1.7°C about the same | 690 mm |
Grangermont weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Boigneville station; sunshine at Melun.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.9°C | 1.7°C | 4.3°C | 48 mm | 60 |
| February | 8.2°C | 1.4°C | 4.8°C | 44 mm | 83 |
| March | 12.3°C | 3.3°C | 7.8°C | 43 mm | 143 |
| April | 15.9°C | 5.3°C | 10.6°C | 47 mm | 188 |
| May | 19.4°C | 8.7°C | 14.0°C | 63 mm | 216 |
| June | 22.9°C | 11.7°C | 17.3°C | 50 mm | 226 |
| July | 26.0°C | 13.6°C | 19.9°C | 51 mm | 235 |
| August | 25.8°C | 13.4°C | 19.6°C | 50 mm | 225 |
| September | 21.4°C | 10.4°C | 15.9°C | 50 mm | 180 |
| October | 16.1°C | 7.9°C | 12.0°C | 58 mm | 119 |
| November | 10.5°C | 4.4°C | 7.4°C | 54 mm | 68 |
| December | 7.2°C | 2.1°C | 4.6°C | 59 mm | 54 |
| Year | 16.1°C | 7.0°C | 11.5°C | 616 mm | 1,798 |
Where Grangermont’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Boigneville, 15 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 Loiret.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Grangermont’s climate
How warm does Grangermont get in summer?
July is the warmest month, with average highs of 26.0°C. About 53 days a year reach 25°C, fewer than 64% of mainland French towns, and about 14 reach 30°C.
How cold does Grangermont get in winter?
February nights average 1.4°C. The air drops to 0°C or below on about 46 nights a year, and about 5 days a year stay below freezing all day.
How much rain does Grangermont get?
About 616 mm a year, less than 94% of mainland French towns. May is the wettest month (63 mm) and March the driest (43 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 Grangermont itself?
No: they are the normals of the Météo-France station matched to Grangermont, Boigneville, 15 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 BOIGNEVILLE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Grangermont →
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.