Less rain falls on Ormesson than on 73% of mainland French towns: 690 mm a year
On a normal July day the thermometer tops out near 26.7°C. About 50 nights a year bring a frost, more than in 70% of mainland French towns. Wet weather is most frequent in October and least in March. Gritters and ice scrapers earn their keep on roughly 50 nights a year below 0°C.
These are the figures of Météo-France’s Nemours station, 5.4 km north-east.
A year in Ormesson at a glance
Each month’s typical high and low in °C, at the Nemours station.
What a year in Ormesson feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Nemours.
About 690 mm of rain a year
October is the wettest month and March the driest. About 17 days a year bring 10 mm or more. 84th wettest of 116 towns of 2,500+ in Seine-et-Marne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Melun
A frosty town: 50 frosts and 65 days of 25°C a year
On about 50 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 65 days a year reach 25°C, and 19 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Nemours: 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 Nemours
Nemours is 5.4 km north-east of Ormesson. Every figure on this page is the station’s, not a measurement in Ormesson itself.
| Station (Météo-France number) | Nemours (77333003) |
| Distance from the town | 5.4 km north-east |
| Station altitude | 73 m |
| Town altitude (its center) | 106 m |
| Period | 1991–2020 |
| Nearest station of any kind | 2.1 km |
| Sunshine measured at | Melun, 41 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 Ormesson 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 |
|---|---|---|---|---|
| Ormesson | Nemours | 26.7°C | 1.7°C | 690 mm |
| Saint-Pierre-lès-Nemours 3.4 km | same station | 26.7°C about the same | 1.7°C about the same | 690 mm |
| Nemours 4.4 km | same station | 26.7°C about the same | 1.7°C about the same | 690 mm |
| Souppes-sur-Loing 9.4 km | same station | 26.7°C about the same | 1.7°C about the same | 690 mm |
| Château-Landon 11 km | same station | 26.7°C about the same | 1.7°C about the same | 690 mm |
| Bourron-Marlotte 11 km | same station | 26.7°C about the same | 1.7°C about the same | 690 mm |
| Montigny-sur-Loing 12 km | same station | 26.7°C about the same | 1.7°C about the same | 690 mm |
Ormesson weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Nemours station; sunshine at Melun.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.3°C | 1.7°C | 4.5°C | 52 mm | 60 |
| February | 8.8°C | 1.4°C | 5.1°C | 50 mm | 83 |
| March | 13.0°C | 3.3°C | 8.2°C | 49 mm | 143 |
| April | 16.7°C | 5.3°C | 11.0°C | 53 mm | 188 |
| May | 20.4°C | 9.0°C | 14.7°C | 63 mm | 216 |
| June | 24.0°C | 12.1°C | 18.1°C | 59 mm | 226 |
| July | 26.7°C | 14.1°C | 20.4°C | 54 mm | 235 |
| August | 26.5°C | 13.8°C | 20.1°C | 58 mm | 225 |
| September | 22.2°C | 10.5°C | 16.4°C | 55 mm | 180 |
| October | 17.0°C | 8.2°C | 12.6°C | 68 mm | 119 |
| November | 11.1°C | 4.6°C | 7.9°C | 64 mm | 68 |
| December | 7.8°C | 2.3°C | 5.0°C | 65 mm | 54 |
| Year | 16.8°C | 7.2°C | 12.0°C | 690 mm | 1,798 |
Where Ormesson’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Nemours, 5.4 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, Melun, 41 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 Ormesson’s climate
How warm does Ormesson get in summer?
July is the warmest month, with average highs of 26.7°C. About 65 days a year reach 25°C, more than 56% of mainland French towns, and about 19 reach 30°C.
How cold does Ormesson get in winter?
February nights average 1.4°C. The air drops to 0°C or below on about 50 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Ormesson get?
About 690 mm a year, less than 73% of mainland French towns. October is the wettest month (68 mm) and March the driest (49 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Melun (41 km away), averages 1,798 hours of sunshine a year.
Are these figures for Ormesson itself?
No: they are the normals of the Météo-France station matched to Ormesson, Nemours, 5.4 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 NEMOURS, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Ormesson →
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.