Less rain falls on Massy than on 91% of mainland French towns: 622 mm a year
About 622 mm of rain falls in a typical year; July afternoons reach 25.8°C and January nights drop to 2.1°C. Rain is spread evenly through the year: the wettest month, May, gets little more than the driest, February. Only about 54 days a year reach 25°C, fewer than in 63% of mainland French towns. Figures from Météo-France’s Orly station, 9.3 km east.
A year in Massy at a glance
Each month’s typical high and low in °C, at the Orly station.
What a year in Massy feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Orly.
About 622 mm of rain a year
May is the wettest month and February the driest. About 15 days a year bring 10 mm or more. 71st wettest of 96 towns of 2,500+ in Essonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Orly
36 frosts and 54 days of 25°C a year
On about 36 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 54 days a year reach 25°C, and 13 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Orly: 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 Orly
Orly is 9.3 km east of Massy. Every figure on this page is the station’s, not a measurement in Massy itself.
| Station (Météo-France number) | Orly (91027002) |
| Distance from the town | 9.3 km east |
| Station altitude | 86 m |
| Town altitude (its center) | 73 m |
| Period | 1991–2020 |
| Nearest station of any kind | 8 km |
| Sunshine measured at | the same station |
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 Massy 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 Essonne.
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 |
|---|---|---|---|---|
| Massy | Orly | 25.8°C | 2.1°C | 622 mm |
| Verrières-le-Buisson 1.8 km | same station | 25.8°C about the same | 2.1°C about the same | 622 mm |
| Champlan 2.6 km | same station | 25.8°C about the same | 2.1°C about the same | 622 mm |
| Palaiseau 3 km | Gometz-le-Chat. | 25.2°C 0.6°C cooler | 1.5°C 0.6°C colder | 735 mm |
| Antony 3 km | Choisy-le-Roi | 26.2°C about the same | 2.8°C 0.7°C milder | 607 mm |
| Igny 3.5 km | Paris-Montsouris | 25.7°C about the same | 3.2°C 1.1°C milder | 634 mm |
| Wissous 4 km | same station | 25.8°C about the same | 2.1°C about the same | 622 mm |
Massy weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Orly station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.2°C | 2.1°C | 4.7°C | 47 mm | 53 |
| February | 8.5°C | 2.0°C | 5.2°C | 43 mm | 85 |
| March | 12.5°C | 4.2°C | 8.3°C | 44 mm | 153 |
| April | 16.2°C | 6.4°C | 11.3°C | 45 mm | 203 |
| May | 19.8°C | 9.9°C | 14.8°C | 63 mm | 217 |
| June | 23.2°C | 13.1°C | 18.2°C | 56 mm | 224 |
| July | 25.8°C | 15.0°C | 20.4°C | 53 mm | 247 |
| August | 25.7°C | 14.6°C | 20.2°C | 58 mm | 221 |
| September | 21.5°C | 11.5°C | 16.5°C | 47 mm | 186 |
| October | 16.4°C | 8.7°C | 12.6°C | 53 mm | 117 |
| November | 10.9°C | 5.0°C | 7.9°C | 53 mm | 62 |
| December | 7.6°C | 2.7°C | 5.2°C | 60 mm | 64 |
| Year | 16.3°C | 7.9°C | 12.1°C | 622 mm | 1,831 |
Where Massy’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Orly, 9.3 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, Orly, 9.3 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 Essonne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Massy’s climate
How warm does Massy get in summer?
July is the warmest month, with average highs of 25.8°C. About 54 days a year reach 25°C, fewer than 63% of mainland French towns, and about 13 reach 30°C.
How cold does Massy get in winter?
February nights average 2.0°C. The air drops to 0°C or below on about 36 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Massy get?
About 622 mm a year, less than 91% of mainland French towns. May is the wettest month (63 mm) and February the driest (43 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Orly (9.3 km away), averages 1,831 hours of sunshine a year.
Are these figures for Massy itself?
No: they are the normals of the Météo-France station matched to Massy, Orly, 9.3 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 ORLY, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Massy →
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.