Ice on the ground: Montigny-l'Allier sees more frosts than 90% of mainland French towns
Sunny July days climb to about 25.9°C. Of all months, December brings the most rain and April the least. By rainfall alone, it ranks drier than 61% of mainland French towns. For walks and days out, the stretch from June to September brings highs of 22–26°C.
These are the figures of Météo-France’s Ussy-sur-Marne station, 16 km south.
A year in Montigny-l'Allier at a glance
Each month’s typical high and low in °C, at the Ussy-sur-Marne station.
What a year in Montigny-l'Allier feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Ussy-sur-Marne.
About 727 mm of rain a year
December is the wettest month and April the driest. About 19 days a year bring 10 mm or more. 9th wettest of 24 towns of 2,500+ in Aisne.
Rain by month
Millimeters
A frosty town: 68 frosts and 61 days of 25°C a year
On about 68 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 61 days a year reach 25°C, and 17 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Ussy-sur-Marne: 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 Ussy-sur-Marne
Ussy-sur-Marne is 16 km south of Montigny-l'Allier. Every figure on this page is the station’s, not a measurement in Montigny-l'Allier itself.
| Station (Météo-France number) | Ussy-sur-Marne (77478001) |
| Distance from the town | 16 km south |
| Station altitude | 69 m |
| Town altitude (its center) | 70 m |
| Period | 1991–2020 |
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 Montigny-l'Allier 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 Aisne.
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 |
|---|---|---|---|---|
| Montigny-l'Allier | Ussy-sur-Marne | 25.9°C | 0.9°C | 727 mm |
| Lizy-sur-Ourcq 11 km | same station | 25.9°C about the same | 0.9°C about the same | 727 mm |
| Villers-Cotterêts 15 km | Margny-lès-Compiègne | 24.7°C 1.2°C cooler | 1.5°C 0.6°C milder | 634 mm |
| La Ferté-sous-Jouarre 18 km | same station | 25.9°C about the same | 0.9°C about the same | 727 mm |
| Crépy-en-Valois 20 km | Margny-lès-Compiègne | 24.7°C 1.2°C cooler | 1.5°C 0.6°C milder | 634 mm |
| Trilport 20 km | same station | 25.9°C about the same | 0.9°C about the same | 727 mm |
| Charly-sur-Marne 20 km | Saint-Cyr/Morin-Bg | 25.5°C about the same | 1.0°C about the same | 815 mm |
Montigny-l'Allier weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Ussy-sur-Marne station.
| Month | High | Low | Mean | Rain |
|---|---|---|---|---|
| January | 7.1°C | 0.9°C | 4.0°C | 62 mm |
| February | 8.4°C | 0.7°C | 4.5°C | 54 mm |
| March | 12.7°C | 2.4°C | 7.6°C | 50 mm |
| April | 16.5°C | 4.0°C | 10.3°C | 48 mm |
| May | 20.1°C | 7.7°C | 13.9°C | 67 mm |
| June | 23.3°C | 10.6°C | 17.0°C | 59 mm |
| July | 25.9°C | 12.6°C | 19.2°C | 66 mm |
| August | 25.8°C | 12.2°C | 19.0°C | 62 mm |
| September | 21.8°C | 9.3°C | 15.6°C | 52 mm |
| October | 16.7°C | 7.3°C | 12.0°C | 63 mm |
| November | 10.9°C | 3.9°C | 7.4°C | 63 mm |
| December | 7.6°C | 1.5°C | 4.6°C | 80 mm |
| Year | 16.4°C | 6.1°C | 11.3°C | 727 mm |
Where Montigny-l'Allier’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Ussy-sur-Marne, 16 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.
- Comparisons: every town of 2,500 or more in mainland France, read the same way; the dots are the towns of 2,500+ in Aisne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Montigny-l'Allier’s climate
How warm does Montigny-l'Allier get in summer?
July is the warmest month, with average highs of 25.9°C. About 61 days a year reach 25°C, more than 51% of mainland French towns, and about 17 reach 30°C.
How cold does Montigny-l'Allier get in winter?
February nights average 0.7°C. The air drops to 0°C or below on about 68 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Montigny-l'Allier get?
About 727 mm a year, less than 61% of mainland French towns. December is the wettest month (80 mm) and April the driest (48 mm).
Are these figures for Montigny-l'Allier itself?
No: they are the normals of the Météo-France station matched to Montigny-l'Allier, Ussy-sur-Marne, 16 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 USSY-SUR-MARNE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Montigny-l'Allier →
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.