Frosty mornings in Lailly outnumber those of 90% of mainland French towns
The warmest part of a July day comes in at 26.2°C on average. Rain is spread evenly through the year: the wettest month, December, gets little more than the driest, March. Wet days, with 1 mm of rain or more, come about 124 times a year.
These are the figures of Météo-France’s Flacy station, 8.1 km east.
A year in Lailly at a glance
Each month’s typical high and low in °C, at the Flacy station.
What a year in Lailly feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Flacy.
About 741 mm of rain a year
December is the wettest month and March the driest. About 19 days a year bring 10 mm or more. 6th wettest of 19 towns of 2,500+ in Yonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Troyes-Barberey
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 7 days it stays below freezing all day. About 61 days a year reach 25°C, and 19 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Flacy: 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 Flacy
Flacy is 8.1 km east of Lailly. Every figure on this page is the station’s, not a measurement in Lailly itself.
| Station (Météo-France number) | Flacy (89165001) |
| Distance from the town | 8.1 km east |
| Station altitude | 118 m |
| Town altitude (its center) | 132 m |
| Period | 1991–2020 |
| Sunshine measured at | Troyes-Barberey, 39 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 Lailly 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 Yonne.
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 |
|---|---|---|---|---|
| Lailly | Flacy | 26.2°C | 0.8°C | 741 mm |
| Aix-Villemaur-Pâlis 16 km | same station | 26.2°C about the same | 0.8°C about the same | 741 mm |
| Saint-Clément 16 km | Sens | 26.5°C about the same | 1.7°C 0.9°C milder | 645 mm |
| Sens 17 km | Sens | 26.5°C about the same | 1.7°C 0.9°C milder | 645 mm |
| Paron 20 km | Sens | 26.5°C about the same | 1.7°C 0.9°C milder | 645 mm |
| Pont-sur-Yonne 23 km | La Brosse-Mx | 26.4°C about the same | 2.0°C 1.2°C milder | 653 mm |
| Villeneuve-sur-Yonne 24 km | Sens | 26.5°C about the same | 1.7°C 0.9°C milder | 645 mm |
Lailly weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Flacy station; sunshine at Troyes-Barberey.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.7°C | 0.8°C | 3.8°C | 61 mm | 63 |
| February | 8.1°C | 0.5°C | 4.3°C | 55 mm | 90 |
| March | 12.3°C | 2.2°C | 7.2°C | 53 mm | 148 |
| April | 16.0°C | 3.8°C | 9.9°C | 58 mm | 190 |
| May | 20.0°C | 7.7°C | 13.8°C | 67 mm | 216 |
| June | 23.6°C | 10.9°C | 17.3°C | 63 mm | 231 |
| July | 26.2°C | 12.9°C | 19.6°C | 58 mm | 242 |
| August | 26.0°C | 12.7°C | 19.4°C | 62 mm | 232 |
| September | 21.6°C | 9.5°C | 15.5°C | 56 mm | 186 |
| October | 16.4°C | 7.3°C | 11.9°C | 70 mm | 125 |
| November | 10.6°C | 3.9°C | 7.3°C | 66 mm | 70 |
| December | 7.3°C | 1.7°C | 4.5°C | 72 mm | 57 |
| Year | 16.2°C | 6.2°C | 11.2°C | 741 mm | 1,851 |
Where Lailly’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Flacy, 8.1 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, Troyes-Barberey, 39 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 Yonne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Lailly’s climate
How warm does Lailly get in summer?
July is the warmest month, with average highs of 26.2°C. About 61 days a year reach 25°C, more than 51% of mainland French towns, and about 19 reach 30°C.
How cold does Lailly get in winter?
February nights average 0.5°C. The air drops to 0°C or below on about 68 nights a year, and about 7 days a year stay below freezing all day.
How much rain does Lailly get?
About 741 mm a year, less than 54% of mainland French towns. December is the wettest month (72 mm) and March the driest (53 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Troyes-Barberey (39 km away), averages 1,851 hours of sunshine a year.
Are these figures for Lailly itself?
No: they are the normals of the Météo-France station matched to Lailly, Flacy, 8.1 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 FLACY, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Lailly →
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.