Rainfall in Gron trails that of 84% of mainland French towns: 645 mm a year
High summer brings afternoon highs near 26.5°C. October is the wettest month, March the driest. Frosty nights outnumber those of 65% of mainland French towns. An umbrella earns its place on about 113 days a year with 1 mm of rain or more.
Figures from Météo-France’s Sens station, 2.4 km north-east.
A year in Gron at a glance
Each month’s typical high and low in °C, at the Sens station.
What a year in Gron feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Sens.
About 645 mm of rain a year
October is the wettest month and March the driest. About 16 days a year bring 10 mm or more. 16th wettest of 19 towns of 2,500+ in Yonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Troyes-Barberey
47 frosts and 63 days of 25°C a year
On about 47 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 63 days a year reach 25°C, and 18 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Sens: 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 Sens
Sens is 2.4 km north-east of Gron. Every figure on this page is the station’s, not a measurement in Gron itself.
| Station (Météo-France number) | Sens (89387002) |
| Distance from the town | 2.4 km north-east |
| Station altitude | 70 m |
| Town altitude (its center) | 90 m |
| Period | 1991–2020 |
| Sunshine measured at | Troyes-Barberey, 59 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 Gron 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 |
|---|---|---|---|---|
| Gron | Sens | 26.5°C | 1.7°C | 645 mm |
| Paron 3.2 km | same station | 26.5°C about the same | 1.7°C about the same | 645 mm |
| Sens 4.9 km | same station | 26.5°C about the same | 1.7°C about the same | 645 mm |
| Saint-Clément 7.1 km | same station | 26.5°C about the same | 1.7°C about the same | 645 mm |
| Villeneuve-sur-Yonne 8.8 km | same station | 26.5°C about the same | 1.7°C about the same | 645 mm |
| Pont-sur-Yonne 15 km | La Brosse-Mx | 26.4°C about the same | 2.0°C about the same | 653 mm |
| Courtenay 21 km | Savigny/Clairis | 25.6°C 0.9°C cooler | 1.4°C about the same | 732 mm |
Gron weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Sens station; sunshine at Troyes-Barberey.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.2°C | 1.7°C | 4.4°C | 51 mm | 63 |
| February | 8.7°C | 1.4°C | 5.1°C | 48 mm | 90 |
| March | 12.9°C | 3.3°C | 8.1°C | 46 mm | 148 |
| April | 16.5°C | 5.3°C | 10.9°C | 53 mm | 190 |
| May | 20.2°C | 9.1°C | 14.7°C | 60 mm | 216 |
| June | 23.8°C | 12.2°C | 18.0°C | 52 mm | 231 |
| July | 26.5°C | 14.0°C | 20.2°C | 56 mm | 242 |
| August | 26.4°C | 13.7°C | 20.1°C | 48 mm | 232 |
| September | 22.1°C | 10.5°C | 16.3°C | 51 mm | 186 |
| October | 17.1°C | 8.1°C | 12.6°C | 63 mm | 125 |
| November | 11.1°C | 4.6°C | 7.9°C | 56 mm | 70 |
| December | 7.7°C | 2.3°C | 5.0°C | 62 mm | 57 |
| Year | 16.7°C | 7.2°C | 11.9°C | 645 mm | 1,851 |
Where Gron’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Sens, 2.4 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, Troyes-Barberey, 59 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 Gron’s climate
How warm does Gron get in summer?
July is the warmest month, with average highs of 26.5°C. About 63 days a year reach 25°C, more than 53% of mainland French towns, and about 18 reach 30°C.
How cold does Gron get in winter?
February nights average 1.4°C. The air drops to 0°C or below on about 47 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Gron get?
About 645 mm a year, less than 84% of mainland French towns. October is the wettest month (63 mm) and March the driest (46 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Troyes-Barberey (59 km away), averages 1,851 hours of sunshine a year.
Are these figures for Gron itself?
No: they are the normals of the Météo-France station matched to Gron, Sens, 2.4 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 SENS, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Gron →
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.