Few mainland French towns get fewer days of 25 degrees or more than Grèges
On a normal January night the air cools to about 3.4°C. Only 18°C separates winter nights from summer afternoons. Frost is rarer than in 84% of mainland French towns: about 24 nights a year drop below freezing. Waterproofs come out on about 130 days a year, each with 1 mm of rain or more.
Figures from Météo-France’s Dieppe station, 4.2 km west.
A year in Grèges at a glance
Each month’s typical high and low in °C, at the Dieppe station.
What a year in Grèges feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Dieppe.
About 805 mm of rain a year
December is the wettest month and March the driest. About 22 days a year bring 10 mm or more. 49th wettest of 76 towns of 2,500+ in Seine-Maritime.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Rouen-Boos
24 frosts and 10 days of 25°C a year
On about 24 nights a year the air drops to 0°C or below, and on about 2 days it stays below freezing all day. About 10 days a year reach 25°C, and 2 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Dieppe: 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 Dieppe
Dieppe is 4.2 km west of Grèges. Every figure on this page is the station’s, not a measurement in Grèges itself.
| Station (Météo-France number) | Dieppe (76217001) |
| Distance from the town | 4.2 km west |
| Station altitude | 40 m |
| Town altitude (its center) | 94 m |
| Period | 1991–2020 |
| Sunshine measured at | Rouen-Boos, 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 Grèges 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-Maritime.
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 |
|---|---|---|---|---|
| Grèges | Dieppe | 20.5°C | 3.4°C | 805 mm |
| Dieppe 4.4 km | same station | 20.5°C about the same | 3.4°C about the same | 805 mm |
| Petit-Caux 6.8 km | same station | 20.5°C about the same | 3.4°C about the same | 805 mm |
| Saint-Nicolas-d'Aliermont 7.4 km | same station | 20.5°C about the same | 3.4°C about the same | 805 mm |
| Offranville 9.3 km | same station | 20.5°C about the same | 3.4°C about the same | 805 mm |
| Criel-sur-Mer 17 km | same station | 20.5°C about the same | 3.4°C about the same | 805 mm |
| Le Tréport 22 km | same station | 20.5°C about the same | 3.4°C about the same | 805 mm |
Grèges weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Dieppe station; sunshine at Rouen-Boos.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.9°C | 3.4°C | 5.6°C | 64 mm | 52 |
| February | 8.4°C | 3.2°C | 5.8°C | 56 mm | 77 |
| March | 10.6°C | 4.8°C | 7.7°C | 49 mm | 119 |
| April | 13.1°C | 6.3°C | 9.7°C | 52 mm | 165 |
| May | 15.8°C | 9.4°C | 12.6°C | 61 mm | 182 |
| June | 18.6°C | 12.3°C | 15.4°C | 55 mm | 197 |
| July | 20.5°C | 14.3°C | 17.4°C | 58 mm | 200 |
| August | 21.2°C | 14.5°C | 17.8°C | 70 mm | 190 |
| September | 19.3°C | 12.2°C | 15.8°C | 67 mm | 159 |
| October | 15.8°C | 9.8°C | 12.8°C | 90 mm | 108 |
| November | 11.5°C | 6.5°C | 9.0°C | 89 mm | 58 |
| December | 8.5°C | 4.0°C | 6.2°C | 94 mm | 49 |
| Year | 14.3°C | 8.4°C | 11.3°C | 805 mm | 1,554 |
Where Grèges’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Dieppe, 4.2 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, Rouen-Boos, 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 Seine-Maritime.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Grèges’s climate
How warm does Grèges get in summer?
August is the warmest month, with average highs of 21.2°C. About 10 days a year reach 25°C, fewer than almost every mainland French town, and about 2 reach 30°C.
How cold does Grèges get in winter?
February nights average 3.2°C. The air drops to 0°C or below on about 24 nights a year, and about 2 days a year stay below freezing all day.
How much rain does Grèges get?
About 805 mm a year, more than 61% of mainland French towns. December is the wettest month (94 mm) and March the driest (49 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Rouen-Boos (59 km away), averages 1,554 hours of sunshine a year.
Are these figures for Grèges itself?
No: they are the normals of the Météo-France station matched to Grèges, Dieppe, 4.2 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 DIEPPE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Grèges →
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.