Ergny has some of the coolest summers among mainland French towns
The depth of winter brings overnight lows near 1.6°C. Its yearly rainfall tops that of 89% of mainland French towns. A year here swings 21°C from midwinter lows to midsummer highs. Central heating does most of its work from November to April, in months below 10°C on average.
These are the figures of Météo-France’s Radinghem station, 10 km east.
A year in Ergny at a glance
Each month’s typical high and low in °C, at the Radinghem station.
What a year in Ergny feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Radinghem.
About 1,038 mm of rain a year
December is the wettest month and April the driest. About 34 days a year bring 10 mm or more. 19th wettest of 131 towns of 2,500+ in Pas-de-Calais.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Le-Touquet
39 frosts and 21 days of 25°C a year
On about 39 nights a year the air drops to 0°C or below, and on about 6 days it stays below freezing all day. About 21 days a year reach 25°C, and 4 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Radinghem: 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 Radinghem
Radinghem is 10 km east of Ergny. Every figure on this page is the station’s, not a measurement in Ergny itself.
| Station (Météo-France number) | Radinghem (62685001) |
| Distance from the town | 10 km east |
| Station altitude | 115 m |
| Town altitude (its center) | 107 m |
| Period | 1991–2020 |
| Sunshine measured at | Le-Touquet, 26 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 Ergny 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 Pas-de-Calais.
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 |
|---|---|---|---|---|
| Ergny | Radinghem | 22.0°C | 1.6°C | 1,038 mm |
| Desvres 14 km | Licques | 22.4°C about the same | 1.4°C about the same | 1,138 mm |
| Lumbres 17 km | Licques | 22.4°C about the same | 1.4°C about the same | 1,138 mm |
| Samer 17 km | Boulogne-Sem | 20.1°C 1.9°C cooler | 3.4°C 1.8°C milder | 825 mm |
| Wizernes 23 km | Watten | 23.7°C 1.7°C warmer | 2.0°C about the same | 823 mm |
| Hesdin-la-Forêt 23 km | same station | 22.0°C about the same | 1.6°C about the same | 1,038 mm |
| Étaples 25 km | Le-Touquet | 21.4°C 0.6°C cooler | 2.6°C 1°C milder | 889 mm |
Ergny weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Radinghem station; sunshine at Le-Touquet.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.4°C | 1.6°C | 4.0°C | 98 mm | 62 |
| February | 7.1°C | 1.6°C | 4.4°C | 85 mm | 78 |
| March | 10.2°C | 3.3°C | 6.8°C | 72 mm | 133 |
| April | 13.8°C | 5.0°C | 9.4°C | 60 mm | 190 |
| May | 16.8°C | 8.0°C | 12.4°C | 70 mm | 210 |
| June | 19.6°C | 10.8°C | 15.2°C | 70 mm | 220 |
| July | 22.0°C | 12.9°C | 17.4°C | 73 mm | 225 |
| August | 22.2°C | 13.1°C | 17.7°C | 84 mm | 205 |
| September | 19.0°C | 10.8°C | 14.9°C | 77 mm | 161 |
| October | 14.7°C | 8.1°C | 11.4°C | 108 mm | 111 |
| November | 9.9°C | 4.8°C | 7.4°C | 119 mm | 63 |
| December | 6.9°C | 2.2°C | 4.5°C | 124 mm | 53 |
| Year | 14.0°C | 6.8°C | 10.5°C | 1,038 mm | 1,710 |
Where Ergny’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Radinghem, 10 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, Le-Touquet, 26 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 Pas-de-Calais.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Ergny’s climate
How warm does Ergny get in summer?
August is the warmest month, with average highs of 22.2°C. About 21 days a year reach 25°C, fewer than 95% of mainland French towns, and about 4 reach 30°C.
How cold does Ergny get in winter?
January nights average 1.6°C. The air drops to 0°C or below on about 39 nights a year, and about 6 days a year stay below freezing all day.
How much rain does Ergny get?
About 1,038 mm a year, more than 89% of mainland French towns. December is the wettest month (124 mm) and April the driest (60 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Le-Touquet (26 km away), averages 1,710 hours of sunshine a year.
Are these figures for Ergny itself?
No: they are the normals of the Météo-France station matched to Ergny, Radinghem, 10 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 RADINGHEM, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Ergny →
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.