Ice on the ground: Lançon sees more frosts than 82% of mainland French towns
July afternoons average 25.3°C. Days of 25°C are scarce: about 50 a year, fewer than in 68% of mainland French towns. Of all months, December brings the most rain and April the least. From June to September, highs of 21–25°C make it easy to spend the day outdoors.
These are the figures of Météo-France’s Sommepy station, 23 km west.
A year in Lançon at a glance
Each month’s typical high and low in °C, at the Sommepy station.
What a year in Lançon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Sommepy.
About 771 mm of rain a year
December is the wettest month and April the driest. About 21 days a year bring 10 mm or more. 12th wettest of 13 towns of 2,500+ in Ardennes.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Charleville-Mez
A frosty town: 62 frosts and 50 days of 25°C a year
On about 62 nights a year the air drops to 0°C or below, and on about 6 days it stays below freezing all day. About 50 days a year reach 25°C, and 12 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Sommepy: 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 Sommepy
Sommepy is 23 km west of Lançon. Every figure on this page is the station’s, not a measurement in Lançon itself.
| Station (Météo-France number) | Sommepy (51544002) |
| Distance from the town | 23 km west |
| Station altitude | 140 m |
| Town altitude (its center) | 115 m |
| Period | 1991–2020 |
| Nearest station of any kind | 4.9 km |
| Sunshine measured at | Charleville-Mez, 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 Lançon 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 Ardennes.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Lançon | Sommepy | 25.3°C | 0.5°C | 771 mm |
| Vouziers 19 km | Cauroy | 25.3°C about the same | 0.3°C about the same | 750 mm |
| Sainte-Menehould 21 km | Somme-Vesle | 25.3°C about the same | 0.1°C about the same | 782 mm |
Lançon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Sommepy station; sunshine at Charleville-Mez.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.0°C | 0.5°C | 3.3°C | 66 mm | 50 |
| February | 7.5°C | 0.5°C | 4.0°C | 58 mm | 69 |
| March | 11.8°C | 2.3°C | 7.0°C | 58 mm | 128 |
| April | 15.8°C | 4.2°C | 10.0°C | 52 mm | 177 |
| May | 19.6°C | 7.9°C | 13.8°C | 67 mm | 197 |
| June | 22.9°C | 10.8°C | 16.8°C | 63 mm | 203 |
| July | 25.3°C | 12.6°C | 19.0°C | 65 mm | 214 |
| August | 25.1°C | 12.5°C | 18.8°C | 67 mm | 199 |
| September | 20.9°C | 9.5°C | 15.2°C | 58 mm | 153 |
| October | 15.7°C | 7.3°C | 11.5°C | 66 mm | 97 |
| November | 9.9°C | 3.9°C | 6.9°C | 67 mm | 48 |
| December | 6.6°C | 1.5°C | 4.0°C | 85 mm | 41 |
| Year | 15.6°C | 6.1°C | 10.9°C | 771 mm | 1,576 |
Where Lançon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Sommepy, 23 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, Charleville-Mez, 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 Ardennes.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Lançon’s climate
How warm does Lançon get in summer?
July is the warmest month, with average highs of 25.3°C. About 50 days a year reach 25°C, fewer than 68% of mainland French towns, and about 12 reach 30°C.
How cold does Lançon get in winter?
January nights average 0.5°C. The air drops to 0°C or below on about 62 nights a year, and about 6 days a year stay below freezing all day.
How much rain does Lançon get?
About 771 mm a year, more than 53% of mainland French towns. December is the wettest month (85 mm) and April the driest (52 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Charleville-Mez (59 km away), averages 1,576 hours of sunshine a year.
Are these figures for Lançon itself?
No: they are the normals of the Météo-France station matched to Lançon, Sommepy, 23 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 SOMMEPY, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Lançon →
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.