Wet weather: 1,086 mm a year falls on Semilly, more than on 90% of mainland French towns
Peak summer warmth arrives in July, with afternoons near 24.6°C. Winter nights are cold: in January they are colder than in 89% of mainland French towns. Expect the heaviest rain in December and the lightest in April. Warm coats and heating bills mark the months from November to April, when means dip under 10°C.
These are the figures of Météo-France’s Busson station, 11 km north-west.
A year in Semilly at a glance
Each month’s typical high and low in °C, at the Busson station.
What a year in Semilly feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Busson.
About 1,086 mm of rain a year
December is the wettest month and April the driest. About 36 days a year bring 10 mm or more. The wettest of 6 towns of 2,500+ in Haute-Marne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Lignéville
A frosty town: 67 frosts and 43 days of 25°C a year
On about 67 nights a year the air drops to 0°C or below, and on about 13 days it stays below freezing all day. About 43 days a year reach 25°C, and 9 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Busson: 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 Busson
Busson is 11 km north-west of Semilly. Every figure on this page is the station’s, not a measurement in Semilly itself.
| Station (Météo-France number) | Busson (52084002) |
| Distance from the town | 11 km north-west |
| Station altitude | 387 m |
| Town altitude (its center) | 354 m |
| Period | 1992–2020 (the station’s own record) |
| Sunshine measured at | Lignéville, 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 Semilly 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 Haute-Marne.
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 |
|---|---|---|---|---|
| Semilly | Busson | 24.6°C | −0.4°C | 1,086 mm |
| Neufchâteau 20 km | Cirfontaines | 24.7°C about the same | −0.4°C about the same | 904 mm |
| Nogent 27 km | Is-en-Bassigny | 24.7°C about the same | −0.8°C about the same | 874 mm |
Semilly weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Busson station; sunshine at Lignéville.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 4.5°C | −0.4°C | 2.0°C | 105 mm | 58 |
| February | 6.1°C | −0.2°C | 2.9°C | 89 mm | 85 |
| March | 10.4°C | 1.8°C | 6.1°C | 83 mm | 163 |
| April | 14.5°C | 4.1°C | 9.3°C | 71 mm | 201 |
| May | 18.5°C | 7.7°C | 13.1°C | 93 mm | 216 |
| June | 22.3°C | 10.8°C | 16.5°C | 74 mm | 236 |
| July | 24.6°C | 12.9°C | 18.7°C | 80 mm | 252 |
| August | 24.1°C | 13.1°C | 18.6°C | 90 mm | 222 |
| September | 19.5°C | 9.8°C | 14.7°C | 81 mm | 191 |
| October | 14.4°C | 7.1°C | 10.7°C | 99 mm | 115 |
| November | 8.5°C | 3.1°C | 5.8°C | 106 mm | 63 |
| December | 5.2°C | 0.6°C | 2.9°C | 114 mm | 47 |
| Year | 14.4°C | 5.9°C | 10.1°C | 1,086 mm | 1,848 |
Where Semilly’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Busson, 11 km away: statistics for 1991–2020 (the station’s own years, 1992–2020, where its record is shorter).
- 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, Lignéville, 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 Haute-Marne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Semilly’s climate
How warm does Semilly get in summer?
July is the warmest month, with average highs of 24.6°C. About 43 days a year reach 25°C, fewer than 78% of mainland French towns, and about 9 reach 30°C.
How cold does Semilly get in winter?
January nights average −0.4°C. The air drops to 0°C or below on about 67 nights a year, and about 13 days a year stay below freezing all day.
How much rain does Semilly get?
About 1,086 mm a year, more than 90% of mainland French towns. December is the wettest month (114 mm) and April the driest (71 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Lignéville (39 km away), averages 1,848 hours of sunshine a year.
Are these figures for Semilly itself?
No: they are the normals of the Météo-France station matched to Semilly, Busson, 11 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 BUSSON_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Semilly →
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.