Hardly any mainland French towns collect more rain than Asco: 1,181 mm a year
January nights here settle around 0.7°C. November is the wettest month here, with about 8.6 times the rain of July. None of the 16 towns of 2,500+ in Haute-Corse has colder January nights. Expect about 48 frosty starts a year, nights when the air falls below freezing.
These are the figures of Météo-France’s Renno station, 35 km south-west; at that distance they describe the area more than the town.
A year in Asco at a glance
Each month’s typical high and low in °C, at the Renno station.
What a year in Asco feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Renno.
About 1,181 mm of rain a year
November is the wettest month and July the driest. About 37 days a year bring 10 mm or more. The wettest of 16 towns of 2,500+ in Haute-Corse.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Calvi
48 frosts and 64 days of 25°C a year
On about 48 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 64 days a year reach 25°C, and 12 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Renno: 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 Renno
Renno is 35 km south-west of Asco. Every figure on this page is the station’s, not a measurement in Asco itself.
| Station (Météo-France number) | Renno (20258001) |
| Distance from the town | 35 km south-west |
| Station altitude | 755 m |
| Town altitude (its center) | 688 m |
| Period | 1993–2020 (the station’s own record) |
| Nearest station of any kind | 21 km |
| Sunshine measured at | Calvi, 21 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 Asco 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-Corse.
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 |
|---|---|---|---|---|
| Asco | Renno | 26.4°C | 0.7°C | 1,181 mm |
| Calenzana 17 km | Calvi | 30.2°C 3.8°C warmer | 5.0°C 4.3°C milder | 653 mm |
| Corte 19 km | Corte | 31.2°C 4.8°C warmer | 0.4°C about the same | 824 mm |
| L'Île-Rousse 21 km | Île Rousse | 27.6°C 1.2°C warmer | 8.4°C 7.7°C milder | 474 mm |
| Calvi 25 km | Calvi | 30.2°C 3.8°C warmer | 5.0°C 4.3°C milder | 653 mm |
Asco weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Renno station; sunshine at Calvi.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.2°C | 0.7°C | 4.9°C | 122 mm | 133 |
| February | 9.6°C | 0.4°C | 5.0°C | 103 mm | 150 |
| March | 12.2°C | 2.2°C | 7.2°C | 100 mm | 205 |
| April | 14.8°C | 4.6°C | 9.7°C | 106 mm | 238 |
| May | 18.8°C | 8.0°C | 13.4°C | 89 mm | 296 |
| June | 23.3°C | 11.0°C | 17.1°C | 42 mm | 331 |
| July | 26.4°C | 12.9°C | 19.7°C | 22 mm | 371 |
| August | 26.8°C | 13.3°C | 20.1°C | 34 mm | 331 |
| September | 22.2°C | 10.5°C | 16.3°C | 93 mm | 247 |
| October | 18.6°C | 7.9°C | 13.3°C | 124 mm | 190 |
| November | 13.2°C | 4.5°C | 8.9°C | 191 mm | 132 |
| December | 10.0°C | 1.7°C | 5.8°C | 154 mm | 123 |
| Year | 17.1°C | 6.5°C | 11.8°C | 1,181 mm | 2,746 |
Where Asco’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Renno, 35 km away: statistics for 1991–2020 (the station’s own years, 1993–2020, 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, Calvi, 21 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-Corse.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Asco’s climate
How warm does Asco get in summer?
August is the warmest month, with average highs of 26.8°C. About 64 days a year reach 25°C, more than 55% of mainland French towns, and about 12 reach 30°C.
How cold does Asco get in winter?
February nights average 0.4°C. The air drops to 0°C or below on about 48 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Asco get?
About 1,181 mm a year, more than 96% of mainland French towns. November is the wettest month (191 mm) and July the driest (22 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Calvi (21 km away), averages 2,746 hours of sunshine a year.
Are these figures for Asco itself?
No: they are the normals of the Météo-France station matched to Asco, Renno, 35 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 RENNO, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Asco →
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.