Winter nights in Illtal are colder than in 93% of mainland French towns
Peak summer warmth arrives in July, with afternoons near 26.4°C. Rain peaks in May and eases off in February. Central heating does most of its work from November to March, in months below 10°C on average.
These are the figures of Météo-France’s Bale-Mulhouse station, 17 km east.
A year in Illtal at a glance
Each month’s typical high and low in °C, at the Bale-Mulhouse station.
What a year in Illtal feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Bale-Mulhouse.
About 764 mm of rain a year
May is the wettest month and February the driest. About 22 days a year bring 10 mm or more. 11th wettest of 52 towns of 2,500+ in Haut-Rhin.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Bale-Mulhouse
A frosty town: 70 frosts and 66 days of 25°C a year
On about 70 nights a year the air drops to 0°C or below, and on about 10 days it stays below freezing all day. About 66 days a year reach 25°C, and 19 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Bale-Mulhouse: 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 Bale-Mulhouse
Bale-Mulhouse is 17 km east of Illtal. Every figure on this page is the station’s, not a measurement in Illtal itself.
| Station (Météo-France number) | Bale-Mulhouse (68297001) |
| Distance from the town | 17 km east |
| Station altitude | 263 m |
| Town altitude (its center) | 338 m |
| Period | 1991–2020 |
| Nearest station of any kind | 10 km |
| Sunshine measured at | the same station |
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 Illtal 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 Haut-Rhin.
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 |
|---|---|---|---|---|
| Illtal | Bale-Mulhouse | 26.4°C | −0.8°C | 764 mm |
| Altkirch 7.9 km | Mulhouse | 26.4°C about the same | −0.6°C about the same | 748 mm |
| Zillisheim 15 km | Mulhouse | 26.4°C about the same | −0.6°C about the same | 748 mm |
| Sierentz 16 km | same station | 26.4°C about the same | −0.8°C about the same | 764 mm |
| Blotzheim 16 km | same station | 26.4°C about the same | −0.8°C about the same | 764 mm |
| Bartenheim 16 km | same station | 26.4°C about the same | −0.8°C about the same | 764 mm |
| Hésingue 17 km | same station | 26.4°C about the same | −0.8°C about the same | 764 mm |
Illtal weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Bale-Mulhouse station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 5.5°C | −0.8°C | 2.3°C | 46 mm | 68 |
| February | 7.4°C | −0.6°C | 3.4°C | 44 mm | 91 |
| March | 12.1°C | 1.9°C | 7.0°C | 47 mm | 146 |
| April | 16.5°C | 4.9°C | 10.7°C | 58 mm | 181 |
| May | 20.4°C | 9.3°C | 14.8°C | 87 mm | 202 |
| June | 24.2°C | 12.7°C | 18.5°C | 75 mm | 228 |
| July | 26.4°C | 14.2°C | 20.3°C | 72 mm | 248 |
| August | 26.1°C | 14.0°C | 20.0°C | 80 mm | 234 |
| September | 21.4°C | 10.2°C | 15.8°C | 64 mm | 168 |
| October | 16.0°C | 6.9°C | 11.4°C | 69 mm | 121 |
| November | 9.7°C | 2.8°C | 6.2°C | 61 mm | 70 |
| December | 6.1°C | 0.1°C | 3.1°C | 63 mm | 62 |
| Year | 16.0°C | 6.3°C | 11.1°C | 764 mm | 1,819 |
Where Illtal’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Bale-Mulhouse, 17 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, Bale-Mulhouse, 17 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 Haut-Rhin.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Illtal’s climate
How warm does Illtal get in summer?
July is the warmest month, with average highs of 26.4°C. About 66 days a year reach 25°C, more than 56% of mainland French towns, and about 19 reach 30°C.
How cold does Illtal get in winter?
January nights average −0.8°C. The air drops to 0°C or below on about 70 nights a year, and about 10 days a year stay below freezing all day.
How much rain does Illtal get?
About 764 mm a year, more than 53% of mainland French towns. May is the wettest month (87 mm) and February the driest (44 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Bale-Mulhouse (17 km away), averages 1,819 hours of sunshine a year.
Are these figures for Illtal itself?
No: they are the normals of the Météo-France station matched to Illtal, Bale-Mulhouse, 17 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 BALE-MULHOUSE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Illtal →
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.