Winter nights in Ostheim are colder than in 92% of mainland French towns
Peak summer warmth arrives in July, with afternoons near 26.8°C. A year here swings 28°C from midwinter lows to midsummer highs. It is a dry place: less rain falls here than on 67% of mainland French towns. Waterproofs come out on about 116 days a year, each with 1 mm of rain or more.
These are the figures of Météo-France’s Ribeau. - Acaci station, 4.2 km north-west.
A year in Ostheim at a glance
Each month’s typical high and low in °C, at the Ribeau. - Acaci station.
What a year in Ostheim feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Ribeau. - Acaci.
About 699 mm of rain a year
May is the wettest month and March the driest. About 19 days a year bring 10 mm or more. 40th wettest of 52 towns of 2,500+ in Haut-Rhin.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Colmar-Meyenheim
A frosty town: 63 frosts and 73 days of 25°C a year
On about 63 nights a year the air drops to 0°C or below, and on about 13 days it stays below freezing all day. About 73 days a year reach 25°C, and 22 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Ribeau. - Acaci: 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 Ribeau. - Acaci
Ribeau. - Acaci is 4.2 km north-west of Ostheim. Every figure on this page is the station’s, not a measurement in Ostheim itself.
| Station (Météo-France number) | Ribeau. - Acaci (68269005) |
| Distance from the town | 4.2 km north-west |
| Station altitude | 220 m |
| Town altitude (its center) | 182 m |
| Period | 1995–2020 (the station’s own record) |
| Sunshine measured at | Colmar-Meyenheim, 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 Ostheim 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 |
|---|---|---|---|---|
| Ostheim | Ribeau. - Acaci | 26.8°C | −0.7°C | 699 mm |
| Ribeauvillé 5.2 km | same station | 26.8°C about the same | −0.7°C about the same | 699 mm |
| Kaysersberg Vignoble 7.6 km | same station | 26.8°C about the same | −0.7°C about the same | 699 mm |
| Ingersheim 8.5 km | Colmar-Inrae | 26.6°C about the same | −0.6°C about the same | 558 mm |
| Horbourg-Wihr 9 km | Colmar-Inrae | 26.6°C about the same | −0.6°C about the same | 558 mm |
| Colmar 9.2 km | Colmar-Inrae | 26.6°C about the same | −0.6°C about the same | 558 mm |
| Turckheim 10 km | Colmar-Inrae | 26.6°C about the same | −0.6°C about the same | 558 mm |
Ostheim weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Ribeau. - Acaci station; sunshine at Colmar-Meyenheim.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 5.2°C | −0.7°C | 2.3°C | 54 mm | 71 |
| February | 7.8°C | 0.1°C | 3.9°C | 48 mm | 99 |
| March | 12.2°C | 2.7°C | 7.4°C | 44 mm | 156 |
| April | 17.2°C | 6.3°C | 11.7°C | 47 mm | 189 |
| May | 21.3°C | 10.3°C | 15.8°C | 72 mm | 210 |
| June | 25.1°C | 13.8°C | 19.5°C | 70 mm | 234 |
| July | 26.8°C | 15.2°C | 21.0°C | 71 mm | 251 |
| August | 26.2°C | 14.7°C | 20.4°C | 69 mm | 233 |
| September | 21.8°C | 10.9°C | 16.4°C | 48 mm | 181 |
| October | 16.6°C | 7.4°C | 12.0°C | 63 mm | 122 |
| November | 9.5°C | 3.0°C | 6.2°C | 55 mm | 72 |
| December | 5.8°C | 0.1°C | 2.9°C | 57 mm | 63 |
| Year | 16.3°C | 7.0°C | 11.6°C | 699 mm | 1,882 |
Where Ostheim’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Ribeau. - Acaci, 4.2 km away: statistics for 1991–2020 (the station’s own years, 1995–2020, 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, Colmar-Meyenheim, 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 Haut-Rhin.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Ostheim’s climate
How warm does Ostheim get in summer?
July is the warmest month, with average highs of 26.8°C. About 73 days a year reach 25°C, more than 67% of mainland French towns, and about 22 reach 30°C.
How cold does Ostheim get in winter?
January nights average −0.7°C. The air drops to 0°C or below on about 63 nights a year, and about 13 days a year stay below freezing all day.
How much rain does Ostheim get?
About 699 mm a year, less than 67% of mainland French towns. May is the wettest month (72 mm) and March the driest (44 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Colmar-Meyenheim (26 km away), averages 1,882 hours of sunshine a year.
Are these figures for Ostheim itself?
No: they are the normals of the Météo-France station matched to Ostheim, Ribeau. - Acaci, 4.2 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 RIBEAU. - ACACI, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Ostheim →
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.