Warm afternoons come to Omissy less often than to 85% of mainland French towns
Deep winter brings January lows near 1.1°C. Rain peaks in August and eases off in April. Its yearly rainfall falls short of 75% of mainland French towns. An umbrella earns its place on about 120 days a year with 1 mm of rain or more.
These are the figures of Météo-France’s Saint-Quentin station, 10 km south-west.
A year in Omissy at a glance
Each month’s typical high and low in °C, at the Saint-Quentin station.
What a year in Omissy feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Quentin.
About 683 mm of rain a year
August is the wettest month and April the driest. About 18 days a year bring 10 mm or more. 17th wettest of 24 towns of 2,500+ in Aisne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Saint-Quentin
49 frosts and 35 days of 25°C a year
On about 49 nights a year the air drops to 0°C or below, and on about 7 days it stays below freezing all day. About 35 days a year reach 25°C, and 7 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Quentin: 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 Saint-Quentin
Saint-Quentin is 10 km south-west of Omissy. Every figure on this page is the station’s, not a measurement in Omissy itself.
| Station (Météo-France number) | Saint-Quentin (02320001) |
| Distance from the town | 10 km south-west |
| Station altitude | 98 m |
| Town altitude (its center) | 85 m |
| Period | 1991–2020 |
| 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 Omissy 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 Aisne.
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 |
|---|---|---|---|---|
| Omissy | Saint-Quentin | 24.0°C | 1.1°C | 683 mm |
| Saint-Quentin 3.5 km | same station | 24.0°C about the same | 1.1°C about the same | 683 mm |
| Gauchy 6.2 km | same station | 24.0°C about the same | 1.1°C about the same | 683 mm |
| Fresnoy-le-Grand 11 km | Épehy | 23.7°C about the same | 1.1°C about the same | 753 mm |
| Bohain-en-Vermandois 16 km | Épehy | 23.7°C about the same | 1.1°C about the same | 753 mm |
| Ham 22 km | same station | 24.0°C about the same | 1.1°C about the same | 683 mm |
| Guise 23 km | Fontaine-lès-Vv | 23.4°C 0.6°C cooler | 0.8°C about the same | 826 mm |
Omissy weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Quentin station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.0°C | 1.1°C | 3.6°C | 54 mm | 62 |
| February | 7.1°C | 1.2°C | 4.2°C | 48 mm | 79 |
| March | 11.2°C | 3.1°C | 7.2°C | 51 mm | 135 |
| April | 15.0°C | 4.9°C | 10.0°C | 43 mm | 183 |
| May | 18.4°C | 8.3°C | 13.4°C | 57 mm | 206 |
| June | 21.5°C | 11.0°C | 16.2°C | 60 mm | 208 |
| July | 24.0°C | 12.9°C | 18.4°C | 60 mm | 214 |
| August | 23.9°C | 12.9°C | 18.4°C | 71 mm | 207 |
| September | 20.2°C | 10.3°C | 15.2°C | 51 mm | 167 |
| October | 15.2°C | 7.6°C | 11.4°C | 60 mm | 116 |
| November | 9.8°C | 4.1°C | 6.9°C | 57 mm | 67 |
| December | 6.5°C | 1.7°C | 4.1°C | 70 mm | 54 |
| Year | 14.9°C | 6.6°C | 10.8°C | 683 mm | 1,696 |
Where Omissy’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Quentin, 10 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, Saint-Quentin, 10 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 Aisne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Omissy’s climate
How warm does Omissy get in summer?
July is the warmest month, with average highs of 24.0°C. About 35 days a year reach 25°C, fewer than 85% of mainland French towns, and about 7 reach 30°C.
How cold does Omissy get in winter?
January nights average 1.1°C. The air drops to 0°C or below on about 49 nights a year, and about 7 days a year stay below freezing all day.
How much rain does Omissy get?
About 683 mm a year, less than 75% of mainland French towns. August is the wettest month (71 mm) and April the driest (43 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Quentin (10 km away), averages 1,696 hours of sunshine a year.
Are these figures for Omissy itself?
No: they are the normals of the Météo-France station matched to Omissy, Saint-Quentin, 10 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 ST QUENTIN, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Omissy →
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.