Climate averages 1991–2020
Saint-Quentin-en-Yvelines weather
in August.
A warm, moderately wet month: the warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Saint-Quentin-en-Yvelines: daytime highs average 23.4°C and nights cool to about 14.2°C. By daytime temperature it is the warmest month of the year.
Expect about 58 mm of rain on roughly 9 days, which makes August a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 22 min on an average August day.
The nearest other city in this atlas is Versailles (9 km away). In August its highs average 23.5°C, about as warm as Saint-Quentin-en-Yvelines, with 56 mm of rain.
Among the 57 cities listed in France, Saint-Quentin-en-Yvelines ranks 47th of 57 for the warmest August highs and joint 31st of 57 for the driest August (rainfall, lowest first). The mean August high of those 57 cities is 25.0°C; Saint-Quentin-en-Yvelines is 1.6°C cooler than that mean.
From August to September, average highs fall by 3.5°C to 19.9°C, and monthly rainfall falls from 58 mm to 48 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Saint-Quentin-en-Yvelines climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.5°C1.5°C | 1.5°C | 53 | 11.3 | 8.89 h |
| February | 7.7°C1.2°C | 1.2°C | 47 | 10.0 | 10.110 h |
| March | 11.1°C3.0°C | 3.0°C | 51 | 10.6 | 11.912 h |
| April | 14.3°C5.2°C | 5.2°C | 52 | 10.9 | 13.714 h |
| May | 17.7°C8.9°C | 8.9°C | 67 | 11.6 | 15.215 h |
| June | 20.9°C12.1°C | 12.1°C | 60 | 10.4 | 16.116 h |
| July | 23.3°C14.2°C | 14.2°C | 55 | 9.1 | 15.716 h |
| August, selected | 23.4°C14.2°C | 14.2°C | 58 | 8.9 | 14.414 h |
| September | 19.9°C11.3°C | 11.3°C | 48 | 8.5 | 12.613 h |
| October | 15.4°C8.6°C | 8.6°C | 63 | 11.2 | 10.911 h |
| November | 10.1°C4.7°C | 4.7°C | 59 | 11.1 | 9.29 h |
| December | 6.9°C2.0°C | 2.0°C | 68 | 12.4 | 8.48 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Versailles in AugustFrance · 9 kmHigh 23.5°C · Low 14.4°C · 56 mm rain
- Boulogne-Billancourt in AugustFrance · 18 kmHigh 24.2°C · Low 15.2°C · 56 mm rain
- Paris 15 Vaugirard in AugustFrance · 22 kmHigh 24.3°C · Low 15.0°C · 56 mm rain
- Paris 13 Gobelins in AugustFrance · 26 kmHigh 24.3°C · Low 14.8°C · 56 mm rain
- Argenteuil in AugustFrance · 26 kmHigh 24.2°C · Low 14.9°C · 57 mm rain
- Paris in AugustFrance · 26 kmHigh 24.3°C · Low 14.8°C · 56 mm rain
- Paris 20 Ménilmontant in AugustFrance · 30 kmHigh 24.0°C · Low 14.5°C · 56 mm rain
- Cergy-Pontoise in AugustFrance · 30 kmHigh 23.8°C · Low 14.8°C · 58 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Saint-Quentin-en-Yvelines) is explained once on the Saint-Quentin-en-Yvelines year overview and on the Sources, method and limits page.