Saint-Quentin-en-Yvelines climate
Saint-Quentin-en-Yvelines (Île-de-France, France) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 10 °C51 °F, and about 672 mm26 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Saint-Quentin-en-Yvelines climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 642 | 032 | 337 | 562.2 | 14 |
| Feb | 745 | 031 | 338 | 502.0 | 13 |
| Mar | 1152 | 135 | 643 | 542.1 | 8 |
| Apr | 1559 | 440 | 1049 | 411.6 | 2 |
| May | 1865 | 846 | 1356 | 642.5 | 0 |
| Jun | 2272 | 1152 | 1762 | 582.3 | 0 |
| Jul | 2475 | 1355 | 1965 | 552.1 | 0 |
| Aug | 2475 | 1355 | 1865 | 582.3 | 0 |
| Sep | 2069 | 1049 | 1559 | 421.6 | 0 |
| Oct | 1660 | 744 | 1152 | 612.4 | 1 |
| Nov | 1050 | 338 | 744 | 642.5 | 4 |
| Dec | 643 | 133 | 338 | 712.8 | 14 |
| Year | 2475 | 031 | 1051 | 67226 | 54 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 93% | 75% | 1.0 | 8:41 |
| Feb | 88% | 70% | 1.8 | 10:06 |
| Mar | 83% | 65% | 3.0 | 11:44 |
| Apr | 78% | 62% | 4.5 | 13:38 |
| May | 78% | 67% | 5.2 | 15:14 |
| Jun | 76% | 64% | 5.8 | 16:08 |
| Jul | 73% | 61% | 5.6 | 15:46 |
| Aug | 74% | 62% | 4.8 | 14:21 |
| Sep | 77% | 57% | 3.7 | 12:30 |
| Oct | 85% | 67% | 2.2 | 10:41 |
| Nov | 91% | 74% | 1.2 | 9:05 |
| Dec | 93% | 74% | 0.8 | 8:17 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Saint-Quentin-en-Yvelines is like
The warmest month is July, with an average high of 24 °C75 °F and a low of 13 °C55 °F. The coldest is January, when highs average 6 °C42 °F and lows 0 °C32 °F. There is a clear seasonal cycle, with 15.7 °C28.3 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 672 mm26 in. Rain is spread fairly evenly through the year. The wettest month is December (71 mm2.8 in), the driest is April (41 mm1.6 in).
Relative humidity ranges from 73% in July to 93% in December. The clearest skies (lowest average cloud amount, 57%) are typical of September. Average wind speed near the ground ranges from 9 km/h (6 mph) in August to 13 km/h (8 mph) in February. Daylight lasts from about 8.3 hours in December to 16.1 hours in June.
Best time to visit Saint-Quentin-en-Yvelines
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–September: average highs of 18 °C65 °F to 24 °C75 °F with 42 mm1.6 in to 64 mm2.5 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 6 °C42 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Saint-Quentin-en-Yvelines
- Winter (December–February) — highs 642 to 7 °C45 °F, lows 031 to 1 °C33 °F, about 59 mm2.3 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 1152 to 18 °C65 °F, lows 135 to 8 °C46 °F, about 53 mm2.1 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 2272 to 24 °C75 °F, lows 1152 to 13 °C55 °F, about 57 mm2.2 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 1050 to 20 °C69 °F, lows 338 to 10 °C49 °F, about 55 mm2.2 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Saint-Quentin-en-Yvelines compares
Compared with Paris, about 26 km to the east, Saint-Quentin-en-Yvelines is on average 0.8 °C1.5 °F cooler and receives a similar amount of precipitation. The difference is largest in July (1.1 °C2 °F cooler).
Of the 36 places in France covered by World Climates, Saint-Quentin-en-Yvelines is the 35th warmest by annual mean temperature and the 30th wettest by annual precipitation. See all of them on the France climate page.
Places in other countries with the most similar temperature and rainfall pattern: Brussels (Belgium, Cfb), Antwerp (Belgium, Cfb) and Leuven (Belgium, Cfb).
Nearby places
- Paris 26 km · 11 °C52 °F · 662 mm26 in
- Cergy-Pontoise 30 km · 11 °C52 °F · 672 mm26 in
- Orléans 97 km · 11 °C52 °F · 665 mm26 in
- Rouen 100 km · 11 °C52 °F · 750 mm30 in
- Amiens 127 km · 11 °C51 °F · 749 mm29 in
- Reims 156 km · 11 °C51 °F · 740 mm29 in
- Le Mans 159 km · 12 °C53 °F · 707 mm28 in
- Le Havre 161 km · 12 °C53 °F · 803 mm32 in
Frequently asked questions
What is the warmest month in Saint-Quentin-en-Yvelines?
July is the warmest month in Saint-Quentin-en-Yvelines, with an average high of 24 °C (75 °F) and an average low of 13 °C (55 °F).
What is the coldest month in Saint-Quentin-en-Yvelines?
January is the coldest month, with an average high of 6 °C (42 °F) and an average low of 0 °C (32 °F).
When does it rain the most in Saint-Quentin-en-Yvelines?
December is the wettest month with about 71 mm (2.8 in) of precipitation; April is the driest with about 41 mm (1.6 in).
What is the best time to visit Saint-Quentin-en-Yvelines?
Judging by long-term averages, the most comfortable months are May–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.