Climate and monthly weather forecastGuyancourt, France
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Guyancourt, France, with an average temperature varying between 5.8°C (42.4°F) and 1.6°C (34.9°F). With average high and low temperatures of 5.8°C (42.4°F) and 1.6°C (34.9°F) respectively, January is Guyancourt's coldest month. Weather in January »Weather in February
February, the last month of the winter in Guyancourt, is a frosty month, with temperature in the range of an average high of 7.5°C (45.5°F) and an average low of 1.6°C (34.9°F). In February, Guyancourt's weather conditions record an average high-temperature of a frosty 7.5°C (45.5°F), demonstrating little divergence from the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Guyancourt, France, with an average temperature fluctuating between 3.8°C (38.8°F) and 11.6°C (52.9°F). The shift into March is marked by a modest rise in the average high-temperature, moving from February's frosty 7.5°C (45.5°F) to a fresh 11.6°C (52.9°F). Weather in March »Weather in April
April in Guyancourt, France, is a moderate spring month, with an average temperature varying between 6.4°C (43.5°F) and 15.7°C (60.3°F). Guyancourt in April observes a minor temperature shift, with average high-temperatures adjusting from a cool 11.6°C (52.9°F) in March to a moderate 15.7°C (60.3°F). Weather in April »Weather in May
May, the last month of the spring in Guyancourt, is a comfortable month, with an average temperature varying between 18°C (64.4°F) and 8.8°C (47.8°F). May brings a marginal elevation to an enjoyable 18°C (64.4°F) from April's 15.7°C (60.3°F) in Guyancourt's average high-temperatures. Weather in May »Weather in June
June, the first month of the summer in Guyancourt, is a pleasant month, with temperature in the range of an average low of 12.1°C (53.8°F) and an average high of 21.3°C (70.3°F). June's arrival signals a modest temperature shift, moving from a refreshing 18°C (64.4°F) in May to an agreeable 21.3°C (70.3°F). Weather in June »Weather in July
July is a moderately hot summer month in Guyancourt, France, with an average temperature fluctuating between 23.9°C (75°F) and 14.4°C (57.9°F). As June transitions into July, the average high-temperature rests at a moderately hot 23.9°C (75°F), maintaining a close resemblance to the previous month. Weather in July »Weather in August
The last month of the summer, August, is another warm month in Guyancourt, France, with an average temperature fluctuating between 14.4°C (57.9°F) and 24.3°C (75.7°F). August, with its average high-temperature of 24.3°C (75.7°F) and an average low-temperature of 14.4°C (57.9°F), holds the record as the warmest month. Weather in August »Weather in September
The first month of the autumn, September, is also an agreeable month in Guyancourt, France, with an average temperature ranging between max 20.8°C (69.4°F) and min 11.5°C (52.7°F). In Guyancourt, entering September brings a subtle temperature decrement, reducing from August's warm 24.3°C (75.7°F) to a pleasant 20.8°C (69.4°F). Weather in September »Weather in October
October, like September, in Guyancourt, France, is another comfortable autumn month, with an average temperature fluctuating between 9°C (48.2°F) and 16.2°C (61.2°F). Guyancourt records a mild change in average high-temperature during October, easing from an agreeable 20.8°C (69.4°F) in September to an enjoyable 16.2°C (61.2°F). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Guyancourt, France, with an average temperature varying between 5.7°C (42.3°F) and 10.4°C (50.7°F). The transition into November indicates a reduction in the average high-temperature, down to a cool 10.4°C (50.7°F) from October's enjoyable 16.2°C (61.2°F). Weather in November »Weather in December
December, the first month of the winter in Guyancourt, is also a frosty month, with an average temperature fluctuating between 2.7°C (36.9°F) and 7.1°C (44.8°F). December brings a slight decrease in the average high-temperature, shifting from a fresh 10.4°C (50.7°F) in November to a frosty 7.1°C (44.8°F). Weather in December »Updated: Feb 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Guyancourt's coldest temperatures are experienced in January, with average high temperatures of 5.8°C (42.4°F) and lows of 1.6°C (34.9°F).
January and December, with an average relative humidity of 86%, are most humid months.
In Guyancourt, during the entire year, the rain falls for 156.2 days and collects up to 318mm (12.52") of precipitation.
Months with snowfall are January through March, November and December.
The months with the most snowfall are January, March and December, with an average 18mm (0.71") of accumulated snow.
In Guyancourt, during the entire year, snow falls for 10.7 days and aggregates up to 75mm (2.95") of snow.
January has the least sunshine of the year in Guyancourt, France, with an average of 3.8h of sunshine.
The months with the lowest UV index in Guyancourt are January, February, November and December, with an average maximum UV index of 2.
April through October are months without snowfall.
June is the month with the most rainfall. Rain falls for 15.9 days and accumulates 40mm (1.57") of precipitation.
June has the longest days of the year, with an average of 16h and 6min of daylight.
June through August, with an average maximum UV index of 5, are months with the highest UV index.
The months with the most sunshine in Guyancourt are July and August, with an average of 9.1h of sunshine.
Temperature records in Guyancourt mark August as the warmest month, with highs averaging 24.3°C (75.7°F) and lows at 14.4°C (57.9°F).
August is the least humid month in Guyancourt, France, with an average relative humidity of 69%.
The month with the least rainfall is September, when the rain falls for 9.6 days and typically collects 15mm (0.59") of precipitation.
On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Guyancourt, France, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.
The month with the shortest days is December, with an average of 8h and 18min of daylight.
Average temperature
Guyancourt, France
The warmest month (with the highest average high temperature) is August (24.3°C).
The month with the lowest average high temperature is January (5.8°C).
The months with the highest average low temperature are July and August (14.4°C).
The coldest months (with the lowest average low temperature) are January and February (1.6°C).
Average pressure
Guyancourt, France
- Average pressure in January:
1017.6mbar - Average pressure in February:
1016.2mbar - Average pressure in March:
1016.6mbar - Average pressure in April:
1015.8mbar - Average pressure in May:
1016.9mbar - Average pressure in June:
1016.7mbar
- Average pressure in July:
1016.6mbar - Average pressure in August:
1016.5mbar - Average pressure in September:
1018.1mbar - Average pressure in October:
1017mbar - Average pressure in November:
1013.4mbar - Average pressure in December:
1018.3mbar
The month with the highest atmospheric pressure is December (1018.3mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).
Average wind speed
Guyancourt, France
- Average wind speed in January:
15km/h - Average wind speed in February:
16km/h - Average wind speed in March:
14.5km/h - Average wind speed in April:
12km/h - Average wind speed in May:
11.7km/h - Average wind speed in June:
11.3km/h
- Average wind speed in July:
10.9km/h - Average wind speed in August:
10.3km/h - Average wind speed in September:
10.7km/h - Average wind speed in October:
12.2km/h - Average wind speed in November:
14.1km/h - Average wind speed in December:
15.6km/h
The windiest month (with the highest average wind speed) is February (16km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).
Average humidity
Guyancourt, France
The months with the highest relative humidity are January and December (86%).
The month with the lowest relative humidity is August (69%).
Average rainfall
Guyancourt, France
The wettest month (with the highest rainfall) is June (40mm).
The driest month (with the least rainfall) is September (15mm).
Average rainfall days
Guyancourt, France
- Average rainfall days in January:
12.6 days - Average rainfall days in February:
10.1 days - Average rainfall days in March:
12.4 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
15.8 days - Average rainfall days in June:
15.9 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
9.6 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
12.1 days - Average rainfall days in December:
14.1 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is September (9.6 days).
Average snowfall
Guyancourt, France
The months with the highest snowfall are January, March and December (18mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Guyancourt, France
- Average snowfall days in January:
3.2 days - Average snowfall days in February:
3.3 days - Average snowfall days in March:
1 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.7 days - Average snowfall days in December:
2.4 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Guyancourt, France
- Average daylight in January:
8h and 48min - Average daylight in February:
10h and 12min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 18min - Average daylight in June:
16h and 6min
- Average daylight in July:
15h and 42min - Average daylight in August:
14h and 18min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 12min - Average daylight in December:
8h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
4h and 54min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 12min - Average sunshine in June:
8h and 30min
- Average sunshine in July:
9h and 6min - Average sunshine in August:
9h and 6min - Average sunshine in September:
7h and 42min - Average sunshine in October:
5h and 54min - Average sunshine in November:
4h and 12min - Average sunshine in December:
4h and 12min
The months with the most sunshine are July and August (Average sunshine: 9h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Guyancourt, France
- Average sunshine days in January:
13.4 days - Average sunshine days in February:
13.5 days - Average sunshine days in March:
15.7 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
11.5 days - Average sunshine days in August:
13.7 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
15.1 days - Average sunshine days in November:
13.5 days - Average sunshine days in December:
12.7 days
The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is June (10.9 days).
Average UV index
Guyancourt, France
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Guyancourt, France
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 38).
Average visibility
Guyancourt, France
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
