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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Groslay, France, with an average temperature varying between 1.8°C (35.2°F) and 5.9°C (42.6°F). In Groslay, January is the month with the lowest recorded average temperatures, measuring a high of 5.9°C (42.6°F) and a low of 1.8°C (35.2°F). Weather in January »
Weather in February
February, the last month of the winter in Groslay, is a frosty month, with an average temperature ranging between max 7.5°C (45.5°F) and min 1.8°C (35.2°F). The shift from January to February is characterized by an average high-temperature of a chilly 7.5°C (45.5°F), not significantly different from the 5.9°C (42.6°F) of January. Weather in February »
Weather in March
March, the first month of the spring in Groslay, is a cool month, with an average temperature ranging between min 3.9°C (39°F) and max 11.7°C (53.1°F). Groslay, France, in March experiences a slight uptick in the average high-temperature, adjusting from February's chilly 7.5°C (45.5°F) to a fresh 11.7°C (53.1°F). Weather in March »
Weather in April
April in Groslay, France, is a refreshing spring month, with an average temperature ranging between min 6.8°C (44.2°F) and max 16.1°C (61°F). The start of April signals a slight increase in the average high-temperature, moving from a fresh 11.7°C (53.1°F) in March to a refreshing 16.1°C (61°F). Weather in April »
Weather in May
May, the last month of the spring in Groslay, is another comfortable month, with an average temperature ranging between min 8.9°C (48°F) and max 18.1°C (64.6°F). The advent of May brings an average high-temperature of a still comfortable 18.1°C (64.6°F), exhibiting minor difference from the previous month. Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Groslay, France, with temperature in the range of an average low of 12.4°C (54.3°F) and an average high of 21.5°C (70.7°F). Groslay observes a slight uplift in the average high-temperature with the onset of June, adjusting from May's comfortable 18.1°C (64.6°F) to a pleasant 21.5°C (70.7°F). Weather in June »
Weather in July
July is a moderately hot summer month in Groslay, France, with an average temperature fluctuating between 14.6°C (58.3°F) and 24.3°C (75.7°F). As June turns into July, the average high-temperatures rest at a moderately hot 24.3°C (75.7°F), showing a minor variation from the prior month. Weather in July »
Weather in August
August, the last month of the summer in Groslay, is another warm month, with an average temperature fluctuating between 14.8°C (58.6°F) and 24.5°C (76.1°F). Groslay, France, notes the warmest temperatures in August, with a high average of 24.5°C (76.1°F) and a low of 14.8°C (58.6°F). Weather in August »
Weather in September
September, the first month of the autumn in Groslay, is also an agreeable month, with an average temperature fluctuating between 20.9°C (69.6°F) and 11.6°C (52.9°F). The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a warm 24.5°C (76.1°F) in August to a pleasant 20.9°C (69.6°F). Weather in September »
Weather in October
October, like September, in Groslay, France, is another enjoyable autumn month, with temperature in the range of an average high of 16.4°C (61.5°F) and an average low of 9.2°C (48.6°F). The arrival of October signals a subtle shift in temperature, down from an agreeable 20.9°C (69.6°F) in September to an enjoyable 16.4°C (61.5°F). Weather in October »
Weather in November
November, the last month of the autumn in Groslay, is also a fresh month, with temperature in the range of an average high of 10.5°C (50.9°F) and an average low of 5.6°C (42.1°F). The onset of November introduces a moderate change in Groslay's weather, with average high-temperatures falling from October's refreshing 16.4°C (61.5°F) to a cool 10.5°C (50.9°F). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Groslay, France, with an average temperature fluctuating between 7°C (44.6°F) and 3°C (37.4°F). December's arrival signals a moderate reduction in the average high-temperature, easing from a fresh 10.5°C (50.9°F) in November to a chilly 7°C (44.6°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
What time of the year is the coldest in Groslay?
The month of January sees the average lowest temperatures, reaching 5.9°C (42.6°F) at the peak and 1.8°C (35.2°F) at the low.
What is the most humid month in Groslay?
The months with the highest humidity are January and December, with an average relative humidity of 86%.
How many days does it rain in Groslay?
In Groslay, France, during the entire year, the rain falls for 149.5 days and collects up to 278mm (10.94") of precipitation.
When does it snow in Groslay?
Months with snowfall are January through March, November and December.
What is the snowiest month in Groslay?
The months with the most snowfall in Groslay are January, February and December, with an average 11mm (0.43") of accumulated snow.
How many days does it snow in Groslay?
In Groslay, during the entire year, snow falls for 7.2 days and aggregates up to 40mm (1.57") of snow.
What is the month with the least sunshine in Groslay?
The month with the least sunshine in Groslay is January, with an average of 3.8h of sunshine.
What is the month with the lowest UV index in Groslay?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
When it does not snow in Groslay?
April through October are months without snowfall.
When are the longest days in Groslay?
With an average of 16h and 6min of daylight, June has the longest days of the year in Groslay.
What is the month with the highest UV index in Groslay?
With an average maximum UV index of 6, July is the month with the highest UV index.
What part of the year is the hottest in Groslay?
August, characterized by an average high temperature of 24.5°C (76.1°F) and a low temperature of 14.8°C (58.6°F), is generally the warmest month in Groslay, France.
What is the least humid month in Groslay?
August is the least humid month in Groslay, with an average relative humidity of 68%.
What month has the most sunshine in Groslay?
With an average of 9h of sunshine, August has the most sunshine of the year in Groslay.
What is the driest month in Groslay?
The month with the least rainfall in Groslay, France, is September, when the rain falls for 9.2 days and typically collects 14mm (0.55") of precipitation.
When is Daylight Saving Time (DST) in Groslay?
On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends, 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.
What is the rainiest month in Groslay?
The month with the most rainfall in Groslay is December, when the rain falls for 14.2 days and typically aggregates up to 31mm (1.22") of precipitation.
What is the month with the shortest days in Groslay?
With an average of 8h and 18min of daylight, December has the shortest days of the year.
Average temperature
Groslay, France
The warmest month (with the highest average high temperature) is August (24.5°C).
The month with the lowest average high temperature is January (5.9°C).
The month with the highest average low temperature is August (14.8°C).
The coldest months (with the lowest average low temperature) are January and February (1.8°C).
Average pressure
Groslay, France
- Average pressure in January:
1017.5mbar - Average pressure in February:
1016.2mbar - Average pressure in March:
1016.5mbar - Average pressure in April:
1015.8mbar - Average pressure in May:
1016.8mbar - Average pressure in June:
1016.6mbar
- Average pressure in July:
1016.5mbar - Average pressure in August:
1016.5mbar - Average pressure in September:
1018.1mbar - Average pressure in October:
1017mbar - Average pressure in November:
1013.3mbar - Average pressure in December:
1018.1mbar
The months with the highest atmospheric pressure are September and December (1018.1mbar).
The month with the lowest atmospheric pressure is November (1013.3mbar).
Average wind speed
Groslay, France
- Average wind speed in January:
14.4km/h - Average wind speed in February:
15.5km/h - Average wind speed in March:
14.2km/h - Average wind speed in April:
11.9km/h - Average wind speed in May:
11.7km/h - Average wind speed in June:
11.3km/h
- Average wind speed in July:
10.7km/h - Average wind speed in August:
10.1km/h - Average wind speed in September:
10.4km/h - Average wind speed in October:
11.9km/h - Average wind speed in November:
13.7km/h - Average wind speed in December:
15km/h
The windiest month (with the highest average wind speed) is February (15.5km/h).
The calmest month (with the lowest average wind speed) is August (10.1km/h).
Average humidity
Groslay, France
The months with the highest relative humidity are January and December (86%).
The month with the lowest relative humidity is August (68%).
Average rainfall
Groslay, France
The wettest month (with the highest rainfall) is December (31mm).
The driest month (with the least rainfall) is September (14mm).
Average rainfall days
Groslay, France
- Average rainfall days in January:
13.2 days - Average rainfall days in February:
11.1 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
11.2 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
14.1 days
- Average rainfall days in July:
14.5 days - Average rainfall days in August:
13.1 days - Average rainfall days in September:
9.2 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
11.7 days - Average rainfall days in December:
14.2 days
The month with the highest number of rainy days is July (14.5 days).
The month with the least rainy days is September (9.2 days).
Average snowfall
Groslay, France
The months with the highest snowfall are January, February and December (11mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Groslay, France
- Average snowfall days in January:
2 days - Average snowfall days in February:
2.2 days - Average snowfall days in March:
0.8 days - Average snowfall days in April:
0 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:
0.5 days - Average snowfall days in December:
1.7 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Groslay, France
- Average daylight in January:
8h and 5min - Average daylight in February:
10h and 1min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 2min - Average daylight in June:
16h and 1min
- Average daylight in July:
15h and 4min - Average daylight in August:
14h and 2min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 1min - Average daylight in December:
8h and 2min
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 5min - Average sunshine in February:
4h and 5min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 1min - Average sunshine in June:
8h and 4min
- Average sunshine in July:
8h and 5min - Average sunshine in August:
9h and 0min - Average sunshine in September:
7h and 4min - Average sunshine in October:
5h and 5min - Average sunshine in November:
4h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Groslay, France
- Average sunshine days in January:
14.3 days - Average sunshine days in February:
12.5 days - Average sunshine days in March:
16.9 days - Average sunshine days in April:
15.4 days - Average sunshine days in May:
13.8 days - Average sunshine days in June:
13 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
14.9 days - Average sunshine days in September:
17.9 days - Average sunshine days in October:
15.8 days - Average sunshine days in November:
14.5 days - Average sunshine days in December:
12.9 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (12.5 days).
Average UV index
Groslay, France
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Groslay, France
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 39).
Average visibility
Groslay, 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).
