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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, like December, is a frosty winter month in South Reston, United Kingdom, with an average temperature fluctuating between 2.8°C (37°F) and 6.2°C (43.2°F). In South Reston, the lowest temperatures are generally noted in January, averaging a high of 6.2°C (43.2°F) and a low of 2.8°C (37°F). Weather in January »
Weather in February
The last month of the winter, February, is also a frosty month in South Reston, United Kingdom, with temperature in the range of an average high of 6.8°C (44.2°F) and an average low of 3°C (37.4°F). As January turns into February, the average high-temperatures rest at a still chilly 6.8°C (44.2°F), showing a minor variation from the prior month. Weather in February »
Weather in March
March, the first month of the spring in South Reston, is still a chilly month, with an average temperature varying between 9.2°C (48.6°F) and 3.9°C (39°F). With the start of March, South Reston measures an average high-temperature of a still chilly 9.2°C (48.6°F), not significantly differing from February's 6.8°C (44.2°F). Weather in March »
Weather in April
April in South Reston, United Kingdom, is a fresh spring month, with temperature in the range of an average low of 5.7°C (42.3°F) and an average high of 11.8°C (53.2°F). A minor adjustment in South Reston's average high-temperature is noted with the start of April, touching a fresh 11.8°C (53.2°F) from March's 9.2°C (48.6°F). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in South Reston, United Kingdom, with an average temperature varying between 7.8°C (46°F) and 14.1°C (57.4°F). Entering May, the average high-temperature is recorded at a mild 14.1°C (57.4°F), exhibiting a minimal shift from April's 11.8°C (53.2°F). Weather in May »
Weather in June
June, the first month of the summer in South Reston, is a refreshing month, with an average temperature fluctuating between 16.6°C (61.9°F) and 10.3°C (50.5°F). The advent of June observes an average high-temperature of an enjoyable 16.6°C (61.9°F), nearly identical to May's 14.1°C (57.4°F). Weather in June »
Weather in July
July, the same as June, is another enjoyable summer month in South Reston, United Kingdom, with an average temperature fluctuating between 19.3°C (66.7°F) and 12.9°C (55.2°F). The advent of July sees the average high-temperature at a still enjoyable 19.3°C (66.7°F), subtly shifted from June's 16.6°C (61.9°F). Weather in July »
Weather in August
August, the last month of the summer in South Reston, is another refreshing month, with an average temperature ranging between min 13.8°C (56.8°F) and max 19.8°C (67.6°F). In South Reston, the highest average temperatures are observed in August, with a high of 19.8°C (67.6°F) and a low of 13.8°C (56.8°F). Weather in August »
Weather in September
September, the first month of the autumn in South Reston, is also an enjoyable month, with an average temperature ranging between min 12°C (53.6°F) and max 17.4°C (63.3°F). South Reston registers an average high-temperature of a still enjoyable 17.4°C (63.3°F) with the arrival of September, showing minor deviation from the preceding month. Weather in September »
Weather in October
October, like September, is a moderate autumn month in South Reston, United Kingdom, with an average temperature varying between 13.9°C (57°F) and 9.7°C (49.5°F). The arrival of October corresponds with a minor reduction in the average high-temperature, down from September's 17.4°C (63.3°F) to a still refreshing 13.9°C (57°F). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in South Reston, United Kingdom, with an average temperature fluctuating between 9.7°C (49.5°F) and 6.2°C (43.2°F). November's onset brings a negligible change in high-temperatures, falling from a refreshing 13.9°C (57°F) in October to a frosty 9.7°C (49.5°F). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in South Reston, United Kingdom, with an average temperature fluctuating between 3.7°C (38.7°F) and 7°C (44.6°F). The arrival of December records an average high-temperature of a still frosty 7°C (44.6°F), closely related to the 9.7°C (49.5°F) observed in November. Weather in December »
Updated: Feb 6, 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 South Reston?
Temperature readings in South Reston, United Kingdom, reach their annual highs in January, averaging 6.2°C (43.2°F) and a minimum average of 2.8°C (37°F).
How many days does it rain in South Reston?
Throughout the year, there are 165.5 rainfall days, and 413mm (16.26") of precipitation is accumulated.
When does it snow in South Reston?
Months with snowfall are January through March, November and December.
What is the snowiest month in South Reston?
January is the month with the most snowfall in South Reston, United Kingdom. Snow falls for 3.3 days and accumulates 17mm (0.67") of snow.
How much does it snow in South Reston?
Throughout the year, there are 9.4 snowfall days, and 41mm (1.61") of snow is accumulated.
When is the lowest UV index in South Reston?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in South Reston, United Kingdom.
What is the month with the least sunshine in South Reston?
The months with the least sunshine are February and November, with an average of 3.9h of sunshine.
What is the driest month in South Reston?
April is the month with the least rainfall in South Reston. Rain falls for 11.9 days and accumulates 18mm (0.71") of precipitation.
When it does not snow in South Reston?
April through October are months without snowfall in South Reston.
When are the longest days in South Reston?
With an average of 16h and 54min of daylight, June has the longest days of the year in South Reston.
When is the highest UV index in South Reston?
The month with the highest UV index in South Reston, United Kingdom, is July, with an average maximum UV index of 5.
What is the warmest month in South Reston?
With average high and low temperatures of 19.8°C (67.6°F) and 13.8°C (56.8°F) respectively, August is South Reston's warmest month.
What is the least humid month in South Reston?
With an average relative humidity of 76%, August is the least humid month in South Reston.
What month has the most sunshine in South Reston?
The month with the most sunshine in South Reston is August, with an average of 8.2h of sunshine.
What is the rainiest month in South Reston?
The month with the most rainfall in South Reston is October, when the rain falls for 14.3 days and typically aggregates up to 48mm (1.89") of precipitation.
When is Daylight Saving Time (DST) in South Reston?
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to BST.
What is the most humid month in South Reston?
The most humid month in South Reston, United Kingdom, is December, with an average relative humidity of 87%.
What is the month with the shortest days in South Reston?
With an average of 7h and 36min of daylight, December has the shortest days of the year in South Reston, United Kingdom.
Average temperature
South Reston, United Kingdom
The warmest month (with the highest average high temperature) is August (19.8°C).
The month with the lowest average high temperature is January (6.2°C).
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).
Average pressure
South Reston, United Kingdom
- Average pressure in January:
1012.6mbar - Average pressure in February:
1012.2mbar - Average pressure in March:
1014.6mbar - Average pressure in April:
1015.6mbar - Average pressure in May:
1016.4mbar - Average pressure in June:
1015.6mbar
- Average pressure in July:
1014.2mbar - Average pressure in August:
1013.5mbar - Average pressure in September:
1015.7mbar - Average pressure in October:
1014mbar - Average pressure in November:
1009.3mbar - Average pressure in December:
1012.1mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.3mbar).
Average wind speed
South Reston, United Kingdom
- Average wind speed in January:
21.8km/h - Average wind speed in February:
21.8km/h - Average wind speed in March:
19.2km/h - Average wind speed in April:
16.8km/h - Average wind speed in May:
16.4km/h - Average wind speed in June:
14.9km/h
- Average wind speed in July:
14.6km/h - Average wind speed in August:
15.9km/h - Average wind speed in September:
16.4km/h - Average wind speed in October:
19.2km/h - Average wind speed in November:
20.6km/h - Average wind speed in December:
22.3km/h
The windiest month (with the highest average wind speed) is December (22.3km/h).
The calmest month (with the lowest average wind speed) is July (14.6km/h).
Average humidity
South Reston, United Kingdom
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is August (76%).
Average rainfall
South Reston, United Kingdom
The wettest month (with the highest rainfall) is October (48mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days
South Reston, United Kingdom
- Average rainfall days in January:
13.3 days - Average rainfall days in February:
11.8 days - Average rainfall days in March:
13.5 days - Average rainfall days in April:
11.9 days - Average rainfall days in May:
14.5 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
15.5 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
13.4 days - Average rainfall days in December:
13.6 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is September (11.3 days).
Average snowfall
South Reston, United Kingdom
The month with the highest snowfall is January (17mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
South Reston, United Kingdom
- Average snowfall days in January:
3.3 days - Average snowfall days in February:
3.3 days - Average snowfall days in March:
1.4 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:
0.1 days - Average snowfall days in November:
0.2 days - Average snowfall days in December:
1 days
The months with the highest number of snowfall days are January and February (3.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
South Reston, United Kingdom
- Average daylight in January:
8h and 1min - Average daylight in February:
9h and 5min - Average daylight in March:
11h and 5min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 5min - Average daylight in June:
16h and 5min
- Average daylight in July:
16h and 2min - Average daylight in August:
14h and 4min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
8h and 4min - Average daylight in December:
7h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 4min - Average sunshine in May:
7h and 3min - Average sunshine in June:
7h and 2min
- Average sunshine in July:
7h and 5min - Average sunshine in August:
8h and 1min - Average sunshine in September:
7h and 2min - Average sunshine in October:
4h and 1min - Average sunshine in November:
3h and 5min - Average sunshine in December:
4h and 2min
The month with the most sunshine is August (Average sunshine: 8h and 12min).
The months with the least sunshine are February and November (Average sunshine: 3h and 54min).
Average sunshine days
South Reston, United Kingdom
- Average sunshine days in January:
12.6 days - Average sunshine days in February:
11.5 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
15.7 days - Average sunshine days in May:
13.8 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
11.4 days - Average sunshine days in August:
12.5 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
13.8 days - Average sunshine days in November:
13.5 days - Average sunshine days in December:
13.5 days
The month with the most sunshine days is April (15.7 days).
The month with the least sunshine days is July (11.4 days).
Average UV index
South Reston, United Kingdom
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
South Reston, United Kingdom
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are April and September (Cloud cover 47).
Average visibility
South Reston, United Kingdom
The months with the highest visibility are March, August, September and October (10km).
The months with the lowest visibility are January, February, April, May, June, July, November and December (9km).
