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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, in Reston, Virginia, is an icy winter month, with an average temperature ranging between max 39.7°F (4.3°C) and min 26.4°F (-3.1°C). Reston's January weather, with an average high temperature of 39.7°F (4.3°C) and an average low temperature of 26.4°F (-3.1°C), tends to be the coldest of the year. Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in Reston, Virginia, with an average temperature varying between 28.8°F (-1.8°C) and 43.9°F (6.6°C). The transition into February reveals an average high-temperature of a chilly 43.9°F (6.6°C), mirroring a close resemblance to January. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Reston, Virginia, with an average temperature varying between 36.1°F (2.3°C) and 52.5°F (11.4°C). Observing a minor shift, the average high-temperature during March adjusts from February's chilly 43.9°F (6.6°C) to a fresh 52.5°F (11.4°C). Weather in March »
Weather in April
April is a comfortable spring month in Reston, Virginia, with temperature in the range of an average high of 64.9°F (18.3°C) and an average low of 45.9°F (7.7°C). The beginning of April marks a shift in the average high-temperature, moving from March's fresh 52.5°F (11.4°C) to a refreshing 64.9°F (18.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Reston, Virginia, with an average temperature ranging between min 55.6°F (13.1°C) and max 74.8°F (23.8°C). The onset of May brings a temperature shift, with the average high-temperature moving from a comfortable 64.9°F (18.3°C) in April to a moderately hot 74.8°F (23.8°C). Weather in May »
Weather in June
June, the first month of the summer in Reston, is still a warm month, with an average temperature fluctuating between 63.3°F (17.4°C) and 82.9°F (28.3°C). June's onset brings a subtle temperature rise, moving from 74.8°F (23.8°C) in May to a still warm 82.9°F (28.3°C). Weather in June »
Weather in July
July is a hot summer month in Reston, Virginia, with temperature in the range of an average high of 87.6°F (30.9°C) and an average low of 68.5°F (20.3°C). Reston notes the warmest temperatures in July, with a high average of 87.6°F (30.9°C) and a low of 68.5°F (20.3°C). The heat index for July is evaluated at a torrid 98.6°F (37°C). Weather in July »
Weather in August
August, the last month of the summer in Reston, is also a moderately hot month, with temperature in the range of an average low of 67.3°F (19.6°C) and an average high of 85.6°F (29.8°C). The onset of August brings an average high-temperature of a warm 85.6°F (29.8°C), nearly matching the July temperature. Weather in August »
Weather in September
September, the first month of the autumn in Reston, is also a moderately hot month, with an average temperature fluctuating between 60.8°F (16°C) and 78.4°F (25.8°C). Reston, Virginia, in September undergoes a slight reduction in the average high-temperature, shifting from August's 85.6°F (29.8°C) to a still moderately hot 78.4°F (25.8°C). Weather in September »
Weather in October
October, like September, in Reston, Virginia, is another comfortable autumn month, with temperature in the range of an average low of 49.6°F (9.8°C) and an average high of 66.2°F (19°C). During the transition into October, Reston observes a decrease in the average high-temperature, falling from a moderately hot 78.4°F (25.8°C) in September to a comfortable 66.2°F (19°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Reston, Virginia, with temperature in the range of an average high of 53.4°F (11.9°C) and an average low of 38.7°F (3.7°C). Transition into November marks a drop in the average high-temperature, moving from a comfortable 66.2°F (19°C) in October to a fresh 53.4°F (11.9°C). Weather in November »
Weather in December
December, the first month of the winter in Reston, is also a frosty month, with an average temperature ranging between min 32.7°F (0.4°C) and max 45.3°F (7.4°C). Transition into December subtly marks a drop in the average high-temperature, moderately moving from a cool 53.4°F (11.9°C) in November to a frosty 45.3°F (7.4°C). Weather in December »
Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
Reston's coldest weather arrives in January, when temperatures average a high of 39.7°F (4.3°C) and a low of 26.4°F (-3.1°C).
What is the driest month?
January is the month with the least rainfall. Rain falls for 9.4 days and accumulates 1.77" (45mm) of precipitation.
How much does it rain?
In Reston, during the entire year, the rain falls for 152.8 days and collects up to 27.64" (702mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 4.6 days and accumulates 2.28" (58mm) of snow.
How much does it snow?
In Reston, Virginia, during the entire year, snow falls for 13.9 days and aggregates up to 7.2" (183mm) of snow.
What is the month with the least sunshine?
January, February and December, with an average of 5h of sunshine, are months with the least sunshine.
What are the months with the lowest UV index?
The months with the lowest UV index in Reston are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
When it does not snow?
May through October are months without snowfall.
When is the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
With an average of 14h and 54min of daylight, June has the longest days of the year.
What are the warmest months?
July is the month that records the highest temperatures, with averages ranging from a high of 87.6°F (30.9°C) to a low of 68.5°F (20.3°C).
What is the least humid month?
With an average relative humidity of 69%, July is the least humid month.
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.7h of sunshine.
What is the wettest month?
August is the month with the most rainfall. Rain falls for 15.6 days and accumulates 3.39" (86mm) of precipitation.
What is the most humid month?
October and December, with an average relative humidity of 76%, are most humid months.
What is the month with the shortest days in Reston?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Reston, VA
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (39.7°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure
Reston, VA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Reston, VA
- Average wind speed in January:
7.4mph - Average wind speed in February:
7.5mph - Average wind speed in March:
7.7mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.9mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.7mph - Average wind speed in December:
6.8mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity
Reston, VA
The months with the highest relative humidity are October and December (76%).
The month with the lowest relative humidity is July (69%).
Average rainfall
Reston, VA
- Average rainfall in January:
1.77" - Average rainfall in February:
1.89" - Average rainfall in March:
2.13" - Average rainfall in April:
2.24" - Average rainfall in May:
2.76" - Average rainfall in June:
2.36"
- Average rainfall in July:
2.68" - Average rainfall in August:
3.39" - Average rainfall in September:
1.93" - Average rainfall in October:
2.28" - Average rainfall in November:
2.05" - Average rainfall in December:
2.17"
The wettest month (with the highest rainfall) is August (3.39").
The driest month (with the least rainfall) is January (1.77").
Average rainfall days
Reston, VA
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
9.8 days - Average rainfall days in March:
13.4 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
15.6 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
12 days - Average rainfall days in November:
9.3 days - Average rainfall days in December:
9.8 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is November (9.3 days).
Average snowfall
Reston, VA
The month with the highest snowfall is January (2.28").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Reston, VA
- Average snowfall days in January:
4.6 days - Average snowfall days in February:
4.4 days - Average snowfall days in March:
2.3 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:
0.3 days - Average snowfall days in December:
2.2 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Reston, VA
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 0min - Average sunshine in February:
5h and 0min - Average sunshine in March:
6h and 4min - Average sunshine in April:
8h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 0min).
Average sunshine days
Reston, VA
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
15.1 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
13.9 days - Average sunshine days in August:
14.2 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
17.1 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
17.9 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (12.8 days).
Average UV index
Reston, VA
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Reston, VA
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Reston, VA
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).