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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
Weather in January
January, like December, in McLean, Virginia, is a wintry winter month, with an average temperature varying between 40.1°F (4.5°C) and 26.8°F (-2.9°C). The coldest time of the year is January, with temperatures averaging a high of 40.1°F (4.5°C) and a low of 26.8°F (-2.9°C). Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in McLean, Virginia, with an average temperature varying between 44.6°F (7°C) and 29.5°F (-1.4°C). McLean experiences an average high-temperature of a frosty 44.6°F (7°C) in February, marking an insignificant shift from 40.1°F (4.5°C) in January. Weather in February »
Weather in March
March, the first month of the spring in McLean, is a fresh month, with an average temperature fluctuating between 52.7°F (11.5°C) and 36.9°F (2.7°C). As February gives way to March, the average high-temperature displays a slight ascent, adjusting from a chilly 44.6°F (7°C) to a cool 52.7°F (11.5°C). Weather in March »
Weather in April
April is a refreshing spring month in McLean, Virginia, with temperature in the range of an average high of 64.9°F (18.3°C) and an average low of 46.6°F (8.1°C). April's arrival sees a rise in the average high-temperature, jumping from March's fresh 52.7°F (11.5°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 warm month in McLean, Virginia, with an average temperature ranging between max 74.8°F (23.8°C) and min 55.9°F (13.3°C). May's arrival brings a temperature shift, moving from a comfortable 64.9°F (18.3°C) in April to a warm 74.8°F (23.8°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in McLean, Virginia, with an average temperature varying between 82.8°F (28.2°C) and 63.9°F (17.7°C). McLean observes a slight uplift in the average high-temperature with the onset of June, adjusting from May's 74.8°F (23.8°C) to a still moderately hot 82.8°F (28.2°C). Weather in June »
Weather in July
July is a hot summer month in McLean, Virginia, with an average temperature fluctuating between 69.1°F (20.6°C) and 87.4°F (30.8°C). During the warmest month, July, temperatures average a high of 87.4°F (30.8°C) and a low of 69.1°F (20.6°C). For July, the heat index is appraised at a sweltering 98.6°F (37°C). Weather in July »
Weather in August
August, the last month of the summer in McLean, is another warm month, with an average temperature ranging between max 85.6°F (29.8°C) and min 67.6°F (19.8°C). The start of August marks an average high-temperature of a moderately hot 85.6°F (29.8°C), hardly distinguishable from the conditions in July. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in McLean, Virginia, with temperature in the range of an average high of 78.6°F (25.9°C) and an average low of 61.2°F (16.2°C). With September's onset, the weather reveals a slight temperature decrease, transitioning from 85.6°F (29.8°C) in August to a still moderately hot 78.6°F (25.9°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in McLean, Virginia, with an average temperature varying between 50.7°F (10.4°C) and 66.4°F (19.1°C). McLean's progression into October includes a drop in the average high-temperature, from a moderately hot 78.6°F (25.9°C) in September to a refreshing 66.4°F (19.1°C). Weather in October »
Weather in November
November, the last month of the autumn in McLean, is another cool month, with an average temperature varying between 39°F (3.9°C) and 54.1°F (12.3°C). McLean's November weather comes with a decrease in average high-temperatures, moving from an enjoyable 66.4°F (19.1°C) in October to a cool 54.1°F (12.3°C). Weather in November »
Weather in December
December, the first month of the winter in McLean, is still a chilly month, with an average temperature fluctuating between 45.5°F (7.5°C) and 33.1°F (0.6°C). The advent of December brings a slight shift in average high-temperature, moving from a fresh 54.1°F (12.3°C) in November to a chilly 45.5°F (7.5°C). Weather in December »
Updated: Jun 27, 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 in McLean?
McLean's January weather reaches an average high of 40.1°F (4.5°C) and an average low of 26.8°F (-2.9°C), making it the coldest month.
What is the driest month?
The months with the least rainfall are January and September Rain falls for 6 days and accumulates 0.51" (13mm) of rain.
How much does it rain?
In McLean, during the entire year, the rain falls for 109 days and collects up to 9.29" (236mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 2.7 days and accumulates 0.98" (25mm) of snow.
How many days does it snow?
In McLean, Virginia, during the entire year, snow falls for 10.3 days and aggregates up to 2.28" (58mm) of snow.
What are the months with the lowest UV index?
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What are the months with the least sunshine?
The months with the least sunshine are February and December, with an average of 5.1h of sunshine.
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 in McLean.
What is the month with the highest UV index?
May through August, with an average maximum UV index of 6, are months with the highest UV index in McLean.
When are the longest days?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What part of the year is the hottest?
McLean's July weather, marked by an average high temperature of 87.4°F (30.8°C) and an average low temperature of 69.1°F (20.6°C), is the warmest in the year.
What is the least humid month?
July is the least humid month in McLean, with an average relative humidity of 70%.
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.9h of sunshine.
What is the wettest month?
The month with the most rainfall is August, when the rain falls for 13 days and typically aggregates up to 1.5" (38mm) 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?
December has the shortest days of the year in McLean, with an average of 9h and 30min of daylight.
Average temperature
McLean, VA
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (40.1°F).
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure
McLean, VA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"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
McLean, 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:
6.8mph - 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
McLean, VA
The months with the highest relative humidity are October and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall
McLean, VA
- Average rainfall in January:
0.51" - Average rainfall in February:
0.55" - Average rainfall in March:
0.63" - Average rainfall in April:
0.75" - Average rainfall in May:
0.75" - Average rainfall in June:
0.94"
- Average rainfall in July:
1.18" - Average rainfall in August:
1.5" - Average rainfall in September:
0.51" - Average rainfall in October:
0.67" - Average rainfall in November:
0.63" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is August (1.5").
The driest months (with the least rainfall) are January and September (0.51").
Average rainfall days
McLean, VA
- Average rainfall days in January:
6 days - Average rainfall days in February:
6.3 days - Average rainfall days in March:
9.2 days - Average rainfall days in April:
10.8 days - Average rainfall days in May:
10.8 days - Average rainfall days in June:
11.3 days
- Average rainfall days in July:
13.5 days - Average rainfall days in August:
13 days - Average rainfall days in September:
8.1 days - Average rainfall days in October:
7.5 days - Average rainfall days in November:
5.6 days - Average rainfall days in December:
6.9 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (5.6 days).
Average snowfall
McLean, VA
The month with the highest snowfall is January (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
McLean, VA
- Average snowfall days in January:
2.7 days - Average snowfall days in February:
3.6 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.2 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:
1.2 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
McLean, 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 1min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 5min - Average sunshine in April:
9h and 0min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 5min - Average sunshine in December:
5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days
McLean, VA
- Average sunshine days in January:
22.1 days - Average sunshine days in February:
18.3 days - Average sunshine days in March:
18.3 days - Average sunshine days in April:
16.8 days - Average sunshine days in May:
16.6 days - Average sunshine days in June:
15.9 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
14.9 days - Average sunshine days in September:
19.1 days - Average sunshine days in October:
21.4 days - Average sunshine days in November:
23 days - Average sunshine days in December:
22 days
The month with the most sunshine days is November (23 days).
The month with the least sunshine days is July (14.3 days).
Average UV index
McLean, 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, November and December (UV index 2).
Average cloud cover
McLean, VA
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility
McLean, 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).
McLean, Virginia, USA
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