Expand
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, the same as December, is another cold winter month in Herndon, West Virginia, with an average temperature ranging between max 38.3°F (3.5°C) and min 24.8°F (-4°C). In Herndon, the month of January registers the lowest temperatures, averaging 38.3°F (3.5°C) at the peak and 24.8°F (-4°C) at the lowest. Weather in January »
Weather in February
February, the last month of the winter in Herndon, is another cold month, with an average temperature varying between 27.5°F (-2.5°C) and 42.6°F (5.9°C). The commencement of February notes an average high-temperature of a still icy 42.6°F (5.9°C), exhibiting little difference from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Herndon, is a cool month, with an average temperature ranging between max 51.1°F (10.6°C) and min 34.5°F (1.4°C). A slight uplift in the average high-temperature marks March, adjusting from February's wintry 42.6°F (5.9°C) to a fresh 51.1°F (10.6°C). Weather in March »
Weather in April
April is an enjoyable spring month in Herndon, West Virginia, with an average temperature fluctuating between 62.8°F (17.1°C) and 43.5°F (6.4°C). Herndon's transition into April sees a rise in the average high-temperature, advancing from a cool 51.1°F (10.6°C) in March to a comfortable 62.8°F (17.1°C). Weather in April »
Weather in May
May, the last month of the spring in Herndon, is a pleasant month, with an average temperature ranging between max 72.1°F (22.3°C) and min 51.6°F (10.9°C). The shift from April to May sees an increase in the average high-temperature, transitioning from a comfortable 62.8°F (17.1°C) to an agreeable 72.1°F (22.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Herndon, West Virginia, with an average temperature ranging between max 79.3°F (26.3°C) and min 56.7°F (13.7°C). Entering June, Herndon notices a subtle temperature elevation, with the average high-temperature advancing from May's pleasant 72.1°F (22.3°C) to a moderately hot 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Herndon, West Virginia, with an average temperature varying between 82.8°F (28.2°C) and 60.1°F (15.6°C). In Herndon, the highest average temperatures are observed in July, with a high of 82.8°F (28.2°C) and a low of 60.1°F (15.6°C). July's heat index is estimated at a tropical 89.6°F (32°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Herndon, West Virginia, with an average temperature ranging between max 82°F (27.8°C) and min 58.5°F (14.7°C). Herndon's average high-temperature marks a still warm 82°F (27.8°C) with the advent of August, closely mirroring that of the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Herndon, West Virginia, with temperature in the range of an average high of 75.9°F (24.4°C) and an average low of 54.1°F (12.3°C). Herndon's transition into September involves a gentle shift in temperature, receding from 82°F (27.8°C) in August to a still warm 75.9°F (24.4°C). Weather in September »
Weather in October
October, like September, in Herndon, West Virginia, is another refreshing autumn month, with temperature in the range of an average high of 63.7°F (17.6°C) and an average low of 45°F (7.2°C). October's arrival corresponds with a decrease in average high-temperatures, from September's moderately hot 75.9°F (24.4°C) to a comfortable 63.7°F (17.6°C). Weather in October »
Weather in November
November, the last month of the autumn in Herndon, is another cool month, with an average temperature fluctuating between 34.7°F (1.5°C) and 52°F (11.1°C). November's onset brings a reduction in the average high-temperature, from a comfortable 63.7°F (17.6°C) in October to a fresh 52°F (11.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Herndon, West Virginia, with an average temperature ranging between min 30.7°F (-0.7°C) and max 43.5°F (6.4°C). Herndon experiences a moderate temperature shift at the start of December, with average high-temperatures adjusting a bit from a fresh 52°F (11.1°C) in November to a frosty 43.5°F (6.4°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Herndon?
Herndon's coldest temperatures are experienced in January, with average high temperatures of 38.3°F (3.5°C) and lows of 24.8°F (-4°C).
How many days does it rain in Herndon?
In Herndon, during the entire year, the rain falls for 180.7 days and collects up to 32.24" (819mm) of precipitation.
When does it snow in Herndon?
January through May, October through December are months with snowfall in Herndon.
How many days does it snow in Herndon?
In Herndon, during the entire year, snow falls for 50.3 days and aggregates up to 27.09" (688mm) of snow.
What is the month with the least sunshine in Herndon?
With an average of 4.2h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Herndon?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Herndon.
What is the most humid month in Herndon?
With an average relative humidity of 83%, February is the most humid month.
What is the rainiest month in Herndon?
The wettest months are February and May, with an average 3.43" (87mm) of rainfall.
What is the snowiest month in Herndon?
The month with the most snowfall in Herndon, West Virginia, is February, when snow falls for 11.7 days and typically aggregates up to 6.02" (153mm) of snow.
When is Daylight Saving Time (DST) in Herndon?
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.
What are the least humid months in Herndon?
June through August and November, with an average relative humidity of 77%, are the least humid months in Herndon.
When it does not snow in Herndon?
June through September are months without snowfall in Herndon.
When are the longest days in Herndon?
The month with the longest days in Herndon, West Virginia, is June, with an average of 14h and 42min of daylight.
When is the highest UV index in Herndon?
The months with the highest UV index in Herndon, West Virginia, are June and August, with an average maximum UV index of 6.
What is the warmest month in Herndon?
In Herndon, the average highest temperatures are observed in July, with a high of 82.8°F (28.2°C) and a low of 60.1°F (15.6°C).
What month has the most sunshine in Herndon?
August has the most sunshine of the year, with an average of 10.1h of sunshine.
What is the driest month in Herndon?
September is the month with the least rainfall in Herndon. Rain falls for 15.5 days and accumulates 1.57" (40mm) of precipitation.
What is the month with the shortest days in Herndon?
The month with the shortest days is December, with an average of 9h and 36min of daylight.
Average temperature
Herndon, WV
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (38.3°F).
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure
Herndon, WV
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.1"Hg - Average pressure in April:
30"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
29.99"Hg
- Average pressure in July:
30.02"Hg - Average pressure in August:
30.03"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.07"Hg - Average pressure in November:
30.16"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed
Herndon, WV
- Average wind speed in January:
7.4mph - Average wind speed in February:
7.3mph - Average wind speed in March:
6.8mph - Average wind speed in April:
7.1mph - Average wind speed in May:
5.9mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
4.6mph - Average wind speed in August:
4.2mph - Average wind speed in September:
4.5mph - Average wind speed in October:
5.5mph - Average wind speed in November:
5.8mph - Average wind speed in December:
6.6mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity
Herndon, WV
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall
Herndon, WV
- Average rainfall in January:
2.68" - Average rainfall in February:
3.43" - Average rainfall in March:
2.95" - Average rainfall in April:
2.99" - Average rainfall in May:
3.43" - Average rainfall in June:
2.56"
- Average rainfall in July:
2.64" - Average rainfall in August:
2.13" - Average rainfall in September:
1.57" - Average rainfall in October:
2.68" - Average rainfall in November:
2.05" - Average rainfall in December:
3.15"
The wettest months (with the highest rainfall) are February and May (3.43").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days
Herndon, WV
- Average rainfall days in January:
12.2 days - Average rainfall days in February:
11.8 days - Average rainfall days in March:
15.9 days - Average rainfall days in April:
17.3 days - Average rainfall days in May:
20.1 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
18.3 days - Average rainfall days in August:
15.6 days - Average rainfall days in September:
15.5 days - Average rainfall days in October:
13 days - Average rainfall days in November:
11.3 days - Average rainfall days in December:
12.4 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11.3 days).
Average snowfall
Herndon, WV
- Average snowfall in January:
5.94" - Average snowfall in February:
6.02" - Average snowfall in March:
5.47" - Average snowfall in April:
1.3" - Average snowfall in May:
0.43" - Average snowfall in June:
0"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Herndon, WV
- Average snowfall days in January:
13.1 days - Average snowfall days in February:
11.7 days - Average snowfall days in March:
7.2 days - Average snowfall days in April:
1.9 days - Average snowfall days in May:
0.3 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:
1.2 days - Average snowfall days in November:
4.4 days - Average snowfall days in December:
10.5 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Herndon, WV
- 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 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 3min - 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 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
5h and 0min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 2min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Herndon, WV
- Average sunshine days in January:
9.7 days - Average sunshine days in February:
8.3 days - Average sunshine days in March:
10.2 days - Average sunshine days in April:
9.9 days - Average sunshine days in May:
9.6 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
10.2 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
12.1 days - Average sunshine days in October:
15.7 days - Average sunshine days in November:
15.8 days - Average sunshine days in December:
11.7 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index
Herndon, WV
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Herndon, WV
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility
Herndon, WV
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Herndon, West Virginia, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
