Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
October suggests a modest reduction in the average high-temperature, shifting from a warm 75.9°F (24.4°C) in September to a refreshing 63.7°F (17.6°C). Throughout October, Herndon registers a consistent average low-temperature of 45°F (7.2°C).Humidity
The average relative humidity in October is 79%.Rainfall
In Herndon, during October, the rain falls for 13 days and regularly aggregates up to 2.68" (68mm) of precipitation. Throughout the year, there are 180.7 rainfall days, and 32.24" (819mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 1.2 snowfall days, it receives 0.83" (21mm) of snow. In Herndon, West Virginia, during the entire year, snow falls for 50.3 days and aggregates up to 27.09" (688mm) of snow.Daylight
In Herndon, the average length of the day in October is 11h and 13min.On the first day of the month, sunrise is at 7:21 am and sunset at 7:08 pm. On the last day of October, sunrise is at 7:49 am and sunset at 6:27 pm EDT.
Sunshine
In October, the average sunshine is 5.9h.UV index
The average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In October, the maximum UV index of 3 translates into these guidelines:
Ensure safety - Imperative it is to shield skin and eyes from damage. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average October temperature in Herndon?
What is the average humidity in October?
How many days does it rain in October?
When does it start snowing?
How many hours of daylight does Herndon have in October?
When are sunrise and sunset in October?
How many hours of sunshine does Herndon have in October?
What is the UV index intensity in October?
Average temperature in October
Herndon, WV
- Average high temperature in October: 63.7°F
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).
- Average low temperature in October: 45°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 in October
Herndon, WV
- Average pressure in October: 30.07"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 in October
Herndon, WV
- Average wind speed in October: 5.5mph
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 in October
Herndon, WV
- Average humidity in October: 79%
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 in October
Herndon, WV
- Average rainfall in October: 2.68"
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 in October
Herndon, WV
- Average rainfall days in October: 13 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 in October
Herndon, WV
- Average snowfall in October: 0.83"
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 in October
Herndon, WV
- Average snowfall days in October: 1.2 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 in October /
Average sunshine in October
Herndon, WV
- Average daylight in October: 11h and 1min
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 October: 5h and 5min
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 in October
Herndon, WV
- Average sunshine days in October: 15.7 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 in October
Herndon, WV
- Average UV index in October: 3
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 in October
Herndon, WV
- Average cloud cover in October: 43
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 in October
Herndon, WV
- Average visibility in October: 5mi
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
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