Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
During the coldest month, January, temperatures average a high of 38.3°F (3.5°C) and a low of 24.8°F (-4°C).Humidity
In Herndon Heights, the average relative humidity in January is 81%.Rainfall
In Herndon Heights, West Virginia, during January, the rain falls for 12.2 days and regularly aggregates up to 2.68" (68mm) of precipitation. Throughout the year, in Herndon Heights, there are 180.7 rainfall days, and 32.24" (819mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In January, it is snowing for 13.1 days. Throughout January, 5.94" (151mm) of snow is accumulated. In Herndon Heights, during the entire year, snow falls for 50.3 days and aggregates up to 27.09" (688mm) of snow.Daylight
In January, the average length of the day in Herndon Heights is 9h and 55min.On the first day of January in Herndon Heights, sunrise is at 7:39 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:47 pm EST.
Sunshine
With an average of 4.2h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index in Herndon Heights, West Virginia, are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 in January converts into the following recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
What is the coldest month in Herndon Heights?
Is it cold in Herndon Heights during January?
What is the average humidity in January in Herndon Heights?
How much does it rain in Herndon Heights in January?
How much does it snow in Herndon Heights in January?
How many hours of daylight does Herndon Heights have in January?
When are sunrise and sunset in January in Herndon Heights?
What is the month with the least sunshine in Herndon Heights?
How many hours of sunshine does Herndon Heights have in January?
What is the month with the lowest UV index in Herndon Heights?
What is the UV index intensity in January in Herndon Heights?
Average temperature in January
Herndon Heights, WV
- Average high temperature in January: 38.3°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 January: 24.8°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 January
Herndon Heights, WV
- Average pressure in January: 30.15"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 January
Herndon Heights, WV
- Average wind speed in January: 7.4mph
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 January
Herndon Heights, WV
- Average humidity in January: 81%
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 January
Herndon Heights, WV
- Average rainfall in January: 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 January
Herndon Heights, WV
- Average rainfall days in January: 12.2 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 January
Herndon Heights, WV
- Average snowfall in January: 5.94"
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 January
Herndon Heights, WV
- Average snowfall days in January: 13.1 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 January /
Average sunshine in January
Herndon Heights, WV
- Average daylight in January: 9h and 5min
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
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 January
Herndon Heights, WV
- Average sunshine days in January: 9.7 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 January
Herndon Heights, WV
- Average UV index in January: 2
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 January
Herndon Heights, WV
- Average cloud cover in January: 62
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 January
Herndon Heights, WV
- Average visibility in January: 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 Heights, West Virginia, USA
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