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
Temperature records mark January as the coldest month, with highs averaging 38.1°F (3.4°C) and lows at 24.3°F (-4.3°C).Humidity
The average relative humidity in January in Harpers Ferry is 75%.Rainfall
The month with the least rainfall is January, when the rain falls for 9.1 days and typically collects 1.97" (50mm) of precipitation.Snowfall
Months with snowfall in Harpers Ferry are January through April, November and December. The month with the most snowfall is January, when snow falls for 6.9 days and typically aggregates up to 3.62" (92mm) of snow.Daylight
In Harpers Ferry, West Virginia, the average length of the day in January is 9h and 46min.On the first day of January, sunrise is at 7:30 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:29 pm EST.
Sunshine
The months with the least sunshine are January and February, with an average of 5h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is it in January?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
When does it snow the most?
How many days does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
What are the months with the least sunshine?
How many hours of sunshine does Harpers Ferry have in January?
When is the lowest UV index?
What is the UV index reading in January in Harpers Ferry?
Average temperature in January
Harpers Ferry, WV
- Average high temperature in January: 38.1°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (38.1°F).
- Average low temperature in January: 24.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in January
Harpers Ferry, WV
- Average pressure in January: 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 in January
Harpers Ferry, WV
- Average wind speed in January: 7.3mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in January
Harpers Ferry, WV
- Average humidity in January: 75%
The month with the highest relative humidity is October (79%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in January
Harpers Ferry, WV
- Average rainfall in January: 1.97"
The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is January (1.97").
Average rainfall days in January
Harpers Ferry, WV
- Average rainfall days in January: 9.1 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in January
Harpers Ferry, WV
- Average snowfall in January: 3.62"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Harpers Ferry, WV
- Average snowfall days in January: 6.9 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Harpers Ferry, WV
- Average daylight in January: 9h and 5min
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
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 0min).
Average sunshine days in January
Harpers Ferry, WV
- Average sunshine days in January: 16.6 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in January
Harpers Ferry, WV
- Average UV index in January: 2
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 in January
Harpers Ferry, WV
- Average cloud cover in January: 46
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in January
Harpers Ferry, WV
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, May, September, October and December (5mi).
Harpers Ferry, West Virginia, USA
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