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
January is the month that records the lowest temperatures, with averages ranging from a high of 30.6°F (-0.8°C) to a low of 18°F (-7.8°C).Humidity
In January, the average relative humidity is 83%.Rainfall
In West Decatur, in January, during 8.1 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 159 rainfall days, and 23.46" (596mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. January is the month with the most snowfall. Snow falls for 18.3 days and accumulates 6.02" (153mm) of snow.Daylight
The average length of the day in January in West Decatur is 9h and 38min.On the first day of January in West Decatur, sunrise is at 7:37 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:28 pm EST.
Sunshine
January has the least sunshine of the year in West Decatur, with an average of 3.4h of sunshine.UV index
In West Decatur, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during January translates into these guidelines:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Frequently asked questions
What month is the coldest in West Decatur?
How cold is it in West Decatur in January?
What is the average humidity in January in West Decatur?
How many days does it rain in January in West Decatur?
What is the snowiest month in West Decatur?
How much does it snow in West Decatur in January?
What is the average length of the day in January in West Decatur?
What time are sunrise and sunset in January in West Decatur?
What is the month with the least sunshine in West Decatur?
How many hours of sunshine does West Decatur have in January?
How high is the UV index in January in West Decatur?
Average temperature in January
West Decatur, PA
- Average high temperature in January: 30.6°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in January: 18°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in January
West Decatur, PA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in January
West Decatur, PA
- Average wind speed in January: 8.5mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in January
West Decatur, PA
- Average humidity in January: 83%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is July (76%).
Average rainfall in January
West Decatur, PA
- Average rainfall in January: 1.57"
The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is November (1.42").
Average rainfall days in January
West Decatur, PA
- Average rainfall days in January: 8.1 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in January
West Decatur, PA
- Average snowfall in January: 6.02"
The month with the highest snowfall is January (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
West Decatur, PA
- Average snowfall days in January: 18.3 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
West Decatur, PA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 3h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in January
West Decatur, PA
- Average sunshine days in January: 9.7 days
The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in January
West Decatur, PA
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
West Decatur, PA
- Average cloud cover in January: 67
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in January
West Decatur, PA
- Average visibility in January: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).
West Decatur, Pennsylvania, USA
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