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 35.8°F (2.1°C) and lows at 23.4°F (-4.8°C).Humidity
In Grantley, the average relative humidity in January is 77%.Rainfall
In Grantley, during January, the rain falls for 6.3 days and regularly aggregates up to 1.38" (35mm) of precipitation. In Grantley, Pennsylvania, during the entire year, the rain falls for 139.8 days and collects up to 22.95" (583mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Grantley. In Grantley, during January, snow falls for 4.3 days and regularly aggregates up to 2.13" (54mm) of snow. Throughout the year, in Grantley, there are 18.4 snowfall days, and 9.13" (232mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 43min.On the first day of the month, sunrise is at 7:28 am and sunset at 4:52 pm. On the last day of January, in Grantley, sunrise is at 7:16 am and sunset at 5:24 pm EST.
Sunshine
The average sunshine in January is 4.9h.UV index
The months with the lowest UV index in Grantley are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 2 during January translates into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What time of the year is the coldest in Grantley?
How cold is it in Grantley in January?
What is the average humidity in January in Grantley?
How much does it rain in Grantley in January?
How much does it snow in Grantley in January?
What is the average length of the day in January in Grantley?
What time are sunrise and sunset in January in Grantley?
How many hours of sunshine does Grantley have in January?
What is the month with the lowest UV index in Grantley?
How high is the UV index in January in Grantley?
Average temperature in January
Grantley, PA
- Average high temperature in January: 35.8°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in January: 23.4°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in January
Grantley, PA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Grantley, PA
- Average wind speed in January: 8.8mph
The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in January
Grantley, PA
- Average humidity in January: 77%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are March, April and November (76%).
Average rainfall in January
Grantley, PA
- Average rainfall in January: 1.38"
The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in January
Grantley, PA
- Average rainfall days in January: 6.3 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in January
Grantley, PA
- Average snowfall in January: 2.13"
The month with the highest snowfall is March (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Grantley, PA
- Average snowfall days in January: 4.3 days
The month with the highest number of snowfall days is February (5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Grantley, PA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
Grantley, PA
- Average sunshine days in January: 20.4 days
The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in January
Grantley, PA
- 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
Grantley, PA
- Average cloud cover in January: 46
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in January
Grantley, PA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Grantley, Pennsylvania, USA
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