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
Bullis Mills's coldest month, January, generally records average temperatures ranging from a high of 27.9°F (-2.3°C) to a low of 15.8°F (-9°C).Humidity
January and February, with an average relative humidity of 89%, are the most humid months.Rainfall
In Bullis Mills, in January, during 6.8 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Bullis Mills, during the entire year, the rain falls for 168.9 days and collects up to 30" (762mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Bullis Mills. In Bullis Mills, in January, during 20.2 snowfall days, 8.15" (207mm) of snow is typically accumulated. Throughout the year, there are 92.6 snowfall days, and 43.58" (1107mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 32min.On the first day of the month, sunrise is at 7:41 am and sunset at 4:52 pm. On the last day of January, sunrise is at 7:27 am and sunset at 5:26 pm EST.
Sunshine
With an average of 2.3h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index in Bullis Mills are January, February and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during January translates into the following directions:
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. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
How cold is it in January?
What is the most humid month?
What is the average humidity in January?
How much does it rain in January?
How many days does it snow in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Bullis Mills, PA
- Average high temperature in January: 27.9°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in January: 15.8°F
The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in January
Bullis Mills, PA
- Average pressure in January: 30.07"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Bullis Mills, PA
- Average wind speed in January: 9.7mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in January
Bullis Mills, PA
- Average humidity in January: 89%
The months with the highest relative humidity are January and February (89%).
The months with the lowest relative humidity are May, June and July (79%).
Average rainfall in January
Bullis Mills, PA
- Average rainfall in January: 2.2"
The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in January
Bullis Mills, PA
- Average rainfall days in January: 6.8 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in January
Bullis Mills, PA
- Average snowfall in January: 8.15"
The month with the highest snowfall is February (10.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Bullis Mills, PA
- Average snowfall days in January: 20.2 days
The month with the highest number of snowfall days is January (20.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Bullis Mills, PA
- Average daylight in January: 9h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 2h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in January
Bullis Mills, PA
- Average sunshine days in January: 6.7 days
The month with the most sunshine days is September (12.4 days).
The month with the least sunshine days is February (5.9 days).
Average UV index in January
Bullis Mills, PA
- Average UV index in January: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in January
Bullis Mills, PA
- Average cloud cover in January: 79
The month with the most cloud cover is January (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 43).
Average visibility in January
Bullis Mills, PA
- Average visibility in January: 4mi
The months with the highest visibility are March, April, May, June, July, October and November (5mi).
The months with the lowest visibility are January, February, August, September and December (4mi).
Bullis Mills, Pennsylvania, USA
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