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
Porters Mill witnesses the coldest weather in January, with temperatures averaging a high of 35.4°F (1.9°C) and a low of 23.2°F (-4.9°C).Humidity
The average relative humidity in January in Porters Mill, Pennsylvania, is 77%.Rainfall
In Porters Mill, in January, during 7.3 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, there are 146.5 rainfall days, and 27.87" (708mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In January, in Porters Mill, Pennsylvania, it is snowing for 5.8 days. Throughout January, 2.64" (67mm) of snow is accumulated. In Porters Mill, during the entire year, snow falls for 19.1 days and aggregates up to 11.54" (293mm) of snow.Daylight
In January, the average length of the day in Porters Mill is 9h and 42min.On the first day of the month, sunrise is at 7:24 am and sunset at 4:47 pm. On the last day of January, sunrise is at 7:12 am and sunset at 5:19 pm EST.
Sunshine
In Porters Mill, the average sunshine in January is 4.8h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Porters Mill. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In January, a daily maximum UV index of 2 leads to the following instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Porters Mill?
How cold is January in Porters Mill?
What is the average humidity in January in Porters Mill?
How many days does it rain in January in Porters Mill?
How many days does it snow in January in Porters Mill?
What is the average length of the day in January in Porters Mill?
What time are sunrise and sunset in January in Porters Mill?
How many hours of sunshine does Porters Mill have in January?
What are the months with the lowest UV index in Porters Mill?
How high is the UV index in January in Porters Mill?
Average temperature in January
Porters Mill, PA
- Average high temperature in January: 35.4°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in January: 23.2°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 (23.2°F).
Average pressure in January
Porters Mill, PA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Porters Mill, PA
- Average wind speed in January: 8mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in January
Porters Mill, PA
- Average humidity in January: 77%
The months with the highest relative humidity are February and October (80%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in January
Porters Mill, PA
- Average rainfall in January: 1.85"
The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in January
Porters Mill, PA
- Average rainfall days in January: 7.3 days
The months with the highest number of rainy days are May and July (17 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in January
Porters Mill, PA
- Average snowfall in January: 2.64"
The month with the highest snowfall is March (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Porters Mill, PA
- Average snowfall days in January: 5.8 days
The month with the highest number of snowfall days is January (5.8 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
Porters Mill, 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
Porters Mill, PA
- Average sunshine days in January: 18.7 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in January
Porters Mill, 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, March, November and December (UV index 2).
Average cloud cover in January
Porters Mill, PA
- Average cloud cover in January: 46
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in January
Porters Mill, 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).
Porters Mill, Pennsylvania, USA
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