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 readings reach their annual highs in January, averaging 30.6°F (-0.8°C) and a minimum average of 18.7°F (-7.4°C).Humidity
In January, the average relative humidity is 82%.Rainfall
In Plymouth, Pennsylvania, during January, the rain falls for 8.3 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Plymouth, during the entire year, the rain falls for 142.7 days and collects up to 13.19" (335mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Plymouth, in January, snow falls for 13.7 days, with typically accumulated 2.28" (58mm) of snow. In Plymouth, during the entire year, snow falls for 49.9 days and aggregates up to 9.92" (252mm) of snow.Daylight
In Plymouth, the average length of the day in January is 9h and 36min.On the first day of the month, sunrise is at 7:29 am and sunset at 4:45 pm. On the last day of January, sunrise is at 7:15 am and sunset at 5:18 pm EST.
Sunshine
January and February, with an average of 3.7h of sunshine, are months with the least sunshine.UV index
In January, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In January, a regular UV index of 2 translates into these guidelines:
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. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Experience reduced UV exposure by about half when donning a wide-brim hat. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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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 average humidity in January?
How many days 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 are the months with the least sunshine?
How long on average sun shines in January?
What is the UV index intensity in January?
Average temperature in January
Plymouth, PA
- Average high temperature in January: 30.6°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in January: 18.7°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 (18.7°F).
Average pressure in January
Plymouth, PA
- Average pressure in January: 30.08"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
Plymouth, PA
- Average wind speed in January: 8mph
The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in January
Plymouth, PA
- Average humidity in January: 82%
The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is April (77%).
Average rainfall in January
Plymouth, PA
- Average rainfall in January: 0.91"
The wettest month (with the highest rainfall) is July (1.5").
The driest month (with the least rainfall) is September (0.71").
Average rainfall days in January
Plymouth, PA
- Average rainfall days in January: 8.3 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in January
Plymouth, PA
- Average snowfall in January: 2.28"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Plymouth, PA
- Average snowfall days in January: 13.7 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Plymouth, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in January
Plymouth, PA
- Average sunshine days in January: 14.3 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is February (11.6 days).
Average UV index in January
Plymouth, 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
Plymouth, PA
- Average cloud cover in January: 60
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in January
Plymouth, PA
- Average visibility in January: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Plymouth, Pennsylvania, USA
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