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
Heidelberg's January weather, marked by an average high temperature of 33.4°F (0.8°C) and an average low temperature of 21°F (-6.1°C), is the coldest in the year.Humidity
In Heidelberg, the average relative humidity in January is 84%.Rainfall
In January, the rain falls for 7.3 days. Throughout January, 0.71" (18mm) of precipitation is accumulated. In Heidelberg, during the entire year, the rain falls for 132.6 days and collects up to 11.5" (292mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In January, it is snowing for 9.3 days. Throughout January, 0.83" (21mm) of snow is accumulated. Throughout the year, there are 32.5 snowfall days, and 3.66" (93mm) of snow is accumulated.Daylight
In Heidelberg, the average length of the day in January is 9h and 41min.On the first day of the month, sunrise is at 7:43 am and sunset at 5:04 pm. On the last day of January, sunrise is at 7:30 am and sunset at 5:36 pm EST.
Sunshine
January has the least sunshine of the year in Heidelberg, Pennsylvania, with an average of 3h of sunshine.UV index
In Heidelberg, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 2 in January interprets into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. 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 part of the year is the coldest?
How cold is January?
What is the average humidity in January?
How much does it rain in January?
How much 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 many hours of sunshine does Heidelberg have in January?
What is the UV index reading in January?
Average temperature in January
Heidelberg, PA
- Average high temperature in January: 33.4°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in January: 21°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in January
Heidelberg, PA
- Average pressure in January: 30.11"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
Heidelberg, PA
- Average wind speed in January: 7.9mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in January
Heidelberg, PA
- Average humidity in January: 84%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (75%).
Average rainfall in January
Heidelberg, PA
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is November (0.67").
Average rainfall days in January
Heidelberg, PA
- Average rainfall days in January: 7.3 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in January
Heidelberg, PA
- Average snowfall in January: 0.83"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Heidelberg, PA
- Average snowfall days in January: 9.3 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Heidelberg, 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 18min).
- Average sunshine in January: 3h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in January
Heidelberg, PA
- Average sunshine days in January: 17.6 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.2 days).
Average UV index in January
Heidelberg, PA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Heidelberg, PA
- Average cloud cover in January: 68
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in January
Heidelberg, PA
- Average visibility in January: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Heidelberg, Pennsylvania, USA
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