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
January, with average temperatures reaching a high of 35.2°F (1.8°C) and a low of 22.1°F (-5.5°C), is the coldest month.Humidity
The average relative humidity in January is 76%.Rainfall
In Mercersburg, in January, it is raining for 10.3 days, with typically 2.2" (56mm) of accumulated precipitation. In Mercersburg, during the entire year, the rain falls for 170.5 days and collects up to 31.02" (788mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. January is the month with the most snowfall in Mercersburg. Snow falls for 9.9 days and accumulates 5.2" (132mm) of snow.Daylight
In Mercersburg, the average length of the day in January is 9h and 44min.On the first day of the month, sunrise is at 7:32 am and sunset at 4:57 pm. On the last day of January, sunrise is at 7:20 am and sunset at 5:29 pm EST.
Sunshine
With an average of 4.6h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index in Mercersburg, Pennsylvania, are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: In January, a daily maximum UV index of 2 leads to the following instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
What part of the year is the coldest in Mercersburg?
How cold is it in Mercersburg in January?
What is the average humidity in January in Mercersburg?
How many days does it rain in January in Mercersburg?
What is the snowiest month in Mercersburg?
How many days does it snow in January in Mercersburg?
How many hours of daylight does Mercersburg have in January?
What time are sunrise and sunset in January in Mercersburg?
What is the month with the least sunshine in Mercersburg?
How many hours of sunshine does Mercersburg have in January?
What is the month with the lowest UV index in Mercersburg?
What is the UV index reading in January in Mercersburg?
Average temperature in January
Mercersburg, PA
- Average high temperature in January: 35.2°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in January: 22.1°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in January
Mercersburg, PA
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in January
Mercersburg, PA
- Average wind speed in January: 7.5mph
The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in January
Mercersburg, PA
- Average humidity in January: 76%
The months with the highest relative humidity are February, May, October and December (79%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in January
Mercersburg, PA
- Average rainfall in January: 2.2"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in January
Mercersburg, PA
- Average rainfall days in January: 10.3 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in January
Mercersburg, PA
- Average snowfall in January: 5.2"
The month with the highest snowfall is January (5.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Mercersburg, PA
- Average snowfall days in January: 9.9 days
The month with the highest number of snowfall days is January (9.9 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
Mercersburg, PA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in January
Mercersburg, PA
- Average sunshine days in January: 14.4 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in January
Mercersburg, PA
- Average UV index in January: 2
The months with the highest UV index are May, June and July (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
Mercersburg, PA
- Average cloud cover in January: 50
The months with the most cloud cover are January, February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in January
Mercersburg, PA
- Average visibility in January: 5mi
The months with the highest visibility are April, June, July and November (6mi).
The months with the lowest visibility are January, February, March, May, August, September, October and December (5mi).
Mercersburg, Pennsylvania, USA
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