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 an average high of 36.9°F (2.7°C) and a low of 24.6°F (-4.1°C), signifies the coldest month of the year.Humidity
In Chatham, the average relative humidity in January is 76%.Rainfall
The months with the least rainfall are January, September and November Rain falls for 5.9 days and accumulates 0.87" (22mm) of rain.Snowfall
Months with snowfall are January through May, November and December. In Chatham, in January, snow falls for 5.1 days, with typically accumulated 1.18" (30mm) of snow. In Chatham, during the entire year, snow falls for 15.4 days and aggregates up to 4.33" (110mm) of snow.Daylight
The average length of the day in January is 9h and 44min.On the first day of the month, sunrise is at 7:24 am and sunset at 4:48 pm. On the last day of January, sunrise is at 7:12 am and sunset at 5:20 pm EST.
Sunshine
In January, the average sunshine is 5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 2 during January translates into the following directions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. 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 are the coldest months in Chatham?
How cold is January?
What is the average humidity in January?
What is the driest month?
How much does it rain in Chatham in January?
How many days does it snow in January?
How many hours of daylight does Chatham have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Chatham have in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Chatham, PA
- Average high temperature in January: 36.9°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 (36.9°F).
- Average low temperature in January: 24.6°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in January
Chatham, PA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Chatham, PA
- Average wind speed in January: 8.7mph
The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in January
Chatham, PA
- Average humidity in January: 76%
The months with the highest relative humidity are February, May, September, October and December (79%).
The months with the lowest relative humidity are March and April (75%).
Average rainfall in January
Chatham, PA
- Average rainfall in January: 0.87"
The wettest month (with the highest rainfall) is August (1.93").
The driest months (with the least rainfall) are January, September and November (0.87").
Average rainfall days in January
Chatham, PA
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in January
Chatham, PA
- Average snowfall in January: 1.18"
The month with the highest snowfall is March (1.26").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Chatham, PA
- Average snowfall days in January: 5.1 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Chatham, 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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in January
Chatham, PA
- Average sunshine days in January: 20.3 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in January
Chatham, 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, November and December (UV index 2).
Average cloud cover in January
Chatham, PA
- Average cloud cover in January: 45
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in January
Chatham, PA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Chatham, Pennsylvania, USA
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