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, characterized by an average high temperature of 24.4°F (-4.2°C) and a low temperature of 10.4°F (-12°C), is generally the coldest month.Humidity
In January, the average relative humidity in Chatham is 86%.Rainfall
In Chatham, during January, the rain falls for 11.9 days and regularly aggregates up to 1.22" (31mm) of precipitation. In Chatham, New Hampshire, during the entire year, the rain falls for 158 days and collects up to 18.58" (472mm) of precipitation.Snowfall
Months with snowfall in Chatham are January through May, October through December. In Chatham, New Hampshire, during January, snow falls for 14.5 days and regularly aggregates up to 5.28" (134mm) of snow. In Chatham, New Hampshire, during the entire year, snow falls for 64.6 days and aggregates up to 25.31" (643mm) of snow.Daylight
In Chatham, New Hampshire, the average length of the day in January is 9h and 20min.On the first day of the month, sunrise is at 7:19 am and sunset at 4:15 pm. On the last day of January, sunrise is at 7:03 am and sunset at 4:51 pm EST.
Sunshine
In January, the average sunshine in Chatham, New Hampshire, is 4.8h.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Chatham, New Hampshire. 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: The maximum UV index of 2 during January leads to these instructions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. On your guard! Snow's reflection can almost 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 month is the coldest in Chatham?
How cold is January in Chatham?
What is the average humidity in January in Chatham?
How many days does it rain in January in Chatham?
How many days does it snow in January in Chatham?
What is the average length of the day in January in Chatham?
When are sunrise and sunset in January in Chatham?
How long on average sun shines in January in Chatham?
What is the month with the lowest UV index in Chatham?
What is the UV index intensity in January in Chatham?
Average temperature in January
Chatham, NH
- Average high temperature in January: 24.4°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in January: 10.4°F
The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is January (10.4°F).
Average pressure in January
Chatham, NH
- Average pressure in January: 29.99"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Chatham, NH
- Average wind speed in January: 6.8mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in January
Chatham, NH
- Average humidity in January: 86%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are May and November (77%).
Average rainfall in January
Chatham, NH
- Average rainfall in January: 1.22"
The wettest months (with the highest rainfall) are April and October (2.17").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in January
Chatham, NH
- Average rainfall days in January: 11.9 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (9.8 days).
Average snowfall in January
Chatham, NH
- Average snowfall in January: 5.28"
The month with the highest snowfall is February (6.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Chatham, NH
- Average snowfall days in January: 14.5 days
The months with the highest number of snowfall days are January and February (14.5 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, NH
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January: 4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in January
Chatham, NH
- Average sunshine days in January: 12.4 days
The month with the most sunshine days is September (16.5 days).
The month with the least sunshine days is April (10.1 days).
Average UV index in January
Chatham, NH
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in January
Chatham, NH
- Average cloud cover in January: 49
The month with the most cloud cover is February (Cloud cover 53).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in January
Chatham, NH
- Average visibility in January: 4mi
The months with the highest visibility are April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March and September (4mi).
Chatham, New Hampshire, USA
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