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 is the coldest month, with the temperature often reaching an average high of 25.9°F (-3.4°C) and an average low of 13.3°F (-10.4°C).Humidity
January and February, with an average relative humidity of 86%, are the most humid months.Rainfall
In Grantham, New Hampshire, in January, it is raining for 8.3 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, in Grantham, there are 153.2 rainfall days, and 29.92" (760mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In January, it is snowing for 13.3 days. Throughout January, 8.62" (219mm) of snow is accumulated. In Grantham, during the entire year, snow falls for 65.4 days and aggregates up to 42.72" (1085mm) of snow.Daylight
In Grantham, the average length of the day in January is 9h and 23min.On the first day of January in Grantham, sunrise is at 7:21 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 4:57 pm EST.
Sunshine
The average sunshine in January is 4.3h.UV index
In January, the average daily maximum UV index in Grantham is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 2 in January transforms into the following instructions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
What are the coldest months in Grantham?
How cold is January in Grantham?
What are the most humid months in Grantham?
What is the average humidity in January in Grantham?
How much does it rain in Grantham in January?
How much does it snow in Grantham in January?
How many hours of daylight does Grantham have in January?
When are sunrise and sunset in January in Grantham?
How long on average sun shines in January in Grantham?
What is the UV index intensity in January in Grantham?
Average temperature in January
Grantham, NH
- Average high temperature in January: 25.9°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in January: 13.3°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in January
Grantham, NH
- Average pressure in January: 30.02"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Grantham, NH
- Average wind speed in January: 7.6mph
The windiest months (with the highest average wind speed) are January, February, March and April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in January
Grantham, NH
- Average humidity in January: 86%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (75%).
Average rainfall in January
Grantham, NH
- Average rainfall in January: 2.2"
The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in January
Grantham, NH
- Average rainfall days in January: 8.3 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in January
Grantham, NH
- Average snowfall in January: 8.62"
The month with the highest snowfall is February (11.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Grantham, NH
- Average snowfall days in January: 13.3 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Grantham, NH
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January: 4h and 2min
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 0min).
Average sunshine days in January
Grantham, NH
- Average sunshine days in January: 13.8 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in January
Grantham, NH
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in January
Grantham, NH
- Average cloud cover in January: 55
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in January
Grantham, NH
- Average visibility in January: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Grantham, New Hampshire, USA
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