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
Grafton's January weather, marked by an average high temperature of 25.9°F (-3.4°C) and an average low temperature of 12.7°F (-10.7°C), is the coldest in the year.Humidity
January and February, with an average relative humidity of 86%, are the most humid months.Rainfall
January is the month with the least rainfall. Rain falls for 4.3 days and accumulates 0.71" (18mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Grafton, in January, snow falls for 9.6 days, with typically accumulated 2.36" (60mm) of snow. Throughout the year, there are 43.2 snowfall days, and 14.49" (368mm) of snow is accumulated.Daylight
In Grafton, the average length of the day in January is 9h and 23min.On the first day of the month, sunrise is at 7:20 am and sunset at 4:21 pm. On the last day of January, sunrise is at 7:05 am and sunset at 4:57 pm EST.
Sunshine
The average sunshine in January is 4.4h.UV index
The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.Note: In January, the UV index of 2 transforms into the following advice:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be attentive! The reflective property of snow can nearly double 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?
How cold is January?
What are the most humid months?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
How much does it snow in January?
How many hours of daylight does Grafton have in January?
When are sunrise and sunset in January?
How long on average sun shines in January?
What is the UV index reading in January?
Average temperature in January
Grafton, NH
- Average high temperature in January: 25.9°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in January: 12.7°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in January
Grafton, NH
- Average pressure in January: 30.01"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
Grafton, NH
- Average wind speed in January: 7.6mph
The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in January
Grafton, NH
- Average humidity in January: 86%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in January
Grafton, NH
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is October (1.54").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in January
Grafton, NH
- Average rainfall days in January: 4.3 days
The month with the highest number of rainy days is July (11.6 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in January
Grafton, NH
- Average snowfall in January: 2.36"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Grafton, NH
- Average snowfall days in January: 9.6 days
The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Grafton, 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
Grafton, NH
- Average sunshine days in January: 19.6 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is February (16.1 days).
Average UV index in January
Grafton, 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
Grafton, NH
- Average cloud cover in January: 53
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in January
Grafton, NH
- Average visibility in January: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).
Grafton, New Hampshire, USA
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