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
Temperature records mark January as the coldest month, with highs averaging 32.5°F (0.3°C) and lows at 20.5°F (-6.4°C).Humidity
The average relative humidity in January is 78%.Rainfall
In Grafton, in January, during 7.7 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. In Grafton, during the entire year, the rain falls for 152.2 days and collects up to 30.67" (779mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Grafton, in January, snow falls for 8.4 days, with typically accumulated 3.9" (99mm) of snow. In Grafton, during the entire year, snow falls for 32.5 days and aggregates up to 18.78" (477mm) of snow.Daylight
In January, the average length of the day in Grafton is 9h and 31min.On the first day of the month, sunrise is at 7:15 am and sunset at 4:25 pm. On the last day of January, sunrise is at 7:01 am and sunset at 4:59 pm EST.
Sunshine
In Grafton, the average sunshine in January is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 in January translates into these instructions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. 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 is the coldest month in Grafton?
How cold is it in January?
What is the average humidity in January in Grafton?
How many days does it rain in January?
How many days does it snow in January in Grafton?
What is the average length of the day in January?
When is the sunrise / sunset in January in Grafton?
How many hours of sunshine does Grafton have in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Grafton, MA
- Average high temperature in January: 32.5°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in January: 20.5°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 (20.5°F).
Average pressure in January
Grafton, MA
- 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 (29.93"Hg).
Average wind speed in January
Grafton, MA
- Average wind speed in January: 8.9mph
The windiest months (with the highest average wind speed) are January, February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in January
Grafton, MA
- Average humidity in January: 78%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall in January
Grafton, MA
- Average rainfall in January: 2.48"
The wettest month (with the highest rainfall) is December (3.15").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in January
Grafton, MA
- Average rainfall days in January: 7.7 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in January
Grafton, MA
- Average snowfall in January: 3.9"
The month with the highest snowfall is March (4.92").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Grafton, MA
- Average snowfall days in January: 8.4 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Grafton, MA
- Average daylight in January: 9h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 5h and 0min
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 36min).
Average sunshine days in January
Grafton, MA
- Average sunshine days in January: 16.5 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in January
Grafton, MA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (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
Grafton, MA
- Average cloud cover in January: 45
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in January
Grafton, MA
- Average visibility in January: 6mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
Grafton, Massachusetts, USA
Weather forecast for your location
2. Allow the app to use your location