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 proves to be the coldest month, recording an average maximum temperature of 32.5°F (0.3°C) and a minimum temperature of 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. Throughout the year, in Grafton, there are 152.2 rainfall days, and 30.67" (779mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Grafton, in January, during 8.4 snowfall days, 3.9" (99mm) of snow is typically accumulated. Throughout the year, in Grafton, Massachusetts, there are 32.5 snowfall days, and 18.78" (477mm) of snow is accumulated.Daylight
The average length of the day in January 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 January, the average sunshine in Grafton is 5h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily high UV index of 2 in January leads to these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What is the coldest time of year in Grafton?
How cold is January in Grafton?
What is the average humidity in January in Grafton?
How many days does it rain in January in Grafton?
How many days does it snow in January in Grafton?
What is the average length of the day in January in Grafton?
What time are sunrise and sunset in January in Grafton?
How long on average sun shines in January in Grafton?
What are the months with the lowest UV index in Grafton?
How high is the UV index in January in Grafton?
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
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