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 readings reach their annual highs in January, averaging 33.6°F (0.9°C) and a minimum average of 21.9°F (-5.6°C).Humidity
In January, the average relative humidity in Mattapan is 77%.Rainfall
In January, in Mattapan, Massachusetts, the rain falls for 7.8 days. Throughout January, 2.32" (59mm) of precipitation is accumulated. Throughout the year, there are 147.4 rainfall days, and 28.39" (721mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mattapan are January through April, October through December. In January, it is snowing for 7.9 days. Throughout January, 3.39" (86mm) of snow is accumulated. In Mattapan, during the entire year, snow falls for 32.7 days and aggregates up to 22.01" (559mm) of snow.Daylight
In Mattapan, the average length of the day in January is 9h and 31min.On the first day of January in Mattapan, sunrise is at 7:13 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:56 pm EST.
Sunshine
The average sunshine in January is 5.1h.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 estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 during January leads to these advisories:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What is the coldest time of year in Mattapan?
How cold is it in Mattapan in January?
What is the average humidity in January in Mattapan?
How much does it rain in Mattapan in January?
How many days does it snow in January in Mattapan?
What is the average length of the day in January in Mattapan?
When are sunrise and sunset in January in Mattapan?
How many hours of sunshine does Mattapan have in January?
When is the lowest UV index in Mattapan?
What is the UV index intensity in January in Mattapan?
Average temperature in January
Mattapan, MA
- Average high temperature in January: 33.6°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in January: 21.9°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in January
Mattapan, 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
Mattapan, MA
- Average wind speed in January: 9.5mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in January
Mattapan, MA
- Average humidity in January: 77%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).
Average rainfall in January
Mattapan, MA
- Average rainfall in January: 2.32"
The wettest month (with the highest rainfall) is December (2.95").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in January
Mattapan, MA
- Average rainfall days in January: 7.8 days
The month with the highest number of rainy days is July (15.8 days).
The months with the least rainy days are January and February (7.8 days).
Average snowfall in January
Mattapan, MA
- Average snowfall in January: 3.39"
The month with the highest snowfall is March (5.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Mattapan, MA
- Average snowfall days in January: 7.9 days
The month with the highest number of snowfall days is February (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Mattapan, 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 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
Mattapan, MA
- Average sunshine days in January: 17.3 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in January
Mattapan, 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
Mattapan, 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 33).
Average visibility in January
Mattapan, MA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Mattapan, Massachusetts, USA
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