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
In Derby, the month of January is known for its lowest average temperatures, reaching a high of 34.7°F (1.5°C) and a low of 24.6°F (-4.1°C).Humidity
The average relative humidity in January is 75%.Rainfall
In Derby, in January, during 9.4 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 169.1 rainfall days, and 36.26" (921mm) of precipitation is accumulated.Snowfall
Months with snowfall in Derby are January through April, November and December. In Derby, during January, snow falls for 7.5 days and regularly aggregates up to 2.24" (57mm) of snow. Throughout the year, in Derby, there are 27.3 snowfall days, and 11.42" (290mm) of snow is accumulated.Daylight
In Derby, the average length of the day in January is 9h and 36min.On the first day of the month, sunrise is at 7:18 am and sunset at 4:33 pm. On the last day of January, sunrise is at 7:04 am and sunset at 5:06 pm EST.
Sunshine
The average sunshine in January in Derby is 5.1h.UV index
The months with the lowest UV index in Derby are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In January, the maximum UV index of 2 transforms into these recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Derby?
How cold is January in Derby?
What is the average humidity in January in Derby?
How many days does it rain in January in Derby?
How much does it snow in Derby in January?
How many hours of daylight does Derby have in January?
When are sunrise and sunset in January in Derby?
How long on average sun shines in January in Derby?
What is the month with the lowest UV index in Derby?
What is the UV index intensity in January in Derby?
Average temperature in January
Derby, CT
- Average high temperature in January: 34.7°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (34.7°F).
- Average low temperature in January: 24.6°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in January
Derby, CT
- Average pressure in January: 30.04"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Derby, CT
- Average wind speed in January: 9.6mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in January
Derby, CT
- Average humidity in January: 75%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (72%).
Average rainfall in January
Derby, CT
- Average rainfall in January: 2.48"
The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in January
Derby, CT
- Average rainfall days in January: 9.4 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in January
Derby, CT
- Average snowfall in January: 2.24"
The month with the highest snowfall is February (3.23").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Derby, CT
- Average snowfall days in January: 7.5 days
The month with the highest number of snowfall days is February (7.8 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
Derby, CT
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 5h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
Derby, CT
- Average sunshine days in January: 16.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in January
Derby, CT
- 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
Derby, CT
- Average cloud cover in January: 44
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in January
Derby, CT
- 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).
Derby, Connecticut, USA
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