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, recording an average high temperature of 30.6°F (-0.8°C) and a low temperature of 18°F (-7.8°C), is Derry's coldest month.Humidity
The average relative humidity in January in Derry is 80%.Rainfall
January is the month with the least rainfall. Rain falls for 4.1 days and accumulates 0.75" (19mm) of precipitation.Snowfall
Months with snowfall in Derry are January through May, October through December. In Derry, New Hampshire, during January, snow falls for 7.1 days and regularly aggregates up to 2.4" (61mm) of snow. Throughout the year, in Derry, there are 26.1 snowfall days, and 11.54" (293mm) of snow is accumulated.Daylight
In Derry, the average length of the day in January is 9h and 27min.On the first day of the month, sunrise is at 7:16 am and sunset at 4:21 pm. On the last day of January, in Derry, sunrise is at 7:01 am and sunset at 4:56 pm EST.
Sunshine
The average sunshine in January in Derry is 5.1h.UV index
The months with the lowest UV index in Derry, New Hampshire, are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 2 in January leads to these guidelines:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
What time of the year is the coldest in Derry?
How cold is January in Derry?
What is the average humidity in January in Derry?
What is the driest month in Derry?
How many days does it rain in January in Derry?
How much does it snow in Derry in January?
What is the average length of the day in January in Derry?
When is the sunrise / sunset in January in Derry?
How long on average sun shines in January in Derry?
What is the month with the lowest UV index in Derry?
What is the UV index intensity in January in Derry?
Average temperature in January
Derry, NH
- Average high temperature in January: 30.6°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 (30.6°F).
- Average low temperature in January: 18°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in January
Derry, 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 (29.92"Hg).
Average wind speed in January
Derry, NH
- Average wind speed in January: 8.3mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in January
Derry, NH
- Average humidity in January: 80%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in January
Derry, NH
- Average rainfall in January: 0.75"
The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in January
Derry, NH
- Average rainfall days in January: 4.1 days
The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in January
Derry, NH
- Average snowfall in January: 2.4"
The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Derry, NH
- Average snowfall days in January: 7.1 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Derry, NH
- Average daylight in January: 9h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in January
Derry, NH
- Average sunshine days in January: 21.3 days
The months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is June (16.7 days).
Average UV index in January
Derry, NH
- 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
Derry, NH
- Average cloud cover in January: 45
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in January
Derry, NH
- Average visibility in January: 6mi
The months with the highest visibility are January, April, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August, September and October (5mi).
Derry, New Hampshire, USA
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