January weather forecastDerry, NH
January
Weather in January
January in Derry, New Hampshire typically welcomes the new year with cold temperatures and a significant chance of snowfall. On average, the temperatures range from 18°F (-7.8°C) to around 30.6°F (-0.8°C), with 2.4" (61mm) of snow accumulating over approximately seven days. Winter storms can lead to intermittent cycles of freezing and melting, affecting road conditions and outdoor activities. The higher chance of overcast skies also means fewer hours of daylight and sunshine. Nevertheless, the wintry landscape offers abundant opportunities for snow-transformed beauty and winter recreational activities.Temperature
January brings the lowest temperatures, with an average high of 30.6°F (-0.8°C) and an average low of 18°F (-7.8°C).Humidity
In January, the average relative humidity is 80%.Rainfall
The month with the least rainfall is January, when the rain falls for 4.1 days and typically collects 0.75" (19mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Derry, in January, snow falls for 7.1 days, with typically accumulated 2.4" (61mm) of snow. In Derry, during the entire year, snow falls for 26.1 days and aggregates up to 11.54" (293mm) of snow.Daylight
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, sunrise is at 7:01 am and sunset at 4:56 pm EST.
Sunshine
In Derry, 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 average individuals.Note: A daily high UV index of 2 in January leads to these guidelines:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 30min
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 6min
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).
