January weather forecastCastleton, VT
January
Weather in January
The weather in Castleton, Vermont begins the year with a notable chilliness, indicative of typical winter conditions. Visibility averages 5mi (8km) throughout the month, with the presence of 62% cloud cover. Snowfall of 2.99in typically decorates the cityscape, visibly impacting the weather conditions. Residents prepare for temperatures with a high of 25.2°F (-3.8°C) and a low of 13.5°F (-10.3°C) on average. The short, cold days of January show a potential for snowstorms, with slight winds of 7mph (11.3km/h) escalating the feel of the winter chill.Temperature
January tends to be the coldest month, with temperatures averaging a daily high of 25.2°F (-3.8°C) and a low of 13.5°F (-10.3°C).Humidity
The months with the highest humidity are January and February, with an average relative humidity of 86%.Rainfall
In Castleton, during January, the rain falls for 4.5 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 112.5 rainfall days, and 10.75" (273mm) of precipitation is accumulated.Snowfall
Months with snowfall in Castleton are January through May, October through December. In Castleton, during January, snow falls for 10.5 days and regularly aggregates up to 2.99" (76mm) of snow. Throughout the year, there are 44.2 snowfall days, and 11.42" (290mm) of snow is accumulated.Daylight
In Castleton, the average length of the day in January is 9h and 23min.On the first day of the month, sunrise is at 7:25 am and sunset at 4:26 pm. On the last day of January, in Castleton, sunrise is at 7:10 am and sunset at 5:01 pm EST.
Sunshine
The average sunshine in January is 3.6h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Castleton. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 1 during January translates into the following directions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Castleton, VT
- Average high temperature in January: 25.2°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in January: 13.5°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in January
Castleton, VT
- Average pressure in January: 30.03"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Castleton, VT
- Average wind speed in January: 7mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in January
Castleton, VT
- Average humidity in January: 86%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in January
Castleton, VT
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is June (1.22").
The driest months (with the least rainfall) are March and September (0.67").
Average rainfall days in January
Castleton, VT
- Average rainfall days in January: 4.5 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in January
Castleton, VT
- Average snowfall in January: 2.99"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Castleton, VT
- Average snowfall days in January: 10.5 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Castleton, VT
- Average daylight in January: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January: 3h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in January
Castleton, VT
- Average sunshine days in January: 19.8 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is February (15.6 days).
Average UV index in January
Castleton, VT
- Average UV index in January: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Castleton, VT
- Average cloud cover in January: 62
The month with the most cloud cover is February (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in January
Castleton, VT
- Average visibility in January: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
