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 brings the lowest temperatures, with an average high of 27.3°F (-2.6°C) and an average low of 13.6°F (-10.2°C).Humidity
With an average relative humidity of 84%, January is the most humid month in Fairfax.Rainfall
In Fairfax, in January, it is raining for 2.9 days, with typically 0.39" (10mm) of accumulated precipitation. In Fairfax, during the entire year, the rain falls for 104.1 days and collects up to 14.29" (363mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Fairfax. The months with the most snowfall in Fairfax are January and March, with an average 1.93" (49mm) of accumulated snow.Daylight
In Fairfax, the average length of the day in January is 9h and 26min.On the first day of the month, sunrise is at 8:06 am and sunset at 5:11 pm. On the last day of January, in Fairfax, sunrise is at 7:51 am and sunset at 5:46 pm CST.
Sunshine
With an average of 4.7h of sunshine, January has the least sunshine of the year in Fairfax.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Fairfax. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 2 in January suggests the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Fairfax?
How cold is January in Fairfax?
What is the most humid month in Fairfax?
What is the average humidity in January in Fairfax?
How many days does it rain in January in Fairfax?
When does it snow the most in Fairfax?
How many days does it snow in January in Fairfax?
What is the average length of the day in January in Fairfax?
What time are sunrise and sunset in January in Fairfax?
What is the month with the least sunshine in Fairfax?
How long on average sun shines in January in Fairfax?
When is the lowest UV index in Fairfax?
What is the UV index intensity in January in Fairfax?
Average temperature in January
Fairfax, SD
- Average high temperature in January: 27.3°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in January: 13.6°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in January
Fairfax, SD
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in January
Fairfax, SD
- Average wind speed in January: 10.4mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in January
Fairfax, SD
- Average humidity in January: 84%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (62%).
Average rainfall in January
Fairfax, SD
- Average rainfall in January: 0.39"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is February (0.31").
Average rainfall days in January
Fairfax, SD
- Average rainfall days in January: 2.9 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in January
Fairfax, SD
- Average snowfall in January: 1.93"
The months with the highest snowfall are January and March (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Fairfax, SD
- Average snowfall days in January: 8.2 days
The month with the highest number of snowfall days is January (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
Fairfax, SD
- Average daylight in January: 9h and 2min
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: 4h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in January
Fairfax, SD
- Average sunshine days in January: 20.9 days
The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in January
Fairfax, SD
- 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, November and December (UV index 2).
Average cloud cover in January
Fairfax, SD
- Average cloud cover in January: 49
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in January
Fairfax, SD
- 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).
Fairfax, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location