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's climate shows a minor adjustment in average high-temperatures to a still icy 32.5°F (0.3°C) from December's 32.4°F (0.2°C). Allen reports an average nighttime low-temperature of 18.1°F (-7.7°C) in January.Humidity
January is the most humid month, with an average relative humidity of 80%.Rainfall
January is the month with the least rainfall in Allen. Rain falls for 3.5 days and accumulates 0.55" (14mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Allen, during January, snow falls for 10.2 days and regularly aggregates up to 2.87" (73mm) of snow. Throughout the year, there are 47.4 snowfall days, and 22.72" (577mm) of snow is accumulated.Daylight
In January, the average length of the day in Allen is 9h and 25min.On the first day of January, sunrise is at 7:19 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 4:57 pm MST.
Sunshine
In Allen, the average sunshine in January is 5.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 in January translates into these instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January?
How much does it snow in January?
How many hours of daylight does Allen have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Allen have in January?
What is the month with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Allen, SD
- Average high temperature in January: 32.5°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in January: 18.1°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in January
Allen, SD
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in January
Allen, SD
- Average wind speed in January: 10.7mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).
Average humidity in January
Allen, SD
- Average humidity in January: 80%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall in January
Allen, SD
- Average rainfall in January: 0.55"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in January
Allen, SD
- Average rainfall days in January: 3.5 days
The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are February and December (2.5 days).
Average snowfall in January
Allen, SD
- Average snowfall in January: 2.87"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Allen, SD
- Average snowfall days in January: 10.2 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 and August (0 days).
Average daylight in January /
Average sunshine in January
Allen, 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 0min).
- Average sunshine in January: 5h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in January
Allen, SD
- Average sunshine days in January: 18.6 days
The month with the most sunshine days is September (22.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in January
Allen, SD
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Allen, SD
- Average cloud cover in January: 42
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in January
Allen, 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).
Allen, South Dakota, USA
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