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
During the coldest month, January, temperatures average a high of 29.8°F (-1.2°C) and a low of 16.7°F (-8.5°C).Humidity
January is the most humid month in Interior, with an average relative humidity of 81%.Rainfall
The month with the least rainfall in Interior, South Dakota, is January, when the rain falls for 2.8 days and typically collects 0.39" (10mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Interior, during January, snow falls for 8.4 days and regularly aggregates up to 2.09" (53mm) of snow. In Interior, during the entire year, snow falls for 38.8 days and aggregates up to 16.1" (409mm) of snow.Daylight
The average length of the day in January in Interior is 9h and 22min.On the first day of the month, sunrise is at 7:21 am and sunset at 4:21 pm. On the last day of January, sunrise is at 7:05 am and sunset at 4:56 pm MST.
Sunshine
January and February, with an average of 5.2h of sunshine, are months with the least sunshine.UV index
In Interior, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: In January, an average UV index of 2 transforms into the following instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Boost your sun resistance with garments that are densely woven yet spacious. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Interior?
How cold is it in Interior in January?
What is the most humid month in Interior?
What is the average humidity in January in Interior?
What is the driest month in Interior?
How much does it rain in Interior in January?
How many days does it snow in January in Interior?
What is the average length of the day in January in Interior?
When are sunrise and sunset in January in Interior?
What is the month with the least sunshine in Interior?
How many hours of sunshine does Interior have in January?
How high is the UV index in January in Interior?
Average temperature in January
Interior, SD
- Average high temperature in January: 29.8°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in January: 16.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in January
Interior, SD
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in January
Interior, SD
- Average wind speed in January: 10.4mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is February (10.1mph).
Average humidity in January
Interior, SD
- Average humidity in January: 81%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is September (47%).
Average rainfall in January
Interior, SD
- Average rainfall in January: 0.39"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in January
Interior, SD
- Average rainfall days in January: 2.8 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in January
Interior, SD
- Average snowfall in January: 2.09"
The month with the highest snowfall is February (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Interior, SD
- Average snowfall days in January: 8.4 days
The month with the highest number of snowfall days is February (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Interior, SD
- Average daylight in January: 9h and 2min
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: 5h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in January
Interior, SD
- Average sunshine days in January: 20.6 days
The month with the most sunshine days is December (21.1 days).
The months with the least sunshine days are April and June (14.1 days).
Average UV index in January
Interior, SD
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Interior, SD
- Average cloud cover in January: 46
The month with the most cloud cover is January (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in January
Interior, 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).
Interior, South Dakota, USA
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