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
In Plana, South Dakota, the month of January registers the lowest temperatures, averaging 20.7°F (-6.3°C) at the peak and 6.3°F (-14.3°C) at the lowest.Humidity
January is the most humid month, with an average relative humidity of 88%.Rainfall
January is the month with the least rainfall. Rain falls for 3 days and accumulates 0.59" (15mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. January is the month with the most snowfall. Snow falls for 13 days and accumulates 3.82" (97mm) of snow.Daylight
In January, the average length of the day is 9h and 11min.On the first day of January, sunrise is at 8:13 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 5:37 pm CST.
Sunshine
With an average of 3.9h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index are January, February and November, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 1 during January leads to these instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
How cold is it in January?
What is the most humid month in Plana?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
What is the snowiest month?
How much does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Plana have in January?
When is the lowest UV index?
How high is the UV index in January?
Average temperature in January
Plana, SD
- Average high temperature in January: 20.7°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in January: 6.3°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in January
Plana, SD
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in January
Plana, SD
- Average wind speed in January: 9.5mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in January
Plana, SD
- Average humidity in January: 88%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are August and September (60%).
Average rainfall in January
Plana, SD
- Average rainfall in January: 0.59"
The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in January
Plana, SD
- Average rainfall days in January: 3 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is February (2 days).
Average snowfall in January
Plana, SD
- Average snowfall in January: 3.82"
The month with the highest snowfall is January (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Plana, SD
- Average snowfall days in January: 13 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Plana, SD
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in January
Plana, SD
- Average sunshine days in January: 17.2 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (12.7 days).
Average UV index in January
Plana, SD
- Average UV index in January: 1
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 and November (UV index 1).
Average cloud cover in January
Plana, SD
- Average cloud cover in January: 57
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 23).
Average visibility in January
Plana, SD
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Plana, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location