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
With an average high-temperature of 18.9°F (-7.3°C) and an average low-temperature of 5°F (-15°C), January is the coldest month.Humidity
January is the most humid month in Roslyn, with an average relative humidity of 91%.Rainfall
In January, the rain falls for 2.5 days. Throughout January, 0.71" (18mm) of precipitation is accumulated. In Roslyn, during the entire year, the rain falls for 112.9 days and collects up to 22.09" (561mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Roslyn. In Roslyn, during January, snow falls for 15.1 days and regularly aggregates up to 4.45" (113mm) of snow. In Roslyn, during the entire year, snow falls for 68.4 days and aggregates up to 23.74" (603mm) of snow.Daylight
In January, the average length of the day in Roslyn is 9h and 11min.On the first day of January, sunrise is at 8:09 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 5:34 pm CST.
Sunshine
With an average of 3.2h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 1 during January translates into these guidelines:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
What is the coldest time of year in Roslyn?
How cold is January in Roslyn?
What is the most humid month in Roslyn?
What is the average humidity in January in Roslyn?
How many days does it rain in January in Roslyn?
How much does it snow in Roslyn in January?
What is the average length of the day in January in Roslyn?
What time are sunrise and sunset in January in Roslyn?
What is the month with the least sunshine in Roslyn?
How long on average sun shines in January in Roslyn?
When is the lowest UV index in Roslyn?
What is the UV index reading in January in Roslyn?
Average temperature in January
Roslyn, SD
- Average high temperature in January: 18.9°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in January: 5°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (5°F).
Average pressure in January
Roslyn, 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
Roslyn, SD
- Average wind speed in January: 11mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.7mph).
Average humidity in January
Roslyn, SD
- Average humidity in January: 91%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is September (66%).
Average rainfall in January
Roslyn, SD
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in January
Roslyn, SD
- Average rainfall days in January: 2.5 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in January
Roslyn, SD
- Average snowfall in January: 4.45"
The month with the highest snowfall is December (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Roslyn, SD
- Average snowfall days in January: 15.1 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Roslyn, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in January
Roslyn, SD
- Average sunshine days in January: 14.3 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in January
Roslyn, SD
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in January
Roslyn, SD
- Average cloud cover in January: 66
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in January
Roslyn, SD
- Average visibility in January: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Roslyn, South Dakota, USA
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