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 is the month that records the lowest temperatures, with averages ranging from a high of 49.6°F (9.8°C) to a low of 33.6°F (0.9°C).Humidity
In January, the average relative humidity is 76%.Rainfall
In January, the rain falls for 10.5 days. Throughout January, 2.52" (64mm) of precipitation is accumulated. Throughout the year, in Rolla, there are 166 rainfall days, and 39.21" (996mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Rolla, during January, snow falls for 1.5 days and regularly aggregates up to 0.79" (20mm) of snow. In Rolla, during the entire year, snow falls for 4.6 days and aggregates up to 1.89" (48mm) of snow.Daylight
In January, the average length of the day is 10h and 11min.On the first day of January in Rolla, sunrise is at 7:16 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:39 pm CST.
Sunshine
The months with the least sunshine are January and February, with an average of 5.2h of sunshine.UV index
The average daily maximum UV index in January is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 3 in January translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Rolla?
What is the temperature in January in Rolla?
What is the average humidity in January in Rolla?
How much does it rain in Rolla in January?
How much does it snow in Rolla in January?
How many hours of daylight does Rolla have in January?
What time are sunrise and sunset in January in Rolla?
What is the month with the least sunshine in Rolla?
How many hours of sunshine does Rolla have in January?
What is the UV index reading in January in Rolla?
Average temperature in January
Rolla, AR
- Average high temperature in January: 49.6°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in January: 33.6°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).
Average pressure in January
Rolla, AR
- Average pressure in January: 30.17"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Rolla, AR
- Average wind speed in January: 6.8mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in January
Rolla, AR
- Average humidity in January: 76%
The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are July, September and October (72%).
Average rainfall in January
Rolla, AR
- Average rainfall in January: 2.52"
The wettest month (with the highest rainfall) is April (4.53").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in January
Rolla, AR
- Average rainfall days in January: 10.5 days
The month with the highest number of rainy days is August (18.3 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in January
Rolla, AR
- Average snowfall in January: 0.79"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Rolla, AR
- Average snowfall days in January: 1.5 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Rolla, AR
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January: 5h and 1min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in January
Rolla, AR
- Average sunshine days in January: 18.6 days
The month with the most sunshine days is January (18.6 days).
The month with the least sunshine days is August (10 days).
Average UV index in January
Rolla, AR
- Average UV index in January: 3
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in January
Rolla, AR
- Average cloud cover in January: 41
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are June and September (Cloud cover 28).
Average visibility in January
Rolla, AR
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are May and December (5mi).
Rolla, Arkansas, USA
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