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 coldest month of the year, registering average temperatures as high as 36.9°F (2.7°C) and as low as 23.2°F (-4.9°C).Humidity
The average relative humidity in January is 75%.Rainfall
January is the month with the least rainfall. Rain falls for 5.6 days and accumulates 1.18" (30mm) of precipitation.Snowfall
Months with snowfall are January through March, May, October through December. In Arrow Rock, during January, snow falls for 5.3 days and regularly aggregates up to 2.91" (74mm) of snow. In Arrow Rock, Missouri, during the entire year, snow falls for 17.6 days and aggregates up to 9.06" (230mm) of snow.Daylight
The average length of the day in January is 9h and 48min.On the first day of January, sunrise is at 7:30 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:31 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 4.8h of sunshine.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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 2 in January transforms into the following instructions:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To cut down UV radiation exposure by about half, sport a wide-brim hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
How cold is it in January?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
How many days does it snow in January?
How many hours of daylight does Arrow Rock have in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Arrow Rock, MO
- Average high temperature in January: 36.9°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in January: 23.2°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in January
Arrow Rock, MO
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Arrow Rock, MO
- Average wind speed in January: 9.6mph
The windiest month (with the highest average wind speed) is March (9.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in January
Arrow Rock, MO
- Average humidity in January: 75%
The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Arrow Rock, MO
- Average rainfall in January: 1.18"
The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in January
Arrow Rock, MO
- Average rainfall days in January: 5.6 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in January
Arrow Rock, MO
- Average snowfall in January: 2.91"
The month with the highest snowfall is February (2.95").
The months with the least snowfall are April, June, July, August and September (0").
Average snowfall days in January
Arrow Rock, MO
- Average snowfall days in January: 5.3 days
The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Arrow Rock, MO
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in January
Arrow Rock, MO
- Average sunshine days in January: 20 days
The months with the most sunshine days are January and December (20 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in January
Arrow Rock, MO
- Average UV index in January: 2
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, November and December (UV index 2).
Average cloud cover in January
Arrow Rock, MO
- Average cloud cover in January: 48
The months with the most cloud cover are January, February and March (Cloud cover 48).
The months with the least cloud cover are June, July and August (Cloud cover 28).
Average visibility in January
Arrow Rock, MO
- 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).
Arrow Rock, Missouri, USA
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