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, noted for its average high-temperature of 39.9°F (4.4°C) and an average low-temperature of 25.2°F (-3.8°C), is considered the coldest month.Humidity
In January, the average relative humidity is 72%.Rainfall
January is the month with the least rainfall. Rain falls for 5 days and accumulates 0.79" (20mm) of precipitation.Snowfall
Months with snowfall are January through March, May, October through December. In Rockville, in January, during 3.8 snowfall days, 0.94" (24mm) of snow is typically accumulated. Throughout the year, there are 12.2 snowfall days, and 4.29" (109mm) of snow is accumulated.Daylight
In Rockville, the average length of the day in January is 9h and 53min.On the first day of the month, sunrise is at 7:32 am and sunset at 5:07 pm. On the last day of January, sunrise is at 7:21 am and sunset at 5:37 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 5.3h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 in January interprets into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. To protect against the Sun's most potent rays, avoid direct exposure around midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
Is it cold during January?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
How much does it snow in January?
What is the average length of the day in January in Rockville?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Rockville, MO
- Average high temperature in January: 39.9°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in January: 25.2°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in January
Rockville, MO
- 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 (29.91"Hg).
Average wind speed in January
Rockville, MO
- Average wind speed in January: 9.9mph
The windiest month (with the highest average wind speed) is March (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in January
Rockville, MO
- Average humidity in January: 72%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Rockville, MO
- Average rainfall in January: 0.79"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in January
Rockville, MO
- Average rainfall days in January: 5 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (5 days).
Average snowfall in January
Rockville, MO
- Average snowfall in January: 0.94"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are April, June, July, August and September (0").
Average snowfall days in January
Rockville, MO
- Average snowfall days in January: 3.8 days
The month with the highest number of snowfall days is February (4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Rockville, MO
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in January
Rockville, MO
- Average sunshine days in January: 22.7 days
The month with the most sunshine days is January (22.7 days).
The month with the least sunshine days is May (12.2 days).
Average UV index in January
Rockville, MO
- Average UV index in January: 2
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Rockville, MO
- Average cloud cover in January: 41
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in January
Rockville, 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).
Rockville, Missouri, USA
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