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°F (3.9°C) and an average low-temperature of 24.3°F (-4.3°C), is considered the coldest month.Humidity
In Saint Clair, the average relative humidity in January is 75%.Rainfall
The months with the least rainfall are January and February Rain falls for 5.9 days and accumulates 0.98" (25mm) of rain.Snowfall
Months with snowfall are January through March, November and December. In Saint Clair, in January, during 6.2 snowfall days, 0.94" (24mm) of snow is typically accumulated. Throughout the year, there are 19.3 snowfall days, and 4.17" (106mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 52min.On the first day of the month, sunrise is at 7:20 am and sunset at 4:53 pm. On the last day of January, sunrise is at 7:09 am and sunset at 5:24 pm CST.
Sunshine
The months with the least sunshine are January and February, with an average of 4.7h 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 of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 2 in January interprets into the following advice:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
Is January cold?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January?
How many days does it snow in January?
How many hours of daylight does Saint Clair have in January?
When are sunrise and sunset in January?
What are the months with the least sunshine?
How long on average sun shines in January in Saint Clair?
What is the month with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Saint Clair, MO
- Average high temperature in January: 39°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in January: 24.3°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in January
Saint Clair, 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 (29.92"Hg).
Average wind speed in January
Saint Clair, MO
- Average wind speed in January: 8.5mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in January
Saint Clair, MO
- Average humidity in January: 75%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Saint Clair, MO
- Average rainfall in January: 0.98"
The wettest months (with the highest rainfall) are April and May (2.48").
The driest months (with the least rainfall) are January and February (0.98").
Average rainfall days in January
Saint Clair, MO
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in January
Saint Clair, MO
- Average snowfall in January: 0.94"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Saint Clair, MO
- Average snowfall days in January: 6.2 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Saint Clair, 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 30min).
- Average sunshine in January: 4h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 42min).
Average sunshine days in January
Saint Clair, MO
- Average sunshine days in January: 20.6 days
The month with the most sunshine days is January (20.6 days).
The month with the least sunshine days is May (13.7 days).
Average UV index in January
Saint Clair, MO
- Average UV index in January: 2
The months with the highest UV index are May, 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
Saint Clair, MO
- Average cloud cover in January: 49
The months with the most cloud cover are January and February (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in January
Saint Clair, MO
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
Saint Clair, Missouri, USA
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