Contents
- Weather in January
- Frequently asked questions
- Average temperature 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 UV index in January
Weather in January
Temperature
St. Louis's temperature records reveal January as the coldest month, marked by average highs of 39.9°F and lows of 23.7°F.Humidity
In January, the average relative humidity in St. Louis, Missouri, is 73%.Rainfall
In St. Louis, in January, during 8.9 rainfall days, 2.4" of precipitation is typically accumulated. In St. Louis, during the entire year, the rain falls for 112.6 days and collects up to 40.94" of precipitation.Snowfall
Months with snowfall in St. Louis are January through April, November and December. January is the month with the most snowfall in St. Louis. Snow falls for 4.7 days and accumulates 5.59" of snow.Daylight
The average length of the day in January in St. Louis is 9h and 50min.On the first day of the month, sunrise is at 7:18 am and sunset at 4:50 pm. On the last day of January, in St. Louis, sunrise is at 7:07 am and sunset at 5:21 pm CST.
Sunshine
In St. Louis, the average sunshine in January is 5.2h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in St. Louis. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In January, a daily UV index of 2 turns into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Enhance your sun protection with tightly woven, yet airy clothing. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
What part of the year is the coldest in St. Louis?
Is January cold in St. Louis?
What is the average humidity in January in St. Louis?
How much does it rain in St. Louis in January?
What is the snowiest month in St. Louis?
How many days does it snow in January in St. Louis?
How many hours of daylight does St. Louis have in January?
When is the sunrise / sunset in January in St. Louis?
How long on average sun shines in January in St. Louis?
When is the lowest UV index in St. Louis?
What is the UV index intensity in January in St. Louis?
Average temperature in January
St. Louis, MO
- Average high temperature in January: 39.9°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in January: 23.7°F
The month with the highest average low temperature is July (71°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average humidity in January
St. Louis, MO
- Average humidity in January: 73%
The month with the highest relative humidity is December (75.8%).
The month with the lowest relative humidity is April (63.5%).
Average rainfall in January
St. Louis, MO
- Average rainfall in January: 2.4"
The wettest month (with the highest rainfall) is May (4.7").
The driest month (with the least rainfall) is February (2.2").
Average rainfall days in January
St. Louis, MO
- Average rainfall days in January: 8.9 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is September (7.4 days).
Average snowfall in January
St. Louis, MO
- Average snowfall in January: 5.6"
The month with the highest snowfall is January (5.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
St. Louis, MO
- Average snowfall days in January: 4.7 days
The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
St. Louis, 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: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average UV index in January
St. Louis, MO
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 9).
The months with the lowest UV index are January and December (UV index 2).
St. Louis, Missouri, USA
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