March weather forecastO'Fallon, IL
March
Weather in March
The first month of the spring, March, is a cool month in O'Fallon, Illinois, with an average temperature fluctuating between 54.5°F (12.5°C) and 37.9°F (3.3°C).Temperature
A rise in the average high-temperature is observed during March, moving from a wintry 42.1°F (5.6°C) in February to a fresh 54.5°F (12.5°C). In March, the nighttime temperature lowers to an average of 37.9°F (3.3°C).Humidity
In March, the average relative humidity in O'Fallon is 77%.Rainfall
In O'Fallon, in March, it is raining for 9.7 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, in O'Fallon, Illinois, there are 108.8 rainfall days, and 10.24" (260mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. March is the last month it regularly snows. During 1.4 snowfall days, in March, O'Fallon aggregates 0.16" (4mm) of snow. Throughout the year, there are 13.3 snowfall days, and 1.14" (29mm) of snow is accumulated.Daylight
In O'Fallon, the average length of the day in March is 11h and 59min.On the first day of the month, sunrise is at 6:30 am and sunset at 5:53 pm CST. On the last day of March, sunrise is at 6:44 am and sunset at 7:22 pm CDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from CDT to CST.
Sunshine
In March, the average sunshine in O'Fallon is 6.4h.UV index
In March, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 4 in March leads to these guidelines:
Take necessary precautions - Defending against sun damage is advocated. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Opt for tightly woven and loose clothing to enhance protection from the Sun. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in March
O'Fallon, IL
- Average high temperature in March: 54.5°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in March: 37.9°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in March
O'Fallon, IL
- Average pressure in March: 30.07"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in March
O'Fallon, IL
- Average wind speed in March: 9.3mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity in March
O'Fallon, IL
- Average humidity in March: 77%
The months with the highest relative humidity are May, July and August (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in March
O'Fallon, IL
- Average rainfall in March: 0.71"
The wettest month (with the highest rainfall) is July (1.42").
The driest month (with the least rainfall) is December (0.31").
Average rainfall days in March
O'Fallon, IL
- Average rainfall days in March: 9.7 days
The month with the highest number of rainy days is July (13.1 days).
The month with the least rainy days is December (4.6 days).
Average snowfall in March
O'Fallon, IL
- Average snowfall in March: 0.16"
The month with the highest snowfall is January (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in March
O'Fallon, IL
- Average snowfall days in March: 1.4 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 March /
Average sunshine in March
O'Fallon, IL
- Average daylight in March: 12h and 0min
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 March: 6h and 24min
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 30min).
Average sunshine days in March
O'Fallon, IL
- Average sunshine days in March: 18.4 days
The month with the most sunshine days is December (23.6 days).
The months with the least sunshine days are May and July (15.5 days).
Average UV index in March
O'Fallon, IL
- Average UV index in March: 4
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 March
O'Fallon, IL
- Average cloud cover in March: 47
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in March
O'Fallon, IL
- Average visibility in March: 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).
