Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
The shift into April is characterized by a rise in the average high-temperature, transitioning from March's fresh 54.1°F (12.3°C) to a refreshing 65.3°F (18.5°C). O'Fallon experiences an average low-temperature reading of 47.3°F (8.5°C) throughout April.Humidity
The average relative humidity in April is 75%.Rainfall
In O'Fallon, in April, it is raining for 13.3 days, with typically 2.48" (63mm) of accumulated precipitation. In O'Fallon, during the entire year, the rain falls for 132.3 days and collects up to 21.06" (535mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In O'Fallon, the average length of the day in April is 13h and 14min.On the first day of April, sunrise is at 6:46 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 7:54 pm CDT.
Sunshine
In O'Fallon, Missouri, the average sunshine in April is 8.7h.UV index
In O'Fallon, the average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The average daily UV index of 5 in April transforms into the following instructions:
Ensure safety - Recommendations to avert sunburn are presented. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What is the temperature in April in O'Fallon?
What is the average humidity in April in O'Fallon?
How many days does it rain in April in O'Fallon?
When it does not snow in O'Fallon?
Does it snow in O'Fallon in April?
What is the average length of the day in April in O'Fallon?
When are sunrise and sunset in April in O'Fallon?
How many hours of sunshine does O'Fallon have in April?
What is the UV index intensity in April in O'Fallon?
Average temperature in April
O'Fallon, MO
- Average high temperature in April: 65.3°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in April: 47.3°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average pressure in April
O'Fallon, MO
- Average pressure in April: 29.93"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 April
O'Fallon, MO
- Average wind speed in April: 8.9mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in April
O'Fallon, MO
- Average humidity in April: 75%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in April
O'Fallon, MO
- Average rainfall in April: 2.48"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is December (0.91").
Average rainfall days in April
O'Fallon, MO
- Average rainfall days in April: 13.3 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in April
O'Fallon, MO
- Average snowfall in April: 0"
The month with the highest snowfall is February (1.61").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
O'Fallon, MO
- Average snowfall days in April: 0.3 days
The months with the highest number of snowfall days are January and February (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
O'Fallon, MO
- Average daylight in April: 13h and 1min
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 April: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 42min).
Average sunshine days in April
O'Fallon, MO
- Average sunshine days in April: 14.9 days
The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is July (12.6 days).
Average UV index in April
O'Fallon, MO
- Average UV index in April: 5
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 April
O'Fallon, MO
- Average cloud cover in April: 41
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June, July, August and September (Cloud cover 28).
Average visibility in April
O'Fallon, MO
- Average visibility in April: 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).
O'Fallon, Missouri, USA
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