April weather forecastArnold, MO
April
Weather in April
April is a refreshing spring month in Arnold, Missouri, with an average temperature fluctuating between 65.7°F (18.7°C) and 48°F (8.9°C).Temperature
Entering April, Arnold sees a temperature rise, with the average high-temperature advancing from March's fresh 54.5°F (12.5°C) to an enjoyable 65.7°F (18.7°C). During the nights in April, the temperature averages to a frosty 48°F (8.9°C).Humidity
The average relative humidity in April is 75%.Rainfall
In April, the rain falls for 14.7 days. Throughout April, 3.43" (87mm) of precipitation is accumulated. In Arnold, during the entire year, the rain falls for 146.1 days and collects up to 32.36" (822mm) of precipitation.Snowfall
In Arnold, snow does not fall in April through October.Daylight
In April, the average length of the day is 13h and 14min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:25 pm. On the last day of April, sunrise is at 6:04 am and sunset at 7:52 pm CDT.
Sunshine
The average sunshine in April is 8.4h.UV index
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 radiation for the ordinary person.Note: The UV index of 5 in April translates into these instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Arnold, MO
- Average high temperature in April: 65.7°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in April: 48°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in April
Arnold, MO
- Average pressure in April: 29.94"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
Arnold, MO
- Average wind speed in April: 8.8mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in April
Arnold, MO
- Average humidity in April: 75%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Arnold, MO
- Average rainfall in April: 3.43"
The wettest month (with the highest rainfall) is May (3.94").
The driest months (with the least rainfall) are February and November (1.77").
Average rainfall days in April
Arnold, MO
- Average rainfall days in April: 14.7 days
The month with the highest number of rainy days is July (16.9 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall in April
Arnold, MO
- Average snowfall in April: 0"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Arnold, MO
- Average snowfall days in April: 0.1 days
The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Arnold, MO
- Average daylight in April: 13h and 12min
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 24min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in April
Arnold, MO
- Average sunshine days in April: 14 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in April
Arnold, 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 and December (UV index 2).
Average cloud cover in April
Arnold, MO
- Average cloud cover in April: 41
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 April
Arnold, 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).
