April weather forecastWilliamstown, MO
April
Weather in April
April is an enjoyable spring month in Williamstown, Missouri, with an average temperature ranging between min 44.2°F (6.8°C) and max 61.9°F (16.6°C).Temperature
April's arrival coincides with a temperature rise, moving from March's chilly 49.6°F (9.8°C) to a comfortable 61.9°F (16.6°C). Nighttime temperature in Williamstown, Missouri, lowers to an average of 44.2°F (6.8°C) in April.Humidity
In Williamstown, the average relative humidity in April is 75%.Rainfall
In Williamstown, in April, it is raining for 14.8 days, with typically 3.15" (80mm) of accumulated precipitation. In Williamstown, during the entire year, the rain falls for 134.4 days and collects up to 27.44" (697mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 0.5 snowfall days, in April, Williamstown aggregates 0.67" (17mm) of snow. In Williamstown, during the entire year, snow falls for 24.7 days and aggregates up to 11.69" (297mm) of snow.Daylight
In April, the average length of the day is 13h and 19min.On the first day of April, sunrise is at 6:49 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 8:01 pm CDT.
Sunshine
The average sunshine in April is 8.2h.UV index
In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The average daily UV index of 4 in April transforms into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Williamstown, MO
- Average high temperature in April: 61.9°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in April: 44.2°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in April
Williamstown, MO
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Williamstown, MO
- Average wind speed in April: 10.3mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in April
Williamstown, MO
- Average humidity in April: 75%
The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Williamstown, MO
- Average rainfall in April: 3.15"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days in April
Williamstown, MO
- Average rainfall days in April: 14.8 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (4.7 days).
Average snowfall in April
Williamstown, MO
- Average snowfall in April: 0.67"
The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Williamstown, MO
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is January (7.4 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
Williamstown, MO
- Average daylight in April: 13h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in April: 8h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in April
Williamstown, MO
- Average sunshine days in April: 13.8 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in April
Williamstown, MO
- Average UV index in April: 4
The months with the highest UV index are 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
Williamstown, MO
- Average cloud cover in April: 43
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in April
Williamstown, 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).
