April weather forecastDecatur, IN
April
Weather in April
April in Decatur, Indiana, is a mild spring month, with an average temperature ranging between max 59°F (15°C) and min 42.1°F (5.6°C).Temperature
In April, the average high-temperature increases from a chilly 46.9°F (8.3°C) in March to a refreshing 59°F (15°C). Decatur records an average low of 42.1°F (5.6°C) throughout the nights in April.Humidity
The average relative humidity in April is 76%.Rainfall
In Decatur, during April, the rain falls for 16.8 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Decatur, during the entire year, the rain falls for 159.4 days and collects up to 23.74" (603mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows in Decatur. During 1.8 snowfall days, in April, Decatur aggregates 0.35" (9mm) of snow. Throughout the year, there are 48.4 snowfall days, and 10.47" (266mm) of snow is accumulated.Daylight
In April, the average length of the day in Decatur is 13h and 20min.On the first day of April, sunrise is at 7:21 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 8:35 pm EDT.
Sunshine
The average sunshine in April is 6.9h.UV index
The average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 4 in April interprets into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Decatur, IN
- Average high temperature in April: 59°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in April: 42.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in April
Decatur, IN
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Decatur, IN
- Average wind speed in April: 10mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in April
Decatur, IN
- Average humidity in April: 76%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in April
Decatur, IN
- Average rainfall in April: 2.68"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in April
Decatur, IN
- Average rainfall days in April: 16.8 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in April
Decatur, IN
- Average snowfall in April: 0.35"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Decatur, IN
- Average snowfall days in April: 1.8 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Decatur, IN
- Average daylight in April: 13h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 6h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in April
Decatur, IN
- Average sunshine days in April: 10.8 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is June (10 days).
Average UV index in April
Decatur, IN
- Average UV index in April: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Decatur, IN
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in April
Decatur, IN
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January and August (5mi).
