April weather forecastHarmon, IL
April
Weather in April
April is a refreshing spring month in Harmon, Illinois, with an average temperature fluctuating between 41.4°F (5.2°C) and 57.9°F (14.4°C).Temperature
With the onset of April, the average high-temperature slightly shifts from March's frosty 45.9°F (7.7°C) to a mild 57.9°F (14.4°C). Harmon experiences a mean temperature of 41.4°F (5.2°C) during April nights.Humidity
In April, the average relative humidity is 74%.Rainfall
In Harmon, in April, it is raining for 14.8 days, with typically 1.89" (48mm) of accumulated precipitation. In Harmon, during the entire year, the rain falls for 130.2 days and collects up to 17.36" (441mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 1 snowfall days, in April, Harmon aggregates 0.31" (8mm) of snow. Throughout the year, there are 34.2 snowfall days, and 7.87" (200mm) of snow is accumulated.Daylight
The average length of the day in April in Harmon is 13h and 22min.On the first day of April in Harmon, sunrise is at 6:39 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 5:54 am and sunset at 7:55 pm CDT.
Sunshine
In April, the average sunshine in Harmon is 7.7h.UV index
In April, the average daily maximum UV index in Harmon is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In April, a daily maximum UV index of 3 leads to the following instructions:
Take precautions - Protection against skin and eye damage is obliged. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. 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 April
Harmon, IL
- Average high temperature in April: 57.9°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in April: 41.4°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in April
Harmon, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Harmon, IL
- Average wind speed in April: 10.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in April
Harmon, IL
- Average humidity in April: 74%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in April
Harmon, IL
- Average rainfall in April: 1.89"
The wettest month (with the highest rainfall) is May (2.83").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in April
Harmon, IL
- Average rainfall days in April: 14.8 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in April
Harmon, IL
- Average snowfall in April: 0.31"
The month with the highest snowfall is January (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Harmon, IL
- Average snowfall days in April: 1 days
The month with the highest number of snowfall days is January (10.2 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
Harmon, IL
- Average daylight in April: 13h and 24min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 7h and 42min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in April
Harmon, IL
- Average sunshine days in April: 13.1 days
The months with the most sunshine days are November and December (18.8 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in April
Harmon, IL
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Harmon, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in April
Harmon, IL
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
