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
April's arrival is marked by an increase in the average high-temperature, moving from a chilly 48°F (8.9°C) in March to a refreshing 59.9°F (15.5°C). The temperature dips to an average of 43.2°F (6.2°C) during April nights.Humidity
In Rio, the average relative humidity in April is 75%.Rainfall
In Rio, during April, the rain falls for 11.8 days and regularly aggregates up to 1.3" (33mm) of precipitation. In Rio, during the entire year, the rain falls for 109.9 days and collects up to 11.14" (283mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Rio. April is the last month it regularly snows in Rio. During 0.9 snowfall days, in April, Rio aggregates 0.75" (19mm) of snow. Throughout the year, there are 28 snowfall days, and 4.53" (115mm) of snow is accumulated.Daylight
In Rio, the average length of the day in April is 13h and 20min.On the first day of April in Rio, Illinois, sunrise is at 6:43 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 7:57 pm CDT.
Sunshine
The average sunshine in April in Rio is 7.9h.UV index
In April, the average daily maximum UV index in Rio is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 4 during April leads to these instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the usual temperature for Rio in April?
What is the average humidity in April in Rio?
How many days does it rain in April in Rio?
What is the last month it snows in Rio?
How many hours of daylight does Rio have in April?
When are sunrise and sunset in April in Rio?
How many hours of sunshine does Rio have in April?
What is the UV index intensity in April in Rio?
Average temperature in April
Rio, IL
- Average high temperature in April: 59.9°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 (29.5°F).
- Average low temperature in April: 43.2°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in April
Rio, IL
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Rio, IL
- Average wind speed in April: 10.8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in April
Rio, IL
- Average humidity in April: 75%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Rio, IL
- Average rainfall in April: 1.3"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").
Average rainfall days in April
Rio, IL
- Average rainfall days in April: 11.8 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in April
Rio, IL
- Average snowfall in April: 0.75"
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Rio, IL
- Average snowfall days in April: 0.9 days
The month with the highest number of snowfall days is January (8.8 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
Rio, IL
- Average daylight in April: 13h and 2min
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: 7h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in April
Rio, IL
- Average sunshine days in April: 16.3 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in April
Rio, IL
- 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
Rio, IL
- Average cloud cover in April: 47
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in April
Rio, IL
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Rio, Illinois, USA
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