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
As Ottawa transitions into April, the average high-temperature shows a change, moving from a frosty 46.9°F (8.3°C) in March to a moderate 58.8°F (14.9°C). The month of April records an average low-temperature of 42.4°F (5.8°C).Humidity
In April, the average relative humidity in Ottawa is 74%.Rainfall
In Ottawa, Illinois, in April, during 17.6 rainfall days, 4.25" (108mm) of precipitation is typically accumulated. In Ottawa, during the entire year, the rain falls for 166.3 days and collects up to 35.35" (898mm) of precipitation.Snowfall
Months with snowfall in Ottawa, Illinois, are January through April, October through December. April is the last month it regularly snows in Ottawa. During 1.7 snowfall days, in April, Ottawa aggregates 1.93" (49mm) of snow. Throughout the year, in Ottawa, there are 43.4 snowfall days, and 17.76" (451mm) of snow is accumulated.Daylight
The average length of the day in April in Ottawa is 13h and 21min.On the first day of April, sunrise is at 6:37 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 7:52 pm CDT.
Sunshine
The average sunshine in April in Ottawa is 7.8h.UV index
In Ottawa, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In April, a daily maximum UV index of 3 leads to the following instructions:
Heed the precautions - Suggestions to avoid sunburn are made. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What is the average April temperature in Ottawa?
What is the average humidity in April in Ottawa?
How many days does it rain in April in Ottawa?
What is the last month it snows in Ottawa?
What is the average length of the day in April in Ottawa?
What time are sunrise and sunset in April in Ottawa?
How long on average sun shines in April in Ottawa?
What is the UV index reading in April in Ottawa?
Average temperature in April
Ottawa, IL
- Average high temperature in April: 58.8°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in April
Ottawa, IL
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Ottawa, IL
- Average wind speed in April: 10.2mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in April
Ottawa, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Ottawa, IL
- Average rainfall in April: 4.25"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days in April
Ottawa, IL
- Average rainfall days in April: 17.6 days
The month with the highest number of rainy days is July (19.9 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in April
Ottawa, IL
- Average snowfall in April: 1.93"
The month with the highest snowfall is February (5.08").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Ottawa, IL
- Average snowfall days in April: 1.7 days
The month with the highest number of snowfall days is January (12.9 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
Ottawa, 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 12min).
- Average sunshine in April: 7h and 5min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Ottawa, IL
- Average sunshine days in April: 9.8 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (7.2 days).
Average UV index in April
Ottawa, IL
- Average UV index in April: 3
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Ottawa, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in April
Ottawa, IL
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Ottawa, Illinois, USA
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