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 Petersburg transitions into April, a rise in the average high-temperature is observed, moving from a fresh 50.9°F (10.5°C) in March to a refreshing 63°F (17.2°C). Petersburg's temperature drops to an average low of 46°F (7.8°C) during the nights of April.Humidity
In April, the average relative humidity is 74%.Rainfall
In April, in Petersburg, Illinois, the rain falls for 15.5 days. Throughout April, 3.54" (90mm) of precipitation is accumulated. In Petersburg, during the entire year, the rain falls for 146.4 days and collects up to 30.67" (779mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows. During 0.8 snowfall days, in April, Petersburg aggregates 0.12" (3mm) of snow. In Petersburg, during the entire year, snow falls for 29.2 days and aggregates up to 10.39" (264mm) of snow.Daylight
The average length of the day in April is 13h and 18min.On the first day of April in Petersburg, sunrise is at 6:41 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 7:53 pm CDT.
Sunshine
The average sunshine in April in Petersburg is 8h.UV index
The average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: In April, the maximum UV index of 4 suggests this advice:
Exercise prevention - Protecting skin and eyes from harm is required. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature in Petersburg?
What is the average humidity in April in Petersburg?
How much does it rain in Petersburg in April?
What is the last month it snows in Petersburg?
How many hours of daylight does Petersburg have in April?
When are sunrise and sunset in April in Petersburg?
How long on average sun shines in April in Petersburg?
How high is the UV index in April in Petersburg?
Average temperature in April
Petersburg, IL
- Average high temperature in April: 63°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in April: 46°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in April
Petersburg, IL
- 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 (29.91"Hg).
Average wind speed in April
Petersburg, IL
- Average wind speed in April: 10.3mph
The windiest months (with the highest average wind speed) are January, February and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in April
Petersburg, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in April
Petersburg, IL
- Average rainfall in April: 3.54"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is December (1.5").
Average rainfall days in April
Petersburg, IL
- Average rainfall days in April: 15.5 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in April
Petersburg, IL
- Average snowfall in April: 0.12"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Petersburg, IL
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is January (10.3 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
Petersburg, IL
- Average daylight in April: 13h and 2min
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 0min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in April
Petersburg, IL
- Average sunshine days in April: 11.7 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in April
Petersburg, IL
- 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
Petersburg, IL
- Average cloud cover in April: 45
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in April
Petersburg, 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).
Petersburg, Illinois, USA
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