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April Weather in Collinsville, United States

Last updated: June 24, 2025

In April, the average temperature in Collinsville, United States hovers around 9°C (48°F). Expect a chilly minimum of -5°C (23°F) and a pleasant maximum of 28°C (84°F). The region experiences an average precipitation of 136 mm (5.3 in) spread over 13 days, contributing to a humidity level of 78%. Prepare for a mix of cool breezes and occasional showers!

April Temperature in Collinsville

In April in Collinsville, the average temperature is 9°C (48°F). Maximum temperatures can reach 28°C (84°F), while the minimum can drop as low as -5°C (23°F). Be prepared for a wide range of temperatures when traveling to Collinsville during this time.

April Weather in Collinsville: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Collinsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Collinsville, April typically has an average temperature of 9°C (48°F), with highs reaching up to 28°C (84°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec293237485968747266554133
Data source: Temperature data for Collinsville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Collinsville

In Collinsville in April, the total precipitation amount is 136 mm (5.3 in), spread over 13 days.

April Precipitation Trends in Collinsville

The chart displays monthly precipitation patterns in Collinsville, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Collinsville, April typically receives around 136 mm (5.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec73939113612010316210712215295123
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Collinsville

In Collinsville in April humidity is 78%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that clings to your skin, making outdoor excursions less enjoyable as you navigate the damp air.

April Average Humidity in Collinsville

This chart illustrates the average monthly humidity levels in Collinsville, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Collinsville is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Collinsville

In Collinsville in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Collinsville.

Maximum UV Index Levels in Collinsville for April

The chart shows the monthly maximum UV Index (UVI) for Collinsville in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Collinsville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Collinsville April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How April Weather in Collinsville Compares to Other Months

Weather in Collinsville varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Collinsville, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Collinsville, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)73 mm (2.9 inches)84%moderate
February Weather0°C (32°F)93 mm (3.7 inches)82%moderate
March Weather3°C (38°F)91 mm (3.6 inches)81%high
April Weather9°C (48°F)136 mm (5.3 inches)78%very high
May Weather15°C (59°F)120 mm (4.7 inches)69%very high
June Weather20°C (69°F)103 mm (4.1 inches)69%very high
July Weather23°C (74°F)162 mm (6.4 inches)62%very high
August Weather22°C (73°F)107 mm (4.2 inches)65%very high
September Weather19°C (66°F)122 mm (4.8 inches)68%very high
October Weather13°C (56°F)152 mm (6.0 inches)74%high
November Weather5°C (42°F)95 mm (3.7 inches)82%moderate
December Weather1°C (33°F)123 mm (4.9 inches)80%low

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