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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 18°C (65°F), offering a pleasant climate. Expect minimum temperatures to dip to 2°C (35°F), while maximums can reach a warm 32°C (89°F). Rainfall is moderate, with 133 mm (5.3 in) spread over 9 days, and the air tends to be quite humid, averaging 82%.

April Temperature in Collinsville

In April in Collinsville, the average temperature is 18°C (65°F). The maximum can reach 32°C (89°F), and the minimum can be as low as 2°C (35°F). This diverse temperature range makes Collinsville an ideal destination for travelers seeking both warm and cool experiences.

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 18°C (65°F), with highs reaching up to 32°C (89°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec485460647379818178695551
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 precipitation amount is 133 mm (5.3 in) spread over 9 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 133 mm (5.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1041481171341141671171289810768123
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 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478111111111110864
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 Weather9°C (48°F)104 mm (4.1 inches)85%moderate
February Weather12°C (54°F)148 mm (5.8 inches)84%high
March Weather16°C (60°F)117 mm (4.6 inches)82%very high
April Weather18°C (65°F)133 mm (5.3 inches)82%extreme
May Weather23°C (74°F)114 mm (4.5 inches)82%extreme
June Weather26°C (79°F)167 mm (6.6 inches)79%extreme
July Weather27°C (81°F)117 mm (4.6 inches)82%extreme
August Weather27°C (81°F)128 mm (5.1 inches)77%extreme
September Weather25°C (78°F)98 mm (3.8 inches)74%very high
October Weather20°C (69°F)107 mm (4.2 inches)73%very high
November Weather13°C (55°F)68 mm (2.7 inches)85%high
December Weather11°C (52°F)123 mm (4.8 inches)88%moderate

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