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March Weather in Collinsville, United States

Last updated: June 24, 2025

In March, the average temperature in Collinsville, United States hovers around 3°C (38°F). Expect extremes, with lows dropping to -16°C (3°F) and highs peaking at a warm 24°C (75°F). The month brings about 91 mm (3.6 in) of precipitation spread over 9 days, and with an average humidity of 81%, it’s a time of significant atmospheric moisture.

March Temperature in Collinsville

In March in Collinsville, the average temperature is 3°C (38°F). Maximums can reach up to 24°C (75°F), while minimums can drop as low as -16°C (3°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for their trip.

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

The chart illustrates March 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, March typically has an average temperature of 3°C (38°F), with highs reaching up to 24°C (75°F) and lows dropping to around -16°C (3°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.

March Precipitation in Collinsville

In Collinsville in March, the precipitation amount is 91 mm (3.6 in) spread over 9 days.

March Precipitation Trends in Collinsville

The chart displays monthly precipitation patterns in Collinsville, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Collinsville, March typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec73939113612010316210712215295123
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Collinsville

In Collinsville in March, humidity is 81%. With an average temperature of 3°C (38°F), this humidity feels like a heavy blanket wrapped around you, making outdoor activities uncomfortable and travel challenging due to the cold, damp air.

March Average Humidity in Collinsville

This chart illustrates the average monthly humidity levels in Collinsville, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Collinsville is approximately 81%, 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 March generated using information from the Copernicus Climate Change Service.

March UV Index in Collinsville

In Collinsville in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Collinsville, you can refer to this Hourly UV Index in Collinsville.

Maximum UV Index Levels in Collinsville for March

The chart shows the monthly maximum UV Index (UVI) for Collinsville in March, 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 March, the maximum UV index in Collinsville typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Collinsville March 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 March 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 March’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 March’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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