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.
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.
In Collinsville in March, the precipitation amount is 91 mm (3.6 in) spread over 9 days.
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.
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.
UV Risk Categories
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.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -2°C (29°F) | 73 mm (2.9 inches) | 84% | moderate |
February Weather | 0°C (32°F) | 93 mm (3.7 inches) | 82% | moderate |
March Weather | 3°C (38°F) | 91 mm (3.6 inches) | 81% | high |
April Weather | 9°C (48°F) | 136 mm (5.3 inches) | 78% | very high |
May Weather | 15°C (59°F) | 120 mm (4.7 inches) | 69% | very high |
June Weather | 20°C (69°F) | 103 mm (4.1 inches) | 69% | very high |
July Weather | 23°C (74°F) | 162 mm (6.4 inches) | 62% | very high |
August Weather | 22°C (73°F) | 107 mm (4.2 inches) | 65% | very high |
September Weather | 19°C (66°F) | 122 mm (4.8 inches) | 68% | very high |
October Weather | 13°C (56°F) | 152 mm (6.0 inches) | 74% | high |
November Weather | 5°C (42°F) | 95 mm (3.7 inches) | 82% | moderate |
December Weather | 1°C (33°F) | 123 mm (4.9 inches) | 80% | low |