Last updated: June 24, 2025
In October, the average temperature in Collinsville, United States hovers around 13°C (56°F). Be prepared for a wide range, as temperatures can dip to a brisk -5°C (24°F) or soar to a warm 30°C (86°F). Expect about 152 mm (6.0 in) of precipitation over approximately 12 days, contributing to an average humidity level of 74%.
In October in Collinsville, the average temperature is 13°C (56°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop to as low as -5°C (24°F). Expect a wide range of temperatures, so be sure to pack accordingly for your travels.
In Collinsville in October, the total precipitation amount is 152 mm (6.0 in), which falls over the course of 12 days.
In Collinsville in October humidity is 74%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, especially for travelers unaccustomed to such conditions.
In Collinsville in October, 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 October’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 |