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Collinsville, United States Snapshot 2026
Where is Collinsville?
Collinsville, United States
- Continent
- Americas
- Country
- United States
- City
- Collinsville
- Population
- 24.8K
- Elevation
- 171 m
- Coordinates
- 38.67°, -89.98°
Collinsville is a city in United States with a population of approximately 24.8K. Average temperatures range from -3°C (26°F) in January to 31°C (88°F) in July. The best time to visit is May, June, August, September, October. The city sits at an elevation of 171 m above sea level.
Time in Collinsville right now
Open full time & time zone page 13:17 17
Monday, June 15, 2026
IANA time zone
America/Chicago
Daylight saving
DST in effect
CST / CDT
Next DST change
November 1
backward -1h
Live weather in Collinsville
Daylight in Collinsville today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 51m
Climate normals for Collinsville
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Fair April
Good May best
Excellent June best
Excellent July
Fair August best
Excellent September best
Excellent October best
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -3°C | 1°C / -8°C | 8days (77 mm) Wet | 5.4h Fair | 69% Muggy | 2.7 Moderate | Poor | View Details |
| February | 9°C / -1°C | 5°C / -6°C | 8days (70 mm) Wet | 6.8h Fair | 66% Muggy | 3.7 Moderate | Poor | View Details |
| March | 15°C / 4°C | 12°C / 1°C | 12days (121 mm) Wet | 7.5h Good | 64% Muggy | 5.2 High | Fair | View Details |
| April | 19°C / 9°C | 18°C / 6°C | 12days (139 mm) Wet | 8.9h Good | 63% Muggy | 5.7 High | Good | View Details |
| May best | 25°C / 15°C | 25°C / 14°C | 13days (131 mm) Wet | 9.8h Good | 68% Muggy | 6.9 High | Excellent | View Details |
| June best | 30°C / 20°C | 33°C / 22°C | 10days (95 mm) Wet | 11.9h Excellent | 65% Muggy | 7.3 Very High | Excellent | View Details |
| July | 31°C / 22°C | 35°C / 25°C | 12days (116 mm) Wet | 11.9h Excellent | 71% Muggy | 7.4 Very High | Fair | View Details |
| August best | 30°C / 21°C | 33°C / 23°C | 10days (111 mm) Wet | 10.9h Excellent | 71% Muggy | 6.8 High | Excellent | View Details |
| September best | 28°C / 18°C | 29°C / 19°C | 7days (80 mm) Good | 10.1h Excellent | 67% Muggy | 5.8 High | Excellent | View Details |
| October best | 21°C / 12°C | 20°C / 10°C | 8days (82 mm) Wet | 7.8h Good | 66% Muggy | 4.3 Moderate | Good | View Details |
| November | 13°C / 5°C | 10°C / 1°C | 8days (70 mm) Wet | 6.7h Fair | 68% Muggy | 3 Moderate | Fair | View Details |
| December | 8°C / 0°C | 4°C / -4°C | 8days (62 mm) Wet | 5.6h Fair | 70% Muggy | 2.3 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 5°C / -3°C . Feb: 9°C / -1°C . Mar: 15°C / 4°C . Apr: 19°C / 9°C . May: 25°C / 15°C . Jun: 30°C / 20°C . Jul: 31°C / 22°C . Aug: 30°C / 21°C . Sep: 28°C / 18°C . Oct: 21°C / 12°C . Nov: 13°C / 5°C . Dec: 8°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 77 mm. Feb: 70 mm. Mar: 121 mm. Apr: 139 mm. May: 131 mm. Jun: 95 mm. Jul: 116 mm. Aug: 111 mm. Sep: 80 mm. Oct: 82 mm. Nov: 70 mm. Dec: 62 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 69%. Feb: 66%. Mar: 64%. Apr: 63%. May: 68%. Jun: 65%. Jul: 71%. Aug: 71%. Sep: 67%. Oct: 66%. Nov: 68%. Dec: 70%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 19 km/h . Mar: 20 km/h . Apr: 20 km/h . May: 17 km/h . Jun: 15 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 14 km/h . Oct: 17 km/h . Nov: 18 km/h . Dec: 18 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Collinsville has a population of approximately 24.8K.
The best months to visit Collinsville are May, June, August, September, October, when temperatures are pleasant and rainfall is lower.
Collinsville receives approximately 1154mm of rainfall annually across 116 rainy days.
Collinsville is located in United States, in the Americas region.
Collinsville sits at an elevation of 171 m (561 ft) above sea level.