Weather in Collinsville, United States 🇺🇸
Current Weather in Collinsville
Collinsville currently sits at 37°C, sunny, feeling like 44°C. The air is at 45% humidity and winds are about 16 km/h, and the UV index is 6 (high). The next few days in Collinsville look set for about 27°C up to 40°C. ⚠️ Extreme Heat Warning issued September 3 at 12:12AM CDT until September 5 at 8:00PM CDT by NWS St Louis MO
Hourly Forecast for Collinsville
14-Day Forecast for Collinsville
Sunny
Sunny
Sunny
Sunny
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Sunny
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Overcast
Sunny
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Light rain shower
Sunny
Sunny
Additional Forecasts for Collinsville
Air Quality
Historical Weather
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Best Time to Be Outside in Collinsville Today
The most comfortable window in Collinsville today looks like 17:00 to 20:00, when it is around 36°C. It should stay dry through that window. No significant rain is expected in the next several hours.
Frequently Asked Questions about Weather in Collinsville
What is the temperature in Collinsville right now?
Collinsville is sitting at 37°C (99°F) right now, sunny (feels like 44°C).
What's the weather like in Collinsville right now?
Current weather in Collinsville: Sunny, humidity 45%, wind 16 km/h SW.
What is today's forecast for Collinsville?
Today in Collinsville: high 39°C, low 27°C, sunny. Chance of rain: 3%.
What is the 7-day weather forecast for Collinsville?
Daily highs and lows for Collinsville:
- 2026-09-03: 39°C / 27°C
- 2026-09-04: 39°C / 27°C
- 2026-09-05: 40°C / 28°C
- 2026-09-06: 34°C / 22°C
- 2026-09-07: 32°C / 16°C
- 2026-09-08: 38°C / 20°C
- 2026-09-09: 42°C / 27°C
Is it going to rain in Collinsville today?
There is a 3% chance of rain in Collinsville today.
What is the wind speed in Collinsville right now?
Wind in Collinsville is currently 16 km/h (10 mph) from the SW.
What is the UV index in Collinsville right now?
The UV index in Collinsville is currently 6.2 (high). Sun protection is recommended when the index is 3 or higher.
