Weather in St. Charles, United States 🇺🇸
Current Weather in St. Charles
St. Charles currently sits at 35°C, sunny, feeling like 39°C. Expect 44% humidity and winds of about 17 km/h, and the UV index is 3 (moderate). In the days ahead, expect temperatures in St. Charles from about 21°C to 35°C. ⚠️ Extreme Heat Warning issued September 3 at 1:08AM CDT until September 3 at 7:00PM CDT by NWS Chicago IL
Hourly Forecast for St. Charles
14-Day Forecast for St. Charles
Sunny
Sunny
Sunny
Sunny
Overcast
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Overcast
Sunny
Patchy rain nearby
Light rain shower
Sunny
Sunny
Additional Forecasts for St. Charles
Air Quality
Historical Weather
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Best Time to Be Outside in St. Charles Today
The most comfortable window in St. Charles today looks like 15:00 to 18:00, when it is around 32°C. It should stay dry through that window. The next likely rain is around 18:00.
Frequently Asked Questions about Weather in St. Charles
What is the temperature in St. Charles right now?
It is currently 35°C (96°F) in St. Charles, sunny (feels like 39°C).
What's the weather like in St. Charles right now?
Current weather in St. Charles: Sunny, humidity 44%, wind 17 km/h SW.
What is today's forecast for St. Charles?
Today in St. Charles: high 35°C, low 23°C, sunny. Chance of rain: 57%.
What is the 7-day weather forecast for St. Charles?
Daily highs and lows for St. Charles:
- 2026-09-03: 35°C / 23°C
- 2026-09-04: 30°C / 21°C
- 2026-09-05: 28°C / 21°C
- 2026-09-06: 25°C / 18°C
- 2026-09-07: 24°C / 18°C
- 2026-09-08: 24°C / 18°C
- 2026-09-09: 26°C / 23°C
Is it going to rain in St. Charles today?
There is a 57% chance of rain in St. Charles today. Total expected precipitation: 1.72 mm.
What is the wind speed in St. Charles right now?
Wind in St. Charles is currently 17 km/h (11 mph) from the SW.
What is the UV index in St. Charles right now?
The UV index in St. Charles is currently 3.3 (moderate). Sun protection is recommended when the index is 3 or higher.
