Local weather forecast

Weather in Chesterfield, IL

Updated 2026-08-11 12:45 local time · ZIP codes 62630

Sunny
Now85°F

Sunny

High / Low98° / 75°
Rain chance4%
Wind15 mph
Weather alerts

Active alerts

1
Heat Advisory issued August 11 at 2:17AM CDT until August 12 at 8:00PM CDT by NWS St Louis MO

* WHAT...Heat index values up to 106. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Safety instructions

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Hourly

Next hours

NowSunny85°3% rain
2 PMSunny98°1% rain
3 PMSunny98°1% rain
4 PMSunny98°1% rain
5 PMSunny97°1% rain
6 PMSunny95°1% rain
7 PMSunny92°1% rain
8 PMSunny88°2% rain
9 PMClear86°3% rain
10 PMClear83°4% rain
11 PMClear81°4% rain
12 AMClear80°4% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
98° 75°Sunny
Rain 4%Gust 15 mph
Tomorrow2026-08-12
Sunny
88° 76°Sunny
Rain 57%Gust 11 mph
Thursday2026-08-13
Sunny
91° 71°Sunny
Rain 61%Gust 16 mph
Conditions

Weather details

Feels like89°F
Humidity70%
Pressure29.98 inHg
Visibility10 mi
Wind15 mph SW
Wind gusts19 mph
Precipitation0.00 in
UV index7
Daylight

Sunrise, sunset and moon

Sunrise06:09 AM
Sunset08:01 PM
Moonrise04:12 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Umbrella not essential

Rain chance stays relatively low over the next 12 hours (up to 4%).

Choose light, breathable clothing

It feels like 89°F with winds near 15 mph.

Best window: 8 PM

88°F, 2% rain chance and 8 mph wind.

Driving conditions look generally normal

Visibility is around 10 mi; gusts may reach 20 mph.

Run with a few weather adjustments

Current temperature is 85°F, wind 15 mph, rain chance up to 4%.

High UV protection needed

UV index is 7. Sunscreen, shade and protective clothing are recommended.

Chesterfield weather today

Sunny and 85°F in Chesterfield, IL. Today's high is 98°F with a 4% rain chance. Winds are around 15 mph with gusts near 19 mph. Relative humidity is 70%, pressure is 29.98 inHg, and visibility is about 10 miles.

Tonight and tomorrow in Chesterfield

Sunrise is at 06:09 AM and sunset is at 08:01 PM. Tomorrow's forecast calls for Sunny with a high near 88°F and a low near 76°F. The maximum rain chance is 57%.

Nearby

Weather near Chesterfield

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