Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Tropical Storm Moke forms, to sideswipe Hawaii. Click for the forecast. Chevron right
Washington, D.C., Philly and NYC face flash flood risk. Click for travel impacts. Chevron right

St. Jacob, IL

72°F
Location Chevron down
Location News Videos
Use Current Location
Recent

St. Jacob

Illinois

72°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
St. Jacob, IL Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps
News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel
For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center
Today Hourly

10-Day

 Radar MinuteCast® Monthly Air Quality Health & Activities

Unlock extended 90-day forecasts

Activate Your Premium+ Subscription

Chevron right

August 22 - September 5

Sat 8/22

87° /61°
55%
Partly sunny with a thunderstorm in parts of the area

RealFeel®91°

RealFeel Shade™86°

Max UV Index8.0 (Very High)

WindNNW 8 mph

Total Hours of Precipitation1

Total Hours of Rain1

Sun 8/23

82° /59°
2%
Partly sunny and delightful

RealFeel®88°

RealFeel Shade™80°

Max UV Index8.0 (Very High)

WindN 6 mph

Mon 8/24

81° /62°
25%
Sun and areas of high clouds in the morning followed by solid cloud cover in the afternoon

RealFeel®84°

RealFeel Shade™81°

Max UV Index4.0 (Moderate)

WindESE 5 mph

Tue 8/25

84° /63°
21%
Mostly cloudy and humid

RealFeel®90°

RealFeel Shade™85°

Max UV Index5.0 (Moderate)

WindESE 7 mph

Wed 8/26

85° /62°
55%
Watch for a strong morning thunderstorm; humid with partial sunshine

RealFeel®100°

RealFeel Shade™91°

Max UV Index8.0 (Very High)

WindESE 2 mph

Total Hours of Precipitation1

Total Hours of Rain1

Thu 8/27

87° /63°
13%
Mostly sunny and humid

RealFeel®98°

RealFeel Shade™89°

Max UV Index8.0 (Very High)

WindSW 4 mph

Fri 8/28

81° /61°
2%
Plenty of sun

RealFeel®90°

RealFeel Shade™83°

Max UV Index8.0 (Very High)

WindN 4 mph

Sat 8/29

82° /59°
2%
Partly sunny

RealFeel®90°

RealFeel Shade™82°

Max UV Index8.0 (Very High)

WindSE 2 mph

Sun 8/30

80° /63°
79%
Mostly cloudy and humid; rain and a thunderstorm in the morning followed by a thunderstorm in the afternoon

RealFeel®92°

RealFeel Shade™87°

Max UV Index3.0 (Moderate)

WindSSE 7 mph

Total Hours of Precipitation5

Total Hours of Rain5

Mon 8/31

80° /58°
1%
Mostly sunny

RealFeel®85°

RealFeel Shade™80°

Max UV Index7.0 (High)

WindSE 5 mph

Tue 9/1

82° /59°
1%
Humid with plenty of sunshine

RealFeel®92°

RealFeel Shade™87°

Max UV Index7.0 (High)

WindS 5 mph

Wed 9/2

81° /59°
20%
Partly sunny and humid

RealFeel®94°

RealFeel Shade™89°

Max UV Index7.0 (High)

WindNW 9 mph

Thu 9/3

84° /58°
20%
Mostly sunny and humid

RealFeel®88°

RealFeel Shade™82°

Max UV Index7.0 (High)

WindNNW 9 mph

Fri 9/4

84° /64°
25%
Mostly cloudy and less humid

RealFeel®82°

RealFeel Shade™82°

Max UV Index2.0 (Low)

WindN 8 mph

Sat 9/5

78° /61°
5%
Sunny

RealFeel®82°

RealFeel Shade™76°

Max UV Index7.0 (High)

WindNE 7 mph

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Climate

The 2026 El Niño could become the strongest in a lifetime

1 day ago

Hurricane

Back-to-back tropical threat for Hawaii, impacts to start this weekend

15 hours ago

Hurricane

Hawaii braces for Moke as Lala power outages linger

8 hours ago

Severe Weather

10 days in the dark: Indiana derecho leaves thousands waiting for powe...

14 hours ago

Severe Weather

Rare tornadoes struck Delaware and Long Island on Thursday

12 hours ago

 More Stories

Featured Stories

Weather News

Lala leaves Hawaii communities buried in mud, communication cut off

2 days ago

Weather Forecasts

Fall allergy forecast: Weed, grass pollen to surge in parts of US

16 hours ago

Severe Weather

Lightning kills man in Virginia amid more than 500 nearby strikes

15 hours ago

Recreation

250-pound black bear dies after becoming trapped in Colorado car

2 days ago

Climate

Lake Powell sinks to record low as Colorado River crisis deepens

3 days ago
World North America United States Illinois St. Jacob

Weather Near St. Jacob:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...