Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Tropical Storm Gabrielle forms over the Atlantic. See the track forecast. Chevron right
Ash stirring up on Mount St. Helens, read more here. Chevron right

Petersburg, IL

61°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Petersburg

Illinois

61°
No results found.
Try searching for a city, zip code or point of interest.
settings
Petersburg, IL Weather
Today WinterCast Local {stormName} Tracker Hourly Daily 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 Daily Radar MinuteCast® Monthly Air Quality Health & Activities
Thursday, September 18

Current Weather

5:04 AM

61°F
Clear
RealFeel® 63°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
RealFeel®
63°
Wind
ENE 1 mph
Wind Gusts
2 mph
Humidity
89%
Indoor Humidity
69% (Slightly Humid)
Dew Point
57° F
Pressure
↔ 29.98 in
Cloud Cover
0%
Visibility
11 mi
Cloud Ceiling
40000 ft

Day

9/18
94°Hi
RealFeel® 98°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
RealFeel Shade™ 92°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
Partly sunny and hot; caution advised if doing strenuous activities outside
alerts

Air Quality Alert

3:10 PM Friday - 8:00 PM Thursday

Max UV Index6.0 (High)

AccuLumen Brightness Index™9 (Very Bright)

WindE 5 mph

Wind Gusts7 mph

Probability of Precipitation3%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover26%

Morning

Afternoon

Night

9/18
64°Lo
RealFeel® 61°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
Partly cloudy with a thunderstorm in parts of the area
alerts

Air Quality Alert

3:10 PM Friday - 8:00 PM Thursday

WindNNE 5 mph

Wind Gusts7 mph

Probability of Precipitation55%

Probability of Thunderstorms33%

Precipitation0.08 in

Rain0.08 in

Hours of Precipitation1

Hours of Rain1

Cloud Cover46%

Evening

Overnight

Sun & Moon

12 hrs 19 mins
Rise 6:44 AM
Set 7:03 PM
Waning Crescent
Rise 3:19 AM
Set 5:43 PM

Temperature History

9/18
High
Low
Forecast
94°
64°
Average
82°
55°
Last Year
89°
57°
Record
97°
1953
41°
1981

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Hurricane

Gabrielle forms in Atlantic, may track near Bermuda

21 minutes ago

Weather News

Another home collapses into the ocean on North Carolina's Outer Banks

15 hours ago

Weather Forecasts

Final days of summer to bring heat and drought in eastern, central US

1 hour ago

Weather News

Mount St. Helens stirring up leftover ash 45 years after ‘the big one’

23 hours ago

Hurricane

Rain to briefly ease dryness in Southwest, but raise flood risk

2 hours ago

 More Stories

Featured Stories

Live Blog

Does this radar loop show insects or birds?

LATEST ENTRY

Expert debunks claim about weird weather radar

1 day ago

Health

‘Kissing bug’ disease is here to stay in the US, experts say

1 day ago

Travel

Flying cars collide at airshow rehearsal in China

23 hours ago

Recreation

The motor festival that turns the desert into something like ‘Mad Max’

1 day ago

Weather News

Dinosaur eggs from China found to be around 86 million years old

2 days ago
World North America United States Illinois Petersburg

Weather Near Petersburg:

  • 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 RealFeel® and RealFeel Shade™ 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 RealFeel® and RealFeel Shade™ 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
© 2025 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

...

...

...