Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
As a new heat dome builds, western U.S. wildfires will increase. More information here. Chevron right
The risk of flash flooding has shifted to coastal areas of the southeastern U.S. Click for details. Chevron right

Ottawa, IL

77°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Ottawa

Illinois

77°
No results found.
Try searching for a city, zip code or point of interest.
settings
Ottawa, 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

August

January February March April May June July August September October November December

2025

2024 2025 2026

Daily
S
M
T
W
T
F
S
27
87°
70°
28
87°
70°
29
88°
72°
30
74°
63°
31
75°
55°
1
77°
57°
2
77°
53°
3
82°
56°
4
82°
64°
5
85°
63°
6
87°
65°
7
86°
66°
8
85°
69°
9
87°
70°
10
84°
66°
11
84°
63°
12
83°
64°
13
85°
65°
14
86°
65°
15
82°
63°
16
85°
67°
17
85°
67°
18
84°
66°
19
85°
67°
20
84°
66°
21
83°
64°
22
83°
65°
23
84°
66°
24
85°
66°
25
85°
65°
26
84°
66°
27
81°
64°
28
80°
65°
29
80°
65°
30
83°
64°
31
84°
65°
1
84°
65°
2
83°
64°
3
83°
65°
4
82°
64°
5
83°
63°
6
83°
63°

Temperature Graph

°F
90° 82° 74° 66° 58° Aug
Today 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

Further Ahead

September 2025

October 2025

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Northeast's weather fate for upcoming week depends on dry air wedge

6 hours ago

Severe Weather

Torrential rain, deadly flash flooding slam I-95 corridor

3 hours ago

Severe Weather

Torrential downpours to pose dangerous flash flood risk in Southeast

2 hours ago

Astronomy

3 big astronomy events packed into 1 week in August sky

1 day ago

Weather Forecasts

Building western US heat dome may set records, cause fires to surge

3 hours ago

 More Stories

Featured Stories

Weather News

Weather sparks firefly mania, but will it last?

1 day ago
Live Blog

Clearing the air: Heat index of 182 degrees in Iran likely false

LATEST ENTRY

Heat index challenges world record, but is it real?

1 day ago

Travel

US Navy F-35 crashes in California, pilot ejects safely

2 days ago

Severe Weather

How to tell how far away lightning is by counting

2 days ago

Travel

Flights at UK airports hit by major technical issue

2 days ago
World North America United States Illinois Ottawa

Weather Near Ottawa:

  • Chicago, IL
  • Joliet, IL
  • Naperville, IL
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

...

...

...