Ottawa, OH Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Ottawa, OH in one place.
A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms between 8am and 4pm, then showers and thunderstorms likely. Mostly sunny, with a high near 90. Heat index values as high as 100. West wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Ottawa, OH is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 17, 2026 10:29 AM EDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Ottawa, OH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 10:29 AM EDT
- Forecast office
- IWX
- Source
- NOAA / NWS
Daily Outlook
This Week in Ottawa
Saturday looks like the warmest upcoming period in Ottawa at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Saturday at about 10 to 20 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 10:29 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- IWX
- Radar station
- KIWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 65. Northwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunny, with a high near 83. Northeast wind 5 to 10 mph.
Mostly clear, with a low around 61.
Mostly sunny, with a high near 86.
A slight chance of rain showers between 8pm and 2am, then showers and thunderstorms likely. Partly cloudy, with a low around 70. Chance of precipitation is 60%.
Showers and thunderstorms likely before 8am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 62. Chance of precipitation is 50%.
Sunny, with a high near 79.
Mostly clear, with a low around 57.
Sunny, with a high near 80.
Mostly clear, with a low around 59.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms
|
90°F |
10 to 20 mph
W
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
65°F |
5 to 15 mph
NW
|
|
Sunday
Jul 19
|
Sunny
|
83°F |
5 to 10 mph
NE
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
61°F |
5 to 10 mph
E
|
|
Monday
Jul 20
|
Mostly Sunny
|
86°F |
5 to 10 mph
S
|
|
Monday Night
Jul 20
|
Showers And Thunderstorms Likely
|
70°F |
10 to 15 mph
SW
|
|
Tuesday
Jul 21
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
87°F |
15 to 20 mph
SW
|
|
Tuesday Night
Jul 21
|
Chance Showers And Thunderstorms then Partly Cloudy
|
62°F |
10 to 20 mph
NW
|
|
Wednesday
Jul 22
|
Sunny
|
79°F |
10 to 15 mph
NW
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
57°F |
5 to 15 mph
NW
|
|
Thursday
Jul 23
|
Sunny
|
80°F |
5 mph
N
|
|
Thursday Night
Jul 23
|
Mostly Clear
|
59°F |
5 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ottawa.
