Weather forecast for tomorrowOttawa, IL
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 12mphSSW 198°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:10 am CDT
- Sunset: 6:10 pm CDT
- details ▼
On Sunday, in Ottawa, conditions remain stable and sunny, with little cloud presence.
A substantial temperature range, peaking at an enjoyable 66.2°F and bottoming out at an icy 37.4°F, is expected.
Tomorrow's maximum temperature is predicted to be slightly warmer than the common October peak of 61.7°F.
Sunrise will be at 7:10 am and sunset at 6:10 pm; tomorrow's daylight will last for 10h and 59min.
A substantial temperature range, peaking at an enjoyable 66.2°F and bottoming out at an icy 37.4°F, is expected.
Tomorrow's maximum temperature is predicted to be slightly warmer than the common October peak of 61.7°F.
Sunrise will be at 7:10 am and sunset at 6:10 pm; tomorrow's daylight will last for 10h and 59min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 64°C.
Coldest period: 3 am - 6 am 39°C.
Coldest period: 3 am - 6 am 39°C.
Chance of precipitation
Highest chance: 3 am - 6 am 4%.
Hourly weather forecast
- 12 am
- 41°F
- Feels like:39°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 4mphSSW 193°
- Humidity: 80%
- Pressure: 30.45"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 39°F
- Feels like:36°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 4mphSSW 193°
- Humidity: 84%
- Pressure: 30.45"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 39°F
- Feels like:36°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 4mphSSW 193°
- Humidity: 85%
- Pressure: 30.45"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 39°F
- Feels like:34°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 5mphSSW 193°
- Humidity: 84%
- Pressure: 30.45"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:10 am
- 8 am
- 41°F
- Feels like:37°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 6mphSSW 195°
- Humidity: 80%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 52°F
- Feels like:50°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 10mphSSW 201°
- Humidity: 53%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 59°F
- Feels like:57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 12mphSSW 204°
- Humidity: 41%
- Pressure: 30.42"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 2 pm
- 63°F
- Feels like:63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 12mphSSW 202°
- Humidity: 36%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 4 pm
- 64°F
- Feels like:63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphSSW 198°
- Humidity: 33%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 59°F
- Feels like:57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphS 183°
- Humidity: 41%
- Pressure: 30.33"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:10 pm
- 8 pm
- 52°F
- Feels like:50°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 5mphS 178°
- Humidity: 58%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 48°F
- Feels like:46°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphS 183°
- Humidity: 69%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Sunday, a cloudless sky and mainly sunshiny weather are expected.
The temperature will be between the lowest temperature of 37.4°F and the highest temperature of 64.4°F. The warmest part of the day will be at 3 pm and 4 pm.
Tomorrow, the maximum will be moderately higher than the average high for October. The minimum temperature tomorrow will be more in line with November's average low of 33.8°F than October's average of 45.7°F.
The temperature will be between the lowest temperature of 37.4°F and the highest temperature of 64.4°F. The warmest part of the day will be at 3 pm and 4 pm.
Tomorrow, the maximum will be moderately higher than the average high for October. The minimum temperature tomorrow will be more in line with November's average low of 33.8°F than October's average of 45.7°F.
Updated: Oct 17, 2026 @ 20:37:09 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, in Ottawa, skies are expected to be clear and full of sunshine.
Tomorrow, the maximum temperature in Ottawa will be 66.2°F, while the minimum temperature will be 37.4°F.
The maximum temperature tomorrow will be moderately higher than the average highest temperature in October. The lowest temperature will be also a few degrees lower than the average low of 45.7°F.
The maximum temperature tomorrow will be moderately higher than the average highest temperature in October. The lowest temperature will be also a few degrees lower than the average low of 45.7°F.
On Sunday, in Ottawa, sunrise will be at 7:10 am and sunset at 6:10 pm (CDT).
Tomorrow, the daylight will last for 10h and 59min.
