Weather forecast for tomorrowPetersburg, IL
Weather forecast for tomorrow
Monday Oct 19, 2026
- 72°F
- 39°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 4mphSSE 162°
- Humidity: 53%
- UV index: 4
- Sunrise: 7:14 am CDT
- Sunset: 6:14 pm CDT
- details ▼
Tomorrow, on Monday, October 19, a glowing sky and minimal clouds are expected.
The day will see a remarkable high of an agreeable 71.6°F, sharply contrasting with a low of a wintry 39.2°F.
Meteorological data shows 71.6°F is more characteristic of September's climate profile than October's.
Sunrise will be at 7:14 am and sunset at 6:14 pm; tomorrow's daylight will last for 11h and 0min.
The day will see a remarkable high of an agreeable 71.6°F, sharply contrasting with a low of a wintry 39.2°F.
Meteorological data shows 71.6°F is more characteristic of September's climate profile than October's.
Sunrise will be at 7:14 am and sunset at 6:14 pm; tomorrow's daylight will last for 11h and 0min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 70°C.
Coldest hour: 6 am 39°C.
Coldest hour: 6 am 39°C.
Chance of precipitation
Highest chance: 6 am 6%.
Hourly weather forecast
- 12 am
- 46°F
- Feels like:43°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 6mphSSE 168°
- Humidity: 77%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 43°F
- Feels like:41°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 4mphSSE 167°
- Humidity: 83%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 41°F
- Feels like:37°F
Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphS 177°
- Humidity: 90%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 39°F
- Feels like:39°F
Clear
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 2mphS 169°
- Humidity: 93%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:14 am
- 8 am
- 41°F
- Feels like:41°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 2mphS 169°
- Humidity: 90%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 55°F
- Feels like:55°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 3mphS 170°
- Humidity: 60%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 64°F
- Feels like:64°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphSSE 169°
- Humidity: 43%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 2 pm
- 68°F
- Feels like:68°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphS 170°
- Humidity: 35%
- Pressure: 30.33"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 4 pm
- 70°F
- Feels like:70°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphSSE 156°
- Humidity: 33%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 63°F
- Feels like:63°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphSE 142°
- Humidity: 46%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:14 pm
- 8 pm
- 54°F
- Feels like:54°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphESE 117°
- Humidity: 67%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 50°F
- Feels like:50°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 2mphESE 118°
- Humidity: 76%
- Pressure: 30.33"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, primarily sunny and occasionally dull weather is forecasted.
The temperature will vary between the lowest temperature of 39.2°F and the highest temperature of 69.8°F. The warmest part of the day will be at 3 pm and 4 pm.
The forecasted maximum is more close to September's typical high of 77.4°F than the average for October. Forecast models suggest a low more resembling November's typical minimum of 36°F than October's usual 47.7°F.
The temperature will vary between the lowest temperature of 39.2°F and the highest temperature of 69.8°F. The warmest part of the day will be at 3 pm and 4 pm.
The forecasted maximum is more close to September's typical high of 77.4°F than the average for October. Forecast models suggest a low more resembling November's typical minimum of 36°F than October's usual 47.7°F.
Updated: Oct 18, 2026 @ 11:19:18 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 Monday, sunny intervals will be long-lasting, with few disruptions.
Tomorrow, the highest temperature will be 71.6°F, while the lowest temperature will be 39.2°F.
The highest temperature will be moderately higher than the average maximum of 63.9°F in October. The lowest temperature will be also relatively lower than the average low of 47.7°F.
The highest temperature will be moderately higher than the average maximum of 63.9°F in October. The lowest temperature will be also relatively lower than the average low of 47.7°F.
On Monday, in Petersburg, sunrise will be at 7:14 am and sunset at 6:14 pm (CDT).
Tomorrow, the daylight will last for 11h and 0min.
