Weather forecast for 10 daysPetersburg, IL
Weather forecast for the weekend
Sunday Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 11mphS 179°
- Humidity: 51%
- UV index: 4
- Sunrise: 7:13 am CDT
- Sunset: 6:15 pm CDT
- details ▼
On Sunday, in Petersburg, clear skies and sunshine are anticipated.
Temperature measurements will peak at a comfortable 66.2°F, with a considerable drop to a low of a cold 37.4°F.
Today, the predicted maximum temperature should be consistent with October's typical high of 63.9°F.
Sunrise will be at 7:13 am and sunset at 6:15 pm; the daylight will last for 11h and 2min.
Temperature measurements will peak at a comfortable 66.2°F, with a considerable drop to a low of a cold 37.4°F.
Today, the predicted maximum temperature should be consistent with October's typical high of 63.9°F.
Sunrise will be at 7:13 am and sunset at 6:15 pm; the daylight will last for 11h and 2min.
10-day overview
Daily temperatures
Warmest day: Sunday 25.10. 81°C.
Coldest day: today 66°C.
Coldest day: today 66°C.
Chance of precipitation
Highest chance: Tuesday 27.10. 12%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 11mphS 179°
- Humidity: 51%
- UV index: 4
- Sunrise: 7:13 am CDT
- Sunset: 6:15 pm CDT
- details ▼
- 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 ▼
- Tuesday
- Oct 20, 2026
- 73°F
- 41°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphESE 118°
- Humidity: 51%
- UV index: 4
- Sunrise: 7:15 am CDT
- Sunset: 6:12 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 75°F
- 43°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 2mphSSE 167°
- Humidity: 51%
- UV index: 4
- Sunrise: 7:16 am CDT
- Sunset: 6:11 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 77°F
- 43°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphE 92°
- Humidity: 53%
- UV index: 4
- Sunrise: 7:17 am CDT
- Sunset: 6:09 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 77°F
- 46°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSE 128°
- Humidity: 52%
- UV index: 4
- Sunrise: 7:18 am CDT
- Sunset: 6:08 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 79°F
- 50°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 8mphSSE 154°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:19 am CDT
- Sunset: 6:07 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 81°F
- 50°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 6mphSSW 197°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:20 am CDT
- Sunset: 6:05 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 77°F
- 50°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 6mphSSW 196°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:22 am CDT
- Sunset: 6:04 pm CDT
- details ▼
- Tuesday
- Oct 27, 2026
- 75°F
- 52°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 6mphSE 142°
- Humidity: 54%
- UV index: 3
- Sunrise: 7:23 am CDT
- Sunset: 6:03 pm CDT
- details ▼
For the next ten days, a combination of sunny and cloud-filled weather is anticipated.
Rainfall is not expected in Petersburg in the upcoming period.
Substantial differences in temperature are forecasted throughout the forecast window. Maximum temperatures are forecasted between 66.2°F and 80.6°F, while the variation in nighttime lows will be also notably wide, as temperatures overnight will fluctuate from 37.4°F up to 51.8°F.
Next Sunday is expected to be the warmest, reaching up to 80.6°F; today is the coldest day, with a maximum temperature of 66.2°F.
Rainfall is not expected in Petersburg in the upcoming period.
Substantial differences in temperature are forecasted throughout the forecast window. Maximum temperatures are forecasted between 66.2°F and 80.6°F, while the variation in nighttime lows will be also notably wide, as temperatures overnight will fluctuate from 37.4°F up to 51.8°F.
Next Sunday is expected to be the warmest, reaching up to 80.6°F; today is the coldest day, with a maximum temperature of 66.2°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
Today, in Petersburg, sunshine will likely continue with scattered clouds at most.
Today, the maximum temperature will be 66.2°F, while the minimum temperature will be 37.4°F.
The maximum temperature will be in line with the average highest temperature of 63.9°F in October. Today, the lowest temperature will be notably lower than the average low of 47.7°F.
The maximum temperature will be in line with the average highest temperature of 63.9°F in October. Today, the lowest temperature will be notably lower than the average low of 47.7°F.
On Sunday, in Petersburg, sunrise will be at 7:13 am and sunset at 6:15 pm (CDT).
Today, the daylight will last for 11h and 2min.
