National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

New Castle Municipal Airport (KUCP)

Lat: 41.02°NLon: 80.42°WElev: 1072ft.

Fair

66°F

19°C

Humidity 68%
Wind Speed Calm
Barometer 30.19 in (1023.4 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 18 Sep 7:56 pm EDT
Extended Forecast for

Petersburg OH

  • Tonight

    Tonight: Increasing clouds, with a low around 56. North wind 5 to 7 mph becoming calm after midnight.

    Low: 56 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 77. East wind 3 to 5 mph.

    High: 77 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 63. Light and variable wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Mostly Cloudy
    then Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 76. Southwest wind around 7 mph becoming west in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers before 2am. Mostly cloudy, with a low around 57. Northeast wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 57 °F

    Chance
    Showers

  • Monday

    Monday: A slight chance of showers after 8am. Mostly cloudy, with a high near 68. Chance of precipitation is 20%.

    High: 68 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Cloudy, with a low around 55. Chance of precipitation is 50%.

    Low: 55 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely. Cloudy, with a low around 54. Chance of precipitation is 60%.

    Low: 54 °F

    Showers
    Likely

Detailed Forecast

Tonight
Increasing clouds, with a low around 56. North wind 5 to 7 mph becoming calm after midnight.
Saturday
Partly sunny, with a high near 77. East wind 3 to 5 mph.
Saturday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 63. Light and variable wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and possibly a thunderstorm. High near 76. Southwest wind around 7 mph becoming west in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A chance of showers before 2am. Mostly cloudy, with a low around 57. Northeast wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
A slight chance of showers after 8am. Mostly cloudy, with a high near 68. Chance of precipitation is 20%.
Monday Night
A chance of showers. Cloudy, with a low around 55. Chance of precipitation is 50%.
Tuesday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Tuesday Night
Showers likely. Cloudy, with a low around 54. Chance of precipitation is 60%.
Wednesday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Thursday
Mostly cloudy, with a high near 64.
Thursday Night
Mostly cloudy, with a low around 52.
Friday
Partly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Petersburg OH
 40.88°N 80.56°W (Elev. 1122 ft)
Last Update:
6:47 pm EDT Sep 18, 2026
Forecast Valid:
8pm EDT Sep 18, 2026-6pm EDT Sep 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation