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

Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Rochester, Greater Rochester International Airport (KROC)

Lat: 43.12°NLon: 77.68°WElev: 558ft.

Fair

60°F

16°C

Humidity 96%
Wind Speed SW 5 mph
Barometer 29.93 in (1013.5 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 18 Aug 2:54 am EDT
Extended Forecast for

Caledonia NY

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly clear, with a low around 59. Light northwest wind.

    Low: 59 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 78. Light west wind becoming northwest 5 to 9 mph in the morning.

    High: 78 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 62. West wind around 7 mph becoming south after midnight.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 78. West wind 8 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 57. West wind 3 to 5 mph.

    Low: 57 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 78. Light and variable wind becoming northwest 5 to 8 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. Light and variable wind.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80. Light and variable wind becoming east around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly clear, with a low around 59. Light northwest wind.
Tuesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 78. Light west wind becoming northwest 5 to 9 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 62. West wind around 7 mph becoming south after midnight.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 78. West wind 8 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 57. West wind 3 to 5 mph.
Thursday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 78. Light and variable wind becoming northwest 5 to 8 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 55. Light and variable wind.
Friday
Sunny, with a high near 80. Light and variable wind becoming east around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 59.
Saturday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
Monday
A chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Caledonia NY
 42.97°N 77.87°W (Elev. 699 ft)
Last Update:
2:22 am EDT Aug 18, 2026
Forecast Valid:
3am EDT Aug 18, 2026-6pm EDT Aug 24, 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