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Heavy Rain in the Southern Appalachians; Fire Weather and Heat in the West; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >

Current conditions at

Canandaigua Airport (KIUA)

Lat: 42.91°NLon: 77.33°WElev: 814ft.

Partly Cloudy

75°F

24°C

Humidity 73%
Wind Speed W 6 mph
Barometer 29.93 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 13 Aug 10:15 am EDT
Extended Forecast for

Mendon NY

  • Today

    Today: A slight chance of showers between 11am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 84. West wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 64. Light west wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 82. North wind 5 to 9 mph.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. Light and variable wind.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. Northeast wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.

    High: 91 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. Light and variable wind becoming southwest around 6 mph in the evening.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 50%.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers between 11am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 84. West wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 64. Light west wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly sunny, with a high near 82. North wind 5 to 9 mph.
Thursday Night
Mostly clear, with a low around 59. Light and variable wind.
Friday
Sunny, with a high near 85. Calm wind becoming northeast around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 61. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny and hot, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 67. Light and variable wind becoming southwest around 6 mph in the evening.
Sunday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 50%.
Sunday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mendon NY
 43°N 77.51°W (Elev. 545 ft)
Last Update:
9:40 am EDT Aug 13, 2025
Forecast Valid:
10am EDT Aug 13, 2025-6pm EDT Aug 19, 2025
 
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