National Weather Service Forecast for: Tonawanda NY
Issued by: National Weather Service Buffalo, NY
Updated: 9:57 am EDT Jun 30, 2026
 
Today

Today: A slight chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind 11 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Slight Chance
T-storms

 Tonight

Tonight: Partly cloudy, with a low around 75. Southwest wind 8 to 10 mph.
Partly Cloudy

 Wednesday

Wednesday: Mostly sunny and hot, with a high near 90. Heat index values as high as 98. Southwest wind 10 to 15 mph.
Hot

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 74. Southwest wind 6 to 10 mph.
Mostly Clear

 Thursday

Thursday: Sunny and hot, with a high near 93. Southwest wind 8 to 14 mph, with gusts as high as 24 mph.
Hot

 Thursday
Night
Thursday Night: A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74. Southwest wind 6 to 9 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers

 Friday

Friday: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Southwest wind 5 to 9 mph. Chance of precipitation is 30%.
Mostly Sunny
then Chance
T-storms
 Friday
Night
Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Southwest wind 3 to 7 mph. Chance of precipitation is 50%.
Chance
T-storms

 Independence
Day
Independence Day: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Chance
Showers then
Chance
T-storms
Hi 90 °F Lo 75 °F Hi 90 °F Lo 74 °F Hi 93 °F Lo 74 °F Hi 90 °F Lo 69 °F Hi 84 °F

Heat Advisory
Extreme Heat Watch
Hazardous Weather Outlook
 

Today
 
 A slight chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind 11 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Tonight
 
 Partly cloudy, with a low around 75. Southwest wind 8 to 10 mph.
Wednesday
 
 Mostly sunny and hot, with a high near 90. Heat index values as high as 98. Southwest wind 10 to 15 mph.
Wednesday Night
 
 Mostly clear, with a low around 74. Southwest wind 6 to 10 mph.
Thursday
 
 Sunny and hot, with a high near 93. Southwest wind 8 to 14 mph, with gusts as high as 24 mph.
Thursday Night
 
 A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74. Southwest wind 6 to 9 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Southwest wind 5 to 9 mph. Chance of precipitation is 30%.
Friday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Southwest wind 3 to 7 mph. Chance of precipitation is 50%.
Independence Day
 
 A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Saturday Night
 
 A chance of thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Sunday
 
 Mostly sunny, with a high near 84.
Sunday Night
 
 A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Monday
 
 A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Tonawanda NY.