NWS Forecast for Fairfield OH

National Weather Service Forecast for: Fairfield OH
Issued by: National Weather Service Wilmington, OH

Updated: 2:36 am EDT Jun 30, 2026

Overnight Patchy Fog	Tuesday Patchy Fog then Sunny	Tuesday Night Mostly Clear	Wednesday Hot	Wednesday Night Clear	Thursday Sunny	Thursday Night Mostly Clear	Friday Chance T-storms	Friday Night Partly Cloudy
Lo 74 °F	Hi 95 °F	Lo 74 °F	Hi 97 °F	Lo 74 °F	Hi 96 °F	Lo 75 °F	Hi 93 °F	Lo 74 °F

Hazardous Weather Outlook
Extreme Heat Warning

Overnight	Patchy fog. Otherwise, partly cloudy, with a low around 74. Calm wind.
Tuesday	Patchy fog before 8am. Otherwise, sunny, with a high near 95. Heat index values as high as 107. Calm wind becoming southwest 5 to 8 mph in the morning.
Tuesday Night	Mostly clear, with a low around 74. Southwest wind around 5 mph becoming calm in the evening.
Wednesday	Sunny and hot, with a high near 97. Heat index values as high as 107. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night	Clear, with a low around 74. Calm wind.
Thursday	Sunny, with a high near 96.
Thursday Night	Mostly clear, with a low around 75.
Friday	A chance of showers and thunderstorms. Partly sunny, with a high near 93. Chance of precipitation is 30%.
Friday Night	Partly cloudy, with a low around 74.
Independence Day	A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Saturday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.
Sunday	A chance of showers and thunderstorms. Partly sunny, with a high near 91. Chance of precipitation is 40%.
Sunday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Monday	A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.

Forecast from NOAA-NWS for Fairfield OH.