Dayton, OH All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Dayton, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 107.9°F (42°C) | July 22, 1901 |
| Record Low | -27.9°F (-33°C) | February 13, 1899 |
| Lowest High | -7.9°F (-22°C) | January 17, 1977 |
| Highest Low | 82.9°F (28°C) | July 31, 1999 and June 29, 2021 |
| Highest Mean | 93.5°F (34°C) | July 21, 1934 |
| Lowest Mean | -12.9°F (-25°C) | February 9, 1899 and January 17, 1977 and January 21, 1985 |
| Precipitation | ||
| Max in One Calendar Day | 4.65" (118.1 mm) | September 14, 1979 |
| Max in One Month | 11.74" (298.3 mm) | January 1937 |
| Least in One Month | 0.00" (0.0 mm) | September 2007 |
| Max in One Year | 60.84" (1545.4 mm) | 2011 |
| Least in One Year | 23.76" (603.5 mm) | 1934 |
| Snowfall | ||
| Max in One Calendar Day | 10.5" (26.7 cm) | February 17, 1910 and November 26, 1950 |
| Max in One Month | 31.6" (80.2 cm) | February 1910 |
| Max in One Season | 50.5" (128.2 cm) | 1909-10 |
| Max in One Year | 48.3" (122.7 cm) | 1906 |
| Earliest Snow | 1.0" (2.5 cm) | October 19, 1989 |
| Earliest Measurable Snow | 1.0" (2.5 cm) | October 19, 1989 |
| Latest Snow | 1.2" (3.0 cm) | May 9, 1923 |
| Latest Measurable Snow | 1.2" (3.0 cm) | May 9, 1923 |
| Period of Record | ||
| Temperature | June 1, 1893 – August 18, 2021 | |
| Precipitation | June 2, 1893 – July 31, 2026 | |
| Snowfall | December 1, 1893 – April 30, 2016 | |
Note: Records compiled from NOAA GHCN-Daily observations at DAYTON MCD (5 mi from Dayton, OH). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in Dayton, OH?
The all-time record high in Dayton, OH is 107.9°F (42°C), set on July 22, 1901.
What is the coldest temperature ever recorded in Dayton, OH?
The all-time record low in Dayton, OH is -27.9°F (-33°C), set on February 13, 1899.
What is the most rain Dayton, OH has ever had in one day?
The most precipitation recorded in one calendar day near Dayton, OH is 4.65 inches, on September 14, 1979.
What is the biggest snowfall ever recorded in Dayton, OH?
The most snow recorded in one calendar day near Dayton, OH is 10.5 inches, on February 17, 1910 and November 26, 1950.
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