Last Frost Date Cincinnati: Frost Dates, Late Frost Risk & Growing Season

When is the last spring frost and the first autumn frost in Cincinnati? Frost dates from 30 years of data, the risk of late frost, frost-free days and planting dates.

The frost season in Cincinnati

Last frost (average): April 10
In 1 year out of 10 it still freezes on April 25.
First frost: October 29
Frost-free season: 199 days
Frost after 15 May: in 0 % of years

Frost days per month in Cincinnati

January: 25.8 · -5 °C
February: 22.3 · -3 °C
March: 15.5 · 1 °C
April: 3.5 · 6 °C
May: 0.1 · 12 °C
June: 0 · 17 °C
July: 0 · 19 °C
August: 0 · 18 °C
September: 0 · 14 °C
October: 1.2 · 8 °C
November: 12.3 · 2 °C
December: 22.6 · -2 °C

Matched to the average lows of a weather station 16 km away – accurate to about ±1–2 weeks.
Daily minimum temperatures 2 m above ground over 30 years (1991–2020), NASA POWER; station data: Deutscher Wetterdienst (CC BY 4.0). Ground frost can form while the air at 2 m is still +2 to +3 °C.