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

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

The frost season in Pontiac

Last frost (average): April 12
In 1 year out of 10 it still freezes on April 28.
First frost: November 2
Frost-free season: 201 days
Frost after 15 May: in 0 % of years

Frost days per month in Pontiac

January: 27.7 · -7 °C
February: 25.1 · -6 °C
March: 20.9 · -2 °C
April: 5.2 · 4 °C
May: 0.1 · 10 °C
June: 0 · 16 °C
July: 0 · 18 °C
August: 0 · 17 °C
September: 0 · 13 °C
October: 1 · 7 °C
November: 13.3 · 1 °C
December: 24.8 · -4 °C

Matched to the average lows of a weather station 44 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.