Last frost dates in Maine

Typical last frost
April 26

That is the date for the typical Maine resident, weighted by city population. Across the state the average last frost runs from April 25 to May 16, so look up your own town below.

Earliest city
Apr 25
Latest city
May 16
Typical first frost
Oct 15
Cities
9
This week in Maine

Frost in the forecast for 8 of 9 cities

National Weather Service forecast, updated Oct 22, 11:10 UTC

May 1May 15NSPortland: Apr 26PortlandLewiston: Apr 25LewistonBangor: May 4BangorSouth Portland: Apr 26Auburn: Apr 25Sanford: May 16SanfordBiddeford: May 9BiddefordWestbrook: Apr 26Saco: Apr 26
Each dot is a city: further right means a later last frost, higher up means further north. Bigger dots are bigger cities.

Frost dates by city

CityLast frostSafe afterFirst frostSeason
PortlandApr 26May 7Oct 15170 days
LewistonApr 25May 6Oct 19177 days
BangorMay 4May 17Oct 4152 days
South PortlandApr 26May 7Oct 15170 days
AuburnApr 25May 6Oct 19177 days
SanfordMay 16May 29Sep 30136 days
BiddefordMay 9May 22Oct 3146 days
WestbrookApr 26May 7Oct 15170 days
SacoApr 26May 7Oct 15170 days

When to plant in Maine

Questions

When is the last frost in Maine?

It depends on where you are. Across the 9 cities we track, the average last frost runs from April 25 to May 16. In Portland, the largest, it is April 26.

When is the first frost in Maine?

For a typical resident, around October 15. Higher and more northern towns get it earlier.