Your nature year
Bangor, Mainethrough the year
When do frost, green-up and fall color come to Bangor?
Spring green-up reaches town around Apr 23, with first blooms around May 21. Expect about 153 frost-free days in Bangor: the last spring frost usually comes around May 4, the first fall one around Oct 4, going by NOAA's Bangor International Airport station 2.6 miles away. Across Maine, fall color is usually well under way by mid-October. Within 150 miles we follow 17 places, out to Waterville Valley 147 miles to the southwest. Acadia, 39 miles from Bangor, is the nearest fall foliage spot on this site, usually at its best Oct 11–20. Bangor sits at about 203 feet.
Updated Sep 28. Sources: US Census Bureau, 2024 Gazetteer (places) ↗ (opens in a new tab), US Census Bureau, city and town population estimates, 2024 ↗ (opens in a new tab), NOAA NCEI U.S. Climate Normals 1991–2020 (annual/seasonal) ↗ (opens in a new tab)
Best this weekend nearby
- Nulhegan Basin · 147 mi · Fall foliage
Usually Oct 1–10
Sat Oct 3: Mostly Sunny, 55°F · Sun Oct 4: Mostly Sunny then Chance Rain Showers, 58°F
No report yet
Places in their own usual window that weekend; reports are the latest official ones, forecasts from the National Weather Service. 5 more nearby places have only regional or statewide timing, so they aren't listed.
Bangor's year at a glance
- Frost possible
- Frost-free, ~May 4 to ~Oct 4
- First leaf ~Apr 23
- First bloom ~May 21
- Fall color under way ~Oct 11 (ME)
- Today
Near Bangor right now
- Fall color is usually well under way by mid-October in MaineStatewide · USA-NPN volunteer observations, 2020–2025 · not a forecast~13 days
- First fall frost usually around Oct 4 · last spring frost around May 4NOAA 1991–2020 normals, Bangor International Airport (2.6 mi, 50% dates)~6 days
- Fall foliage · Acadia · 39 miusually Oct 11–20~13 days
Bangor's nature year
- Spring green-upApr
- Last spring frostMay
- Fall color (ME)Oct
- First fall frostOct
Nearby, season by season
Fall foliage
- Acadia · 39 miusually Oct 11–20~13 days
- Camden Hills State Park · 43 miStatewide: usually well under way by mid-October~10 days
- Lily Bay State Park · 63 miStatewide: usually well under way by mid-October~10 days
Snow in Bangor
Snow usually becomes possible around Nov 23 (our calculation from NOAA's daily snow chances: the first day the chance of 0.1" or more of snow reaches 10%). NOAA's normals at Bangor International Airport (2.6 mi away): 75 inches of snow in an average year, about 20.6 days with 1 inch or more.
NOAA's chance of at least 0.1 inch of snow on each date (one value per week, September to May), averaged over 1991–2020. A typical year, not a forecast.
Frost and green-up
Last spring frost
May 4
Average (50% date)
First fall frost
Oct 4
About 153 days without frost between
Spring green-up
Apr 23
First bloom around May 21
Frost: NOAA 1991–2020 climate normals at Bangor International Airport (2.6 mi from Bangor), the day a 32 °F night is as likely as not. Green-up: the USA-NPN Spring Index, 1991–2020 average at the town.
Questions people ask
When is the first frost in Bangor?
On average around Oct 4, and the last spring frost around May 4: about 153 days without frost between. These are NOAA's 1991–2020 normals at Bangor International Airport, 2.6 miles away (the day a 32 °F night is as likely as not).
When does spring green-up reach Bangor?
The USA-NPN Spring Index puts first leaf around Apr 23 and first bloom around May 21, on average for 1991–2020 at the town.
Where can I see fall foliage near Bangor?
Acadia, 39 miles (usually Oct 11–20); Camden Hills State Park, 43 miles (statewide: usually well under way by mid-October); Lily Bay State Park, 63 miles (statewide: usually well under way by mid-October). Distances are straight-line.
When does it start snowing in Bangor?
Snow usually becomes possible around Nov 23: our calculation from NOAA's daily snow chances: the first day the chance of 0.1" or more of snow reaches 10%, at Bangor International Airport. An average year brings 75 inches (NOAA 1991–2020). A typical year, not a forecast.Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (annual/seasonal snowfall) ↗ (opens in a new tab), NOAA NCEI U.S. Climate Normals 1991–2020 (daily snowfall probabilities) ↗ (opens in a new tab)
How we know
US Census Bureau, 2024 Gazetteer (places) (opens in a new tab) (Sep 27) · US Census Bureau, city and town population estimates, 2024 (opens in a new tab) (Sep 27) · NOAA NCEI U.S. Climate Normals 1991–2020 (annual/seasonal) (opens in a new tab) (Sep 27) · USA National Phenology Network, Spring Index 1991–2020 averages (opens in a new tab) (Sep 27) · USA National Phenology Network, colored leaves observations (opens in a new tab) (Sep 28)