Your nature year
Port Huron, Michiganthrough the year
When do frost, green-up and fall color come to Port Huron?
Frost usually lets go around Apr 19 and comes back around Nov 3, according to NOAA's Port Huron station, 1.5 miles away: roughly 198 days without it. The town is about 596 feet above sea level.
Spring green-up reaches town around Apr 13, with first blooms around May 15. Spring takes about 5 weeks to go from leaf to bloom. Within 150 miles we follow 3 places, out to Cuyahoga Valley 129 miles to the south. The closest place we follow is Ottawa Refuge, 104 miles away, for spring migration, late April to mid-May (local timing). Au Sable River (108 mi) is the pick for fall foliage, Oct 1–31 (local timing).
Updated Sep 27. 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)
Port Huron's year at a glance
- Frost possible
- Frost-free, ~Apr 19 to ~Nov 3
- First leaf ~Apr 13
- First bloom ~May 15
- Today
Near Port Huron right now
- First fall frost usually around Nov 3 · last spring frost around Apr 19NOAA 1991–2020 normals, Port Huron (1.5 mi, 50% dates)~5 weeks
- Fall foliage · Au Sable River · 108 miLocal timing: Oct 1–31~2 days
Port Huron's nature year
- Wildflowers · Cuyahoga ValleyMar–May
- Spring migration · Ottawa RefugeApr–May
- Apr: Spring green-upApr
- Apr: Last spring frostApr
- Oct: Fall foliage · Au Sable RiverOct
- Nov: First fall frostNov
Nearby, season by season
Fall foliage
- Au Sable River · 108 miLocal timing: Oct 1–31~2 days
- Cuyahoga Valley · 129 miusually Oct 15–21~2 weeks
Spring migration
- Ottawa Refuge · 104 miLocal timing: late April to mid-May~7 months
Wildflowers
- Cuyahoga Valley · 129 miLocal timing: Mar 21–May 15~6 months
Snow in Port Huron
Snow usually becomes possible around Dec 6 (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 Port Huron (1.5 mi away): 36 inches of snow in an average year, about 12 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
Apr 19
Average (50% date)
First fall frost
Nov 3
About 198 days without frost between
Spring green-up
Apr 13
First bloom around May 15
Frost: NOAA 1991–2020 climate normals at Port Huron (1.5 mi from Port Huron), 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 Port Huron?
On average around Nov 3, and the last spring frost around Apr 19: about 198 days without frost between. These are NOAA's 1991–2020 normals at Port Huron, 1.5 miles away (the day a 32 °F night is as likely as not).
When does spring green-up reach Port Huron?
The USA-NPN Spring Index puts first leaf around Apr 13 and first bloom around May 15, on average for 1991–2020 at the town.
Where can I see fall foliage near Port Huron?
Au Sable River, 108 miles (local timing: Oct 1–31); Cuyahoga Valley, 129 miles (usually Oct 15–21). Distances are straight-line.
Where can I see spring migration near Port Huron?
Ottawa Refuge, 104 miles (local timing: late April to mid-May). Distances are straight-line.
When does it start snowing in Port Huron?
Snow usually becomes possible around Dec 6: our calculation from NOAA's daily snow chances: the first day the chance of 0.1" or more of snow reaches 10%, at Port Huron. An average year brings 36 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)