Your nature year
Trenton, New Jerseythrough the year
Also for New Brunswick, NJ, Princeton, NJ: the same nearby places.
When do frost, green-up and fall color come to Trenton?
Within 150 miles we follow 24 places, out to US National Arboretum 149 miles to the southwest. The closest place we follow is Brooklyn Botanic Garden, 52 miles away, for cherry blossoms, from late March or early April to mid-May (local timing).
Forsythe Refuge (55 mi) is the pick for fall & winter wildlife, December through February (local timing). Frost usually lets go around Apr 10 and comes back around Nov 1, according to NOAA's Trenton-Mercer Airport station, 4.6 miles away: roughly 205 days without it. Leaves usually come out around Mar 23 and the first flowers around Apr 24.
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)
Near Trenton right now
- First fall frost usually around Nov 1 · last spring frost around Apr 10NOAA 1991–2020 normals, Trenton-Mercer Airport (4.6 mi, 50% dates)~4 weeks
- Delaware Water Gap · 56 mi · Usually: sometime in OctoberFall foliage · in its window nowIn season
- Blackwater Refuge · 143 mi · Usually: late September and early OctoberWildlife by season · in its window nowIn season
- Spring migration · Prime Hook Refuge · 100 miLocal timing: March~5 months
Your guide around Trenton
- Spring
- Fall
- Winter
Places on this map, as a list
Nearby, season by season
Cherry blossoms
- Brooklyn Botanic Garden · 52 miLocal timing: from late March or early April to mid-May~6 months
- Baltimore (Fort McHenry) · 117 miusually between the last week of March and the first week of April~6 months
- US National Arboretum · 149 miLocal timing: early March to late April, a few groups of trees at a time~5 months
Fall foliage
- Delaware Water Gap · 56 miUsually: sometime in OctoberIn season
- Cherry Valley Refuge · 56 miusually late October~3 weeks
- New York City · 57 miStatewide: usually well under way by mid-October~2 weeks
Spring migration
- Prime Hook Refuge · 100 miLocal timing: March~5 months
Wildflowers
- Bombay Hook · 76 miLocal timing: April and May (full bloom in May)~6 months
- Catoctin Mountain · 146 miLocal timing: from early April through the summer~6 months
- Kenilworth Aquatic Gardens · 147 miLocal timing: late May through September~8 months
Wildlife by season
- Target Rock Refuge · 85 miLocal timing: in the spring and summer months (March – September)~5 months
- Blackwater Refuge · 143 miUsually: late September and early OctoberIn season
Fall & winter wildlife
- Forsythe Refuge · 55 miLocal timing: December through February~2 months
- Jamaica Bay Wildlife Refuge · 56 miLocal timing: fall, winter and early springIn season
- Bombay Hook · 76 miLocal timing: November (the peak) and December~4 weeks
Trenton's nature year
- Wildlife by season · Target Rock RefugeMar–Sep
- Cherry blossoms · Brooklyn Botanic GardenMar–May
- Mar: Spring green-upMar
- Mar: Spring migration · Prime Hook RefugeMar
- Wildflowers · Bombay HookApr–May
- Apr: Last spring frostApr
- Oct: Fall foliage · Delaware Water GapNowOct
- Nov: First fall frostNov
- Fall & winter wildlife · Forsythe RefugeDec–Feb
Trenton's year at a glance
- Frost possible
- Frost-free, ~Apr 10 to ~Nov 1
- First leaf ~Mar 23
- First bloom ~Apr 24
- Today
Frost and green-up
Last spring frost
Apr 10
Average (50% date)
First fall frost
Nov 1
About 205 days without frost between
Spring green-up
Mar 23
First bloom around Apr 24
Frost: NOAA 1991–2020 climate normals at Trenton-Mercer Airport (4.6 mi from Trenton), the day a 32 °F night is as likely as not. Green-up: the USA-NPN Spring Index, 1991–2020 average at the town.
Snow in Trenton
Snow usually becomes possible around Jan 1 (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 Trenton-Mercer Airport (4.6 mi away): 27 inches of snow in an average year, about 6.7 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.
Questions people ask
When is the first frost in Trenton?
On average around Nov 1, and the last spring frost around Apr 10: about 205 days without frost between. These are NOAA's 1991–2020 normals at Trenton-Mercer Airport, 4.6 miles away (the day a 32 °F night is as likely as not).
When does spring green-up reach Trenton?
The USA-NPN Spring Index puts first leaf around Mar 23 and first bloom around Apr 24, on average for 1991–2020 at the town.
Where can I see cherry blossoms near Trenton?
Brooklyn Botanic Garden, 52 miles (local timing: from late March or early April to mid-May); Baltimore (Fort McHenry), 117 miles (usually between the last week of March and the first week of April); US National Arboretum, 149 miles (local timing: early March to late April, a few groups of trees at a time). Distances are straight-line.
Where can I see fall foliage near Trenton?
Delaware Water Gap, 56 miles (usually: sometime in October); Cherry Valley Refuge, 56 miles (usually late October); New York City, 57 miles (statewide: usually well under way by mid-October). Distances are straight-line.
When does it start snowing in Trenton?
Snow usually becomes possible around Jan 1: our calculation from NOAA's daily snow chances: the first day the chance of 0.1" or more of snow reaches 10%, at Trenton-Mercer Airport. An average year brings 27 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)