Your nature year
Lebanon, Pennsylvaniathrough the year
When do frost, green-up and fall color come to Lebanon?
For a day trip, Catoctin Mountain is 72 miles off; its fall foliage is usually well under way by late October (statewide). For wildflowers, the nearest is Catoctin Mountain (72 mi, Apr 1–May 31 (local timing)). Frost usually lets go around Apr 20 and comes back around Oct 25, according to the nearest NOAA station, Lebanon 2 W: roughly 188 days without it. Spring takes about 4 weeks to go from leaf to bloom. Leaves usually come out around Mar 30 and the first flowers around Apr 28. We follow 26 places within 150 miles of Lebanon; the nearest lies 72 miles to the southwest. Statewide, Pennsylvania's fall color is usually well under way by late October.
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)
Lebanon's year at a glance
- Frost possible
- Frost-free, ~Apr 20 to ~Oct 25
- First leaf ~Mar 30
- First bloom ~Apr 28
- Fall color under way ~Oct 25 (PA)
- Today
Near Lebanon right now
- Fall color is usually well under way by late October in PennsylvaniaStatewide · USA-NPN volunteer observations, 2020–2025 · not a forecast~4 weeks
- First fall frost usually around Oct 25 · last spring frost around Apr 20NOAA 1991–2020 normals, Lebanon 2 W (2.1 mi, 50% dates)~4 weeks
- Kenilworth Aquatic Gardens · 103 mi · Local timing: May 21–Sep 30Wildflowers · in its window now
- Fall foliage · Catoctin Mountain · 72 miStatewide: usually well under way by late October~4 weeks
Lebanon's nature year
- Cherry blossoms · Baltimore (Fort McHenry)Mar–Apr
- Spring green-upMar
- Wildflowers · Catoctin MountainApr–May
- Last spring frostApr
- Tulips · Washington, DCApr
- Fall color (PA)Oct
- First fall frostOct
Nearby, season by season
Cherry blossoms
- Baltimore (Fort McHenry) · 74 miusually Mar 24–Apr 7~6 months
- US National Arboretum · 103 miusually Mar 1–Apr 30~5 months
- Washington, DC · 106 miusually Mar 25–Apr 7~6 months
Fall foliage
- Catoctin Mountain · 72 miStatewide: usually well under way by late October~4 weeks
- Bald Eagle State Park · 80 miStatewide: usually well under way by late October~3 weeks
- Delaware Water Gap · 80 miStatewide: usually well under way by late October~3 weeks
Tulips
- Washington, DC · 106 miLocal timing: Apr 1–20~6 months
Wildflowers
- Catoctin Mountain · 72 miLocal timing: Apr 1–May 31~6 months
- Bombay Hook · 90 miLocal timing: Apr 1–May 31~6 months
- Kenilworth Aquatic Gardens · 103 miLocal timing: May 21–Sep 30
Snow in Lebanon
Snow usually becomes possible around Jan 12 (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 Lebanon 2 W (2.1 mi away): 24 inches of snow in an average year, about 7.3 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 20
Average (50% date)
First fall frost
Oct 25
About 188 days without frost between
Spring green-up
Mar 30
First bloom around Apr 28
Frost: NOAA 1991–2020 climate normals at Lebanon 2 W (2.1 mi from Lebanon), 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 Lebanon?
On average around Oct 25, and the last spring frost around Apr 20: about 188 days without frost between. These are NOAA's 1991–2020 normals at Lebanon 2 W, 2.1 miles away (the day a 32 °F night is as likely as not).
When does spring green-up reach Lebanon?
The USA-NPN Spring Index puts first leaf around Mar 30 and first bloom around Apr 28, on average for 1991–2020 at the town.
Where can I see cherry blossoms near Lebanon?
Baltimore (Fort McHenry), 74 miles (usually Mar 24–Apr 7); US National Arboretum, 103 miles (usually Mar 1–Apr 30); Washington, DC, 106 miles (usually Mar 25–Apr 7). Distances are straight-line.
Where can I see fall foliage near Lebanon?
Catoctin Mountain, 72 miles (statewide: usually well under way by late October); Bald Eagle State Park, 80 miles (statewide: usually well under way by late October); Delaware Water Gap, 80 miles (statewide: usually well under way by late October). Distances are straight-line.
When does it start snowing in Lebanon?
Snow usually becomes possible around Jan 12: our calculation from NOAA's daily snow chances: the first day the chance of 0.1" or more of snow reaches 10%, at Lebanon 2 W. An average year brings 24 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)