Frost dates for Neshaminy Falls, PA
At Neshaminy Falls, the median last spring frost (32°F) is Apr 21 and the median first fall frost is Oct 25, for a typical growing season of 185 days. For a 90% chance that the last frost has passed, wait until May 7. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 21Last spring frost (median)50% chance of 32°F after this date
- May 7Safer planting date10% chance of 32°F after this date
- Oct 25First fall frost (median)50% chance of 32°F by this date
- 185 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 19 | May 3 | May 22 |
| 32°F | Apr 6 | Apr 21 | May 7 |
| 28°F | Mar 24 | Apr 8 | Apr 21 |
| 24°F | Mar 12 | Mar 29 | Apr 12 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 1 | Oct 13 | Oct 29 |
| 32°F | Oct 11 | Oct 25 | Nov 5 |
| 28°F | Oct 20 | Nov 3 | Nov 16 |
| 24°F | Oct 30 | Nov 14 | Dec 1 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 139 days | 162 days | 183 days |
| 32°F | 162 days | 185 days | 205 days |
| 28°F | 189 days | 209 days | 229 days |
| 24°F | 210 days | 232 days | 254 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 19053 | 7a | 0 to 5°F | 2 km |
| 19047 | 7a | 0 to 5°F | 5 km |
| 19020 | 7b | 5 to 10°F | 6 km |
| 19056 | 7a | 0 to 5°F | 6 km |
| 18966 | 7a | 0 to 5°F | 7 km |
| 19057 | 7b | 5 to 10°F | 8 km |
| 19021 | 7b | 5 to 10°F | 8 km |
| 19007 | 7b | 5 to 10°F | 9 km |
| 18954 | 7a | 0 to 5°F | 9 km |
| 19055 | 7b | 5 to 10°F | 10 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00366194, at 40.1483, -74.9530, elevation 12 m (40 ft).
- Data quality: Representative (10+ years), 25 years of freeze data.
- Average days per year at or below 32°F: 120.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Philadelphia NE Airport (9 km)
- Willow Grove NAS (18 km)
- Doylestown Airport (25 km)
- Phila Franklin Inst (28 km)
- Norristown (33 km)
- Sellersville (38 km)
- Philadelphia Intl Airport (39 km)
- Graterford 1 E (41 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.