Frost dates for Bronx, NY
At Bronx, the median last spring frost (32°F) is Apr 1 and the median first fall frost is Nov 16, for a typical growing season of 230 days. For a 90% chance that the last frost has passed, wait until Apr 12. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 1Last spring frost (median)50% chance of 32°F after this date
- Apr 12Safer planting date10% chance of 32°F after this date
- Nov 16First fall frost (median)50% chance of 32°F by this date
- 230 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 1 | Apr 11 | Apr 26 |
| 32°F | Mar 19 | Apr 1 | Apr 12 |
| 28°F | Mar 8 | Mar 23 | Apr 3 |
| 24°F | Feb 23 | Mar 12 | Mar 26 |
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 21 | Nov 4 | Nov 20 |
| 32°F | Nov 2 | Nov 16 | Dec 4 |
| 28°F | Nov 13 | Nov 30 | Dec 17 |
| 24°F | Nov 24 | Dec 9 | Dec 29 |
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 | 186 days | 206 days | 225 days |
| 32°F | 211 days | 230 days | 250 days |
| 28°F | 231 days | 252 days | 274 days |
| 24°F | 251 days | 273 days | 297 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 |
|---|---|---|---|
| 10462 | 7b | 5 to 10°F | 1 km |
| 10461 | 7b | 5 to 10°F | 1 km |
| 10472 | 7b | 5 to 10°F | 2 km |
| 10473 | 7b | 5 to 10°F | 2 km |
| 10465 | 7b | 5 to 10°F | 3 km |
| 10460 | 7b | 5 to 10°F | 3 km |
| 10469 | 7b | 5 to 10°F | 4 km |
| 10459 | 7b | 5 to 10°F | 4 km |
| 10457 | 7b | 5 to 10°F | 4 km |
| 10458 | 7b | 5 to 10°F | 4 km |
| 10467 | 7b | 5 to 10°F | 5 km |
| 10475 | 7b | 5 to 10°F | 5 km |
| 10456 | 7b | 5 to 10°F | 5 km |
| 10468 | 7b | 5 to 10°F | 6 km |
| 10453 | 7b | 5 to 10°F | 6 km |
| 10464 | 7b | 5 to 10°F | 6 km |
| 10466 | 7b | 5 to 10°F | 6 km |
| 10470 | 7b | 5 to 10°F | 6 km |
| 10452 | 7b | 5 to 10°F | 6 km |
| 10463 | 7b | 5 to 10°F | 7 km |
| 10034 | 7b | 5 to 10°F | 7 km |
| 10040 | 7b | 5 to 10°F | 7 km |
| 10033 | 7b | 5 to 10°F | 7 km |
| 10550 | 7b | 5 to 10°F | 8 km |
| 10803 | 7b | 5 to 10°F | 8 km |
| 11359 | 7b | 5 to 10°F | 8 km |
| 10553 | 7b | 5 to 10°F | 8 km |
| 10471 | 7b | 5 to 10°F | 9 km |
| 11024 | 7b | 5 to 10°F | 9 km |
| 10704 | 7b | 5 to 10°F | 9 km |
| 10805 | 7b | 5 to 10°F | 9 km |
| 07632 | 7b | 5 to 10°F | 10 km |
| 10705 | 7b | 5 to 10°F | 10 km |
| 10801 | 7b | 5 to 10°F | 10 km |
| 11023 | 7b | 5 to 10°F | 11 km |
| 11363 | 7b | 5 to 10°F | 11 km |
| 11050 | 7b | 5 to 10°F | 13 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 USC00300961, at 40.8369, -73.8494, elevation 12 m (39 ft).
- Data quality: Representative (10+ years), 12 years of freeze data.
- Average days per year at or below 32°F: 67.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- New York Laguardia Airport (7 km)
- New York Cntrl Pk Twr (12 km)
- Dobbs Ferry-Ardsley (19 km)
- Mineola (23 km)
- New York Jfk Intl Airport (23 km)
- Westchester Co Airport (28 km)
- Ny Ave V Brooklyn (29 km)
- Oceanside (29 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.