Frost dates for St. Petersburg Intl Airport, FL
At St. Petersburg Intl Airport, the median last spring frost (32°F) is Jan 17 and the median first fall frost is Jan 14, for a typical growing season of 365 days. For a 90% chance that the last frost has passed, wait until Feb 6. Nearby ZIP codes are in USDA hardiness zones 10a to 10b.
- Jan 17Last spring frost (median)50% chance of 32°F after this date
- Feb 6Safer planting date10% chance of 32°F after this date
- Jan 14First fall frost (median)50% chance of 32°F by this date
- 365 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 | Jan 1 | Jan 23 | Feb 17 |
| 32°F | Jan 1 | Jan 17 | Feb 6 |
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 | Dec 22 | Jan 12 | Feb 6 |
| 32°F | Dec 27 | Jan 14 | Feb 4 |
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 | 318 days | 353 days | 365 days |
| 32°F | 345 days | 365 days | 365 days |
| 28°F | 365 days | 365 days | 365 days |
| 24°F | 365 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 63% |
| 32°F | 23% |
| 28°F | 3% |
| 24°F | 0% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 33762 | 10a | 30 to 35°F | 1 km |
| 33760 | 10a | 30 to 35°F | 3 km |
| 33716 | 10a | 30 to 35°F | 5 km |
| 33764 | 10a | 30 to 35°F | 6 km |
| 33782 | 10a | 30 to 35°F | 6 km |
| 33771 | 10a | 30 to 35°F | 7 km |
| 33773 | 10a | 30 to 35°F | 7 km |
| 33759 | 10a | 30 to 35°F | 8 km |
| 33781 | 10a | 30 to 35°F | 8 km |
| 33702 | 10b | 35 to 40°F | 9 km |
| 33765 | 10a | 30 to 35°F | 9 km |
| 33777 | 10a | 30 to 35°F | 10 km |
| 34695 | 10a | 30 to 35°F | 11 km |
| 33756 | 10a | 30 to 35°F | 11 km |
| 33778 | 10a | 30 to 35°F | 11 km |
| 33709 | 10b | 35 to 40°F | 11 km |
| 33770 | 10a | 30 to 35°F | 11 km |
| 33763 | 10a | 30 to 35°F | 12 km |
| 33755 | 10a | 30 to 35°F | 12 km |
| 33772 | 10b | 35 to 40°F | 13 km |
| 33774 | 10b | 35 to 40°F | 14 km |
| 33744 | 10b | 35 to 40°F | 14 km |
| 33786 | 10b | 35 to 40°F | 15 km |
| 33708 | 10b | 35 to 40°F | 15 km |
| 33776 | 10b | 35 to 40°F | 15 km |
| 33767 | 10b | 35 to 40°F | 15 km |
| 33785 | 10b | 35 to 40°F | 16 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 USW00012873, at 27.9106, -82.6875, elevation 3 m (11 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 0.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tampa Intl Airport (16 km)
- St. Petersburg (18 km)
- St. Petersburg Airport (18 km)
- Tarpon Springs Sewage Plant (28 km)
- Tampa Bay Area WFO (36 km)
- Parrish (47 km)
- Bradenton 5 ESE (55 km)
- Plant City (55 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.