Frost dates for Brooksville Hernando Co Airport, FL
At Brooksville Hernando Co Airport, the median last spring frost (32°F) is Mar 1 and the median first fall frost is Dec 5, for a typical growing season of 281 days. For a 90% chance that the last frost has passed, wait until Mar 27. Nearby ZIP codes are in USDA hardiness zone 9b.
- Mar 1Last spring frost (median)50% chance of 32°F after this date
- Mar 27Safer planting date10% chance of 32°F after this date
- Dec 5First fall frost (median)50% chance of 32°F by this date
- 281 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 | Feb 18 | Mar 17 | Apr 9 |
| 32°F | Jan 30 | Mar 1 | Mar 27 |
| 28°F | Jan 8 | Feb 7 | Mar 12 |
| 24°F | Dec 30 | Jan 23 | Feb 21 |
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 | Nov 1 | Nov 21 | Dec 13 |
| 32°F | Nov 11 | Dec 5 | Jan 6 |
| 28°F | Nov 27 | Dec 29 | Feb 2 |
| 24°F | Dec 4 | Jan 7 | Feb 5 |
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 | 220 days | 250 days | 284 days |
| 32°F | 244 days | 281 days | 317 days |
| 28°F | 277 days | 315 days | 359 days |
| 24°F | 311 days | 353 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 93% |
| 24°F | 64% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 34604 | 9b | 25 to 30°F | 2 km |
| 34609 | 9b | 25 to 30°F | 5 km |
| 34610 | 9b | 25 to 30°F | 13 km |
| 34637 | 9b | 25 to 30°F | 18 km |
| 34638 | 9b | 25 to 30°F | 23 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 USW00012818, at 28.4736, -82.4544, elevation 24 m (77 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 14.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Weeki Wachee (13 km)
- Brooksville Chin Hill (18 km)
- Saint Leo (24 km)
- Inverness 3 SE (39 km)
- Bushnell 1 E (42 km)
- Tarpon Springs Sewage Plant (46 km)
- Tampa Intl Airport (58 km)
- Plant City (59 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.