Frost dates for Mountain Lake, FL
At Mountain Lake, the median last spring frost (32°F) is Feb 4 and the median first fall frost is Jan 4, for a typical growing season of 332 days. For a 90% chance that the last frost has passed, wait until Mar 11. Nearby ZIP codes are in USDA hardiness zones 9b to 10a.
- Feb 4Last spring frost (median)50% chance of 32°F after this date
- Mar 11Safer planting date10% chance of 32°F after this date
- Jan 4First fall frost (median)50% chance of 32°F by this date
- 332 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 22 | Feb 25 | Mar 20 |
| 32°F | Jan 1 | Feb 4 | Mar 11 |
| 28°F | Dec 27 | Jan 20 | Feb 21 |
| 24°F | Dec 21 | Jan 6 | Jan 24 |
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 29 | Dec 21 | Jan 17 |
| 32°F | Dec 8 | Jan 4 | Feb 10 |
| 28°F | Dec 17 | Jan 8 | Feb 14 |
| 24°F | Dec 17 | Jan 3 | Jan 23 |
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 | 266 days | 301 days | 334 days |
| 32°F | 296 days | 332 days | 365 days |
| 28°F | 322 days | 365 days | 365 days |
| 24°F | 361 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 99% |
| 32°F | 82% |
| 28°F | 43% |
| 24°F | 11% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 33853 | 9b | 25 to 30°F | 4 km |
| 33877 | 10a | 30 to 35°F | 6 km |
| 33859 | 10a | 30 to 35°F | 7 km |
| 33838 | 10a | 30 to 35°F | 9 km |
| 33827 | 10a | 30 to 35°F | 16 km |
| 33854 | 9b | 25 to 30°F | 21 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 USC00085973, at 27.9378, -81.5992, elevation 38 m (125 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 4.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Winter Haven (16 km)
- Winter Haven Gilbert Airport (21 km)
- Bartow 1se (24 km)
- Avon Park 2 W (39 km)
- Lakeland 2 (41 km)
- Kissimmee 2 (41 km)
- Wauchula (48 km)
- Plant City (54 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.