USDA Hardiness Zone 10b
Frost Dates for 34997 — Stuart, Florida
NOAA 1991–2020 normals from Port Salerno 5W, FL (12 ft), 4 miles southwest.
Updated
Frost is not a yearly event in Stuart: a night at or below 32°F came in 33% of the winters of 1991–2020 at Port Salerno 5W, FL, and a 36°F night, cold enough for frost on exposed leaves, in 71%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 33%
- Winters with 36°F
- 71%
- Coldest month low
- 54°F
- Hardiness zone
- 10b
32°F or below, 1991–2020
frost possible on leaves
average, January
35 to 40°F (1.7 to 4.4°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 0%
- Snow per year
- 0"
median, 1991–2020
median, 1991–2020
0 of 19 observed
NOAA normal
Frost risk by date in Stuart
At Port Salerno 5W, FL, 4 miles southwest of Stuart, 33% of the winters of 1991–2020 had at least one night at or below 32°F, 8% reached 28°F. Nights of 36°F, enough for frost on exposed leaves, are more common (71% of winters) and, when they come, fall between about January 12 and February 3. January is the month most likely to bring one: a 22% chance in a given year. 56 of the 158 other Florida stations behind this site's ZIP pages freeze in fewer than half of winters too.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F71% of yrs | Jan 3 | Jan 12 | Jan 22 | Jan 31 | Feb 3 | Feb 8 | Feb 15 | Feb 23 | Mar 3 |
| 32°F33% of yrs | too rare for a date | ||||||||
| 28°F8% of yrs | too rare for a date | ||||||||
| 24°F0% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F71% of yrs | Dec 22 | Dec 28 | Jan 2 | Jan 7 | Jan 12 | Jan 20 | Jan 28 | Feb 3 | Feb 13 |
| 32°F33% of yrs | too rare for a date | ||||||||
| 28°F8% of yrs | too rare for a date | ||||||||
| 24°F0% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Port Salerno 5W, FL, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 34997 →Compare Stuart with another place →
Weather by month in Stuart
August is the warmest month at Port Salerno 5W, FL, averaging 91°F by day and 74°F at night; January is the coldest at 74°F and 54°F. From February to December the chance of a 32°F night stays under 10% each month.
Warmth for growing adds up to 8,678 growing degree days a year (base 50°F), more than at 64% of the 158 Florida stations. 44% of them (3,826) have built up by the end of June, and August adds the most, 1,003. Precipitation totals 64.3 inches a year, most in June (9.6") and least in February (2.3"); May to September bring 63% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 74 | 54 | 3.2 | 22% | 1 | 430 |
| Feb | 76 | 55 | 2.3 | 10% | <1 | 436 |
| Mar | 79 | 58 | 4.0 | 2% | 0 | 563 |
| Apr | 83 | 62 | 2.9 | 0% | 0 | 671 |
| May | 86 | 67 | 5.7 | 0% | 0 | 822 |
| Jun | 89 | 72 | 9.6 | 0% | 0 | 906 |
| Jul | 90 | 73 | 7.0 | 0% | 0 | 980 |
| Aug | 91 | 74 | 9.0 | 0% | 0 | 1003 |
| Sep | 89 | 72 | 9.2 | 0% | 0 | 914 |
| Oct | 85 | 68 | 5.1 | 0% | 0 | 831 |
| Nov | 79 | 62 | 3.4 | 0% | 0 | 618 |
| Dec | 76 | 57 | 2.9 | 6% | 1 | 507 |
Monthly normals 1991–2020 at Port Salerno 5W, FL (12 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Stuart, FL, 4 miles north of Stuart, has a 32°F night in 14% of winters against 33% here, and a coolest-month low 2°F warmer (56°F).
When it snows in Stuart, Florida
Measurable snow is rare here: only 0 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Stuart, FL, 4 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 34997 is 4 miles from Port Salerno 5W, FL, which stands at 12 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 34997 in zone 10b, the band where the coldest night of the year averaged 35 to 40°F (1.7 to 4.4°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.