USDA Hardiness Zone 10a
Frost Dates for 34946 — Fort Pierce, Florida
NOAA 1991–2020 normals from Fort Pierce St Lucie Co International Airport, FL (24 ft), 2 miles northwest.
Updated
Frost is not a yearly event in Fort Pierce: a night at or below 32°F came in 49% of the winters of 1991–2020 at Fort Pierce St Lucie Co International Airport, FL, and a 36°F night, cold enough for frost on exposed leaves, in 87%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 49%
- Winters with 36°F
- 87%
- Coldest month low
- 51°F
- Hardiness zone
- 10a
32°F or below, 1991–2020
frost possible on leaves
average, January
30 to 35°F (-1.1 to 1.7°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 20 observed
NOAA normal
Frost risk by date in Fort Pierce
At Fort Pierce St Lucie Co International Airport, FL, 2 miles northwest of Fort Pierce, 49% of the winters of 1991–2020 had at least one night at or below 32°F, 17% reached 28°F. Nights of 36°F, enough for frost on exposed leaves, are more common (87% of winters) and, when they come, fall between about January 6 and February 3. January is the month most likely to bring one: a 36% 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°F87% of yrs | Jan 6 | Jan 17 | Jan 23 | Jan 29 | Feb 3 | Feb 9 | Feb 17 | Feb 27 | Mar 8 |
| 32°F49% of yrs | too rare for a date | ||||||||
| 28°F17% of yrs | too rare for a date | ||||||||
| 24°F3% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F87% of yrs | Dec 6 | Dec 19 | Dec 28 | Jan 1 | Jan 6 | Jan 12 | Jan 18 | Jan 26 | Feb 5 |
| 32°F49% of yrs | too rare for a date | ||||||||
| 28°F17% of yrs | too rare for a date | ||||||||
| 24°F3% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Fort Pierce St Lucie Co International Airport, 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 34946 →Compare Fort Pierce with another place →
Weather by month in Fort Pierce
August is the warmest month at Fort Pierce St Lucie Co International Airport, FL, averaging 90°F by day and 73°F at night; January is the coldest at 73°F and 51°F. From March to December the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 11% of years.
Warmth for growing adds up to 8,465 growing degree days a year (base 50°F), more than at 58% of the 158 Florida stations. 44% of them (3,701) have built up by the end of June, and August adds the most, 978. Precipitation totals 51.2 inches a year, most in August (6.9") and least in February (2.2"); May to September bring 58% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 73 | 51 | 2.8 | 36% | 1 | 391 |
| Feb | 76 | 54 | 2.2 | 11% | <1 | 416 |
| Mar | 78 | 57 | 2.9 | 2% | 0 | 540 |
| Apr | 82 | 61 | 3.0 | 0% | 0 | 645 |
| May | 86 | 67 | 3.9 | 0% | 0 | 812 |
| Jun | 89 | 71 | 6.7 | 0% | 0 | 897 |
| Jul | 90 | 73 | 5.9 | 0% | 0 | 975 |
| Aug | 90 | 73 | 6.9 | 0% | 0 | 978 |
| Sep | 88 | 73 | 6.3 | 0% | 0 | 911 |
| Oct | 84 | 69 | 5.3 | 0% | 0 | 817 |
| Nov | 79 | 61 | 3.0 | 1% | 0 | 597 |
| Dec | 75 | 56 | 2.3 | 8% | <1 | 487 |
Monthly normals 1991–2020 at Fort Pierce St Lucie Co International Airport, FL (24 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, Fort Pierce, FL, 3 miles south of Fort Pierce, has a 32°F night in 33% of winters against 49% here, and a coolest-month low 2°F warmer (53°F).
When it snows in Fort Pierce, Florida
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Fort Pierce, FL, 3 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 34946 is 2 miles from Fort Pierce St Lucie Co International Airport, FL, which stands at 24 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 34951 (Fort Pierce). The 2023 USDA Plant Hardiness Zone Map lists ZIP 34946 in zone 10a, the band where the coldest night of the year averaged 30 to 35°F (-1.1 to 1.7°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.