USDA Hardiness Zone 9b
Frost Dates for 32086 — St Augustine, Florida
NOAA 1991–2020 normals from St Augustine Lighthouse, FL (12 ft), 5 miles north.
Updated
A freeze (32°F) reaches St Augustine in 79% of winters. When it does, the first freeze of winter comes around January 5 and the last freeze of winter around February 1; after March 3 the chance of another is under 8%.
- Last freeze
- February 1
- First freeze
- January 5
- Winters with a freeze
- 79%
- Hardiness zone
- 9b
50%, in freezing years
50%, in freezing years
32°F or below, 1991–2020
25 to 30°F (-3.9 to -1.1°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 St Augustine
In the 79% of winters that bring a 32°F night, half of winters at St Augustine Lighthouse, FL see their last 32°F night by February 1; only one in ten is past it by December 31, and one in ten still has one after March 3. Counting the winters with no freeze at all, the risk of a 32°F night after March 3 is under 8% and after February 1 40%. The 30 days between the even-odds date and the one-in-ten date is wider than at 82% of the 101 Florida stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.
In fall the first 32°F night comes by January 5 in half of years, as early as December 7 one year in ten, and holds off past February 10 one year in ten. A hard freeze of 28°F is less common: it came in 41% of winters. On average 5 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 16 days longer, to about February 17, and return around December 20. A 24°F night is unusual: 12% of winters had one.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F98% of yrs | Jan 14 | Jan 30 | Feb 4 | Feb 10 | Feb 17 | Feb 22 | Feb 28 | Mar 6 | Mar 13 |
| 32°F79% of yrs | Dec 31 | Jan 9 | Jan 17 | Jan 27 | Feb 1 | Feb 7 | Feb 15 | Feb 24 | Mar 3 |
| 28°F41% of yrs | too rare for a date | ||||||||
| 24°F12% of yrs | too rare for a date | ||||||||
| 20°F1% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F98% of yrs | Nov 27 | Dec 3 | Dec 7 | Dec 12 | Dec 20 | Dec 27 | Jan 3 | Jan 9 | Jan 20 |
| 32°F79% of yrs | Dec 7 | Dec 17 | Dec 26 | Jan 1 | Jan 5 | Jan 10 | Jan 17 | Jan 27 | Feb 10 |
| 28°F41% of yrs | too rare for a date | ||||||||
| 24°F12% of yrs | too rare for a date | ||||||||
| 20°F1% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at St Augustine Lighthouse, 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 32086 →Compare St Augustine with another place →
Weather by month in St Augustine
July is the warmest month at St Augustine Lighthouse, FL, averaging 91°F by day and 74°F at night; January is the coldest at 68°F and 48°F. From April to November the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 34% of years and March still brings one in 10% of years.
Warmth for growing adds up to 7,809 growing degree days a year (base 50°F), fewer than at 63% of the 158 Florida stations. 43% of them (3,338) have built up by the end of June, and July adds the most, 1,004. Precipitation totals 50.7 inches a year, most in August (7.2") and least in November (2.3"); May to September bring 58% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 68 | 48 | 2.7 | 52% | 2 | 264 |
| Feb | 70 | 50 | 2.7 | 34% | 1 | 288 |
| Mar | 74 | 55 | 3.4 | 10% | <1 | 453 |
| Apr | 80 | 61 | 2.9 | 0% | 0 | 606 |
| May | 85 | 67 | 3.7 | 0% | 0 | 814 |
| Jun | 89 | 72 | 6.3 | 0% | 0 | 914 |
| Jul | 91 | 74 | 4.9 | 0% | 0 | 1004 |
| Aug | 90 | 74 | 7.2 | 0% | 0 | 994 |
| Sep | 87 | 73 | 7.2 | 0% | 0 | 907 |
| Oct | 82 | 67 | 4.4 | 0% | 0 | 749 |
| Nov | 75 | 58 | 2.3 | 2% | <1 | 488 |
| Dec | 69 | 51 | 3.0 | 31% | 1 | 329 |
Monthly normals 1991–2020 at St Augustine Lighthouse, 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, Hastings 4NE, FL, 10 miles west of St Augustine, has a last frost 13 days later (February 14), a first frost 6 days earlier (December 30), a season 26 days shorter.
When it snows in St Augustine, Florida
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at St Augustine Lighthouse, FL, 5.3 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 32086 is 5 miles from St Augustine Lighthouse, FL, which stands at 12 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 32084 (St Augustine). The 2023 USDA Plant Hardiness Zone Map lists ZIP 32086 in zone 9b, the band where the coldest night of the year averaged 25 to 30°F (-3.9 to -1.1°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.