USDA Hardiness Zone 9a
Frost Dates for 32068 — Middleburg, Florida
NOAA 1991–2020 normals from Jacksonville NAS, FL (20 ft), 17 miles northeast.
Updated
A freeze (32°F) reaches Middleburg in 80% 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
- 80%
- Hardiness zone
- 9a
50%, in freezing years
50%, in freezing years
32°F or below, 1991–2020
20 to 25°F (-6.7 to -3.9°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 Middleburg
In the 80% of winters that bring a 32°F night, half of winters at Jacksonville NAS, 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 3 one year in ten, and holds off past February 6 one year in ten. A hard freeze of 28°F is less common: it came in 43% of winters. On average 4 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 17 days longer, to about February 18, and return around December 17. A 24°F night is unusual: 13% of winters had one.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F99% of yrs | Jan 20 | Jan 31 | Feb 6 | Feb 12 | Feb 18 | Feb 25 | Mar 2 | Mar 7 | Mar 15 |
| 32°F80% of yrs | Dec 31 | Jan 11 | Jan 19 | Jan 26 | Feb 1 | Feb 7 | Feb 15 | Feb 24 | Mar 3 |
| 28°F43% of yrs | too rare for a date | ||||||||
| 24°F13% of yrs | too rare for a date | ||||||||
| 20°F2% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F99% of yrs | Nov 20 | Nov 29 | Dec 3 | Dec 8 | Dec 17 | Dec 26 | Jan 2 | Jan 10 | Jan 22 |
| 32°F80% of yrs | Dec 3 | Dec 12 | Dec 24 | Dec 31 | Jan 5 | Jan 11 | Jan 16 | Jan 26 | Feb 6 |
| 28°F43% of yrs | too rare for a date | ||||||||
| 24°F13% of yrs | too rare for a date | ||||||||
| 20°F2% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Jacksonville NAS, 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 32068 →Compare Middleburg with another place →
Weather by month in Middleburg
July is the warmest month at Jacksonville NAS, FL, averaging 92°F by day and 76°F at night; January is the coldest at 66°F and 47°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 12% of years.
Warmth for growing adds up to 7,918 growing degree days a year (base 50°F), fewer than at 58% of the 158 Florida stations. 43% of them (3,415) have built up by the end of June, and July adds the most, 1,051. Precipitation totals 47.7 inches a year, most in June (7.3") and least in November (2.0"); May to September bring 61% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 66 | 47 | 2.9 | 55% | 2 | 237 |
| Feb | 69 | 50 | 2.3 | 34% | 1 | 281 |
| Mar | 74 | 55 | 3.1 | 12% | <1 | 459 |
| Apr | 81 | 61 | 2.4 | 0% | 0 | 624 |
| May | 86 | 69 | 3.2 | 0% | 0 | 854 |
| Jun | 90 | 74 | 7.3 | 0% | 0 | 960 |
| Jul | 92 | 76 | 6.0 | 0% | 0 | 1051 |
| Aug | 91 | 76 | 6.3 | 0% | 0 | 1045 |
| Sep | 88 | 74 | 6.1 | 0% | 0 | 925 |
| Oct | 82 | 66 | 3.6 | 0% | 0 | 738 |
| Nov | 73 | 56 | 2.0 | 5% | 0 | 444 |
| Dec | 68 | 50 | 2.5 | 29% | 1 | 300 |
Monthly normals 1991–2020 at Jacksonville NAS, FL (20 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, Starke, FL, 17 miles southwest of Middleburg, has a last frost 7 days later (February 8), a first frost 12 days earlier (December 24), a season 17 days shorter.
When it snows in Middleburg, Florida
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Glen St Mary 1 W, FL, 22.8 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 32068 is 17 miles from Jacksonville NAS, FL, which stands at 20 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 19 other ZIP codes share the station; its figures are presented in full for 32259 (Saint Johns). The 2023 USDA Plant Hardiness Zone Map lists ZIP 32068 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°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.