USDA Hardiness Zone 10b
Frost Dates for 33445 — Delray Beach, Florida
NOAA 1991–2020 normals from Loxahatchee Nwr, FL (21 ft), 7 miles west.
Updated
Frost is not a yearly event in Delray Beach: a night at or below 32°F came in 11% of the winters of 1991–2020 at Loxahatchee Nwr, FL, and a 36°F night, cold enough for frost on exposed leaves, in 37%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 11%
- Winters with 36°F
- 37%
- Coldest month low
- 56°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 17 observed
NOAA normal
Frost risk by date in Delray Beach
At Loxahatchee Nwr, FL, 7 miles west of Delray Beach, 11% of the winters of 1991–2020 had at least one night at or below 32°F, 1% reached 28°F. Even a 36°F night came in only 37% of winters. January is the month most likely to bring one: a 7% 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.
Freeze probabilities 1991–2020 at Loxahatchee Nwr, 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 33445 →Compare Delray Beach with another place →
Weather by month in Delray Beach
August is the warmest month at Loxahatchee Nwr, FL, averaging 90°F by day and 74°F at night; January is the coldest at 75°F and 56°F. Every month stays under a 10% chance of a 32°F night; January is the likeliest at 7%.
Warmth for growing adds up to 9,050 growing degree days a year (base 50°F), more than at 78% of the 158 Florida stations. 44% of them (4,023) have built up by the end of June, and August adds the most, 1,000. Precipitation totals 63.7 inches a year, most in June (9.7") and least in February (2.8"); May to September bring 60% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 75 | 56 | 3.3 | 7% | 0 | 471 |
| Feb | 77 | 58 | 2.8 | 3% | 0 | 485 |
| Mar | 79 | 61 | 3.0 | 0% | 0 | 622 |
| Apr | 83 | 64 | 3.1 | 0% | 0 | 701 |
| May | 86 | 68 | 5.0 | 0% | 0 | 831 |
| Jun | 88 | 73 | 9.7 | 0% | 0 | 914 |
| Jul | 90 | 74 | 6.7 | 0% | 0 | 991 |
| Aug | 90 | 74 | 8.3 | 0% | 0 | 1000 |
| Sep | 89 | 74 | 8.6 | 0% | 0 | 935 |
| Oct | 86 | 70 | 6.4 | 0% | 0 | 865 |
| Nov | 80 | 64 | 3.7 | 0% | 0 | 662 |
| Dec | 77 | 60 | 3.1 | 1% | 0 | 576 |
Monthly normals 1991–2020 at Loxahatchee Nwr, FL (21 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, Pompano Beach Airpark, FL, 14 miles south of Delray Beach, has a 32°F night in 1% of winters against 11% here, and a coolest-month low 4°F warmer (60°F).
When it snows in Delray Beach, Florida
Measurable snow is rare here: only 0 of 17 winters from 1991 to 2020 recorded 0.1 inch or more at Loxahatchee Nwr, FL, 7.3 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 33445 is 7 miles from Loxahatchee Nwr, FL, which stands at 21 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 16 other ZIP codes share the station; its figures are presented in full for 33467 (Lake Worth). The 2023 USDA Plant Hardiness Zone Map lists ZIP 33445 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.