USDA Hardiness Zone 11a
Frost Dates for 33174 — Miami, Florida
NOAA 1991–2020 normals from Miami Nwsfo, FL (14 ft), 2 miles west.
Updated
Frost is not a yearly event in Miami: a night at or below 32°F came in 1% of the winters of 1991–2020 at Miami Nwsfo, FL, and a 36°F night, cold enough for frost on exposed leaves, in 10%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 1%
- Winters with 36°F
- 10%
- Coldest month low
- 59°F
- Hardiness zone
- 11a
32°F or below, 1991–2020
frost possible on leaves
average, January
40 to 45°F (4.4 to 7.2°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 Miami
At Miami Nwsfo, FL, 2 miles west of Miami, 1% of the winters of 1991–2020 had at least one night at or below 32°F, and none reached 28°F. Even a 36°F night came in only 10% of winters. January is the month most likely to bring one: a 1% 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 Miami Nwsfo, 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 33174 →Compare Miami with another place →
Weather by month in Miami
August is the warmest month at Miami Nwsfo, FL, averaging 91°F by day and 76°F at night; January is the coldest at 77°F and 59°F. Every month stays under a 10% chance of a 32°F night; January is the likeliest at 1%.
Warmth for growing adds up to 9,766 growing degree days a year (base 50°F), more than at 91% of the 158 Florida stations. 45% of them (4,434) have built up by the end of June, and August adds the most, 1,046. Precipitation totals 69.7 inches a year, most in August (10.8") and least in January (2.0"); May to September bring 65% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 77 | 59 | 2.0 | 1% | 0 | 544 |
| Feb | 78 | 61 | 2.2 | 0% | 0 | 546 |
| Mar | 81 | 63 | 2.3 | 0% | 0 | 684 |
| Apr | 85 | 67 | 3.4 | 0% | 0 | 779 |
| May | 87 | 71 | 6.4 | 0% | 0 | 911 |
| Jun | 90 | 75 | 10.4 | 0% | 0 | 971 |
| Jul | 91 | 76 | 8.7 | 0% | 0 | 1040 |
| Aug | 91 | 76 | 10.8 | 0% | 0 | 1046 |
| Sep | 90 | 76 | 9.3 | 0% | 0 | 984 |
| Oct | 87 | 73 | 8.4 | 0% | 0 | 918 |
| Nov | 82 | 66 | 3.4 | 0% | 0 | 719 |
| Dec | 78 | 62 | 2.4 | 0% | 0 | 625 |
Monthly normals 1991–2020 at Miami Nwsfo, FL (14 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, Miami International Airport, FL, 3 miles northeast of Miami, has a 32°F night in 0% of winters against 1% here, and a coolest-month low 2°F warmer (61°F).
When it snows in Miami, Florida
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Hialeah, FL, 5.9 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 33174 is 2 miles from Miami Nwsfo, FL, which stands at 14 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 8 other ZIP codes share the station; its figures are presented in full for 33165 (Miami). The 2023 USDA Plant Hardiness Zone Map lists ZIP 33174 in zone 11a, the band where the coldest night of the year averaged 40 to 45°F (4.4 to 7.2°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.