USDA Hardiness Zone 11a
Frost Dates for 33133 — Miami, Florida
NOAA 1991–2020 normals from Miami WSO City, FL (15 ft), 3 miles west.
Updated
No night at or below 32°F was recorded at Miami WSO City, FL in 1991–2020, not even 36°F, so Miami has no frost dates to plan around; the coolest month, January, averages a low of 64°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 0%
- Coldest month low
- 64°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
Miami WSO City, FL, 3 miles west of Miami, did not record a night at or below 32°F in 1991–2020. 13 of the 158 other Florida stations behind this site's ZIP pages recorded no 32°F night either.
Freeze probabilities 1991–2020 at Miami WSO City, 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 33133 →Compare Miami with another place →
Weather by month in Miami
July is the warmest month at Miami WSO City, FL, averaging 89°F by day and 80°F at night; January is the coldest at 75°F and 64°F. Not one month recorded a 32°F night; the lowest monthly average low is 64°F.
Warmth for growing adds up to 10,001 growing degree days a year (base 50°F), more than at 95% of the 158 Florida stations. 46% of them (4,555) have built up by the end of June, and July adds the most, 1,063. Precipitation totals 51.1 inches a year, most in June (8.7") and least in March (2.0"); 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 | 64 | 2.3 | 0% | 0 | 592 |
| Feb | 77 | 66 | 2.3 | 0% | 0 | 598 |
| Mar | 78 | 68 | 2.0 | 0% | 0 | 715 |
| Apr | 81 | 72 | 2.6 | 0% | 0 | 782 |
| May | 84 | 75 | 4.6 | 0% | 0 | 908 |
| Jun | 87 | 77 | 8.7 | 0% | 0 | 960 |
| Jul | 89 | 80 | 4.2 | 0% | 0 | 1063 |
| Aug | 89 | 79 | 5.9 | 0% | 0 | 1051 |
| Sep | 88 | 78 | 7.4 | 0% | 0 | 981 |
| Oct | 84 | 76 | 6.0 | 0% | 0 | 933 |
| Nov | 80 | 71 | 2.6 | 0% | 0 | 753 |
| Dec | 77 | 66 | 2.5 | 0% | 0 | 665 |
Monthly normals 1991–2020 at Miami WSO City, FL (15 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, 6 miles northwest of Miami, has no 32°F night on record either, and a coolest-month low 3°F colder (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, 6.5 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 33133 is 3 miles from Miami WSO City, FL, which stands at 15 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 9 other ZIP codes share the station; its figures are presented in full for 33155 (Miami). The 2023 USDA Plant Hardiness Zone Map lists ZIP 33133 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.