USDA Hardiness Zone 12b
Frost Dates for 00623 — Cabo Rojo, Puerto Rico
NOAA 1991–2020 normals from Lajas Substn, PR (90 ft), 6 miles southeast.
Updated
No night at or below 32°F was recorded at Lajas Substn, PR in 1991–2020, not even 36°F, so Cabo Rojo has no frost dates to plan around; the coolest month, February, averages a low of 62°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 0%
- Coldest month low
- 62°F
- Hardiness zone
- 12b
32°F or below, 1991–2020
frost possible on leaves
average, February
55 to 60°F (12.8 to 15.6°C) coldest night
Frost risk by date in Cabo Rojo
Lajas Substn, PR, 6 miles southeast of Cabo Rojo, did not record a night at or below 32°F in 1991–2020. All 25 other Puerto Rico stations behind this site's ZIP pages recorded no 32°F night either.
Freeze probabilities 1991–2020 at Lajas Substn, PR, 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 00623 →Compare Cabo Rojo with another place →
Weather by month in Cabo Rojo
July is the warmest month at Lajas Substn, PR, averaging 92°F by day and 70°F at night; February is the coldest at 87°F and 62°F. Not one month recorded a 32°F night; the lowest monthly average low is 62°F.
Warmth for growing adds up to 10,320 growing degree days a year (base 50°F), more than at 52% of the 25 Puerto Rico stations. 47% of them (4,881) have built up by the end of June, and July adds the most, 966. Precipitation totals 44.9 inches a year, most in October (6.3") and least in December (2.0"); May to September bring 46% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 87 | 62 | 2.2 | 0% | 0 | 766 |
| Feb | 87 | 62 | 2.3 | 0% | 0 | 689 |
| Mar | 87 | 63 | 2.5 | 0% | 0 | 787 |
| Apr | 88 | 66 | 3.3 | 0% | 0 | 812 |
| May | 90 | 69 | 4.4 | 0% | 0 | 905 |
| Jun | 91 | 70 | 2.2 | 0% | 0 | 923 |
| Jul | 92 | 70 | 3.5 | 0% | 0 | 966 |
| Aug | 92 | 70 | 4.9 | 0% | 0 | 963 |
| Sep | 91 | 70 | 5.7 | 0% | 0 | 921 |
| Oct | 91 | 70 | 6.3 | 0% | 0 | 941 |
| Nov | 89 | 67 | 5.6 | 0% | 0 | 848 |
| Dec | 88 | 64 | 2.0 | 0% | 0 | 801 |
Monthly normals 1991–2020 at Lajas Substn, PR (90 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, Mayaguez City, PR, 7 miles north of Cabo Rojo, has no 32°F night on record either, and a coolest-month low 5°F warmer (67°F).
Where these figures come from
ZIP 00623 is 6 miles from Lajas Substn, PR, which stands at 90 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 00623 in zone 12b, the band where the coldest night of the year averaged 55 to 60°F (12.8 to 15.6°C) over 1991–2020; a zone describes winter lows, not frost dates.
Frost dates across Puerto Rico →
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.