USDA Hardiness Zone 13a
Frost Dates for 00612 — Arecibo, Puerto Rico
NOAA 1991–2020 normals from Arecibo Obsy, PR (1,060 ft), 8 miles southwest.
Updated
No night at or below 32°F was recorded at Arecibo Obsy, PR in 1991–2020, not even 36°F, so Arecibo has no frost dates to plan around; the coolest month, February, averages a low of 61°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 0%
- Coldest month low
- 61°F
- Hardiness zone
- 13a
32°F or below, 1991–2020
frost possible on leaves
average, February
60 to 65°F (15.6 to 18.3°C) coldest night
Frost risk by date in Arecibo
Arecibo Obsy, PR, 8 miles southwest of Arecibo, 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 Arecibo Obsy, 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 00612 →Compare Arecibo with another place →
Weather by month in Arecibo
August is the warmest month at Arecibo Obsy, PR, averaging 86°F by day and 67°F at night; January is the coldest at 80°F and 61°F. Not one month recorded a 32°F night; the lowest monthly average low is 61°F.
Warmth for growing adds up to 8,725 growing degree days a year (base 50°F), fewer than at 84% of the 25 Puerto Rico stations. 47% of them (4,107) have built up by the end of June, and August adds the most, 826. Precipitation totals 84.6 inches a year, most in May (10.4") and least in February (3.5"); May to September bring 51% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 80 | 61 | 4.3 | 0% | 0 | 634 |
| Feb | 81 | 61 | 3.5 | 0% | 0 | 578 |
| Mar | 82 | 61 | 5.3 | 0% | 0 | 659 |
| Apr | 83 | 62 | 7.4 | 0% | 0 | 684 |
| May | 85 | 65 | 10.4 | 0% | 0 | 763 |
| Jun | 87 | 66 | 6.7 | 0% | 0 | 789 |
| Jul | 87 | 66 | 6.9 | 0% | 0 | 820 |
| Aug | 86 | 67 | 9.5 | 0% | 0 | 826 |
| Sep | 86 | 67 | 9.9 | 0% | 0 | 795 |
| Oct | 86 | 66 | 8.3 | 0% | 0 | 800 |
| Nov | 82 | 65 | 7.6 | 0% | 0 | 707 |
| Dec | 81 | 63 | 4.8 | 0% | 0 | 671 |
Monthly normals 1991–2020 at Arecibo Obsy, PR (1,060 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, Dos Bocas, PR, 8 miles south of Arecibo and 860 feet lower, has no 32°F night on record either, and a coolest-month low 3°F warmer (64°F).
Where these figures come from
ZIP 00612 is 8 miles from Arecibo Obsy, PR, which stands at 1,060 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 00612 in zone 13a, the band where the coldest night of the year averaged 60 to 65°F (15.6 to 18.3°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.