GreenlyLast and first frost dates in Arecibo
Puerto Rico
Arecibo had no frost in 2016–2025, so crops are planted by warmth and rain rather than by frost dates.
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| Last spring frost | none in ten years |
|---|---|
| First autumn frost | none in ten years |
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
There is no frost season here: crops are planted by warmth and rain rather than by frost dates.
When the soil warms up in Arecibo
The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo).
| Soil | Date |
|---|---|
| 5 °C | already in the first week of January |
| 10 °C | already in the first week of January |
| 15 °C | already in the first week of January |
| 18 °C | already in the first week of January |
Frost dates near Arecibo
| City | Distance | Last spring frost | First autumn frost |
|---|---|---|---|
| Ponce | 52 km | — | — |
| Mayagüez | 54 km | — | — |
| San Juan (Puerto Rico) | 63 km | — | — |
| Higüey | 210 km | — | — |
| La Romana | 237 km | — | — |
Arecibo: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in Arecibo by month
Average weather in Arecibo over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: January–December (28.5–31.6 °C). Months that average 30 °C or more by day: May–October (30.5–31.6 °C). No month averages below 0 °C at night; the coldest nights, in February, average 21 °C. About 1236 mm of rain falls in a year, on 246 days; September is the wettest month (178 mm) and December the driest (56 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 28.5 | 21.1 | 60 | 16 |
| February | 28.5 | 21 | 64 | 17 |
| March | 28.8 | 21 | 86 | 19 |
| April | 29.4 | 21.7 | 102 | 19 |
| May | 30.5 | 22.8 | 115 | 22 |
| June | 31.3 | 23.8 | 84 | 20 |
| July | 31.5 | 24.4 | 89 | 21 |
| August | 31.6 | 24.4 | 124 | 24 |
| September | 31.4 | 24.1 | 178 | 25 |
| October | 30.9 | 23.6 | 150 | 25 |
| November | 29.7 | 22.8 | 128 | 21 |
| December | 29 | 21.8 | 56 | 17 |
Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).
