GreenlyLast and first frost dates in San Juan (Puerto Rico)
Puerto Rico
San Juan (Puerto Rico) had no frost in 2016–2025, so crops are planted by warmth and rain rather than by frost dates.
Your location is not available. Pick your city from the list below.
| 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 San Juan (Puerto Rico)
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 San Juan (Puerto Rico)
Seeds, seedlings and markets in San Juan (Puerto Rico)
Within 15 km of San Juan (Puerto Rico) OpenStreetMap lists 8 garden centres, 2 farm-supply shops, 1 plant nursery, 13 markets and 2 farm shops (collected 28 October 2026). The nearest garden centre to the city centre is Plaza Santurce, 5 km away.
- Plaza Santurce — garden centre
Avenida Fernández Juncos 1003, 00907 San Juan · 5 km - Colmado Granja La Pollera — farm supply
Antigua PR-27 749, 00915 San Juan · Mon–Fri 07:00–18:00, Sat 07:00–20:00, Sun 07:00–16:00 · 9 km - Mercado Agrícola Natural Viejo San Juan — market
Calle de Norzagaray, 00901 San Juan · Sat 08:00–14:00 · 0 km · facebook.com - Finca Yabisi at Mercado Agrícola Natural VSJ — farm shop
Calle de Norzagaray, 00901 San Juan · Sat 08:00–13:00 · 0 km · yabisi.farm - Red Roses Gardens — garden centre
Avenida Dr. José Celso Barbosa, 00917 San Juan · 9 km - Agrocentro — farm supply
Carretera 169, 00971 Guaynabo · 15 km
Places: © OpenStreetMap contributors, ODbL.
San Juan (Puerto Rico): weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in San Juan (Puerto Rico) by month
Average weather in San Juan (Puerto Rico) over 2016–2025: the warmest month is September. Months that average 20 °C or more by day: January–December (27.4–30.6 °C). Months that average 30 °C or more by day: June–October (30.1–30.6 °C). No month averages below 0 °C at night; the coldest nights, in February, average 22.8 °C. About 1203 mm of rain falls in a year, on 228 days; September is the wettest month (163 mm) and June the driest (63 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 27.5 | 22.9 | 68 | 15 |
| February | 27.4 | 22.8 | 83 | 17 |
| March | 27.9 | 22.8 | 73 | 17 |
| April | 28.6 | 23.4 | 103 | 19 |
| May | 29.6 | 24.4 | 92 | 20 |
| June | 30.4 | 25.3 | 63 | 16 |
| July | 30.2 | 25.7 | 95 | 20 |
| August | 30.4 | 25.8 | 109 | 21 |
| September | 30.6 | 25.5 | 163 | 23 |
| October | 30.1 | 25.1 | 134 | 22 |
| November | 28.9 | 24.4 | 143 | 19 |
| December | 28 | 23.7 | 77 | 19 |
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).
