Guaynabo, Puerto Rico Weather Forecast
Guaynabo is in Guaynabo County, Puerto Rico. This page has current conditions, radar, a 7-day forecast, observed rainfall and the NWS written forecast for the area.
Active Weather Alerts
7-Day Forecast for Guaynabo
Loading forecast...
Growing Conditions
Growing degree days
6,448
since Apr 1, base 50°F
Rain, last 30 days
2.65 in
model analysis
Rain, year to date
26.29 in
since Jan 1
2-inch soil temperature
89°F
yesterday, daily average
Reference ET, last 7 days
1.23 in
FAO-56 grass reference
Through Oct 23. Season totals use model analysis for this point and update every morning.
Soil, ET and spray tools for Guaynabo →
Current Stats & Observations
NWS Forecast
About Guaynabo Weather
Guaynabo sits at about 200 feet above sea level in Guaynabo County, Puerto Rico. About 68,024 people live in the Guaynabo area. Official forecasts and warnings for the area come from the National Weather Service SJU office, and the nearest NEXRAD radar site is TJUA. The city is in USDA plant hardiness zone 13a, where the coldest winter night typically falls between 60 to 65°F. Freezing temperatures are rare here.