Guaynabo Weather in September

What's the weather like in Guaynabo (Guaynabo) in September 2024?

The climate in Guaynabo during September can be summarized as hot, humid and wet.

September is in the fall / autumn in Guaynabo and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a steamy 30°C (87°F), whilst at night 23°C (74°F) is normal.

Guaynabo weather averages (imperial / metric)
Daytime temperature 30.4°C 86.7°F
Nightly temperature 23.4°C 74.1°F
Average temperature 26.9°C 80.4°F
Daily sunshine 8.3 hrs
Avg rainfall 188 mm 7.4 ins
Rainy days 18 days
Sea temperature 29°C 84.2°F
Humidity 77%
Windspeed 14.4kph 9 mph

On average September is the 2nd wettest month of the year in Guaynabo with around 188mm 7.4 inches of rain making it a wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 hours of sunshine per day.

September temperatures in Guaynabo

Guaynabo average temperature in September

September rainfall

Guaynabo average rain in September

September hourly sunshine

Guaynabo average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Guaynabo in September 2024.

Other monthly averages

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Guaynabo weather stats

Guaynabo weather statistics
Hottest month: August 30.2°C 86.4°F
Driest month: March 79mm 3.1ins
Sunniest month: March 9.6hrs
Coldest month: February 26.9°C 80.4°F
Wettest month: August 195mm 7.7ins
Map showing location of Guaynabo (18.35745, -66.111) Guaynabo map pin © Google

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