Weather in Guam in September

Search

Best
Best
Best
Best
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Sea
28°
Swim
Sea
28°
Swim
Sea
28°
Swim
Sea
28°
Swim
Sea
29°
Swim
Sea
29°
Swim
Sea
29°
Swim
Sea
29°
Swim
Sea
29°
Swim
Sea
30°
Swim
Sea
29°
Swim
Sea
28°
Swim

Visiting Guam in September

September has average maximum temperatures of 30°C (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 70% making it sunny but overcast at times. The hours of sunshine per day are 8.5hrs making the days long and bright. September has total rainfall of 30.3cm (11.9inches) making it rainy with a chance of occasional heavy tropical showers. There are 28.1 days with some rainfall so there are very few dry days to enjoy the beach. It is not an optimal time for sunbathing but it is possible on clearer days in Guam. Sea temperatures are a very warm 29°C (85°F). September is an excellent month for swimming in Guam with very comfortable temperatures for bathing all day.

Consider visiting Guam in the months of February, March, April, May, for the best beach weather.

Also consider one of our other suggestions for September.

Quick Links →

Can you sunbathe in Guam in September?

Yes, September is not an optimal time for sunbathing but it is possible on clearer days in Guam.

September has average maximum temperatures of 30°C (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 70% making it sunny but overcast at times. The hours of sunshine per day are 8.5hrs making the days long and bright. September has total rainfall of 30.3cm (11.9inches) making it rainy with a chance of occasional heavy tropical showers. There are 28.1 days with some rainfall so there are very few dry days to enjoy the beach.

More about September temperature and sunshine.

Can you swim in Guam in September?

Yes, September is an excellent month for swimming in Guam with very warm sea temperatures 29°C (85°F).

More about September sea temperatures.

Is September a good time to holiday in Guam?

Yes, September is a good time for a holiday in Guam.

September has average maximum temperatures of 30°C (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 70% making it sunny but overcast at times. The hours of sunshine per day are 8.5hrs making the days long and bright. September has total rainfall of 30.3cm (11.9inches) making it rainy with a chance of occasional heavy tropical showers. There are 28.1 days with some rainfall so there are very few dry days to enjoy the beach. It is not an optimal time for sunbathing but it is possible on clearer days in Guam. Sea temperatures are a very warm 29°C (85°F). September is an excellent month for swimming in Guam with very comfortable temperatures for bathing all day.

More about the September temperatures and sunshine.

Is Guam warm in September?

Yes, Guam is very hot and perfect for sunbathing on clear days in September.

The average maximum temperature in Guam in September is 30°C (87°F). The average maximum temperature is 30°C (86°) in the previous month and 30°C (86°F) in the next month.

The average temperature in Guam in September is 28°C (82°F). The average temperature is 27°C (81°F) in the previous month and 28°C (82°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Guam in September?

The average day light hours per day in Guam in September are 12.2. The sunshine percentage is 70% making it sunny but overcast at times. The hours of sunshine per day are 8.5hrs making the days long and bright.

More about September sunshine.

Temperature in Guam in September

The average maximum temperature in Guam in September is 30°C (87°F). The average maximum temperature is 30°C (86°F) in the previous month and 30°C (86°F) in the next month.

The average temperature in Guam in September is 28°C (82°F). The average temperature is 27°C (81°F) in the previous month and 28°C (82°F) in the next month.

The average minimum temperature in Guam in September is 25°C (77°F). The minimum temperature is 25°C (76°F) in the previous month and 25°C (77°F) in the next month.

Sunshine in Guam in September

During September the average day light hours are 12.2 per day in Guam. The sunshine percentage is 70% making it sunny but overcast at times. The hours of sunshine per day are 8.5hrs making the days long and bright.

The ultraviolet index in Guam in September is typically 13.7 during September. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Guam in September

The average sea water temperature in Guam in September is 29.3°C (84.7°F) which is very warm and ideal for relaxing and swimming for the whole day.

Rainfall in Guam in September

The average total rainfall in Guam in September is 30.3cm (11.9inches) and on average there are 28.1 rainy days in September making it a very wet time to visit the beach.

Humidity in Guam in September

The maximum dew point (an indicator of humidity) in Guam in September is 26°C (78°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning. The dew point is 25°C (78°F) in the previous month and 25°C (25°F) in the next month.

The average maximum relative humidity in Guam in September is typically 94.8%. The maximum relative humidity is 94.9% in the previous month and 94.1% in the next month.

The average relative humidity in Guam in September is typically 83.9%. The average relative humidity is 83.9% in the previous month and 83.8% in the next month.

Wind Speed in Guam in September

The average maximum wind speed in Guam in September is typically 23KM/H (14MPH). The average maximum wind speed is 23KM/H (14MPH) in the previous month and 24KM/H (15MPH) in the next month.

The average wind speed in Guam in September is typically 10KM/H (6MPH). The average wind speed is 10KM/H (6MPH) in the previous month and 11KM/H (7MPH) in the next month.

The average wind direction in Guam in September is from the East-Southeast.

Quick Links →

Monthly Averages

Suggested Beaches in September

Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

Booking.com Search FlightsImage

Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.