Measurements:
°C
°F
Guam
84°F
W 17 mph
Feels like: 92°F
Precip: 0%
World Resorts Northern Mariana Islands Guam Weather September Weather in Guam

Guam Weather: September

Average Day Temperature: 90.9°F
Average Night Temperature: 86.1°F
Sea Water Temperature: 89.4°F
Number of Sunny Days: 5 days
Sunshine Hours: 12.0 - 12.4 hours
Number of Rainy Days: 14 days
Precipitation Totals: 10.4 in

Air Temperature in September, °F

Select Year: 2024 2023 2022

The highest day temperature in September 2024 was 90°F. The lowest night temperature was 82°F. The average values for day and night temperatures during September were 87.8°F и 84.9°F respectivly.

Guam Water Sea Temperature in September, °F

Select Year: 2024 2023 2022

The average sea surface temperature in September 2024 for Guam was 89.9°F. The maximum and minimum values were 88.6°F and 90.8°F respectively.

Sunny, Cloudy and Gloomy days

Most of the days in September are cloudy but you can also expect sunny or gloomy days.

Precipitation Totals in September, in

Precipitation total in September for Guam is 10.4 in. It makes september the most rainy month of the year.

Wind Speed in September, mph

The average wind speed in September is 9.7 mph. It makes September one of the most windless months of the year for Guam.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Guam in September is 6.0 hours.

Best Time to Visit Guam
The most sunny months:
July 6 days
August 5 days
September 5 days
The most warm months:
June 91.9 °F
July 91.8 °F
August 91.3 °F
Warmest sea temperature:
August 89.4 °F
September 89.4 °F
July 89.3 °F
The most cold months:
February 87.0 °F
January 87.7 °F
March 88.1 °F
The most rainy months:
October 16 days
July 14 days
August 14 days
The most windy months:
December 17 mph
February 17 mph
January 17 mph

Guam on the Weather Map

Northern Mariana Islands Resorts:
NAME
Guam +84
Rota +86
Saipan +86
Susupe +86
Tinian +86
24 Hours Weather Forecast
Guam
Local time: 23:13
26 dec, thursday
0000 84°F
W
17 mph
0300 84°F
W
17 mph
0600 84°F
SW
16 mph
0900 86°F
SW
19 mph
1200 86°F
SW
21 mph
1500 86°F
SW
21 mph
1800 84°F
W
19 mph
2100 84°F
W
19 mph