Normal weather for Guam in September
It's hot in September in Guam with an average temperature of 31°C. Temperatures this month range from a low of 30°C to a high of 32°C. At night, you can expect temperatures between 25°C and 26°C.
In September, there is an average of 643 mm of precipitation, spread over 29 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
After some sun? Then September isn’t the best time to be in Guam. The temperature is pleasant, but there’s too much chance of rain this month.
Guam in September |
UK | ||
|---|---|---|---|
 Average Temperature |
31°C | 20°C | |
 High Temp |
32°C | 22°C | |
| Low Temp |
30°C | 17°C | |
 Total Precipitation |
643 mm | 44 mm | |
| Rainy Days |
29 days | 8 days | |
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
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Start of September
The month of September starts in Guam with hot temperatures, averaging around 32°C during the day and nights close to 26°C. Plenty of days with a chance of precipitation.
Mid-September
By mid-September, the average daytime temperature drops to around 31°C, with nights close to 26°C. The chance of precipitation is high during this period.
End of September
By the end of September, the average daytime temperature in Guam will be around 31°C, with nights close to 26°C. There’s a significant chance of many days with precipitation.
Temperature records
With 35°C, Guam hit the highest temperature in the last 10 years in September 2016. The lowest daytime temperature in this month was 26°C in 2017. The extreme night temperatures ranged from a low of 12°C to a high of 29°C.
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Daily Temperature in September in Guam
This chart shows the average daily high temperatures in September in Guam, measured in degrees Celsius. The bottom of the chart shows the days of September. Based on historical data, it shows the average daily temperatures for this month.
Weather experiences in September in Guam
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The sky was clear and there were beautiful sunsets.... more
Daily Precipitation in September in Guam
The chart below shows the average daily precipitation in September for Guam, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 29 days of rain in Guam.
Daily UV Index in September in Guam
This chart shows the average daily UV index in September in Guam, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Guam Over the Years
This chart shows the average temperature in September in Guam, measured in degrees Celsius, over the past years.
Total Precipitation in September in Guam Over the Years
This chart shows the average precipitation in September in Guam, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Guam
Click on a specific day in September for detailed info on the typical weather on that day in Guam. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Guam
The weather in September in Guam is rated 4 out of 5 stars by 1 visitor. Have you been to Guam? Share your weather experience to help other visitors.
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The sky was clear and there were beautiful sunsets.— This text is automatically translated to English
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Average Weather in Guam by Month
Click on a month below to see detailed weather info for Guam. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
