Upolu island in september: average Weather, Temperature and Climate
Weather in Upolu island in september 2025
The weather in Upolu island in the month of september comes from statistical datas on the last years. You can view the weather statistics for all the month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 7
Weather at 6am
81°F
Moderate rain at times
47% of time
30%
10%
8%
Weather at 12pm
83°F
Partly Cloudy
39% of time
36%
15%
8%
Weather at 6pm
83°F
Moderate rain at times
42% of time
34%
16%
7%
Weather at 3am
83°F
37%
37%
13%
7%
Evolution of daily average temperature and precipitation in Upolu island in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Upolu island in september.
The climate of Upolu island in september is good
The climate in september in Upolu island is wet (with 5.5in of rainfall over 7 days). This is better than the previous month since in august it receives an average of 7.1in of precipitation over 10 days.
The climate quite comfortable in this location september. The thermometer averaged maximum of 83°F. The seasonal minimum is 81°F. Thus, the mean temperature average in september in Upolu island is 83°F. Note that these seasonal averages are in contrast with those observed in Upolu island in the month of september with a maximum record of 85°F in 2016 and a minimum record of 65°F in 2021.
On this month of september, day length in Upolu island is generally 12:00. Sunrise is at 06:22 and sets at 18:22.
With a correct weather, the month of september is okay (but not the best) to go in that area in Samoan Islands.
Seasonal average climate and temperature of Upolu island in september
Check below seasonal norms These statistics are set from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 83°F | ||||
| Highest temperature | 83°F | ||||
| Lowest temperature | 81°F | ||||
| Highest record temperature | 85°F (2016) | ||||
| Lowest record temperature | 65°F (2021) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 83°F | ||||
| Lowest sea temperature | 81°F | ||||
| Highest sea temperature | 85°F | ||||
| Wind | |||||
| Wind speed | 26km/h | ||||
| Wind temperature | 81°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 5.5in | ||||
| Number of days with rainfall | 7 day(s) (25%) | ||||
| Record daily rainfall | 2.4in (2020) | ||||
| Other climate data | |||||
| Humidity | 79% | ||||
| Visibility | 9.57km | ||||
| Cloud cover | 47% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:22 | ||||
| Time of sunset | 18:22 | ||||
| Length of day | 12:00 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Upolu island in september 2024:
79°F to 81°F
79°F to 81°F
79°F to 79°F
79°F to 81°F
79°F to 81°F
79°F to 81°F
77°F to 79°F
79°F to 81°F
81°F to 81°F
81°F to 81°F
81°F to 81°F
81°F to 81°F
79°F to 81°F
81°F to 81°F
81°F to 81°F
81°F to 81°F
79°F to 83°F
81°F to 81°F
81°F to 81°F
81°F to 83°F
81°F to 81°F
81°F to 81°F
81°F to 81°F
81°F to 81°F
79°F to 81°F
79°F to 81°F
81°F to 81°F
81°F to 83°F
79°F to 81°F
79°F to 81°F
Map: other cities in Samoan Islands in september
Cities near Upolu island:
| Apia in september | good weather |
| O Le Pupu-Pue National Park in september | good weather |
| Lotofaga in september | good weather |
| Lalomanu Beach in september | good weather |
| Manono island in september | good weather |
| Apolima island in september | good weather |
| Salelologa in september | good weather |
| Savai'i island in september | tolerable weather |
| Manase in september | tolerable weather |
| Pago Pago (American Samoa) in september | good weather |
Click over cities on the map for information about the weather in september.
Upolu island
perfect weather
good
tolerable
bad
very bad
Weather data for Upolu island in september:
Weather data for Upolu island for september are derived from an average of the weather forecast since 2009 in Upolu island. There is a margin of error and these forecasts are to be considered as general information only. The weather in Upolu island can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Upolu island.