Uyuni Weather in September
What's the weather like in Uyuni (Potosí) in September 2025?
The climate in Uyuni during September can be summarized as cool and very dry.
September is in the spring in Uyuni and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a cool 16°C (60°F), whilst at night -2°C (28°F) is normal.
| Daytime temperature | 15.7°C 60.2°F |
|---|---|
| Nightly temperature | -2.1°C 28.3°F |
| Average temperature | 6.8°C 44.2°F |
| Daily sunshine | 9.1 hrs |
| Avg rainfall | 2 mm 0.1 ins |
| Rainy days | 2 days |
| Sea temperature | 17.8°C 64°F |
| Humidity | 36% |
| Windspeed | 17.3kph 11 mph |
On average September is the 6th wettest month of the year in Uyuni with around 2mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 9.1 hours of sunshine per day.
September temperatures in Uyuni
September rainfall
September hourly sunshine
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 Uyuni in September 2025.
Other monthly averages
Best places to visit in September
Uyuni weather stats
| Hottest month: | January | 16.3°C 61.3°F |
|---|---|---|
| Driest month: | April | 1mm 0ins |
| Sunniest month: | August | 9.9hrs |
| Coldest month: | July | 13°C 55.4°F |
| Wettest month: | January | 42mm 1.7ins |
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