Río Gallegos Weather in September
What's the weather like in Río Gallegos (Santa Cruz) in September 2025?
The climate in Río Gallegos during September can be summarized as cool and very dry.
September is in the spring in Río Gallegos and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a cool 11°C (52°F), whilst at night 1°C (34°F) is normal.
| Daytime temperature | 10.9°C 51.5°F |
|---|---|
| Nightly temperature | 1.2°C 34.1°F |
| Average temperature | 6°C 42.8°F |
| Daily sunshine | 6.1 hrs |
| Avg rainfall | 10 mm 0.4 ins |
| Rainy days | 5 days |
| Sea temperature | 5°C 41°F |
| Humidity | 68% |
| Windspeed | 23.8kph 15 mph |
On average September is the driest month of the year in Río Gallegos with around 10mm 0.4 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 6.1 hours of sunshine per day.
September temperatures in Río Gallegos
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 Río Gallegos in September 2025.
Other monthly averages
Best places to visit in September
Río Gallegos weather stats
| Hottest month: | January | 18.7°C 65.7°F |
|---|---|---|
| Driest month: | September | 10mm 0.4ins |
| Sunniest month: | September | 6.1hrs |
| Coldest month: | July | 4.2°C 39.6°F |
| Wettest month: | January | 32mm 1.3ins |
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