Ushuaia weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Poor
Best time to visit: May – March
What is the weather like in Ushuaia in September?
In September, Ushuaia is cold: daytime highs average 4 °C, and nights often drop below freezing (−2 °C). The sea averages 5.9 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Precipitation, often as snow, falls on about 15 days, totalling 60 mm. Snow falls on about 8 days. All in all, September is not an ideal month for a holiday in Ushuaia.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 5 | 9 | 8 |
| Day | 2° | 4° | 7° |
| Night | −3° | −2° | 0° |
| Sea | 6° | 6° | 6° |
| Sun | 3 h | 4 h | 5 h |
| Rain days | 15 | 15 | 17 |
More details for September
- Daylight
- 11 h 34 min07:42 – 19:15
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 72 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 8 days1 cm or more of fresh snowAll months
- Time zone
- UTC−3America/Argentina/Ushuaia
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %20 %
- Few rainy daysweight 20 %24 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Ushuaia in September: quick answers
Is Ushuaia hot in September?
No. In September, Ushuaia is cold: daytime highs average 4 °C and nights drop to about −2 °C.
Can you swim in Ushuaia in September?
Only if you don't mind cold water: in September the sea averages just 5.9 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Ushuaia in September?
It rains often – on about 15 days, adding up to 60 mm.
Ushuaia month by month
The whole year in UshuaiaAll destinations: ArgentinaWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences