Climate averages 1991–2020
Río Gallegos weather
in September.
A cool, fairly dry month: the 8th warmest and the joint 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in Río Gallegos: daytime highs average 10.0°C and nights cool to about 1.4°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 21 mm of rain on roughly 6 days, which makes September a fairly dry month (the joint 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 39 min on an average September day.
The nearest other city in this atlas is Punta Arenas (205 km away). In September its highs average 6.7°C, 3.3°C cooler than Río Gallegos, with 54 mm of rain.
Among the 67 cities listed in Argentina, Río Gallegos ranks 66th of 67 for the warmest September highs and joint 8th of 67 for the driest September (rainfall, lowest first). The mean September high of those 67 cities is 19.4°C; Río Gallegos is 9.4°C cooler than that mean.
From September to October, average highs rise by 3.6°C to 13.6°C, and monthly rainfall rises from 21 mm to 22 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Río Gallegos climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.3°C8.5°C | 8.5°C | 42 | 10.9 | 16.116 h |
| February | 17.9°C8.2°C | 8.2°C | 34 | 8.3 | 14.514 h |
| March | 15.7°C6.8°C | 6.8°C | 37 | 9.0 | 12.513 h |
| April | 12.1°C4.1°C | 4.1°C | 29 | 7.4 | 10.511 h |
| May | 7.9°C1.3°C | 1.3°C | 26 | 5.9 | 8.89 h |
| June | 4.5°C-1.2°C | -1.2°C | 22 | 5.7 | 7.98 h |
| July | 4.6°C-1.6°C | -1.6°C | 20 | 5.5 | 8.38 h |
| August | 6.9°C-0.4°C | -0.4°C | 21 | 5.3 | 9.810 h |
| September, selected | 10.0°C1.4°C | 1.4°C | 21 | 6.1 | 11.712 h |
| October | 13.6°C3.6°C | 3.6°C | 22 | 6.5 | 13.614 h |
| November | 16.0°C5.8°C | 5.8°C | 31 | 9.2 | 15.515 h |
| December | 17.2°C7.5°C | 7.5°C | 48 | 12.1 | 16.517 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Punta Arenas in SeptemberChile · 205 kmHigh 6.7°C · Low 1.8°C · 54 mm rain
- Comodoro Rivadavia in SeptemberArgentina · 654 kmHigh 13.3°C · Low 6.5°C · 21 mm rain
- Stanley in SeptemberFalkland Islands · 785 kmHigh 6.5°C · Low 2.3°C · 37 mm rain
- Trelew in SeptemberArgentina · 977 kmHigh 17.3°C · Low 6.1°C · 18 mm rain
- San Carlos de Bariloche in SeptemberArgentina · 1176 kmHigh 7.2°C · Low 0.8°C · 68 mm rain
- General Roca in SeptemberArgentina · 1406 kmHigh 18.7°C · Low 7.0°C · 21 mm rain
- Neuquén in SeptemberArgentina · 1412 kmHigh 18.3°C · Low 6.5°C · 19 mm rain
- Cipolletti in SeptemberArgentina · 1415 kmHigh 18.5°C · Low 6.7°C · 19 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Río Gallegos) is explained once on the Río Gallegos year overview and on the Sources, method and limits page.