Climate averages 1991–2020
Comodoro Rivadavia weather
in September.
A cool, fairly dry month: the 8th warmest and the joint 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in Comodoro Rivadavia: daytime highs average 13.3°C and nights cool to about 6.5°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 21 mm of rain on roughly 4 days, which makes September a fairly dry month (the joint 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 44 min on an average September day.
The nearest other city in this atlas is Trelew (338 km away). In September its highs average 17.3°C, 4.0°C warmer than Comodoro Rivadavia, with 18 mm of rain.
Among the 67 cities listed in Argentina, Comodoro Rivadavia ranks 65th 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; Comodoro Rivadavia is 6.1°C cooler than that mean.
From September to October, average highs rise by 3.0°C to 16.3°C, and monthly rainfall falls from 21 mm to 17 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
Comodoro Rivadavia climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.2°C14.4°C | 14.4°C | 9.6 | 2.7 | 15.315 h |
| February | 22.1°C14.0°C | 14.0°C | 20 | 3.1 | 14.014 h |
| March | 20.2°C12.6°C | 12.6°C | 25 | 3.7 | 12.412 h |
| April | 16.8°C10.1°C | 10.1°C | 22 | 3.5 | 10.811 h |
| May | 12.8°C7.3°C | 7.3°C | 29 | 4.9 | 9.59 h |
| June | 9.5°C4.9°C | 4.9°C | 32 | 5.5 | 8.79 h |
| July | 9.1°C4.1°C | 4.1°C | 20 | 4.3 | 9.09 h |
| August | 11.0°C5.1°C | 5.1°C | 21 | 5.0 | 10.210 h |
| September, selected | 13.3°C6.5°C | 6.5°C | 21 | 4.4 | 11.712 h |
| October | 16.3°C8.6°C | 8.6°C | 17 | 3.9 | 13.413 h |
| November | 19.2°C10.9°C | 10.9°C | 14 | 3.2 | 14.815 h |
| December | 21.5°C12.9°C | 12.9°C | 13 | 3.0 | 15.616 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
- Trelew in SeptemberArgentina · 338 kmHigh 17.3°C · Low 6.1°C · 18 mm rain
- San Carlos de Bariloche in SeptemberArgentina · 608 kmHigh 7.2°C · Low 0.8°C · 68 mm rain
- Río Gallegos in SeptemberArgentina · 654 kmHigh 10.0°C · Low 1.4°C · 21 mm rain
- Puerto Montt in SeptemberChile · 656 kmHigh 12.0°C · Low 5.5°C · 185 mm rain
- Osorno in SeptemberChile · 744 kmHigh 12.9°C · Low 4.5°C · 129 mm rain
- General Roca in SeptemberArgentina · 759 kmHigh 18.7°C · Low 7.0°C · 21 mm rain
- Neuquén in SeptemberArgentina · 770 kmHigh 18.3°C · Low 6.5°C · 19 mm rain
- Cipolletti in SeptemberArgentina · 772 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 Comodoro Rivadavia) is explained once on the Comodoro Rivadavia year overview and on the Sources, method and limits page.