Climate averages 1991–2020
Río Gallegos weather
in December.
A mild, moderately wet month: the 3rd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Río Gallegos: daytime highs average 17.2°C and nights cool to about 7.5°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 48 mm of rain on roughly 12 days, which makes December a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 16 h 33 min on an average December day.
The nearest other city in this atlas is Punta Arenas (205 km away). In December its highs average 11.4°C, 5.7°C cooler than Río Gallegos, with 88 mm of rain.
Among the 67 cities listed in Argentina, Río Gallegos ranks joint 66th of 67 for the warmest December highs and joint 10th of 67 for the driest December (rainfall, lowest first). The mean December high of those 67 cities is 27.9°C; Río Gallegos is 10.7°C cooler than that mean.
From December to January, average highs rise by 1.1°C to 18.3°C, and monthly rainfall falls from 48 mm to 42 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Punta Arenas in DecemberChile · 205 kmHigh 11.4°C · Low 6.1°C · 88 mm rain
- Comodoro Rivadavia in DecemberArgentina · 654 kmHigh 21.5°C · Low 12.9°C · 13 mm rain
- Stanley in DecemberFalkland Islands · 785 kmHigh 12.0°C · Low 6.7°C · 66 mm rain
- Trelew in DecemberArgentina · 977 kmHigh 27.3°C · Low 14.5°C · 18 mm rain
- San Carlos de Bariloche in DecemberArgentina · 1176 kmHigh 17.2°C · Low 7.1°C · 47 mm rain
- General Roca in DecemberArgentina · 1406 kmHigh 30.2°C · Low 17.0°C · 16 mm rain
- Neuquén in DecemberArgentina · 1412 kmHigh 30.0°C · Low 16.5°C · 14 mm rain
- Cipolletti in DecemberArgentina · 1415 kmHigh 30.1°C · Low 16.7°C · 14 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.