Climate averages 1991–2020
Stanley weather
in December.
A cool, 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 cool month in Stanley: daytime highs average 12.0°C and nights cool to about 6.7°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 66 mm of rain on roughly 14 days, which makes December a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 16 h 34 min on an average December day.
The nearest other city in this atlas is Río Gallegos (785 km away). In December its highs average 17.2°C, 5.2°C warmer than Stanley, with 48 mm of rain.
From December to January, average highs rise by 1.3°C to 13.4°C, and monthly rainfall falls from 66 mm to 62 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
Stanley climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.4°C7.9°C | 7.9°C | 62 | 13.1 | 16.116 h |
| February | 13.0°C7.8°C | 7.8°C | 53 | 12.0 | 14.514 h |
| March | 11.8°C7.0°C | 7.0°C | 55 | 12.1 | 12.513 h |
| April | 9.3°C5.3°C | 5.3°C | 51 | 12.5 | 10.511 h |
| May | 6.9°C3.6°C | 3.6°C | 48 | 12.0 | 8.89 h |
| June | 5.0°C1.9°C | 1.9°C | 47 | 12.3 | 7.98 h |
| July | 4.5°C1.3°C | 1.3°C | 49 | 12.3 | 8.38 h |
| August | 5.4°C1.8°C | 1.8°C | 39 | 10.3 | 9.810 h |
| September | 6.5°C2.3°C | 2.3°C | 37 | 9.9 | 11.712 h |
| October | 8.6°C3.7°C | 3.7°C | 41 | 10.1 | 13.714 h |
| November | 10.6°C5.3°C | 5.3°C | 50 | 11.5 | 15.516 h |
| December, selected | 12.0°C6.7°C | 6.7°C | 66 | 14.2 | 16.617 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
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 Stanley) is explained once on the Stanley year overview and on the Sources, method and limits page.