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The weather in El Calafate is dry and its temperatures are mild. In the summer, the average maximum temperature reaches 18.6°C, whereas in the winter, the average minimum temperature is 1.8°C. The length of daylight varies according to season: December 21 has 17 and a half hours of light. Dawn starts at 5.30 am and the sky gets dark at about 11pm. The shortest day in the year is June 21, with only 8 hours of daylight: from 9.30 am to 5.30 pm.

WINDS: The prevailing winds blow from the West, mainly during the spring and summer days.

 RAINFALLS: In the Continental Ice area, rainfalls represent 8,000 annual millimiters, dropping to 1,000/1,500 millimiters in the Los Glaciares National Park. Meanwhile, the winds from the West carry scarce humidity to the steppe area. Therefore, rainfalls at El Calafate represent only 300 millimiters per year.

Weather chart for the Patagonian region

Zone Northern Atlantic Southern Atlantic Tierra del Fuego Los Glaciares
Data Prevailing winds blow from the West in this area and, there are frequent floods on the coast. The air is too dry. Rainfalls represent 250 annual millimiters and there are no snowfalls. Therefore, the general appearance of the soil is arid. The sea water temperature is mild, as the shores are bathed by the southern end of the warm current from Brazil. In general, this kind conditions are categorized as “plateau arid weather”. Rainfalls range from 200 to 300 annual millimiters. There are no snowfalls. Winds from the West and South are almost constant. The sea water temperature is cold. The sea and the mountains help moderate the weather. In the Río Grande area, the winds from the West blow at an average speed of 25 km/h and maximum speeds of up to 200 km/h, but there are quiet periods. In Ushuaia, the southwestern wind prevails, at an average speed of 15 km/h and maximum speeds of 100 km/h, with longer quiet periods. Near the Beagle Channel, it is usually cloudy. This is a foothill and mountain range area. There is a transition strip between the plateau and the forest, where rainfalls become more and more abundant. There are also important snowfalls. The mountain range moderates the winds.
Summer minimum temperature (ºC)
15
7
6
7
Summer maximum temperature (ºC)
30
23
18
19
Fall minimum temperature (ºC)
6
2
0
3
Fall maximum temperature (ºC)
24
14
10
11
Winter minimum temperature (ºC)
2
0
-15
-1
Winter maximum temperature (ºC)
16
10
3
6
Spring minimum temperature (ºC)
6
4
2
3
Spring maximum temperature (ºC)
25
19
11
9

Zone Northern Patagonian Lakes High Negro River Valley, Neuquén Río Negro Southern Line
Data The weather changes from very humid at the mountain range (the areas where the highest rainfall annual index in the country is recorded are included in this region) into humid at the border with the plateau. Rainfalls increase towards the West. There is plenty of snow in the winter. Rainfalls go from 200 to 400 mm per year. There are no snowfalls. The prevailing winds blow from the West. The topographic differences must be taken into account, as the weather is more moderate in the proximity of the rivers and more arid and cold as one gets closer to the plateau. This kind of weather is cold and very arid, with rainfalls of less than 200 annual millimiters (much less in some points). Therefore, this area is transformed into one of the most arid regions in the country. The winds blow almost constantly, prevailing from the West and South.
Summer minimum temperature (ºC)
5
8
8
Summer maximum temperature (ºC)
23
32
25
Fall minimum temperature (ºC)
0
2
2
Fall maximum temperature (ºC)
15
20
16
Winter minimum temperature (ºC)
-1
0
-4
Winter maximum temperature (ºC)
7
17
8
Spring minimum temperature (ºC)
0
5
1
Spring maximum temperature (ºC)
17
27
17

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