Jujuy is a big diverse province - San Salvador de Jujuy (commonly known as just Jujuy) is 170km away in lowland forest at 125m altitude and enjoys a humid subtropical climate as opposed to the desert conditions at 3900m
Nearest town seems to be Susques - just over the hill (and of course hills can have big implications for where rain falls) but at least there seems to be some weather information online
http://www.weather.com/weather/monthly/l/ARXX4149:1:AR
Weather won't be exactly the same as Olaroz but at least it is within about 40km and at similar, albeit 300m lower, altitude.
January, 1 day light rain, 2 days drizzle
February, 1 day drizzle
March, nothing
April, nothing
May, nothing
June, nothing
July, nothing
August, nothing
There may be rainfall stats on the met service site but I haven't been able to find them...
http://www.smn.gov.ar/?mod=clima&id=30&provincia=Jujuy&ciudad=Jujuy
Nothing to suggest a problem from the above, but pond performance will be far more affected by humidity and wind conditions on the dry days than any setback from a few days of rain. Advice throughout the year indicates lithium inventories are building at least in line with nameplate rates so presumably both wells and ponds are performing as expected.
