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In terms of precipitation, rainfall in Río Gallegos ranges from 0.4 - 1.2 inches per month. January is typically the wettest month, when rainfall can reach 1.2 in. June is typically the driest time to visit Río Gallegos when rainfall is around 0.4 in.
If weather is an important factor for your trip to Río Gallegos, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 57.2 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 33.8 F).