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In terms of precipitation, rainfall in Whyalla ranges from 0.4 - 0.8 inches per month. February is typically the wettest month, when rainfall can reach 0.8 in. January is typically the driest time to visit Whyalla when rainfall is around 0.4 in.
If weather is an important factor for your trip to Whyalla, 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 73.4 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 53.6 F).