In terms of precipitation, rainfall in Johnstown ranges from 61.0 - 114.0 mm per month. May is typically the wettest month, when rainfall can reach 114.0 mm. February is typically the driest time to visit Johnstown when rainfall is around 61.0 mm.
If weather is an important factor for your trip to Johnstown, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -4.0 C).
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