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In terms of precipitation, rainfall in Des Moines ranges from 1.0 - 4.9 inches per month. June is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Des Moines when rainfall is around 1.0 in.
If weather is an important factor for your trip to Des Moines, 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 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).