In terms of precipitation, rainfall in Yellowstone National Park ranges from 30.0 - 50.0 mm per month. January is typically the wettest month, when rainfall can reach 50.0 mm. April is typically the driest time to visit Yellowstone National Park when rainfall is around 30.0 mm.
If weather is an important factor for your trip to Yellowstone National Park, 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 16.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around -9.0 C).
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