Mount Rainier National Park climate and temperatures

The climate of Mount Rainier National Park is Mediterranean (Köppen: Csb), with dry, mild summers and cool winters. Monthly temperatures range from a minimum of 5°C in winter (December–February) to a maximum of 25°C in summer (June–August). The average annual temperature is around 15°C.

During the winter months, nighttime temperatures can drop to an average of -1°C, while summer nights average around 12°C.

Climate table of Mount Rainier National Park

The climate table below gives you a clear overview of the climate in Mount Rainier National Park by month, from average temperatures and rainfall to UV levels. This makes it easy to see when the weather best suits your travel plans.

Best time to visit Mount Rainier National Park

The best time to visit Mount Rainier National Park is July. During this period, temperatures are usually pleasant to warm and there is relatively little rainfall. Especially in July, the climate is favorable, with an average high temperature of 24°C and around 18 mm of rainfall. For a city trip, round trip, or active holiday, July are often more comfortable, as it is warm without the heat becoming too intense. The warmest month is August, with an average daytime temperature of around 25°C. The driest month is July, with about 18 mm of rainfall, while January is usually the wettest month of the year, with approximately 363 mm. Snow is rare here, but may occasionally fall in May, January, February, March, April, October, November en December.

Average temperature per month

This chart shows the average daytime (maximum) and nighttime (minimum) temperatures per month in Mount Rainier National Park. The figures are based on climate data from recent years and are presented in degrees Celsius, so you can clearly see the temperature range for each month.

Average rainfall per month

This chart shows the average monthly rainfall in Mount Rainier National Park. The figures are based on long-term climate data and are displayed in millimeters, so you can immediately see which months are drier or wetter.

Average UV index per month

This chart shows the average monthly sun intensity in Mount Rainier National Park. The UV index ranges from 0 (no UV radiation) to 11+ (extreme). A higher UV index means you can burn more quickly, making proper sun protection increasingly important.

Average annual temperature

This chart shows the average annual temperature in Mount Rainier National Park based on data from the past ten years. It allows you to see at a glance how the climate is evolving and whether there are clear warming trends.

Average annual rainfall

This chart shows the average annual rainfall in Mount Rainier National Park over the past ten years. It allows you to see at a glance how much rain falls each year and whether there are clear fluctuations between the years.

Weather experiences in Mount Rainier National Park

The weather in Mount Rainier National Park is rated an average of 4.3 out of 5 stars by 8 visitors. Have you been to Mount Rainier National Park? Share your experience with the weather to help other visitors plan their trip.

Average weather per month

Click on a month below and discover what the weather in Mount Rainier National Park is typically like. For each period, you can instantly see the average temperature, rainfall, wind, and UV index. Thanks to years of historical weather data, you’ll know exactly what to expect during your trip.

• January
• February
• March
• April
• May
• June
• July
• August
• September
• October
• November
• December