Temperatures in August
It's warm in August in Mount Rainier National Park with an average temperature of 25°C. Temperatures this month range from a low of 20°C to a high of 27°C. At night, you can expect temperatures between 11°C and 14°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Mount Rainier National Park in August. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of August
The month of August starts in Mount Rainier National Park with warm temperatures, averaging around 26°C during the day and nights close to 14°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-August
By mid-August, the average daytime temperature stays the same at 26°C, with nights close to 14°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
Temperatures vary between day and night, so it’s smart to wear layers.
End of August
By the end of August, the average daytime temperature in Mount Rainier National Park will be around 24°C, with nights close to 12°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in August
In August, there is an average of 61 mm of precipitation, spread over 5 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
The precipitation chance averages 16% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for Mount Rainier National Park. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Mount Rainier National Park in August |
UK | ||
|---|---|---|---|
 Average Temperature |
25°C | 22°C | |
 High Temp |
27°C | 24°C | |
| Low Temp |
20°C | 19°C | |
 Total Precipitation |
61 mm | 60 mm | |
| Rainy Days |
5 days | 10 days | |
July
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is August a good time to visit Mount Rainier National Park?
Want nice weather? Then August is a great time to be in Mount Rainier National Park. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Mount Rainier National Park in August
With 36°C, Mount Rainier National Park hit the highest temperature in the last 10 years in August 2023. The lowest daytime temperature in this month was 13°C in 2018. The extreme night temperatures ranged from a low of 6°C to a high of 22°C.
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Daily Temperature in August in Mount Rainier National Park
This chart shows the average daily temperatures, both day and night, for each day in August in Mount Rainier National Park, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in August in Mount Rainier National Park
The chart below shows the average daily precipitation in August for Mount Rainier National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect around 5 days of rain in Mount Rainier National Park.
Daily UV Index in August in Mount Rainier National Park
This chart shows the average daily UV index in August in Mount Rainier National Park, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in Mount Rainier National Park Over the Years
This chart shows the average temperature in August in Mount Rainier National Park, measured in degrees Celsius, over the past years.
Total Precipitation in August in Mount Rainier National Park Over the Years
This chart shows the average precipitation in August in Mount Rainier National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for Mount Rainier National Park
Click on a specific day in August for detailed info on the typical weather on that day in Mount Rainier National Park. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Mount Rainier National Park
Have you been to Mount Rainier National Park in August?
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Average Weather in Mount Rainier National Park by Month
Click on a month below to see detailed weather info for Mount Rainier National Park. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Mount Rainier National Park for all months at once
