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Mount Rainier (WA)
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United States weather

Weather in Mount Rainier, Washington for May 2027

Your guide to Mount Rainier weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Mount Rainier at the beginning of May is 21 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °F by the end of May.

    • Rain 🌧️

  • The climate of Mount Rainier in May is notably wet, with an average of 14 rainy days, and a total of 81.7 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
17
Dry days
Average rainy days
14
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/7°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Mount Rainier Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Cloudy
20°
2
Overcast
22°
3
Sunny
25°
4
Sunny
24°
5
Sunny
20°
6
Overcast
18°
7
Overcast
18°
8
Overcast
16°
9
Overcast
20°
10
Partly cloudy
17°
11
Partly cloudy
20°
12
Cloudy
25°
13
Moderate or heavy rain shower
11°
14
Moderate rain at times
14°
15
Moderate or heavy rain shower
10°
16
Moderate or heavy rain shower
10°
17
Patchy rain possible
14°
18
Patchy rain possible
17°
19
Patchy rain possible
13°
20
Patchy rain possible
17°
21
Sunny
23°
22
Sunny
22°
23
Overcast
19°
24
Sunny
20°
25
Moderate rain at times
17°
26
Moderate or heavy rain shower
12°
27
Partly cloudy
21°
28
Sunny
25°
29
Moderate rain at times
15°
30
Patchy rain possible
15°
31
Sunny
20°

Temperatures trend during May in Mount Rainier

See the weather trend as well as the moving average line

May weather in Mount Rainier day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
May 1 Cloudy
Cloudy
 20° /7° 0 mm 7
May 2 Overcast
Overcast
 22° /8° 0.3 mm 5
May 3 Sunny
Sunny
 25° /9° 0 mm 7
May 4 Sunny
Sunny
 24° /9° 0 mm 7
May 5 Sunny
Sunny
 20° /6° 0 mm 7
May 6 Overcast
Overcast
 18° /8° 0 mm 7
May 7 Overcast
Overcast
 18° /6° 0.2 mm 7
May 8 Overcast
Overcast
 16° /6° 0 mm 6
May 9 Overcast
Overcast
 20° /6° 0 mm 6
May 10 Partly cloudy
Partly cloudy
 17° /6° 0 mm 8
May 11 Partly cloudy
Partly cloudy
 20° /7° 0 mm 8
May 12 Cloudy
Cloudy
 25° /7° 1.4 mm 8
May 13 Moderate or heavy rain shower
Moderate or heavy rain shower
 11° /8° 19.8 mm 2
May 14 Moderate rain at times
Moderate rain at times
 14° /7° 6.7 mm 3
May 15 Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /6° 17 mm 2
May 16 Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /4° 17.7 mm 2
May 17 Patchy rain possible
Patchy rain possible
 14° /2° 0.4 mm 7
May 18 Patchy rain possible
Patchy rain possible
 17° /4° 0.7 mm 6
May 19 Patchy rain possible
Patchy rain possible
 13° /6° 1.1 mm 1
May 20 Patchy rain possible
Patchy rain possible
 17° /7° 0.3 mm 4
May 21 Sunny
Sunny
 23° /8° 0 mm 8
May 22 Sunny
Sunny
 22° /9° 0 mm 8
May 23 Overcast
Overcast
 19° /8° 0 mm 8
May 24 Sunny
Sunny
 20° /5° 0 mm 8
May 25 Moderate rain at times
Moderate rain at times
 17° /6° 3.8 mm 5
May 26 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /6° 5.6 mm 1
May 27 Partly cloudy
Partly cloudy
 21° /5° 0 mm 9
May 28 Sunny
Sunny
 25° /9° 0 mm 8
May 29 Moderate rain at times
Moderate rain at times
 15° /6° 6.4 mm 5
May 30 Patchy rain possible
Patchy rain possible
 15° /6° 0.3 mm 8
May 31 Sunny
Sunny
 20° /5° 0 mm 8
Next
Important Notice
Our weather forecast for Mount Rainier in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Mount Rainier forecast closer to your planned date for the most up-to-date weather information.
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Mount Rainier in May - FAQ

What are the expected maximum and minimum temperatures in Mount Rainier during May?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Mount Rainier during May?
Moderate rainfall is anticipated in Mount Rainier during May, with a total of 81.7 mm spread over approximately 14 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Mount Rainier during May?
The average wind speed in Mount Rainier during May is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Mount Rainier

Explore the daily rainfall trends and prepare for Mount Rainiers May weather 💧
Typically, Mount Rainier has 14 rainy days in May with a total of 81.7 mm of rainfall.

UV exposure in Mount Rainier during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️

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Location coordinates Where is Mount Rainier?

Get accurate weather forecasts for Mount Rainier, located at latitude 46.853 and longitude -121.76. Stay updated with localized weather information tailored for Mount Rainier.

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