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Yellowstone National Park (WY)
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Weather in Yellowstone National Park, Wyoming for May 2026

Your guide to Yellowstone National Park weather in May - trends and predictions

    Snow Forecast ❄️

  • Expect heavy snowfall in Yellowstone National Park during May, with an average of 20 snowy days.
    According to Yellowstone National Park snow forecast for May 2026, 5 snowy days are expected in the next 2 weeks. The closest date with snow is Wednesday, May 6.

    • Temperatures

  • The forecast for the upcoming days in Yellowstone National Park predicts a temperature of 12.4 °F, which is slightly above the historical average.

  • In general, the average temperature in Yellowstone National Park at the beginning of May is 8.9 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 13.4 °F by the end of May.

    • More

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

Average dry days
5
Dry days
Average rainy days
6
Rainy days
Average snowy days
20
Snow days
Average temperatures
9°/-2°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Yellowstone National Park Weather May

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

Temperatures trend during May in Yellowstone National Park

See the weather trend as well as the moving average line

May weather in Yellowstone National Park day by day

Click on a date for more information
April June
Date Weather Temperatures Rain Snow More
May 1 Moderate or heavy snow with thunder
Moderate or heavy snow with thunder
 6° /-6° 2.8 mm 1.9 cm
May 2 Moderate or heavy snow showers
Moderate or heavy snow showers
 8° /-8° 0.8 mm 0.5 cm
May 3 Moderate or heavy snow showers
Moderate or heavy snow showers
 10° /-5° 0.6 mm 0.3 cm
May 4 Overcast
Overcast
 11° /-4° 1.7 mm 0 cm
May 5 Patchy light rain with thunder
Patchy light rain with thunder
 6° /-3° 6.3 mm 2.8 cm
May 6 Patchy rain possible
Patchy rain possible
 10° /-5° 0.3 mm 0.1 cm
May 7 Patchy rain possible
Patchy rain possible
 11° /1° 3.9 mm 1.1 cm
May 8 Patchy rain possible
Patchy rain possible
 13° /0° 0.3 mm 0 cm
May 9 Patchy rain possible
Patchy rain possible
 8° /0° 2.7 mm 0.9 cm
May 10 Sunny
Sunny
 14° /-2° 0 mm 0 cm
May 11 Sunny
Sunny
 16° /2° 0 mm 0 cm
May 12 Sunny
Sunny
 18° /2° 0 mm 0 cm
May 13 Patchy rain possible
Patchy rain possible
 19° /4° 0.3 mm 0 cm
May 14 Patchy rain possible
Patchy rain possible
 10° /6° 2.3 mm 0 cm
May 15 Patchy rain possible
Patchy rain possible
 8° /2° 0.9 mm 0 cm
May 16 Sunny
Sunny
 11° /-2° 0 mm 0 cm
May 17 Patchy rain possible
Patchy rain possible
 11° /0° 2 mm 0 cm
May 18 Patchy rain possible
Patchy rain possible
 13° /0° 1.9 mm 0 cm
May 19 Patchy rain possible
Patchy rain possible
 11° /0° 1.3 mm 0 cm
May 20 Overcast
Overcast
 6° /-2° 9 mm 3.4 cm
May 21 Moderate or heavy snow with thunder
Moderate or heavy snow with thunder
 6° /-3° 9.1 mm 6.2 cm
May 22 Moderate or heavy snow with thunder
Moderate or heavy snow with thunder
 8° /-4° 2.9 mm 1.7 cm
May 23 Moderate or heavy snow with thunder
Moderate or heavy snow with thunder
 7° /-4° 3 mm 2.1 cm
May 24 Patchy light snow with thunder
Patchy light snow with thunder
 10° /-3° 0.4 mm 0 cm
May 25 Moderate or heavy snow with thunder
Moderate or heavy snow with thunder
 9° /-3° 2.7 mm 0.9 cm
May 26 Patchy light snow with thunder
Patchy light snow with thunder
 11° /-1° 4.7 mm 0.9 cm
May 27 Mist
Mist
 13° /-2° 2.9 mm 0 cm
May 28 Partly cloudy
Partly cloudy
 16° /2° 0.4 mm 0 cm
May 29 Patchy light rain with thunder
Patchy light rain with thunder
 15° /2° 2.2 mm 0 cm
May 30 Patchy moderate snow
Patchy moderate snow
 13° /3° 0.6 mm 0.2 cm
May 31 Sunny
Sunny
 17° /1° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Yellowstone National Park 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 Yellowstone National Park forecast closer to your planned date for the most up-to-date weather information.
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Yellowstone National Park in May - FAQ

What are the expected maximum and minimum temperatures in Yellowstone National Park during May?

Prepare for cooler days with highs just around 9° and colder nights, dipping below -2°.

How much rainfall should be expected in Yellowstone National Park during May?

Significant rainfall exceeding 151.3 mm is expected in Yellowstone National Park during May, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Yellowstone National Park in May 2026?

Yellowstone National Park experiences an average snowfall of 68.375 cm during May, occurring over 20 days.

What are the typical wind conditions in Yellowstone National Park during May?

The average wind speed in Yellowstone National Park during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

Yellowstone National Park snow forecast May 2026

Track daily snowfall levels and discover Yellowstone National Park’s snowy potential this May ❄️
On average, Yellowstone National Park sees 20 snowy days during May, with approximately 68.4 cm of total snowfall.

May rainfall patterns in Yellowstone National Park

Explore the daily rainfall trends and prepare for Yellowstone National Parks May weather 💧
Typically, Yellowstone National Park has 6 rainy days in May with a total of 151.3 mm of rainfall.

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Location coordinates Where is Yellowstone National Park?

Get accurate weather forecasts for Yellowstone National Park, located at latitude 44.428 and longitude -110.588. Stay updated with localized weather information tailored for Yellowstone National Park.

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