Yellowstone National Park (WY)
May
Weather in Yellowstone National Park, Wyoming for May 2026
Your guide to Yellowstone National Park weather in May - trends and predictions
Expect heavy snowfall in Yellowstone National Park during May, with an average of 18 snowy days.
In general, the average temperature in Yellowstone National Park at the beginning of May is 6.3 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 13.4 °F by the end of May.
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Snow Forecast ❄️
Temperatures
More
10
Dry days
3
Rainy days
18
Snow days
7°/-3°
Temperatures
23 km/h
Avg max wind
74 %
Avg humidity
Yellowstone National Park Weather May
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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
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| May 1 |  Moderate or heavy snow with thunder | 4° /-7° | 4.3 mm | 2.9 cm | |
| May 2 |  Moderate or heavy snow showers | 6° /-11° | 1.1 mm | 0.7 cm | |
| May 3 | Moderate or heavy snow showers | 8° /-8° | 0.9 mm | 0.4 cm | |
| May 4 |  Overcast | 11° /-6° | 2.5 mm | 0 cm | |
| May 5 |  Patchy light rain with thunder | 6° /-3° | 6.3 mm | 2.8 cm | |
| May 6 | Moderate or heavy snow with thunder | 3° /-5° | 3.9 mm | 1.4 cm | |
| May 7 | Moderate or heavy snow showers | 6° /-5° | 1.5 mm | 0.6 cm | |
| May 8 | Moderate or heavy snow with thunder | 8° /-4° | 3.5 mm | 2.5 cm | |
| May 9 |  Patchy moderate snow | 11° /-5° | 0.2 mm | 0.1 cm | |
| May 10 |  Mist | 14° /-3° | 0 mm | 0 cm | |
| May 11 |  Patchy rain possible | 13° /1° | 11.9 mm | 0 cm | |
| May 12 | Patchy rain possible | 14° /0° | 2.2 mm | 0.1 cm | |
| May 13 | Patchy light rain with thunder | 11° /1° | 8.3 mm | 3.5 cm | |
| May 14 | Moderate or heavy snow with thunder | 6° /0° | 40 mm | 26.5 cm | |
| May 15 | Patchy light rain with thunder | 7° /-1° | 5.5 mm | 2.6 cm | |
| May 16 |  Partly cloudy | 9° /-1° | 8.8 mm | 2.7 cm | |
| May 17 | Patchy rain possible | 11° /-1° | 3.1 mm | 0 cm | |
| May 18 |  Sunny | 6° /-3° | 9 mm | 6 cm | |
| May 19 |  Light freezing rain | 6° /-2° | 0.4 mm | 0.2 cm | |
| May 20 | Overcast | 6° /-2° | 9 mm | 3.4 cm | |
| May 21 | Moderate or heavy snow with thunder | 6° /-3° | 9.1 mm | 6.2 cm | |
| May 22 | Moderate or heavy snow with thunder | 8° /-4° | 2.9 mm | 1.7 cm | |
| May 23 | Moderate or heavy snow with thunder | 7° /-4° | 3 mm | 2.1 cm | |
| May 24 |  Patchy light snow with thunder | 10° /-3° | 0.4 mm | 0 cm | |
| May 25 | Moderate or heavy snow with thunder | 9° /-3° | 2.7 mm | 0.9 cm | |
| May 26 | Patchy light snow with thunder | 11° /-1° | 4.7 mm | 0.9 cm | |
| May 27 | Mist | 13° /-2° | 2.9 mm | 0 cm | |
| May 28 | Partly cloudy | 16° /2° | 0.4 mm | 0 cm | |
| May 29 | Patchy light rain with thunder | 15° /2° | 2.2 mm | 0 cm | |
| May 30 | Patchy moderate snow | 13° /3° | 0.6 mm | 0.2 cm | |
| May 31 | Sunny | 17° /1° | 0 mm | 0 cm | |
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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 7° and colder nights, dipping below -3°.
How much rainfall should be expected in Yellowstone National Park during May?
Significant rainfall exceeding 113.9 mm is expected in Yellowstone National Park during May, occurring over more than 3 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 50.8 cm during May, occurring over 18 days.
What are the typical wind conditions in Yellowstone National Park during May?
The average wind speed in Yellowstone National Park during May is 23 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 ❄️
May rainfall patterns in Yellowstone National Park
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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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