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United StatesThe weather in May in Yellowstone National Park
It's cool in May in Yellowstone National Park with an average temperature of 11°C. Temperatures this month range from a low of 7°C to a high of 16°C. At night, you can expect temperatures between -5°C and 1°C.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Yellowstone National Park, Wyoming. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 24°C in 2020, Yellowstone National Park reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was -3°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of -15°C to a highest value of 6°C.
Precipitation and snowfall
In May, there is an average of 62 mm of precipitation, spread over 10 days. Of the total precipitation, about 12 cm falls as snow in May. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in May for Yellowstone National Park
Click on any day in May to get detailed info about the usual weather on that day in Yellowstone National Park. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| Yellowstone National Park | New York | |
|---|---|---|
| Average temperature | 11°C | 22°C |
| Max. temperature | 16°C | 28°C |
| Min. temperature | -5°C | -5°C |
| Total precipitation | 62 mm | 105 mm |
| Rainy days | 10 days | 14 days |
| Total snowfall | 12 cm | 0 cm |
| Snowy days | 6 days | 0 days |
Start of May
The month of May starts in Yellowstone National Park with cold temps, averaging around 10°C during the day and nights around -3°C.
Mid May
By mid-May, daytime temps rise to around 12°C, with nights around -1°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of May
By the end of May, the average daytime temperature in Yellowstone National Park is around 13°C, while nighttime temps are about 0°C. A shower might pop up, but overall, the weather will be dry and sunny.
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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.
Check out the climate of Yellowstone National Park for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in Yellowstone National Park, Wyoming. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in Yellowstone National Park
Temperature in May in Yellowstone National Park over the years
Precipitation charts
These charts show the average amount of precipitation in May in Yellowstone National Park, Wyoming. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in Yellowstone National Park
Total precipitation in May in Yellowstone National Park over the years
Daily Snowfall in May in Yellowstone National Park
Snowfall in May in Yellowstone National Park per year
Daily UV index in May in Yellowstone National Park
This chart shows the average daily UV index in May in Yellowstone 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.
Weather experiences in May in Yellowstone National Park
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Average weather in Yellowstone National Park by month
Click on a month below to see detailed weather info for Yellowstone National Park. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.