Yellowstone weather
in August
“Mild and bright — an underrated time to visit.”
Roughly 9 rainy days across the month, on average.
In august, Yellowstone settles into its kind, mild rhythm. The city keeps a different pulse than in summer or midwinter, and travellers who arrive with the right expectations are rewarded.
Days average around 21°C (70°F), cooling to 9°C after sunset. Rainfall is moderate — around 9 rainy days spread through the month. Long days of sunshine reward early starts.
These figures are climatological averages, drawn from a decade of daily records via the Open-Meteo Archive — not a forecast. But they are honest, and they are the sort of thing a good travel guide ought to tell you before you book the flight.
What to pack for Yellowstone in August
- •A light layer for cool mornings and evenings
- •Layers, because the day changes
- •A merino base layer for the cold evenings
- •Reef-safe sunscreen and polarised sunglasses
- •Comfortable, broken-in walking shoes
- •A small daypack that won't look like a tourist beacon
What to pack for Yellowstone in August
- →Breathable travel pantsAmazon · shop this
- →Compact travel umbrellaAmazon · shop this
- →Reef-safe sunscreen SPF 50Amazon · shop this
- →Polarized sunglassesAmazon · shop this
- →Universal travel adapterAmazon · shop this
- →Compression packing cubesAmazon · shop this
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Where to stay in Yellowstone
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Yellowstone in August — FAQ
Q01Is August a good time to visit Yellowstone?
Is August a good time to visit Yellowstone?
Yes — this is one of the best months of the year to visit. In August, Yellowstone averages a high of 21°C (70°F) and a low of 9°C (47°F), with 44mm of rainfall across roughly 9 rainy days.
Q02What is the average temperature in Yellowstone in August?
What is the average temperature in Yellowstone in August?
The average high temperature in Yellowstone during August is 21°C (70°F), with an average low of 9°C (47°F). These figures are averaged from ten years of daily records (2015–2024, Open-Meteo Archive).
Q03How many rainy days does Yellowstone have in August?
How many rainy days does Yellowstone have in August?
Yellowstone averages approximately 9 rainy days in August, with a total monthly rainfall of about 44mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days.
Q04What should I pack for Yellowstone in August?
What should I pack for Yellowstone in August?
For Yellowstone in August, pack layered clothing for changing temperatures, a merino base layer for evenings, sunscreen and sunglasses, comfortable walking shoes. These recommendations are based on the ten-year weather averages for this specific month.
Q05How crowded is Yellowstone in August?
How crowded is Yellowstone in August?
Tourist crowds in Yellowstone during August are typically moderate. Consider this when planning accommodation — prices track crowd levels closely.