Yellowstone National Park
United States
America's first national park encompasses a massive volcanic caldera filled with geysers, hot springs, and roaming bison.
Warmest month is July at 23°C on average. Coolest is January at -6°C. Driest reading falls in July with 4 rain days.
Six lead datapoints
- CoffeeWorld Bank PPP baseline$4.50 (~$4.50)PPP price tier 4 / 4
- $6.00 (~$6.00)PPP price tier 4 / 4
- Flight timeMethodology10h from London HeathrowGreat-circle plus routing overhead.
- Flight CO2eDEFRA 2024 factors2,834 kg return from London HeathrowDEFRA 2024 economy factors, includes radiative forcing.
- FCDO advisorygov.uk, snapshot compiled 2026-07-11No specific FCDO warnings against travel.Check the latest FCDO advice before booking.
- Tap waterCDC / WHO guidanceTap water is generally safe to drink.
| Month | Avg high | Swing | Rain days |
|---|---|---|---|
| January | -6° | ±6° | 12 |
| February | -4° | ±6° | 14 |
| March | 1° | ±6° | 13 |
| April | 5° | ±7° | 12 |
| May | 11° | ±7° | 11 |
| June | 17° | ±7° | 8 |
| July | 23° | ±4° | 4 |
| August | 21° | ±5° | 6 |
| September | 17° | ±8° | 6 |
| October | 8° | ±9° | 10 |
| November | 1° | ±7° | 10 |
| December | -4° | ±6° | 12 |
What to do
- Watch Old Faithful erupt
- Admire the Grand Prismatic Spring
- Spot wolves in the Lamar Valley
- Hike the Grand Canyon of the Yellowstone
How we know this
Values are the average of the last ten calendar years of daily readings from Visual Crossing, snapped to the destination cluster. Swing is the p10 to p90 range of daily highs, halved for the ± figure. Rain days count any day with at least 1 mm of precipitation.