How extreme does West Yellowstone's weather get?

The hottest, coldest, wettest and snowiest days West Yellowstone has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 25 years of daily weather observations (2001–present), from the Hebgen Lake Montana station. Updated through May 2026 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days West Yellowstone has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

97°F Jul 13, 2002

That is about 15°F hotter than a normal July afternoon in West Yellowstone (typical high near 82°F).

The three most extreme on record

1 97°F Jul 13, 2002

2 97°F Aug 14, 2003

3 96°F Jul 12, 2002

❄️ Coldest night

-45°F Feb 6, 2014

The three most extreme on record

1 -45°F Feb 6, 2014

2 -45°F Dec 22, 2022

3 -42°F Jan 30, 2023

In plain terms

In a normal year, West Yellowstone's warmest days reach the low 80s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 97°F and as low as −45°F. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 22 years of daily observations at West Yellowstone, a weather station, about 1 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →

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