Your nature year
Cheyenne, Wyomingthrough the year
When do frost, green-up and fall color come to Cheyenne?
Expect about 140 frost-free days in Cheyenne: the last spring frost usually comes around May 14, the first fall one around Oct 1, going by NOAA's Cheyenne Wfo station 1.8 miles away. Leaves usually come out around Apr 7 and the first flowers around May 20.
Spring takes about 6 weeks to go from leaf to bloom. We follow 3 places within 150 miles of Cheyenne; the nearest lies 64 miles to the southwest. For a day trip, Rocky Mountain is 64 miles off; its fall foliage is September and October (local timing). For wildflowers, the nearest is Crescent Lake Refuge (129 mi, bloom in June (local timing)).
Updated Sep 27. Sources: US Census Bureau, 2024 Gazetteer (places) ↗ (opens in a new tab), US Census Bureau, city and town population estimates, 2024 ↗ (opens in a new tab), NOAA NCEI U.S. Climate Normals 1991–2020 (annual/seasonal) ↗ (opens in a new tab)
Cheyenne's year at a glance
- Frost possible
- Frost-free, ~May 14 to ~Oct 1
- First leaf ~Apr 7
- First bloom ~May 20
- Today
Near Cheyenne right now
- First fall frost usually around Oct 1 · last spring frost around May 14NOAA 1991–2020 normals, Cheyenne Wfo (1.8 mi, 50% dates)~2 days
- Rocky Mountain · 64 mi · Local timing: September and OctoberFall foliage · in its window now
- Guanella Pass · 117 mi · Regional timing: by SeptemberFall foliage · in its window now
- Wildflowers · Crescent Lake Refuge · 129 miLocal timing: bloom in June~8 months
Cheyenne's nature year
- Apr: Spring green-upApr
- May: Last spring frostMay
- Jun: Wildflowers · Crescent Lake RefugeJun
- Fall foliage · Rocky MountainNowSep–Oct
- Oct: First fall frostOct
Nearby, season by season
Fall foliage
- Rocky Mountain · 64 miLocal timing: September and October
- Guanella Pass · 117 miRegional timing: by September
Wildflowers
- Crescent Lake Refuge · 129 miLocal timing: bloom in June~8 months
Snow in Cheyenne
Snow usually becomes possible around Oct 20 (our calculation from NOAA's daily snow chances: the first day the chance of 0.1" or more of snow reaches 10%). NOAA's normals at Cheyenne Wfo (1.8 mi away): 66 inches of snow in an average year, about 19.3 days with 1 inch or more.
NOAA's chance of at least 0.1 inch of snow on each date (one value per week, September to May), averaged over 1991–2020. A typical year, not a forecast.
Frost and green-up
Last spring frost
May 14
Average (50% date)
First fall frost
Oct 1
About 140 days without frost between
Spring green-up
Apr 7
First bloom around May 20
Frost: NOAA 1991–2020 climate normals at Cheyenne Wfo (1.8 mi from Cheyenne), the day a 32 °F night is as likely as not. Green-up: the USA-NPN Spring Index, 1991–2020 average at the town.
Questions people ask
When is the first frost in Cheyenne?
On average around Oct 1, and the last spring frost around May 14: about 140 days without frost between. These are NOAA's 1991–2020 normals at Cheyenne Wfo, 1.8 miles away (the day a 32 °F night is as likely as not).
When does spring green-up reach Cheyenne?
The USA-NPN Spring Index puts first leaf around Apr 7 and first bloom around May 20, on average for 1991–2020 at the town.
Where can I see fall foliage near Cheyenne?
Rocky Mountain, 64 miles (local timing: September and October); Guanella Pass, 117 miles (regional timing: by September). Distances are straight-line.
Where can I see wildflowers near Cheyenne?
Crescent Lake Refuge, 129 miles (local timing: bloom in June). Distances are straight-line.
When does it start snowing in Cheyenne?
Snow usually becomes possible around Oct 20: our calculation from NOAA's daily snow chances: the first day the chance of 0.1" or more of snow reaches 10%, at Cheyenne Wfo. An average year brings 66 inches (NOAA 1991–2020). A typical year, not a forecast.Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (annual/seasonal snowfall) ↗ (opens in a new tab), NOAA NCEI U.S. Climate Normals 1991–2020 (daily snowfall probabilities) ↗ (opens in a new tab)
How we know
US Census Bureau, 2024 Gazetteer (places) (opens in a new tab) (Sep 27) · US Census Bureau, city and town population estimates, 2024 (opens in a new tab) (Sep 27) · NOAA NCEI U.S. Climate Normals 1991–2020 (annual/seasonal) (opens in a new tab) (Sep 27) · USA National Phenology Network, Spring Index 1991–2020 averages (opens in a new tab) (Sep 27)