Your nature year
Twin Falls, Idahothrough the year
When do frost, green-up and fall color come to Twin Falls?
Within 150 miles we follow 4 places, out to Camas Refuge 147 miles to the northeast. For a day trip, Craters of the Moon is 76 miles off; its wildflowers is usually at its best Jun 1–30.
Deer Flat Refuge (131 mi) is the pick for winter wildlife, Oct 1–Jan 31 (local timing). Frost usually lets go around Apr 30 and comes back around Oct 9, according to NOAA's Twin Falls-Kmvt station, 1.2 miles away: roughly 162 days without it. Leaves usually come out around Mar 25 and the first flowers around May 2. The town is about 3,731 feet above sea level.
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)
Twin Falls's year at a glance
- Frost possible
- Frost-free, ~Apr 30 to ~Oct 9
- First leaf ~Mar 25
- First bloom ~May 2
- Today
Near Twin Falls right now
- First fall frost usually around Oct 9 · last spring frost around Apr 30NOAA 1991–2020 normals, Twin Falls-Kmvt (1.2 mi, 50% dates)~10 days
- Winter wildlife · Deer Flat Refuge · 131 miLocal timing: Oct 1–Jan 31~2 days
Twin Falls's nature year
- Mar: Spring green-upMar
- Spring migration · Bear River RefugeApr–May
- Apr: Last spring frostApr
- Jun: Wildflowers · Craters of the MoonJun
- Oct: First fall frostOct
- Winter wildlife · Deer Flat RefugeOct–Jan
Nearby, season by season
Spring migration
- Bear River Refuge · 143 miLocal timing: early April through mid-May~6 months
- Camas Refuge · 147 miLocal timing: March through mid-May~5 months
Wildflowers
- Craters of the Moon · 76 miusually Jun 1–30~8 months
- Deer Flat Refuge · 131 miLocal timing: Apr 1–May 31~6 months
Winter wildlife
- Deer Flat Refuge · 131 miLocal timing: Oct 1–Jan 31~2 days
Snow in Twin Falls
Snow usually becomes possible around Nov 22 (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 Twin Falls 6 E (6 mi away): 24 inches of snow in an average year, about 8.9 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
Apr 30
Average (50% date)
First fall frost
Oct 9
About 162 days without frost between
Spring green-up
Mar 25
First bloom around May 2
Frost: NOAA 1991–2020 climate normals at Twin Falls-Kmvt (1.2 mi from Twin Falls), 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 Twin Falls?
On average around Oct 9, and the last spring frost around Apr 30: about 162 days without frost between. These are NOAA's 1991–2020 normals at Twin Falls-Kmvt, 1.2 miles away (the day a 32 °F night is as likely as not).
When does spring green-up reach Twin Falls?
The USA-NPN Spring Index puts first leaf around Mar 25 and first bloom around May 2, on average for 1991–2020 at the town.
Where can I see spring migration near Twin Falls?
Bear River Refuge, 143 miles (local timing: early April through mid-May); Camas Refuge, 147 miles (local timing: March through mid-May). Distances are straight-line.
Where can I see wildflowers near Twin Falls?
Craters of the Moon, 76 miles (usually Jun 1–30); Deer Flat Refuge, 131 miles (local timing: Apr 1–May 31). Distances are straight-line.
When does it start snowing in Twin Falls?
Snow usually becomes possible around Nov 22: our calculation from NOAA's daily snow chances: the first day the chance of 0.1" or more of snow reaches 10%, at Twin Falls 6 E. An average year brings 24 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)