Ten Sleep, WY climate
Ten Sleep has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 89°, a January night drops to 9°, and about 52 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Ten Sleep feels like
Winter
Spring
Summer
Fall
Ten Sleep weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 35° | 9° | 0.4" | 9.0" | 6 | 23 | 15° – 30° |
| February | 38° | 13° | 0.4" | 9.5" | 6 | 19 | 16° – 34° |
| March | 50° | 23° | 0.7" | 5.7" | 6 | 7 | 29° – 43° |
| April | 58° | 31° | 1.2" | 5.4" | 8 | 1 | 39° – 49° |
| May | 68° | 40° | 2.0" | 1.1" | 9 | 0 | 49° – 59° |
| June | 79° | 48° | 1.4" | 0 | 8 | 0 | 57° – 70° |
| July | 89° | 55° | 0.8" | 0 | 6 | 0 | 64° – 77° |
| August | 87° | 53° | 0.6" | 0 | 5 | 0 | 65° – 74° |
| September | 75° | 43° | 1.2" | 0.3" | 6 | 0 | 54° – 65° |
| October | 60° | 31° | 1.1" | 3.5" | 7 | 1 | 36° – 51° |
| November | 46° | 20° | 0.5" | 7.6" | 6 | 8 | 22° – 43° |
| December | 35° | 10° | 0.4" | 9.5" | 6 | 20 | 13° – 28° |
| Year | 60° | 31° | 10.7" | 51.6" | 78 | 79 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Ten Sleep
Ten Sleep gets 11 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 78 days a year. Snow covers the ground about 79 days of the year.
About 141 frost-free days a year
In half of years the last 32° night comes by May 10 and the first one by October 1. That leaves about 141 frost-free days for gardens, shorter than 88% of U.S. towns.
Heating and cooling a home in Ten Sleep
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Ten Sleep, 92% of that work is heating and 8% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Ten Sleep compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Ten Sleep averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.6°). The shift is larger than in 55% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Ten Sleep’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 22° to 43°. August is the most reliable, staying within 9°.
Common questions about Ten Sleep’s climate
What is the coldest month in Ten Sleep?
January, with a typical high of 35° and a low of 9°.
What is the hottest month in Ten Sleep?
July, with a typical high of 89° and a low of 55°. About 34 days a year reach 90°.
How much snow does Ten Sleep get?
About 52 inches in a normal winter, most of it in February.
When is the first frost in Ten Sleep?
In half of years the first 32° night comes by October 1, and the last spring frost by May 10.
What is the rainiest month in Ten Sleep?
May, with 2.0 inches of rain and melted snow. The year totals 11 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Ten Sleep itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Tensleep 4ne, WY (4 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.