Ketchum, OK climate
Ketchum has chilly winters and warm summers. A typical July afternoon reaches 92°, a January night drops to 26°, and about 6 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Ketchum feels like
Winter
Spring
Summer
Fall
Ketchum 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 | 48° | 26° | 2.2" | 1.7" | 6 | 1 | 32° – 48° |
| February | 53° | 30° | 2.1" | 0.8" | 6 | 1 | 33° – 49° |
| March | 62° | 39° | 3.5" | 1.8" | 8 | 0 | 44° – 59° |
| April | 71° | 47° | 4.6" | 0 | 9 | 0 | 52° – 67° |
| May | 79° | 57° | 6.5" | 0 | 10 | 0 | 64° – 73° |
| June | 87° | 66° | 4.9" | 0 | 9 | 0 | 73° – 82° |
| July | 92° | 70° | 3.9" | 0 | 7 | 0 | 76° – 88° |
| August | 91° | 69° | 3.5" | 0 | 6 | 0 | 74° – 85° |
| September | 83° | 60° | 4.3" | 0 | 7 | 0 | 68° – 79° |
| October | 72° | 48° | 4.2" | 0 | 8 | 0 | 54° – 66° |
| November | 60° | 38° | 3.4" | 0.3" | 7 | 0 | 42° – 57° |
| December | 50° | 30° | 2.5" | 0.9" | 6 | 1 | 27° – 46° |
| Year | 71° | 48° | 45.7" | 5.5" | 89 | 4 |
“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 Ketchum
Ketchum gets 46 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 89 days a year.
About 209 frost-free days a year
In half of years the last 32° night comes by April 7 and the first one by November 2. That leaves about 209 frost-free days for gardens, longer than 78% of U.S. towns.
Heating and cooling a home in Ketchum
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Ketchum, 67% of that work is heating and 33% is cooling.
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.
Ketchum and its neighbors
Ketchum borders 2 towns with climate data. January nights across them vary by 0.0°. Langley has both the coldest January nights (26°) and the hottest July afternoons (92°). Ketchum’s January low is 26° and its July high 92°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Ketchum 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 Ketchum averaged 0.4° warmer than the 1900s. The biggest change is in March (+1.5°). The shift is smaller than in 99% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Ketchum’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 27° to 46°. May is the most reliable, staying within 9°.
Common questions about Ketchum’s climate
What is the coldest month in Ketchum?
January, with a typical high of 48° and a low of 26°.
What is the hottest month in Ketchum?
July, with a typical high of 92° and a low of 70°. About 58 days a year reach 90°.
How much snow does Ketchum get?
About 6 inches in a normal winter, most of it in March.
When is the first frost in Ketchum?
In half of years the first 32° night comes by November 2, and the last spring frost by April 7.
What is the rainiest month in Ketchum?
May, with 6.5 inches of rain and melted snow. The year totals 46 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Ketchum itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Spavinaw, OK (10 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.