Photo: TulGuy · CC BY 4.0Ketchum’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 92°, a January night drops to 26°, and about 6 inches of snow falls in a normal winter.
A year in Ketchum at a glance
Each month’s typical high and low, and what it brings.
What stands out about Ketchum’s climate
Compared with towns across the U.S., with Ketchum’s place in Oklahoma beside it.
What a year in Ketchum feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 209 frost-free days a year
In half of years the last 32° night comes by April 7 and the first by November 2. Frost and day counts come from NOAA’s station at Spavinaw, OK, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Ketchum’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 4°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 6 inches of snow a winter
Snow, measured at Spavinaw, OK, falls mostly in January and March. Precipitation (rain plus melted snow) adds up to 46 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 89 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Ketchum
67% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Spavinaw, OK.
Living with Ketchum’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
209 frost-free days in zone 7a. The last frost comes by Apr 7 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 2.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Ketchum from natural hazards, river flooding is the largest share (36%); heat waves, cold waves, winter storms and ice storms together are 37%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Ketchum and its neighbors
Every town next door is within a degree of Ketchum in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Ketchum’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Ketchum, OK | 26° | 92° | 46" | 5.5" |
| Chapel Hill, NC | 29° | 90° | 47" | 2.8" |
| Pocahontas, AR | 28° | 90° | 50" | 6.3" |
| Colonial Heights, VA | 29° | 90° | 47" | 3.5" |
| Poplar Bluff, MO | 26° | 90° | 50" | 5.4" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
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°).
A smaller shift than in all but 117 U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Ketchum compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Ketchum’s place among Oklahoma’s.
Ketchum weather by month
Highs, lows and precipitation from NOAA’s grid at Ketchum’s center; snow, wet days and snow on the ground from Spavinaw, OK. 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" | 0.0" | 9 | 0 | 52° – 67° |
| May | 79° | 57° | 6.5" | 0.0" | 10 | 0 | 64° – 73° |
| June | 87° | 66° | 4.9" | 0.0" | 9 | 0 | 73° – 82° |
| July | 92° | 70° | 3.9" | 0.0" | 7 | 0 | 76° – 88° |
| August | 91° | 69° | 3.5" | 0.0" | 6 | 0 | 74° – 85° |
| September | 83° | 60° | 4.3" | 0.0" | 7 | 0 | 68° – 79° |
| October | 72° | 48° | 4.2" | 0.0" | 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 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 27° to 46°. May is the most reliable, staying within 9°.
Where Ketchum’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Ketchum’s center.
- Snow: Spavinaw, OK.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Spavinaw, OK, 10 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Ketchum’s climate
What is the weather like in Ketchum?
A typical July afternoon reaches 92°, a January night drops to 26°, and about 6 inches of snow falls in a normal winter. Milder January nights than 66% of U.S. towns; hotter July afternoons than 86% of U.S. towns.
How cold does it get in Ketchum in winter?
January nights average 26°. About 69 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 32°.
How much snow does Ketchum get?
About 5.5 inches in a normal winter at Spavinaw, OK, most of it in January and March, with snow on the ground about 4 days a year.
How hot does it get in Ketchum?
July, with a typical high of 92° and a low of 70°. About 58 days a year reach 90° and 6 reach 100° (Spavinaw, OK).
When is the first and last frost in Ketchum?
In half of years the last spring frost (32°) comes by April 7 and the first fall frost by November 2, about 209 frost-free days, at Spavinaw, OK.
What growing zone is Ketchum in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 4°.
What is the best time of year to visit Ketchum?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Ketchum getting warmer?
Yes: 1991–2020 averaged 0.4° warmer than 1901–2000 on NOAA’s grid. A smaller shift than all but 117 U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Ketchum.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.