Isabella reaches 100° on about 22 days a year, more than 96% of U.S. towns
The coldest hours of a January night bottom out at 25° on average. Precipitation peaks in May and eases off in January. Its yearly precipitation falls short of 85% of U.S. towns. The heating season runs November to February: each of those months averages under 50°.
A year in Isabella at a glance
Each month’s typical high and low, and what it brings.
What stands out about Isabella’s climate
Compared with towns across the U.S., with Isabella’s place in Oklahoma beside it.
What a year in Isabella feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 208 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 Okeene, OK, 8 miles from the town’s center, at about the same height.
The 2023 USDA map puts Isabella’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 9 inches of snow a winter
Snow, measured at Orienta 1ssw, OK, falls mostly in December. Precipitation (rain plus melted snow) adds up to 31 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 66 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Isabella
63% 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 Okeene, OK.
Living with Isabella’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
208 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 and October. 1.5 miles of trails are waiting.
Parks & trails →Cold waves are 23% of the yearly building losses FEMA expects in Isabella from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Isabella and similar climates
TownRatings has no climate map of the towns around Isabella yet.
Climates most like Isabella’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 |
|---|---|---|---|---|
| Isabella, OK | 25° | 96° | 31" | 9.1" |
| Burkburnett, TX | 30° | 97° | 30" | 3.1" |
| Salina, KS | 20° | 93° | 31" | 18" |
| Oakhurst, CA | 34° | 95° | 29" | 2.5" |
| Central Point, OR | 32° | 93° | 22" | 3.4" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Isabella averaged 0.7° warmer than the 1900s. The biggest change is in January (+2.2°).
A smaller shift than in 93% of 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 Isabella compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Isabella’s place among Oklahoma’s.
Isabella weather by month
Highs, lows and precipitation from NOAA’s grid at Isabella’s center; snow, wet days and snow on the ground from Orienta 1ssw, OK. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 49° | 25° | 1.0" | 2.2" | 3 | 31° – 45° |
| February | 53° | 28° | 1.3" | 2.1" | 4 | 34° – 48° |
| March | 63° | 37° | 2.3" | 1.6" | 6 | 43° – 59° |
| April | 72° | 45° | 3.0" | 0.0" | 7 | 52° – 65° |
| May | 81° | 56° | 4.5" | 0.0" | 8 | 64° – 77° |
| June | 91° | 66° | 4.3" | 0.0" | 7 | 74° – 85° |
| July | 96° | 71° | 2.9" | 0.0" | 6 | 78° – 91° |
| August | 94° | 69° | 3.4" | 0.0" | 7 | 75° – 88° |
| September | 86° | 60° | 2.4" | 0.0" | 5 | 69° – 80° |
| October | 74° | 48° | 2.9" | 0.1" | 5 | 54° – 66° |
| November | 60° | 36° | 1.6" | 0.2" | 4 | 42° – 55° |
| December | 50° | 27° | 1.4" | 2.9" | 4 | 29° – 42° |
| Year | 72° | 47° | 30.9" | 9.1" | 66 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 43° to 59°. June is the most reliable, staying within 11°.
Where Isabella’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 Isabella’s center.
- Snow: Orienta 1ssw, OK.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Okeene, OK, 8 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 Isabella’s climate
What is the weather like in Isabella?
A typical July afternoon reaches 96°, a January night drops to 25°, and about 9 inches of snow falls in a normal winter. Milder January nights than 62% of U.S. towns; hotter July afternoons than 96% of U.S. towns.
How cold does it get in Isabella in winter?
January nights average 25°. About 88 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 31°.
How much snow does Isabella get?
About 9.1 inches in a normal winter at Orienta 1ssw, OK, most of it in December.
How hot does it get in Isabella?
July, with a typical high of 96° and a low of 71°. About 88 days a year reach 90° and 22 reach 100° (Okeene, OK).
When is the first and last frost in Isabella?
In half of years the last spring frost (32°) comes by April 7 and the first fall frost by November 2, about 208 frost-free days, at Okeene, OK.
What growing zone is Isabella 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 Isabella?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Isabella getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 93% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Isabella.
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.