Cornish reaches 100° on about 20 days a year, more than 95% of U.S. towns
The depth of winter brings overnight lows near 30°. The gap between a January night and a July afternoon is 66°. It is a dry place: less rain and snow fall here than on 74% of U.S. towns. Central heating does most of its work from December to February, in months below 50° on average.
A year in Cornish at a glance
Each month’s typical high and low, and what it brings.
What stands out about Cornish’s climate
Compared with towns across the U.S., with Cornish’s place in Oklahoma beside it.
What a year in Cornish feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 226 frost-free days a year
In half of years the last 32° night comes by March 23 and the first by November 7. Frost and day counts come from NOAA’s station at Ringling 1n Mesonet, OK, 2.1 miles from the town’s center, at about the same height.
The 2023 USDA map puts Cornish’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 12°. 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 2 inches of snow a winter
Snow, measured at Grady 2e, OK, falls mostly in February. Precipitation (rain plus melted snow) adds up to 36 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 55 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Cornish
56% 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 Ringling 1n Mesonet, OK.
Living with Cornish’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
226 frost-free days in zone 8a. The last frost comes by Mar 23 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 7.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November.
Parks & trails →Of the yearly building losses FEMA expects in Cornish from natural hazards, tornadoes are the largest share (23%); heat waves, cold waves, winter storms and ice storms together are 15%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Cornish and similar climates
TownRatings has no climate map of the towns around Cornish yet.
Climates most like Cornish’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 |
|---|---|---|---|---|
| Cornish, OK | 30° | 95° | 36" | 1.8" |
| Gatesville, TX | 35° | 96° | 35" | 0.2" |
| Oakhurst, CA | 34° | 95° | 29" | 2.5" |
| Arkansas City, KS | 23° | 93° | 37" | 6.2" |
| Seven Oaks, SC | 34° | 93° | 45" | 1.2" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
About as warm as it used to be
The last 30 years in Cornish averaged 0.3° warmer than the 1900s. The biggest change is in January (+1.4°).
A smaller shift than in all but 47 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 Cornish compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Cornish’s place among Oklahoma’s.
Cornish weather by month
Highs, lows and precipitation from NOAA’s grid at Cornish’s center; snow, wet days and snow on the ground from Grady 2e, OK. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 54° | 30° | 1.7" | 0.0" | 4 | 0 | 38° – 50° |
| February | 58° | 34° | 2.0" | 0.9" | 4 | 0 | 39° – 54° |
| March | 66° | 43° | 2.8" | 0.1" | 5 | 0 | 48° – 62° |
| April | 75° | 50° | 3.4" | 0.0" | 5 | 0 | 57° – 69° |
| May | 82° | 59° | 5.2" | 0.0" | 7 | 0 | 67° – 76° |
| June | 90° | 68° | 4.1" | 0.0" | 6 | 0 | 75° – 86° |
| July | 95° | 72° | 2.6" | 0.0" | 3 | 0 | 79° – 91° |
| August | 95° | 71° | 2.7" | 0.0" | 4 | 0 | 77° – 91° |
| September | 87° | 63° | 3.5" | 0.0" | 5 | 0 | 71° – 82° |
| October | 76° | 51° | 3.6" | 0.0" | 5 | 0 | 58° – 69° |
| November | 64° | 40° | 2.4" | 0.0" | 4 | 0 | 47° – 58° |
| December | 55° | 32° | 2.2" | 0.8" | 4 | 1 | 36° – 48° |
| Year | 75° | 51° | 36.2" | 1.8" | 55 | 1 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 39° to 54°. May is the most reliable, staying within 9°.
Where Cornish’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 Cornish’s center.
- Snow: Grady 2e, OK.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Ringling 1n Mesonet, OK, 2.1 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 Cornish’s climate
What is the weather like in Cornish?
A typical July afternoon reaches 95°, a January night drops to 30°, and about 2 inches of snow falls in a normal winter. Milder January nights than 72% of U.S. towns; hotter July afternoons than 95% of U.S. towns.
How cold does it get in Cornish in winter?
January nights average 30°. About 62 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 38°.
How much snow does Cornish get?
About 1.8 inches in a normal winter at Grady 2e, OK, most of it in February, with snow on the ground about 1 days a year.
How hot does it get in Cornish?
July, with a typical high of 95° and a low of 72°. About 93 days a year reach 90° and 20 reach 100° (Ringling 1n Mesonet, OK).
When is the first and last frost in Cornish?
In half of years the last spring frost (32°) comes by March 23 and the first fall frost by November 7, about 226 frost-free days, at Ringling 1n Mesonet, OK.
What growing zone is Cornish in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 12°.
What is the best time of year to visit Cornish?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Cornish getting warmer?
Yes: 1991–2020 averaged 0.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than all but 47 U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Cornish.
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.