Winchester reaches 100° on about 14 days a year, more than 93% of U.S. towns
A typical July afternoon reaches 92°, a January night drops to 28°, and about 7 inches of snow falls in a normal winter.
A year in Winchester at a glance
Each month’s typical high and low, and what it brings.
What stands out about Winchester’s climate
Compared with towns across the U.S., with Winchester’s place in Oklahoma beside it.
What a year in Winchester feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 203 frost-free days a year
In half of years the last 32° night comes by April 8 and the first by October 28. Frost and day counts come from NOAA’s station at Okmulgee Wtr Wks, OK, 12 miles from the town’s center, 200 ft lower.
The 2023 USDA map puts Winchester’s center in zone 7b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 9°. 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 7 inches of snow a winter
Snow, measured at Bristow, OK, falls mostly in January. Precipitation (rain plus melted snow) adds up to 43 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 77 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Winchester
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 Okmulgee Wtr Wks, OK.
Living with Winchester’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
203 frost-free days in zone 7b. The last frost comes by Apr 8 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 28.
Months with highs of 62–84° and lows of 40° or more: March, April, May, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Winchester from natural hazards, river flooding is the largest share (34%); heat waves, cold waves, winter storms and ice storms together are 29%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Winchester and similar climates
TownRatings has no climate map of the towns around Winchester yet.
Climates most like Winchester’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 |
|---|---|---|---|---|
| Winchester, OK | 28° | 92° | 43" | 6.7" |
| Lancaster, SC | 31° | 91° | 43" | 2.6" |
| Harrisburg, NC | 31° | 90° | 45" | 3.3" |
| Branson, MO | 25° | 90° | 45" | 6.8" |
| East Highland Park, VA | 28° | 90° | 46" | 8.8" |
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 Winchester averaged 0.0° warmer than the 1900s. The biggest change is in March (+1.3°).
A smaller shift than in all but 4 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 Winchester compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Winchester’s place among Oklahoma’s.
Winchester weather by month
Highs, lows and precipitation from NOAA’s grid at Winchester’s center; snow, wet days and snow on the ground from Bristow, OK. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 49° | 28° | 1.9" | 2.1" | 5 | 33° – 47° |
| February | 54° | 32° | 2.0" | 0.8" | 5 | 36° – 52° |
| March | 62° | 41° | 3.4" | 1.8" | 7 | 45° – 61° |
| April | 71° | 49° | 4.5" | 0.0" | 7 | 54° – 66° |
| May | 79° | 58° | 5.7" | 0.0" | 9 | 65° – 76° |
| June | 87° | 67° | 4.7" | 0.0" | 8 | 73° – 83° |
| July | 92° | 71° | 3.7" | 0.0" | 6 | 77° – 89° |
| August | 92° | 70° | 3.6" | 0.0" | 6 | 75° – 87° |
| September | 84° | 62° | 4.2" | 0.0" | 7 | 68° – 80° |
| October | 73° | 50° | 3.8" | 0.0" | 6 | 55° – 69° |
| November | 61° | 40° | 3.1" | 0.5" | 5 | 44° – 57° |
| December | 51° | 31° | 2.6" | 1.5" | 6 | 30° – 46° |
| Year | 71° | 50° | 43.0" | 6.7" | 77 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 30° to 46°. June is the most reliable, staying within 10°.
Where Winchester’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 Winchester’s center.
- Snow: Bristow, OK.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Okmulgee Wtr Wks, OK, 12 miles from the town’s center, 200 ft lower; 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 Winchester’s climate
What is the weather like in Winchester?
A typical July afternoon reaches 92°, a January night drops to 28°, and about 7 inches of snow falls in a normal winter. Milder January nights than 70% of U.S. towns; hotter July afternoons than 88% of U.S. towns.
How cold does it get in Winchester in winter?
January nights average 28°. About 87 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 33°.
How much snow does Winchester get?
About 6.7 inches in a normal winter at Bristow, OK, most of it in January.
How hot does it get in Winchester?
July, with a typical high of 92° and a low of 71°. About 67 days a year reach 90° and 14 reach 100° (Okmulgee Wtr Wks, OK).
When is the first and last frost in Winchester?
In half of years the last spring frost (32°) comes by April 8 and the first fall frost by October 28, about 203 frost-free days, at Okmulgee Wtr Wks, OK.
What growing zone is Winchester in?
Zone 7b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 9°.
What is the best time of year to visit Winchester?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Winchester getting warmer?
Yes: 1991–2020 averaged 0.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than all but 4 U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Winchester.
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.