Hotel Dale · Photo: TulGuy · CC0Guymon reaches 100° on about 22 days a year, more than 96% of U.S. towns
A typical July afternoon reaches 94°, a January night drops to 22°, and about 3 inches of snow falls in a normal winter.
A year in Guymon at a glance
Each month’s typical high and low, and what it brings.
What stands out about Guymon’s climate
Compared with towns across the U.S., with Guymon’s place in Oklahoma beside it.
What a year in Guymon feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 188 frost-free days a year
In half of years the last 32° night comes by April 18 and the first by October 23. Frost and day counts come from NOAA’s station at Guymon Muni Airport, 1.7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Guymon’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 0°. 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 3 inches of snow a winter
Snow, measured at Goodwell Rsch Stn, OK, falls mostly in January and March. Precipitation (rain plus melted snow) adds up to 18 inches a year; August is the wettest month and February the driest. Rain or snow falls on about 54 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Guymon
72% 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 Guymon Muni Airport.
Living with Guymon’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
188 frost-free days in zone 6b. The last frost comes by Apr 18 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 23.
Months with highs of 62–84° and lows of 40° or more: April, May and October. 3.3 miles of trails are waiting.
Parks & trails →Cold waves are 30% of the yearly building losses FEMA expects in Guymon from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Guymon and similar climates
TownRatings has no climate map of the towns around Guymon yet.
Climates most like Guymon’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 |
|---|---|---|---|---|
| Guymon, OK | 22° | 94° | 18" | 2.7" |
| Lovington, NM | 26° | 93° | 15" | 1.4" |
| Muleshoe, TX | 23° | 92° | 18" | 7.5" |
| Emmett, ID | 23° | 93° | 13" | 7.4" |
| Nogales, AZ | 30° | 93° | 16" | 0.3" |
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 Guymon averaged 0.9° warmer than the 1900s. The biggest change is in March (+2.5°).
A smaller shift than in 86% 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 Guymon compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Guymon’s place among Oklahoma’s.
Guymon weather by month
Highs, lows and precipitation from NOAA’s grid at Guymon’s center; snow, wet days and snow on the ground from Goodwell Rsch Stn, OK. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 49° | 22° | 0.4" | 0.9" | 3 | 0 | 30° – 43° |
| February | 53° | 25° | 0.4" | 0.1" | 3 | 0 | 32° – 47° |
| March | 63° | 32° | 1.2" | 0.9" | 4 | 0 | 41° – 55° |
| April | 71° | 40° | 1.3" | 0.0" | 5 | 0 | 48° – 62° |
| May | 80° | 51° | 2.2" | 0.0" | 6 | 0 | 59° – 72° |
| June | 90° | 61° | 2.5" | 0.0" | 7 | 0 | 70° – 80° |
| July | 94° | 66° | 2.8" | 0.0" | 7 | 0 | 77° – 85° |
| August | 92° | 64° | 2.8" | 0.0" | 7 | 0 | 73° – 84° |
| September | 85° | 56° | 1.3" | 0.0" | 4 | 0 | 65° – 77° |
| October | 73° | 43° | 1.7" | 0.0" | 4 | 0 | 51° – 63° |
| November | 60° | 31° | 0.5" | 0.0" | 2 | 0 | 39° – 51° |
| December | 49° | 23° | 0.8" | 0.8" | 3 | 0 | 30° – 41° |
| Year | 72° | 43° | 17.8" | 2.7" | 54 | 1 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 32° to 47°. July is the most reliable, staying within 9°.
Where Guymon’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 Guymon’s center.
- Snow: Goodwell Rsch Stn, OK.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Guymon Muni Airport, 1.7 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 Guymon’s climate
What is the weather like in Guymon?
A typical July afternoon reaches 94°, a January night drops to 22°, and about 3 inches of snow falls in a normal winter. Milder January nights than 51% of U.S. towns; hotter July afternoons than 93% of U.S. towns.
How cold does it get in Guymon in winter?
January nights average 22°. About 122 nights a year reach 32° or below and 1 reach 0° or below. In the coldest January of the last 30 years the month averaged 30°.
How much snow does Guymon get?
About 2.7 inches in a normal winter at Goodwell Rsch Stn, OK, most of it in January and March, with snow on the ground about 1 days a year.
How hot does it get in Guymon?
July, with a typical high of 94° and a low of 66°. About 89 days a year reach 90° and 22 reach 100° (Guymon Muni Airport).
When is the first and last frost in Guymon?
In half of years the last spring frost (32°) comes by April 18 and the first fall frost by October 23, about 188 frost-free days, at Guymon Muni Airport.
What growing zone is Guymon in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 0°.
What is the best time of year to visit Guymon?
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 Guymon getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 86% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Guymon.
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.