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Weather in Guymon, OK · National Weather Service + NOAA

Guymon has hot summers

Guymon has chilly winters and hot summers, with very little rain. A typical July afternoon reaches 94°, a January night drops to 22°, and about 3 inches of snow falls in a normal winter. In November, a normal day reaches 60° and a normal night drops to 31°.

Winter 51°/23°Spring 71°/41°Summer 92°/64°Fall 72°/43°
Right now
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Sunrise 8:11 am · sunset 6:47 pm

Getting the latest forecast from the National Weather Service…

What stands out about Guymon’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Hot summersJuly afternoons average 94°, hotter than 95% of U.S. towns.Among Oklahoma’s coldest wintersJanuary nights average 22°, colder than 814 of 838 Oklahoma towns.A short growing season188 frost-free days, from Apr 18 to Oct 23.A dry climateJust 18 inches of rain and melted snow a year, less than 91% of U.S. towns.
A normal year

Where today sits in Guymon’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
51° / 23°
Snow is rare
Spring
71° / 41°
Last frost around Apr 18
Summer
92° / 64°
89 days reach 90° in a normal year
Fall now
72° / 43°
First frost around Oct 23
Pastthe usual first frost (Oct 23). Last frost next spring: Apr 18
Best months to be outside
AprMayOct
Highs of 62–84° and lows of 40° or more
How much snow does Guymon get?About 3 inches a winter.When is it wettest?August, with 2.8 inches.Is it warmer than it used to be?+0.9° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Guymon.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Guymon itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Goodwell Rsch Stn, OK (10 mi, snow) and Guymon Municipal Airport, OK (2 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.