Guymon (OK) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Guymon.
Climate overview of Guymon
Guymon, Oklahoma, United States of America, sees big temperature differences between seasons, with July peaking at 35°C (95°F) and December dropping to 9°C (48°F).
The city tends toward dry conditions, with around 429 mm (17 in) of rain/snowfall per year. It does, however, have a distinct dry season from November to April, with very warm summers and cold winters.
Guymon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Guymon - and find the best time to visit.
Monthly Temperature in Guymon
Visitors to Guymon can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a very warm 35°C (95°F) in July to a chilly 9°C (48°F) in the coolest month, December.
Nights vary from 19°C (66°F) in July to around -6°C (21°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Guymon
Guymon's climate is marked by below-average rain/snowfall, accumulating 429 mm (17 in) of precipitation yearly. The climate in Guymon shows significant variation throughout the year. Expect moderate rainfall in August, the wettest month, with an average of 79 mm (3.1 in) of precipitation over 10 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 6.4 mm (0.3 in) of rainfall over 3 rainy days. For more details, please visit our Guymon Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Guymon
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: March, April, May and October
- Warmest weather: July and August
- Seasonal pattern: A distinct dry season from November to April, with very warm summers and cold winters
- Coldest conditions: December, with freezing nights around -6°C (21°F).
Frequently asked questions about the climate in Guymon
What is the best time to visit Guymon?
March, April, May and October typically offer the most optimal weather in Guymon. In contrast, July and August tend to have less optimal conditions. Guymon has a distinct dry season from November to April, with very warm summers and cold winters.
What temperatures can I expect in Guymon?
Daytime highs range from 9°C (48°F) in December to 35°C (95°F) in July. Nighttime lows range from -6°C (21°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Guymon get?
Annual rainfall is around 429 mm (17 in). August is the wettest month with 79 mm (3.1 in), while January is the driest with 6.4 mm (0.3 in).
Guymon 3-Day Forecast
Guymon (OK) 3-Day Forecast
Guymon on the map
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