Climate and monthly weather forecast
Guymon, OK

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The climate of Guymon

Situated within the parameters of the mid-latitude steppe, Guymon, Oklahoma, USA possesses weather attributes corresponding to the BSk - Köppen climate classification. Spearheaded by semi-arid conditions, this categorization hints at prairies with crisp winters and warm summers. A weather-based expedition through the year in Guymon paints a diverse and vibrant image filled with aforementioned characteristics.

A year in Guymon embarks on a journey that zigzags from cold levels of 28.9°F (-1.7°C) in winter to as high as 94.5°F (34.7°C) during months of summer. A similar pattern follows the trail in humidity, snowfall, and rain metrics. The relative humidity averages around 45-56% and culminates at 56% during the last month of the year. The months from January to March and November and December witness a dusting of snowflakes. At the extreme, a snowfall of 1.85" (47mm) ends up painting the town white in January.

Rainfall seems to have a preference for summer and autumn seasons with a hefty downpour reaching its zenith in July with 2.01" (51mm). The scale of rainfall stays consistent throughout the year with the exception of November where a mere splattering of 0.35" (9mm) registers the lowest precipitation. The town's landscape receives bouts of sunshine almost uniformly all year, with a high point of 14.6 daylight hours and 11.7 sunshine hours in June. A noteworthy pattern traced in weather conditions pertains to the UV index, which escalates from 2 to a summer high of 7.

The best time to visit Guymon

Considering the diversely spread weather oscillations throughout the year, the ideal time for a visit would lean towards the spring and autumn months. April to June provides a sweet spot with comfortable temperature averages and prolonged hours of sunlight. The rainfall during these months remains fairly moderate, bolstering the allure of outdoor activities and sightseeing ventures.

The worst time to visit Guymon

The stark rise of temperature during the period from June to August, peaking at a scorching 94.5°F (34.7°C) in July, makes this time span a less desirable option for visitors. The escalated temperature is complemented by highest rainfall volumes, further reducing the appeal of outdoor exploration during these months.

Spring weather in Guymon

Springtime from March to May steers the temperature from a milder 40.6°F (4.8°C) to a warm 70.5°F (21.4°C). With the mounting temperature, March also ushers in an increasing trend in rainfall, scaling up from 0.83" (21mm) to 1.42" (36mm) by May. A complementary factor worthy of notice is the boost in sunshine hours from 8.7 to 10.9 hours in May, rendering the environment ideal for ambling through the town.

Summer weather in Guymon

The summer in Guymon enters with escalating mercury levels that reach a culmination of 94.5°F (34.7°C) in July before regressing to 91.9°F (33.3°C) by August. Corresponding with the temperature dynamics, the rainfall volume surges, registering its yearly high of 2.01" (51mm) in July. Despite intensified key weather parameters, the high UV index of 7 and extended daylight hours promote the vivacity of the summer months.

Autumn weather in Guymon

The temperature during the autumn months exhibits a downward trend from a plush 84.4°F (29.1°C) in September to a cool 59°F (15°C) by November. October encounters a significant spike in rainfall volume, catapulting from 1.02" (26mm) to 1.26" (32mm) amidst an otherwise steady decline during this season. While September savors the last bouts of 9.3 sunshine hours, November ushers in the winter season with shorter daylight hours and prolonged periods of cloud cover.

Winter weather in Guymon

Winter in Guymon unfurls a chilly screenplay with temperature sliding down the scale to 28.9°F (-1.7°C) in December. Along with a plummet in temperature, December also witnesses a surge in snowfall with 1.02" (26mm) after a dormant period from April to November. Noticeably, the rainfall drops to 0.55" (14mm), and the daylight hours contract to a minimum of 9.7 hours in December, highlighting the mood of the winter months.

Weather in January

January in Guymon, Oklahoma, exhibits one of the most freezing temperatures of the year, as highs and lows float around 48.9°F (9.4°C) and 28.9°F (-1.7°C), respectively. An overarching characteristic of the month involves layers of cloud present about 22% of the time. Weather in January »

Weather in February

In Guymon, the slight improvement in temperatures in February compared to the previous month does not rob winter of its dominance just yet. The course of the month sees temperatures ranging from highs around 51.1°F (10.6°C) to lows around 30.7°F (-0.7°C). Weather in February »

Weather in March

The arrival of March brings about a decent rise in temperatures, signalling the approaching end of winter. The climate undergoes changes with average temperatures from 63.3°F (17.4°C) up to 40.6°F (4.8°C). The increased temperatures hint at the forthcoming Spring weather. Weather in March »

Weather in April

April marks an appreciable shift from the colder months as temperatures hit up to 70.5°F (21.4°C), leaving the lows at 46.8°F (8.2°C), and creating a warm oasis in what were once freezing streets of Guymon. The gradual increase in temperature enhances the city's natural beauty, making it a perfect time for outdoor activities. Weather in April »

Weather in May

May in Guymon is characterised by an upsurge in temperatures signifying the advent of summer, with temperatures peaking at 79.3°F (26.3°C) and dipping not lower than 55.8°F (13.2°C). Warm, bright days become increasingly common and the city begins to buzz with summer energy. Weather in May »

Weather in June

June marks the arrival of summer in full force as the city sees its highest average temperature of 92.3°F (33.5°C) while the minimum does not fall below 68.4°F (20.2°C). With long sunny days, the city brightens up, receiving the maximum daylight hours of the year. Weather in June »

Weather in July

In July, Guymon hits the peak of summer with temperatures soaring to highs of 94.5°F (34.7°C) and lows not crossing below 72.1°F (22.3°C) mark. The consistently high temperatures make for hot and dry days within the city. Simultaneously, the city witnesses the highest amount of rainfall for the year, providing necessary relief from the heat. Weather in July »

Weather in August

August observes a minor drop in temperatures from the previous month, marking the gradual recede of summer. The maximum and minimum temperature stand around 91.9°F (33.3°C) and 69.8°F (21°C), respectively. Despite the high temperatures, the month experiences only moderate levels of humidity, providing some respite to the inhabitants. Weather in August »

Weather in September

September marks the transition from summer to fall in Guymon. The temperatures slowly decrease, resulting in an average high and low of 84.4°F (29.1°C) and 63°F (17.2°C) respectively. Changes become quite apparent as the rainy days start decreasing, and the days start getting shorter. Weather in September »

Weather in October

October in Guymon indicates the heart of the fall season, with average temperatures fluctuating from highs near 70°F (21.1°C) to lows around 49.8°F (9.9°C). The residents of the city start feeling the chill as the autumn leaves fall, and the wind speed remains reasonably steady. Weather in October »

Weather in November

November sees the advent of winter as temperatures prominently drop to an average high of 59°F (15°C) and a low of 38.3°F (3.5°C) in Guymon. The arrival of winter is also evident from the reduction in rainfall and increase in cloud coverage. Weather in November »

Weather in December

In Guymon, December displays typical winter behaviour, with temperatures averaging between 47.7°F (8.7°C) and 28.9°F (-1.7°C). The city gets adorned in a winter blanket, setting the scene for the holiday season. Snowfall is usual, making it the perfect white Christmas destination. Weather in December »
Updated: Jul 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How much does it rain?

Throughout the year, there are 88.2 rainfall days, and 13.39" (340mm) of precipitation is accumulated.

When does it snow?

Months with snowfall are January through April, October through December.

When does it snow the most?

The month with the most snowfall is January, when snow falls for 2.8 days and typically aggregates up to 1.85" (47mm) of snow.

How much does it snow?

In Guymon, during the entire year, snow falls for 14.6 days and aggregates up to 6.42" (163mm) of snow.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

When it does not snow?

May through September are months without snowfall.

What is the least humid month?

The least humid month is June, with an average relative humidity of 44%.

When are the longest days?

The month with the longest days is June, with an average of 14h and 36min of daylight.

What month has the most sunshine in Guymon?

The month with the most sunshine is June, with an average of 11.7h of sunshine.

When is the highest UV index?

June through August, with an average maximum UV index of 7, are months with the highest UV index.

What are the warmest months?

In Guymon, the average highest temperatures are observed in July, with a high of 94.5°F (34.7°C) and a low of 72.1°F (22.3°C).

What is the wettest month?

The month with the most rainfall is July, when the rain falls for 13.5 days and typically aggregates up to 2.01" (51mm) of precipitation.

What is the driest month?

November is the month with the least rainfall. Rain falls for 2.5 days and accumulates 0.35" (9mm) of precipitation.

What month is the coldest?

Guymon experiences its average lowest temperatures in December, reaching a peak of 47.7°F (8.7°C) and a minimum of 28.9°F (-1.7°C).

What is the most humid month?

December is the most humid month in Guymon, with an average relative humidity of 56%.

What is the month with the shortest days?

With an average of 9h and 42min of daylight, December has the shortest days of the year.

What is the month with the least sunshine?

With an average of 6.7h of sunshine, December has the least sunshine of the year.

When is the lowest UV index in Guymon?

With an average maximum UV index of 2, December is the month with the lowest UV index.

Average temperature
Guymon, OK

Average temperature - Guymon, OK

The warmest month (with the highest average high temperature) is July (94.5°F).
The month with the lowest average high temperature is December (47.7°F).

The month with the highest average low temperature is July (72.1°F).
The coldest months (with the lowest average low temperature) are January and December (28.9°F).

Average pressure
Guymon, OK

Average pressure - Guymon, OK

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).

Average wind speed
Guymon, OK

Average wind speed - Guymon, OK

The windiest month (with the highest average wind speed) is June (13.4mph).
The calmest month (with the lowest average wind speed) is January (10.6mph).

Average humidity
Guymon, OK

Average humidity - Guymon, OK

The month with the highest relative humidity is December (56%).
The month with the lowest relative humidity is June (44%).

Average rainfall
Guymon, OK

Average rainfall - Guymon, OK

The wettest month (with the highest rainfall) is July (2.01").
The driest month (with the least rainfall) is November (0.35").

Average rainfall days
Guymon, OK

Average rainfall days - Guymon, OK

The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (2.5 days).

Average snowfall
Guymon, OK

Average snowfall - Guymon, OK

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Guymon, OK

Average snowfall days - Guymon, OK

The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Guymon, OK

Average daylight / Average sunshine - Guymon, OK

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

Average sunshine days
Guymon, OK

Average sunshine days - Guymon, OK

The month with the most sunshine days is January (25.5 days).
The month with the least sunshine days is July (12.7 days).

Average visibility
Guymon, OK

Average visibility - Guymon, OK

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Guymon, Oklahoma, USA

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