Climate and monthly weather forecastCasselton, ND

The climate of Casselton

Casselton, North Dakota, is subject to a Dfb (humid continental, no dry season, warm summer) climate according to the Köppen climate classification. Situated in the eastern part of the state, it experiences significant seasonal variations in the weather.

Throughout the year, the temperature typically ranges from the lowest of 3.2°F (-16°C) in the winter months to the highest of 80.8°F (27.1°C) during the summer time. Climate indicators reveal a pattern of increasing humidity levels, peaking at 91% in the winter months, then decreasing to 62% during the fall.

Rainfall is quite prevalent over the course of the year in Casselton, with cumulative totals of up to 17.91" (455mm) annually. The area experiences the highest rainfall of 3.46" (88mm) in June, while the lowest rainfall is observed in January and February, each with just 0.55 and 0.63" (16mm) respectively. The presence of snowfall extends from January to April and then resumes from October to December, leaving only the summer months without any snow.

The best time to visit Casselton

With warm and comfortable weather, the period from June to August stands out as the best time to visit Casselton. These summer months regularly maintain an average high temperature ranging from 71.8°F (22.1°C) to 80.8°F (27.1°C). July, notably, claims the highest temperature average at 80.8°F (27.1°C).

June to August period is also delightfully marked by the longest daylight hours of the year, ranging from 14.2 hours to 15.8 hours. With up to 10.9 hours of sunshine per day in July, these months ensure delightfully long and sunny days for visitors.

The worst time to visit Casselton

The weather conditions from December through February create rather unfavorable conditions for visiting Casselton. This period is marked by the year’s lowest temperature averages, dipping down to the lowest point of 3.2°F (-16°C) in January. Along with the frigid temperatures, these months are also witnesses to heaviest snowfall, mount up to 3.74" (95mm) in December.

In congruence with bleak weather conditions, the shortest daylight hours of the year occur between December and February, merely ranging from 8.6 hours to 10.3 hours daily. The lack of sufficient daylight adds to the challenging weather conditions encountered during this time.

Spring weather in Casselton

Springtime in Casselton, from March to May, rekindles warmth after the winter slumber. Temperatures gradually rise from a low average of 21.9°F (-5.6°C) in March to a mild 48.6°F (9.2°C) by the end of May. While snow continues to grace the town until April, the rate declines over the course of the spring months, eventually ceasing by May. Notable increase in daylight hours, extending to about 15.1 hours by the end of May, marks a distinct transition into brighter and warmer days.

Summer weather in Casselton

Summer in Casselton runs from June to August. Humidity levels rise to about 75% in June before decreasing again, and temperatures typically hover between 65.7°F (18.7°C) in early summer and 80.8°F (27.1°C) in late summer. While rain is fairly common during the summer months, snow is completely absent, making it the only period when snow does not occur. The daylight hours are the longest of the year during summer, peaking at up to 15.8 hours in June, ensuring plenty of time to enjoy the warmth and clear skies.

Autumn weather in Casselton

Autumn, from September to November, witnesses a significant drop in temperature from the warm summer months. From a pleasant high average of 71.8°F (22.1°C) in September, the average high drops to 37.6°F (3.1°C) by the end of November. Fresh bouts of snow begin in November, announcing the arrival of winter. Despite the falling temperatures and daylight hours, autumn still introduces some enjoyable weather before the winter chill sets in.

Winter weather in Casselton

The winter season in Casselton, extending from December to February, is characterized by harsh and cold conditions. The temperature averages slide down to their annual lows, reaching as low as 3.2°F (-16°C) in January. Regular snowfall and frigid temperatures envelop the area during this period, coupled with the year’s shortest daylight hours, ranging from 8.6 hours to 10.3 hours. Consequently, winter in Casselton can be quite severe and is generally the least hospitable time for visitors.

Weather in January

The beginning of the year in Casselton, North Dakota, sees weather at its frostiest. January's arctic climate is showcased in stats indicating an average low of 3.2°F (-16°C) and a high only peaking at 16.7°F (-8.5°C). Snow, a common January vision, dainty flakes descending in hushed tranquility and frosting the environment — enhances the tranquil, wintry mood. Weather in January »

Weather in February

February's weather conditions are a slight reprieve from the severity of a typical Casselton winter. Despite the moderate relief, the weather statistics still feature frost with temperatures ranging from 6.1°F (-14.4°C) to 19.8°F (-6.8°C). Weather in February »

Weather in March

As March unfolds, the city of Casselton ushers in the much-anticipated spring season. The temperatures climb marginally, peaking at a more tolerable 35.1°F (1.7°C) and promising the gradual melting away of winter’s icy shackles. Weather in March »

Weather in April

Casselton’s meteorological identity undergoes a transformation in April, segueing from frosty winter to vivacious spring. The warmer climate, defined by temperatures that escalate to a comfortable 51.1°F (10.6°C), heralds the arrival of blooming flowers and chirping birds. Weather in April »

Weather in May

In May, Casselton basks in the newfound energy of spring. The weather, showcased by high temperatures that escalate to 65.7°F (18.7°C), sets the stage for thriving flora and fauna. With the arrival of increased daylight hours and the explosion of blossoming plants, Casselton’s natural beauty truly comes alive. Weather in May »

Weather in June

Casselton, North Dakota, gleefully embraces the summer season in June. With the mercury soaring up to 74.5°F (23.6°C), the lively energy of summer sets in, marking an end to the wintry landscape of the previous months. The days are drenched in sunlight, culminating in gentle, warm evenings perfect for family barbecues and neighborhood get-togethers. Weather in June »

Weather in July

Come July, Casselton basks in the apex of summer glory. Characterized by average temperatures peaking at 80.8°F (27.1°C), it is undeniably the warmest month of the year. The warm temperatures accompany the high UV index, necessitating the wear of appropriate sun protection for those spending time outside. Weather in July »

Weather in August

Casselton's weather remains bracing in August, with the average temperature mirroring July's peak at 80.8°F (27.1°C). With such summery conditions continuing, the citizens enjoy extended daylight hours perfect for recreational activities. Weather in August »

Weather in September

The advent of September introduces a noticeable shift in Casselton's climatic conditions. The scenic allure of fall takes effect, accompanied by a significant dip in temperature to a high of 71.8°F (22.1°C). The local parks and streets begin their annual transformation, with the greenery giving way to an array of warm, vibrant colors. Weather in September »

Weather in October

Casselton's October weather ushers in the classic autumn ambiance. The chill in the air grows more apparent, with temperatures dropping to a brisk high of 54°F (12.2°C). As the night creeps in earlier with each passing day, the vibrant fall hues paint the city in a spectacle of orange and red. Weather in October »

Weather in November

Casselton transitions into winter in November, marked by the falling leaves and the delivery of the first snowfall. The temperature sees a drastic plunge, with the high descending to 37.6°F (3.1°C). The sight of snowflakes drifting down from the increasingly cloudy sky becomes a common sight, marking the impending arrival of the harsh North Dakota winter. Weather in November »

Weather in December

In December, the city of Casselton welcomes winter in full swing. The biting winter cold becomes tangible as temperatures plummet to an average high of only 20.8°F (-6.2°C). Snowflakes decorating window panes and the sight of breath fogging up in the cold air become an everyday occurrence. Weather in December »