Last updated: February 24, 2025
In September, Whitefish, United States, experiences a vibrant transition from summer to autumn, with temperatures ranging from a maximum of 30°C (86°F) to a chilly minimum of -3°C (27°F). The average temperature hovers around 12°C (53°F), creating a crisp atmosphere ideal for outdoor adventures. This month sees 49 mm (1.9 in) of precipitation, spread over 8 days, offering a refreshing break from the warmer days. With a humidity level of 69%, the air feels slightly damp, contributing to the rich colors of seasonal foliage. Whether reveling in the last days of warmth or embracing the coolness of approaching fall, September in Whitefish offers a diverse and engaging experience.
In September, Whitefish, United States, experiences a remarkable transition as summer gently gives way to autumn. With temperatures ranging from a chilly -3°C (27°F) at night to a warm 30°C (86°F) during the day, this month offers a delightful mix of cool mornings and pleasantly warm afternoons, making it a perfect time for outdoor activities. The average temperature of 12°C (53°F) indicates a significant drop from the previous month, hinting at the approach of cooler weather. As the leaves begin to change color, the mild days encourage locals and visitors alike to soak in the breathtaking scenery of the surrounding landscape, encapsulating the beauty of an idyllic fall season in Whitefish.
In September, Whitefish experiences a notable transition in its weather patterns, characterized by a precipitation amount of 49 mm (1.9 in) falling over 8 days. This marks a slight uptick from the drier summer months of July and August, which recorded just 26 mm (1.0 in) and 32 mm (1.2 in) respectively. As the region prepares for the upcoming autumn, this shift signals a return to more soggy conditions, with precipitation levels trending higher than those of the previous two months. September's rainfall represents a key transition, contributing to the area's lush landscapes as it moves into the wetter months ahead, and hints at the arrival of the chilly, wet weather of October and November.
In September, Whitefish, United States, experiences a continuation of its summer decline in humidity, holding steady at 69%. This marks a significant drop from the height of 91% in February and an even more remarkable reduction from the year’s peak in January. As the summer months come to a close, this consistent humidity level reflects the transition toward cooler autumn weather. Interestingly, the drop to 69% in both August and September suggests a gradual shift to drier conditions, with humidity levels expected to rise again as winter approaches. Overall, September's humidity indicates a comfortable end to summer, paving the way for the crisp air of fall in Whitefish.
As summer fades in September, the UV Index in Whitefish sees a slight decrease, settling at a high level of 7, which requires a burn time of 25 minutes for unprotected skin. This marks a transition from the very high UV levels of the preceding months, suggesting that while outdoor enthusiasts can still enjoy the warm weather, it's essential to remain vigilant about sun protection. The overall trend across the year indicates a clear peak during the summer months, with UV levels gradually declining as the colder seasons approach. For more information on UV levels throughout the year, visit Whitefish UV Index.
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As summer gently gives way to fall, September in Whitefish offers a blissful blend of warmth and daylight, with 268 hours of sunshine illuminating the landscape. This month marks a noticeable shift from the peak summer days of July, which basked in a glorious 409 hours of sunlight. While September sees a decline, it still holds onto a generous amount of radiant hours, outshining both October and November significantly. The transition is smooth, as outdoor enthusiasts can savor the lingering warmth of early autumn while enjoying the stunning scenery that comes alive with autumn hues. This seasonal shift invites residents and visitors alike to relish each golden moment before the shorter days of winter take hold.
As summer winds down, September in Whitefish experiences a noticeable transition in weather patterns, boasting a 52% chance of sunny days. This marks a significant improvement compared to the months leading up to it, notably emerging from August's 49%. The month showcases a blend of late-summer warmth and early autumn crispness, making it an ideal time for outdoor activities. Notably, the likelihood of sunshine remains robust, hovering above the averages seen in April and May, suggesting that while autumn is approaching, the sun continues to shine brightly on this picturesque Montana town. With September often hosting beautiful, radiant days, it invites locals and visitors alike to savor the last rays of summer before the colder months set in.
As summer fades into fall, September in Whitefish, United States, sees a gentle transition in daylight duration with about 12 hours of sunlight. This marks a gradual decline from the longer days of July and August, which offered 15 and 14 hours respectively. While still a sizeable amount of daylight, September's hours hint at the approaching cooler months, as the daylight slowly dwindles towards 10 hours in October. This month serves as a bridge, allowing residents to bask in the tail end of summer while preparing for the cozy ambiance of autumn.
As September arrives in Whitefish, the wind whispers gently through the trees at an average speed of 1.9 m/s (4 mph), a slight uptick from the summer months. This consistent breeze reflects a broader trend seen throughout the year, where winds tend to remain relatively calm, with January being the quietest month at 1.6 m/s (4 mph). While the wind speeds peak modestly in April at 2.2 m/s (5 mph), September's breezy conditions mark a gradual return to the cooler, crisper air of fall. As the seasons transition, the winds maintain a steady rhythm, inviting residents and visitors alike to embrace the serene landscapes of Whitefish.
The weather in Whitefish changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Whitefish and find detailed weather information for every month.
September and January present starkly contrasting weather conditions. September boasts milder temperatures, with a minimum of -3°C (27°F) and an average of 12°C (53°F), rising to a maximum of 30°C (86°F). The month experiences 49 mm (1.9 in) of precipitation over about 8 days, with a humidity level of 69%. In contrast, January is characterized by frigid temperatures, dipping as low as -26°C (-15°F) and averaging -6°C (22°F), with a peak of only 4°C (39°F). Precipitation increases to 66 mm (2.6 in) over 14 days, along with a notably higher humidity at 93%. For a detailed look at the weather during this cold month, you can refer to Whitefish weather in January.
September and February present starkly contrasting weather conditions. In September, temperatures typically range from a chilly -3°C (27°F) at night to a warm 30°C (86°F) during the day, with an average of 12°C (53°F). Precipitation is moderate at 49 mm (1.9 in) across about 8 days, accompanied by a humidity level of 69%. In contrast, February experiences much harsher conditions, with minimum temperatures plummeting to -35°C (-31°F) and an average temperature of -8°C (17°F), reaching a maximum of only 10°C (51°F). The month is wetter, receiving 95 mm (3.7 in) of precipitation over approximately 16 days, and humidity rises to 91%. For a more detailed look at February weather, check out Whitefish weather in February.
In September, the weather in Whitefish is considerably milder, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 30°C (86°F), and an average temperature of 12°C (53°F). The month typically sees about 49 mm (1.9 in) of precipitation over approximately 8 days, coupled with a humidity level of 69%. In contrast, March experiences much colder conditions, with temperatures varying from a chilly -27°C (-17°F) to a comfortable 16°C (60°F) and an average of -1°C (30°F). This month is also wetter, with 71 mm (2.8 in) of precipitation spread across 16 days, and a higher humidity level of 88%. For more details on March weather, you can check this link: Whitefish weather in March.
In comparing the weather of September and April, notable contrasts emerge. September boasts a wider temperature range with a minimum of -3°C (27°F), an average of 12°C (53°F), and a maximum reaching 30°C (86°F). This month experiences relatively mild conditions, with 49 mm (1.9 in) of precipitation over just 8 days at a humidity level of 69%. In contrast, April presents a colder environment, featuring a minimum of -18°C (0°F) and an average of 3°C (37°F), with highs only reaching 22°C (73°F). The precipitation in April is significantly higher, totaling 91 mm (3.6 in) over 17 days, and it has a higher humidity level of 84%. For more details on the specific weather conditions in April, you can check Whitefish weather in April.
When comparing the weather in September and May, several notable differences emerge. September generally experiences milder temperatures with average highs reaching 30°C (86°F) and minimums around -3°C (27°F), while May has cooler overall temperatures, with averages hovering around 9°C (49°F) and a maximum of 27°C (80°F). Additionally, September tends to be drier, with only 49 mm (1.9 in) of precipitation over 8 days, compared to May's wetter conditions, which bring in 76 mm (3.0 in) of rain over 14 days. Humidity levels are slightly lower in September at 69%, compared to the 78% experienced in May. For more details on the weather in May, you can visit Whitefish weather in May.
September and June exhibit notable differences in weather patterns. In September, temperatures range from a minimum of -3°C (27°F) to a maximum of 30°C (86°F), creating a broader variation, while June has milder lows of 0°C (32°F) and highs reaching up to 35°C (96°F). Additionally, June experiences higher humidity at 77% compared to September's 69%. Precipitation is more prevalent in June, with 74 mm (2.9 in) over 13 days, while September sees 49 mm (1.9 in) across 8 days, indicating a drier month. For more detailed information about weather conditions in June, you can check Whitefish weather in June.
In comparing the weather of September and July, September presents a broader temperature range with minimums dropping to -3°C (27°F) and maximums reaching up to 30°C (86°F), resulting in an average of 12°C (53°F). It experiences more days of precipitation, with about 49 mm (1.9 in) falling over 8 days, and a humidity level of 69%. In contrast, July offers warmer conditions with a milder minimum of 4°C (39°F) and a higher average temperature of 18°C (65°F), peaking at 34°C (94°F). Rainfall in July is lighter, with only 26 mm (1.0 in) occurring over just 5 days and higher humidity at 79%. For more detailed weather information, you can refer to Whitefish weather in July.
In comparing the weather of September to August, it is evident that September experiences cooler temperatures, with a minimum of -3°C (27°F) and an average of 12°C (53°F), whereas August has a milder minimum of 2°C (36°F) and an average of 17°C (64°F). Additionally, August boasts higher maximum temperatures, reaching up to 36°C (98°F), compared to September's maximum of 30°C (86°F). Precipitation is slightly more prevalent in September, with 49 mm (1.9 in) over 8 days, while August records only 32 mm (1.2 in) of precipitation over 5 days. Both months share the same humidity level of 69%. For more details on August weather in Whitefish, you can check out Whitefish weather in August.
September typically offers a more moderate climate, with temperatures ranging from a chilly -3°C (27°F) at night to a warm 30°C (86°F) during the day, resulting in an average of 12°C (53°F). The month experiences about 49 mm (1.9 in) of precipitation over 8 days, with a humidity level around 69%.
In contrast, October brings a significant drop in temperatures, with nighttime lows plummeting to -19°C (-1°F) and daytime highs reaching only 23°C (74°F), averaging around 4°C (39°F). Additionally, October sees increased precipitation of 83 mm (3.3 in) spread across 12 days, accompanied by a rise in humidity to 78%. For more detailed weather information, check out Whitefish weather in October.
September and November showcase stark contrasts in weather patterns. In September, temperatures range from a mild minimum of -3°C (27°F) to a warm maximum of 30°C (86°F), with an average of 12°C (53°F). Precipitation is relatively low at 49 mm (1.9 inches) over about 8 days, accompanied by a humidity level of 69%. In contrast, November brings much colder temperatures, with a minimum of -22°C (-8°F) and a maximum of just 12°C (54°F), averaging around -1°C (31°F). The month is significantly wetter, delivering 94 mm (3.7 inches) of precipitation across 17 days and a higher humidity level of 87%. For a closer look at what to expect, check out Whitefish weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures fluctuate from a chilly -3°C (27°F) at night to a warm 30°C (86°F) during the day, with an average of 12°C (53°F). This month experiences 49 mm (1.9 in) of precipitation over 8 days and has a humidity level of 69%. In contrast, December sees much colder temperatures, ranging from a harsh -27°C (-16°F) at its lowest to a maximum of 11°C (51°F), with an average of -4°C (24°F). Precipitation increases significantly to 93 mm (3.6 in) occurring over 17 days, and humidity rises to 94%. For more details on the wintery conditions, you can visit Whitefish weather in December.
September in Whitefish brings a delightful shift in weather, offering a refreshing blend of warm days and cooler nights. As the month transitions into fall, temperatures gradually decrease from the summer highs, creating a more comfortable atmosphere, though occasional sunny spells still lead to pleasant afternoons. With an average humidity of 69% and around 8 days of precipitation, September is a unique month where the crispness of approaching autumn meets the remnants of summer warmth. This combination makes it an ideal time for outdoor adventures, blooming fall colors, and cozy evenings. For a more comprehensive look at how September compares to other months, visit Whitefish Climate.