Last updated: February 24, 2025
In September, Okoboji, United States, experiences a delightful blend of warmth and refreshing breezes. With a maximum temperature soaring to 32°C (91°F) and a comfortable average of 18°C (65°F), the weather invites outdoor activities and scenic exploration. However, the month also brings a touch of unpredictability, as 113 mm (4.5 in) of precipitation is recorded over 9 days, contributing to a humidity level of 75%. This combination of factors makes September a unique time to enjoy the beauty and serenity of Okoboji, where sunny days and occasional showers coexist harmoniously.
September in Okoboji, United States, marks a delightful transition as summer's warmth gently yields to the impending autumn chill. With minimum temperatures averaging 4°C (39°F) and daytime highs reaching a pleasant 32°C (91°F), this month offers a comfortable climate for both outdoor activities and relaxation by the lake. The average temperature settles around 18°C (65°F), creating a perfect backdrop for enjoying the vibrant fall foliage that begins to emerge. As the days grow shorter, the crispness in the air serves as a reminder of the changing seasons, making September an ideal time for visitors and locals alike to savor the last remnants of summer sunshine before autumn's embrace tightens.
September in Okoboji marks a notable transition in precipitation patterns, with 113 mm (4.5 in) of rainfall spread across 9 days. Surpassing the rainfall of the summer months, September's precipitation reflects a shift towards autumn, bridging the gap between the more humid days of summer and the drier months ahead. This increase follows an upward trend observed from the slightly lower August total of 111 mm (4.4 in), indicating a consistent pattern where late summer and early autumn periods receive considerable moisture. As the region gears up for fall, these September showers not only support the lush landscapes but also set the stage for the drier October ahead, where precipitation typically decreases to 93 mm (3.7 in). Overall, September stands out as a month of robust rainfall, emphasizing the seasonal transition in Okoboji.
September in Okoboji brings a slight dip in humidity, averaging 75%, a refreshing change after the summer months where humidity hovered around the 80% mark. This decrease aligns with the transition to fall, as the air starts to feel crisper and more invigorating. Interestingly, September's humidity is one of the lowest recorded levels in the year, trailing only behind May, which may contribute to a more comfortable outdoor experience. As the season shifts, residents and visitors can enjoy the vibrant scenery of early autumn without the overwhelming stickiness often associated with the height of summer.
As September arrives in Okoboji, the UV Index remains notably high at 8, categorizing it as very high and suggesting a burn time of just 15 minutes for unprotected skin. This reflects a slight decrease from the peak summer months, showcasing a trend where UV exposure gradually diminishes as fall approaches. Nevertheless, the UV levels during September are still significant, emphasizing the importance of sun protection even as the weather begins to cool. As you enjoy the picturesque lakeside views, remember to stay vigilant about UV safety! For more detailed information, you can check out the Okoboji UV Index.
UV Risk Categories
As summer fades into fall, September in Okoboji, United States, still holds onto a generous 261 hours of sunshine—a radiant close to the sun-drenched months of July and August, which showcase the peak hours at 365 and 333, respectively. The decline, while marked, is gentle compared to the drastic drop seen in the earlier winter months, uplifting the spirits as the air cools. This transition invites locals and visitors alike to bask in the warmth of early autumn, making September a perfect time to enjoy the natural beauty of this charming destination before the sun further retreats into the shorter days of October. The lingering light also hints at the seasonal shifts—from the vibrant colors of late summer to the rich hues of autumn—ensuring that Okoboji remains a picturesque haven year-round.
In September, residents and visitors of Okoboji can look forward to a 65% chance of sunny weather, aligning with the peak summer months of July and August. This marks a notable increase from the spring and early summer months, where the likelihood of sunshine hovers around the mid-30s to low-50s. As the summer heat begins to wane, the consistent sunshine in September allows for delightful outdoor activities and scenic views, continuing the vibrant atmosphere of the lake region. With the sunny days becoming more prominent, September emerges as a fantastic time to bask in the lingering warmth before the onset of autumn.
As September unfolds in Okoboji, the days begin to gradually shorten, offering about 12 hours of daylight. This marks a subtle transition from the sun-drenched summer months, where June shines with 15 hours of bright sunlight. While the daylight duration in September is still ample, it signals the onset of autumn as it trails off from the peak of 14 hours experienced in May and July. As leaves start to change and temperatures cool, residents can savor the lingering warmth of early fall days before the briskness of October arrives, bringing with it a further reduction in daylight to 10 hours. The rhythm of the seasons is palpable, with each month inviting unique experiences shaped by the shifting sunlight.
As September rolls into Okoboji, the average wind speed gently rises to 4.3 m/s (10 mph), reflecting a subtle transition in the seasonal breeze. This increase indicates a slight revival in wind activity after the quieter summer months, where July saw the lowest average at 3.3 m/s (7 mph). The winds begin to regain strength, foreshadowing the gusty conditions that will accompany the colder months. With autumn on the horizon, September's breezes hint at the changing landscape, as nature prepares for the vibrant colors and crisp air of fall, ultimately leading to an even more pronounced uptick in wind during November at 5.0 m/s (11 mph).
The weather in Okoboji 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 Okoboji and find detailed weather information for every month.
September and January present starkly contrasting weather conditions. In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 32°C (91°F), with an average of 18°C (65°F), accompanied by 113 mm (4.5 in) of precipitation over 9 days and a humidity level of 75%. In contrast, January experiences much colder temperatures, with a minimum of -34°C (-28°F) and a maximum of just 9°C (49°F), leading to an average of -8°C (18°F). The month sees significantly less precipitation at 31 mm (1.2 in) across 5 days, though the humidity is slightly higher at 80%. For a detailed look at January weather specifics, refer to Okoboji weather in January.
September and February present strikingly different weather contrasts. In September, temperatures range from a cool 4°C (39°F) at night to a warm 32°C (91°F) during the day, with an average of 18°C (65°F) and significant humidity at 75%. However, it also experiences notable rainfall, with 113 mm (4.5 in) over about 9 days. In contrast, February displays a much harsher climate, with temperatures plummeting to a frigid minimum of -33°C (-27°F) and an average of -8°C (18°F), though it can peak at a milder 19°C (66°F). Precipitation is less frequent in February, accumulating only 33 mm (1.3 in) over 6 days, accompanied by even higher humidity at 84%. For more details about the weather specifics in February, you can visit Okoboji weather in February.
September and March present stark contrasts in weather conditions. September boasts a much warmer climate, with average temperatures ranging from a mild 18°C (65°F) to a high of 32°C (91°F). It also experiences more precipitation, totaling 113 mm (4.5 in) over about 9 days, while maintaining a humidity level of 75%. In contrast, March is markedly colder, with temperatures dipping as low as -26°C (-15°F) and averaging just 1°C (34°F). Despite having slightly less precipitation at 69 mm (2.7 in) over 8 days, March shares the same humidity level of 75%. For further details on the weather during this month, check out Okoboji weather in March.
In comparing the weather of September and April, notable differences emerge. September tends to be warmer, with average temperatures around 18°C (65°F) and a maximum reaching up to 32°C (91°F), while April is cooler, averaging only 7°C (44°F) and peaking at 28°C (83°F). Precipitation in September is slightly higher at 113 mm (4.5 in), compared to April's 96 mm (3.8 in), with both months experiencing rainfall on roughly 9 days. Additionally, humidity levels are quite similar, hovering around 75% in September and 79% in April. For those interested in specific details about April weather, please see Okoboji weather in April.
September and May present contrasting weather patterns, with distinct temperature ranges and precipitation levels. In September, the temperatures vary from a minimum of 4°C (39°F) to a maximum of 32°C (91°F), averaging around 18°C (65°F). The month experiences approximately 113 mm (4.5 in) of precipitation over 9 days, accompanied by a humidity level of 75%. Conversely, May features cooler weather, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 34°C (94°F) and an average of 15°C (59°F). Although May receives slightly more precipitation at 130 mm (5.1 in) over 14 days, the humidity remains comparable at 74%. For a more detailed look at May weather, check out Okoboji weather in May.
When comparing the weather in September and June, notable differences in temperature and precipitation become apparent. September sees a range of temperatures from a minimum of 4°C (39°F) to a maximum of 32°C (91°F), with an average of 18°C (65°F), while June has slightly warmer temperatures, registering a minimum of 8°C (46°F) and a maximum of 35°C (95°F), averaging 22°C (72°F). In terms of precipitation, September experiences about 113 mm (4.5 in) over 9 days, compared to June's 132 mm (5.2 in) over 11 days, indicating that both months have a similar amount of rain, but June tends to be slightly wetter. Humidity levels are also higher in June at 81%, compared to September’s 75%, contributing to a more humid feel during the early summer month. For a more detailed look into June weather, you can check Okoboji weather in June.
In comparing the weather between September and July, we see noticeable differences in temperature and rainfall. July tends to be warmer, with average temperatures ranging from a minimum of 13°C (55°F) to a maximum of 35°C (95°F), while September has cooler average temperatures, starting at a minimum of 4°C (39°F) and peaking at 32°C (91°F). Additionally, July experiences slightly less precipitation, with 86 mm (3.4 in) over 10 days compared to September's 113 mm (4.5 in) over 9 days. Humidity levels are also higher in July at 82%, compared to 75% in September, creating a more humid summer atmosphere. For more details on July weather, you can check Okoboji weather in July.
September weather shows a notable shift compared to August, with a lower average temperature of 18°C (65°F) compared to 21°C (71°F) in August. While September can reach maximums of 32°C (91°F), it's slightly cooler than August's peak of 35°C (94°F). Both months experience similar precipitation levels, with September having 113 mm (4.5 in) over 9 days, while August sees 111 mm (4.4 in) over 11 days. Humidity remains high, but September is slightly drier at 75% compared to August's 80%. For more details about August conditions, check out Okoboji weather in August.
September weather is characterized by warmer temperatures, with a minimum of 4°C (39°F) and an average of 18°C (65°F), reaching up to a high of 32°C (91°F). Although it experiences more precipitation, totaling 113 mm (4.5 in) over 9 days, the humidity averages around 75%. In contrast, October brings a notable drop in temperatures, especially the minimum, which can plummet to -10°C (13°F), while the average temperature decreases to 9°C (48°F). Despite a slightly lower total precipitation of 93 mm (3.7 in) over 10 days, October has a higher humidity level of 77%. For a detailed look at how these conditions manifest specifically in Okoboji, you can check out the Okoboji weather in October.
In September, the weather is generally warm with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 32°C (91°F), averaging around 18°C (65°F). The month experiences moderate precipitation, totaling 113 mm (4.5 in) over 9 days, along with a humidity level of 75%. In contrast, November sees a significant drop in temperatures, with a minimum of -16°C (3°F) and an average of just 1°C (35°F). Although the maximum temperature can reach up to 25°C (76°F) on milder days, it’s accompanied by much lower rainfall, totaling 31 mm (1.2 in) over just 6 days. The humidity also increases to 85%, contributing to the crisp and often chilly atmosphere. For more specific insights, you can visit Okoboji weather in November.
September and December present a stark contrast in weather conditions. In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 32°C (91°F), with an average of 18°C (65°F) and a notable humidity level of 75%. The month sees considerable precipitation, totaling 113 mm (4.5 in) over approximately 9 days. In comparison, December experiences a much colder climate, with temperatures dropping to as low as -24°C (-11°F) and peaking at 18°C (64°F), averaging -3°C (26°F). Precipitation is significantly reduced to 40 mm (1.6 in), occurring on just 4 days, while humidity rises slightly to 83%. For more detailed information, you can check Okoboji weather in December.
As September rolls into Okoboji, the weather begins to shift from the warmth of summer to the crispness of fall. While temperatures can still peak at a pleasant 32°C (91°F), the average cools down to a more moderate 18°C (65°F), offering a refreshing reprieve from the summer heat. This transitional month typically sees increased humidity levels around 75%, paired with about 113 mm (4.5 in) of precipitation over roughly 9 days, signaling the start of autumn rains. These shifts create a unique environment, perfect for enjoying the natural beauty of the changing leaves and the tranquil lakeside ambiance. For those interested in delving deeper into the ever-evolving climate of this charming region, visit Okoboji Climate.