Last updated: August 27, 2025
In September, Deventer, Netherlands experiences a delightful blend of warm days and cooler nights. With maximum temperatures peaking at 31°C (88°F) and an average of 15°C (59°F), the month offers a refreshing transition into autumn. However, evenings can be brisk, dropping to a minimum of 3°C (37°F). Rain is not uncommon, with 62 mm (2.4 in) of precipitation spread across 10 days, contributing to the region's lush greenery. The humidity level remains relatively high at 83%, enhancing the freshness of the crisp September air. Whether you’re savoring sunny afternoons or enjoying the serenity of rain-soaked streets, Deventer in September promises a captivating start to the fall season.
In September, Deventer experiences a beautiful transition as summer gradually gives way to autumn. With minimum temperatures around 3°C (37°F) and averages settling at a comfortable 15°C (59°F), the month offers a pleasant reprieve from the heat of the summer months. The maximum temperatures can still soar to a warm 31°C (88°F), providing ample opportunities for outdoor activities and enjoying the vibrant fall foliage. As the days grow shorter and cooler, September sets the stage for the crisp air and colorful scenery that characterize the Dutch autumn, making it an ideal time for excursions and exploring the charm of this historic city.
In September, Deventer experiences a precipitation amount of 62 mm (2.4 in), mirroring the earlier months of the year, with rainfall similar to January and May. With just 10 days of precipitation, this month is notably drier than the more rain-soaked August, which recorded 84 mm (3.3 in) over 15 days. This transition from summer’s highest rainfall to the steadier autumn pattern hints at a gradual shift in weather, setting the stage for October’s expected increase in precipitation at 81 mm (3.2 in). Overall, September acts as a gentle bridge, balancing between the lush, moisture-laden summer and the upcoming wetter fall.
In September, Deventer's humidity levels typically settle at 83%, marking a slight rise from the drier summer months of July and August, where humidity consistently hovered around 75%. This transition into fall is characterized by a gradual increase in moisture, which leads to a more comfortable ambiance as the summer heat wanes. As the year progresses, the humidity continues to climb again, peaking in the winter months, with January and February consistently maintaining a high 88%. The steady fluctuation of humidity throughout the year highlights Deventer's maritime climate, offering both lush summers and distinctly crisp winters.
As summer fades into autumn, September in Deventer sees a moderate UV Index of 5, marking a shift from the very high levels experienced in July and June. With a burn time of 30 minutes, this month invites residents and visitors to enjoy the outdoors while still taking precautions against sun exposure. Although the intensity decreases compared to the peak summer months, it's essential to remain mindful of UV radiation, especially as the sun begins to play hide-and-seek behind the clouds. Overall, September serves as a gentle reminder to savor the last warm days while being sun-smart. For detailed information, check the Deventer UV Index.
UV Risk Categories
As summer transitions to autumn, September in Deventer shines with an impressive 314 hours of sunlight, making it one of the brighter months of the year. This month enjoys a slight dip compared to the sun-soaked heights of July and August, which basked in over 400 hours. Interestingly, September still surpasses the earlier months, with daylight hours significantly increasing from the winter lows of January's meager 103 hours. The gradual decline in sunlight heralds the approach of cozier months, yet September's warmth and brightness provide a delightful blend of lingering summer vibes and the crisp promise of fall. Embrace the sun while it lasts, as it gracefully retreats into the shorter days of October.
In September, Deventer experiences a 31% chance of sunny weather, which reflects a slight decline from the summer months, where sunshine is more frequent. This trend, however, is not drastic, as September maintains a favorable position compared to the overall year, particularly following the radiant days of August. As the season transitions, the probability of sun starts to taper off gently, setting the stage for the more overcast months ahead. While September may not shine as brightly as the peak summer months, it still offers a pleasant mix of sunny spells that invite outdoor activities and leisurely strolls through the charming streets of Deventer.
As September unfolds in Deventer, Netherlands, the days begin to shorten, bringing a notable shift from the long, sunlit summer months. With 12 hours of daylight, the city experiences a gentle decline from August’s 14 hours, signaling the transition into autumn. This gradual reduction highlights a clear trend: daylight duration peaks in the summer, with June and July enjoying 16 hours, before tapering off. The steady descent continues into October, reflecting nature's rhythm as it prepares for the quieter, darker months ahead. As daylight wanes, the vibrant hues of autumn foliage come alive, inviting residents and visitors alike to savor the changing seasons.
As the summer warmth begins to wane in September, Deventer experiences a gentle shift in its wind patterns. With an average wind speed of 3.0 m/s (7 mph), this month marks a subtle decline from the breezier summer months, showcasing the tranquil transition into autumn. In contrast to the previous months, where winds tended to be slightly stronger, September's breezes offer a softer touch, inviting residents and visitors alike to enjoy the crisp air and beautiful changing leaves. This mellow wind speed foreshadows the cooler gusts that will roll in during October, hinting at the seasonal transformations that characterize the enchanting climate of the Netherlands.
Weather in Deventer varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Deventer, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather conditions. In September, temperatures fluctuate from a minimum of 3°C (37°F) to a warm maximum of 31°C (88°F), with an average of 15°C (59°F). The month experiences 62 mm (2.4 in) of precipitation over about 10 days, coupled with a humidity level of 83%. In contrast, January is much colder, featuring a minimum temperature of -9°C (17°F) and a maximum of 14°C (58°F), with an average temperature of just 4°C (39°F). This winter month also receives 62 mm (2.4 in) of precipitation but over a longer duration of 13 days, and humidity rises slightly to 88%. For a more detailed overview of January weather, you can check Deventer weather in January.
September and February present striking contrasts in weather. In September, temperatures range from a mild 3°C (37°F) at night to a warm peak of 31°C (88°F) during the day, with an average of 15°C (59°F). The month experiences about 62 mm (2.4 in) of precipitation over roughly 10 days, accompanied by a humidity of 83%. In contrast, February is much colder, with temperatures dipping as low as -15°C (6°F) at night and reaching a maximum of 18°C (65°F), averaging only 4°C (40°F). While February sees slightly more precipitation at 71 mm (2.8 in) over 12 days, the humidity increases to 88%, adding to the chill in the air. For more detailed information, check out Deventer weather in February.
In comparing the weather between September and March, clear differences emerge. September generally offers warmer temperatures, with a minimum of 3°C (37°F) and an average of 15°C (59°F), reaching a maximum of 31°C (88°F), while March typically starts much cooler, with temperatures dropping as low as -8°C (17°F) and averaging around 7°C (44°F) with a maximum of 21°C (71°F). Precipitation levels are relatively similar, with September receiving 62 mm (2.4 in) over about 10 days and March slightly higher at 71 mm (2.8 in) across 15 days. Additionally, humidity is slightly elevated in both months, at 83% in September and 86% in March. For a more detailed look at March conditions, you can visit Deventer weather in March.
In September, the weather is typically warmer, with average temperatures reaching around 15°C (59°F) and highs peaking at 31°C (88°F). This month also experiences a moderate amount of precipitation, totaling 62 mm (2.4 in) over approximately 10 days, with humidity levels lingering around 83%. In contrast, April tends to be cooler, with minimum temperatures dropping to -4°C (26°F) and an average of 9°C (49°F). Though temperatures can rise to a pleasant 28°C (82°F), the month sees less rainfall, with only 37 mm (1.5 in) over about 9 days, while the humidity remains relatively high at 84%. For a more detailed look at the weather in this spring month, you can visit Deventer weather in April.
In comparing the weather of September and May, both months exhibit a similar maximum temperature, with September reaching up to 31°C (88°F) and May slightly higher at 31°C (89°F). However, September averages a warmer temperature of 15°C (59°F) compared to May's average of 14°C (57°F). Interestingly, September experiences slightly more precipitation, with 62 mm (2.4 in) over 10 days, while May sees 64 mm (2.5 in) across 14 days, making May the wetter of the two months in terms of rainy days. Humidity levels are also similar, with September at 83% and May slightly lower at 80%. For a more detailed look into May's weather, visit Deventer weather in May.
In comparing the weather of September and June, we find notable differences in temperature and humidity. September experiences a broader temperature range, with a minimum of 3°C (37°F) and a maximum of 31°C (88°F), leading to an average of 15°C (59°F). In contrast, June has a milder minimum of 7°C (44°F) and a higher maximum of 35°C (95°F), resulting in an average temperature of 18°C (65°F). Although September has slightly less precipitation at 62 mm (2.4 in) over 10 days compared to June's 69 mm (2.7 in) over 11 days, it is accompanied by a higher humidity level of 83% compared to June's 75%. For more detailed information, you can visit Deventer weather in June.
In comparing the weather of September to that of July, we see notable differences in temperature and precipitation patterns. September experiences a broader range of temperatures, with a minimum of 3°C (37°F), an average of 15°C (59°F), and a maximum of 31°C (88°F), while July tends to be warmer, featuring a minimum of 7°C (44°F), an average of 19°C (66°F), and a peak maximum of 39°C (103°F). Additionally, July records higher precipitation at 80 mm (3.1 in) over 12 days compared to September's 62 mm (2.4 in) over 10 days. Humidity levels in September are also higher at 83%, while July has a slightly lower humidity of 75%. For more detailed information on July weather, check out Deventer weather in July.
In September, the weather shows a notable decrease in temperature compared to August, with average highs dropping from 35°C (95°F) in August to 31°C (88°F) in September. Minimum temperatures also fall, ranging from a low of 7°C (45°F) in August to just 3°C (37°F) in September. Humidity levels are higher in September at 83%, while August experiences a more moderate 75%. Precipitation in September, while still significant at 62 mm (2.4 in) over 10 days, is less than in August, which sees 84 mm (3.3 in) over 15 days. For more details, check out Deventer weather in August.
September and October present distinct variations in weather conditions. In September, temperatures range from a minimum of 3°C (37°F) to a warm maximum of 31°C (88°F), with an average of 15°C (59°F). The month experiences moderate rainfall totaling 62 mm (2.4 in) over approximately 10 days, and humidity levels are relatively high at 83%. In contrast, October sees a drop in temperatures, with a minimum of 0°C (32°F) and an average of 12°C (54°F), peaking at 27°C (80°F). The precipitation increases to 81 mm (3.2 in) across 13 days, accompanied by slightly higher humidity at 86%. For a closer look at the specific weather patterns for October, you can visit Deventer weather in October.
September generally offers warmer temperatures, with average highs reaching up to 31°C (88°F), while November sees a significant drop, with average temperatures peaking at just 19°C (67°F). The minimum temperatures in September rarely fall below 3°C (37°F), contrasting sharply with November's minimum of -3°C (26°F). Although September experiences slightly more precipitation at 62 mm (2.4 in) over 10 days, November follows closely with 51 mm (2.0 in) over 11 days. Humidity levels also rise from September's 83% to November's 87%, contributing to the overall cooler and more damp conditions as autumn progresses. For more detailed insights, you can explore Deventer weather in November.
September and December present stark contrasts in weather patterns. In September, temperatures range from a minimum of 3°C (37°F) to a pleasant average of 15°C (59°F), with highs reaching up to 31°C (88°F). The month sees about 62 mm (2.4 in) of precipitation over approximately 10 days, accompanied by a relatively high humidity of 83%. In contrast, December experiences much colder conditions, with temperatures dipping to a minimum of -5°C (22°F) and averaging around 5°C (41°F); the maximum temperature only reaches about 14°C (58°F). This month also has increased precipitation, totaling 85 mm (3.3 in) over 16 days, and slightly higher humidity at 86%. For more detailed insights, check Deventer weather in December.
As summer fades and autumn begins, September in Deventer offers a unique blend of warmth and renewal, transitioning from the sweltering heat of August to cooler, crisper days. The temperatures are markedly milder with an average that invites outdoor exploration while the increase in humidity signals the approach of fall. Rainfall becomes more frequent, adding a refreshing touch to the landscape, though it can occasionally dampen plans. This month’s weather stands out for its dynamic shift, reminding us that the changing seasons bring a fresh perspective to the beauty of Deventer. For a deeper insight into what to expect throughout the year, visit Deventer Climate.