Last updated: August 27, 2025
Discover the captivating September weather in Bolu, Turkey, where temperatures fluctuate between a maximum of 34°C (93°F) and a minimum of 1°C (34°F), creating a unique blend of warm days and cool nights. The average temperature rests at a comfortable 16°C (62°F), making it an ideal time for outdoor exploration. Travelers can expect about 51 mm (2.0 in) of rainfall over 8 days, contributing to the lush landscapes that Bolu is renowned for. With a humidity level around 61%, the air is pleasantly refreshing, enhancing the vibrant beauty of this picturesque destination.
In Bolu, Turkey, September marks a significant transition in temperatures as summer fades and autumn approaches. With nighttime temperatures dipping to a chilly 1°C (34°F), the days still offer a warm respite with highs reaching up to 34°C (93°F). This month enjoys an average temperature of 16°C (62°F), providing a pleasant balance that invites both outdoor adventures and scenic exploration. The gradual shift from summer's peak towards cooler autumnal weather is evident, making September an ideal time to experience Bolu's natural beauty and vibrant landscapes before winter sets in. As leaves begin to change, the warmth of early fall still lingers, promising both sunny days and refreshing evenings.
September in Bolu, Turkey, transitions into autumn with a modest precipitation total of 51 mm (2.0 in), marking a shift from the summer dryness. This month witnesses rain on approximately 8 days, reflecting a gradual increase in moisture compared to the drier summer months of July and August. The precipitation pattern is consistent with the seasonal trend in Bolu, where rainfall begins to pick up as temperatures cool, paving the way for the wetter months ahead. With September’s rains, nature starts to prepare for the vibrant fall foliage, creating a picturesque landscape in this charming region.
As summer fades and September arrives in Bolu, Turkey, the humidity levels shift noticeably. After peaking in the sweltering months of July and August, where humidity dropped to a comfortable 62% and 53%, September sees an uptick to 61%. This modest increase marks a transition towards the wetter autumn months, as the air begins to thicken with moisture in anticipation of the rainier season ahead. Overall, while September retains a relatively moderate humidity compared to the winter months, it signals the gradual return of a more humid atmosphere, moving back toward the 84% highs of winter.
In September, Bolu, Turkey, experiences a UV Index of 8, categorized as very high, resulting in a burn time of just 15 minutes for unprotected skin. This marks a gradual decline from the peak of summer, where the UV Index reached 11 in June and sustained 10 in both July and August. While September offers a slight respite, the UV rays remain potent, highlighting the importance of sun protection as outdoor activities continue. As autumn approaches, awareness of UV exposure remains crucial; after this month, the index will decrease further, leading into the more moderate levels of October. For detailed insights on UV exposure throughout the year, visit Bolu UV Index.
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September in Bolu, Turkey, offers a delightful transition as summer fades into autumn, boasting 341 hours of sunshine. This month reflects a gentle decline from the peak summer brilliance seen in July with its impressive 415 hours, and even August's vibrant 393 hours. As the days shorten, September still retains a substantial amount of sunlight, allowing visitors to savor the mild weather and enchanting landscapes. The gradual decrease in sunshine hours provides a perfect backdrop for exploring the lush greenery and picturesque scenery that Bolu is renowned for, making it an ideal time for outdoor adventures and leisurely strolls in nature. While October will see further reductions to 300 hours, September shines brightly as a bridge between the long sun-drenched days of summer and the quieter, cozy days of fall.
In September, Bolu, Turkey experiences a 42% chance of sunny weather, marking a shift from the peak summer months of July and August, which boast 60% and 64% chances, respectively. This decline leads into the more variable fall season, but September still retains a favorable likelihood of clear skies. Overall, the trend reveals that while sunlight diminishes from summer's heights, there's a notable resilience in September's weather, offering a pleasant blend of warmth and sunshine as autumn approaches. As the year progresses, this month stands out as a transitional period, hinting at both the lingering joys of summer and the crisp promise of fall.
As September unfolds in Bolu, Turkey, the city experiences a gentle transition in daylight, with approximately 12 hours of sunlight gracing each day. This month marks a subtle decline from the sun-drenched peaks of June and July, which boast 15 and 14 hours of daylight, respectively. Following the warmth of summer, September's light begins to wane, yet it still offers a generous amount of daylight compared to the creeping shadows of winter. As the days grow shorter, the gradual shift reflects nature's rhythm, with each month revealing the dance between light and darkness—September, perfectly poised between the lingering warmth of summer and the cool embrace of autumn, welcomes the arrival of longer nights ahead.
As summer transitions to autumn, September in Bolu, Turkey, ushers in a gentle shift in wind patterns. With an average wind speed of 1.8 m/s (4 mph), September experiences a slight decrease compared to the busy breezes of earlier months, yet still maintains a delicate atmosphere. This period follows the warmer summer months where wind speeds hovered around 2.0 m/s. Interestingly, September's winds are reminiscent of the tranquil vibes seen in June and August, hinting at a calming before the colder months arrive. As the autumn leaves begin to dance in the cooler air, residents and visitors can enjoy the serene, soft breezes that make this time of year uniquely inviting in Bolu.
Weather in Bolu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bolu, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present distinctly different weather conditions. In September, temperatures can range from a minimum of 1°C (34°F) to a maximum of 34°C (93°F), with an average of 16°C (62°F). This month experiences relatively moderate humidity at 61% and receives about 51 mm (2.0 in) of precipitation over approximately 8 days. In contrast, January is much colder, with temperatures dropping to a minimum of -19°C (-2°F) and averaging 0°C (32°F), while the maximum reaches only 17°C (63°F). This winter month sees increased precipitation, totaling 91 mm (3.6 in) spread across around 13 days, and a higher humidity level of 84%. For more detailed information, check out Bolu weather in January.
September and February present contrasting weather conditions. In September, temperatures average around 16°C (62°F), with a minimum of 1°C (34°F) and a maximum of 34°C (93°F), making it a warmer and more varied month. The precipitation is relatively low at 51 mm (2.0 in) over about 8 days, and humidity hovers around 61%. In stark contrast, February features a colder climate, with average temperatures dropping to 2°C (36°F), ranging between a frigid minimum of -16°C (3°F) and a maximum of 16°C (62°F). This month also experiences higher precipitation at 81 mm (3.2 in) spread over 13 days, accompanied by a notable increase in humidity at 85%. For more detailed insights, check out Bolu weather in February.
September and March present stark contrasts in weather, showcasing the transition from late summer to early spring. In September, temperatures can range from a cool 1°C (34°F) at night to a warm 34°C (93°F) during the day, with an average temperature of 16°C (62°F). This month also experiences relatively low precipitation at 51 mm (2.0 in) over about 8 days, along with moderate humidity at 61%.
In contrast, March is significantly colder, with nighttime lows plummeting to -19°C (-1°F) and daytime highs reaching up to 21°C (70°F), averaging around 4°C (40°F). The month sees higher precipitation levels totaling 116 mm (4.6 in) spread over 15 days, coupled with increased humidity at 84%. For a closer look at March weather specifics, you can check Bolu weather in March.
In comparing the weather of September and April, September stands out with a broader temperature range, featuring minimums around 1°C (34°F) and maximums reaching up to 34°C (93°F), resulting in an average temperature of 16°C (62°F). Contrarily, April experiences cooler temperatures with a minimum of -3°C (26°F) and a maximum of 23°C (73°F), leading to a lower average of 9°C (48°F). Additionally, April receives more precipitation, totaling 91 mm (3.6 in) over 14 days, compared to September's 51 mm (2.0 in) over just 8 days, contributing to higher humidity levels of 78% in April versus 61% in September. For more detailed insights into April weather, you can check Bolu weather in April.
In comparing the weather of September and May, September tends to be warmer, with average temperatures ranging from a minimum of 1°C (34°F) to a maximum of 34°C (93°F), while May experiences slightly cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 30°C (86°F). September also has lower precipitation levels, accumulating about 51 mm (2.0 in) over 8 days, whereas May sees significantly more rainfall, with 131 mm (5.2 in) over 17 days. Additionally, the humidity levels in May are higher at 78%, compared to September's 61%, making May feel more humid and damp. For more detailed information on weather conditions in May, you can visit Bolu weather in May.
September and June present distinct weather patterns, with September experiencing a broader temperature range. In September, temperatures can drop as low as 1°C (34°F) and rise to a high of 34°C (93°F), with an average of 16°C (62°F). In contrast, June's temperatures range from a minimum of 4°C (39°F) to a maximum of 27°C (82°F), averaging the same 17°C (62°F). Precipitation is another notable difference; September receives about 51 mm (2.0 in) over 8 days, while June sees significantly more rain, totaling 129 mm (5.1 in) over 19 days. Consequently, humidity levels are also higher in June at 71%, compared to September's 61%. For additional information about June weather, you can visit Bolu weather in June.
When comparing the weather in September to July, we see notable differences in temperature and precipitation patterns. September experiences a wider temperature range, with a minimum of 1°C (34°F) and a maximum of 34°C (93°F), giving it an average of 16°C (62°F). In contrast, July's temperatures are generally milder, with a minimum of 7°C (45°F), an average of 19°C (67°F), and a maximum of 31°C (88°F). Additionally, September receives slightly less precipitation, with 51 mm (2.0 in) across 8 days, compared to July's 71 mm (2.8 in) over 11 days. Both months have similar humidity levels, around 61% for September and 62% for July, indicating a relatively humid atmosphere year-round. For more detailed insights, you can check out Bolu weather in July.
In comparing the weather of September to August, September experiences a broader temperature range, with minimums dropping to 1°C (34°F) while maintaining an average of 16°C (62°F) and reaching a maximum temperature of 34°C (93°F). In contrast, August starts off warmer with minimum temperatures around 9°C (48°F) and an average of 20°C (68°F), peaking at 33°C (92°F). Additionally, September sees slightly more precipitation at 51 mm (2.0 in) over 8 days, compared to August's 43 mm (1.7 in) over 7 days. Humidity levels also rise in September to 61%, compared to August's lower 53%. For more details on summer weather trends, you can check Bolu weather in August.
September and October showcase a noticeable shift in weather patterns. September boasts a wider temperature range, with minimums of 1°C (34°F) and maximums reaching up to 34°C (93°F), resulting in an average of 16°C (62°F). In contrast, October experiences cooler temperatures, featuring minimums dropping to -2°C (29°F) and an average of 12°C (54°F), although it still warms up to a comfortable maximum of 29°C (85°F). Precipitation also increases in October to 78 mm (3.1 in) over 9 days, compared to September's 51 mm (2.0 in) over 8 days, and humidity rises from 61% in September to 76% in October. For a detailed look at the weather specifics for October, you can check out Bolu weather in October.
September and November present contrasting weather patterns, with September exhibiting a broader temperature range and generally milder conditions. In September, temperatures swing from a minimum of 1°C (34°F) to a maximum of 34°C (93°F), with an average of 16°C (62°F), making it a more fluctuating month. By contrast, November sees cooler temperatures, with a minimum of -6°C (21°F) and a maximum of 21°C (69°F), resulting in an average of only 7°C (44°F). Additionally, November experiences slightly more precipitation at 59 mm (2.3 in) over 8 days, compared to September’s 51 mm (2.0 in) during the same number of days. The humidity also rises in November, reaching 83%, up from September's 61%. For more detailed insights, you can check Bolu weather in November.
September and December present strikingly different weather patterns. In September, temperatures range from a mild minimum of 1°C (34°F) to a warm maximum of 34°C (93°F), with an average of 16°C (62°F). The month sees relatively light precipitation, totaling 51 mm (2.0 in) over about 8 days, combined with a moderate humidity level of 61%. In sharp contrast, December experiences much colder conditions, with temperatures dropping to a minimum of -13°C (9°F) and an average of just 3°C (39°F), peaking at a maximum of 16°C (62°F). This month also has significantly more precipitation, totaling 117 mm (4.6 in) over 16 days and higher humidity at 85%. This shift highlights the transition from late summer warmth to winter chill, making December a markedly different experience. For more details, check out Bolu weather in December.
As September rolls in, Bolu experiences a fascinating transition in weather, distinguishing itself from the hotter summer months. The temperatures begin to cool, presenting a refreshing average but still peaking at a comfortable warmth. While the minimum drops significantly, bringing a crisp feel to the early mornings, the days can still surprise you with balmy afternoons. With 51 mm of precipitation across about eight days, there's a gentle shift towards the wetter autumn season, adding a lush vibrancy to the landscape. The humidity, hovering at 61%, complements this seasonal change, making September in Bolu a unique blend of warmth and freshness. Discover more about the area's climate in detail at Bolu Climate.