September Weather in Kalofer, Bulgaria

Last updated: August 21, 2025

Experience the enchanting September weather in Kalofer, Bulgaria, where average temperatures hover around a comfortable 19°C (66°F). This month showcases a striking maximum temperature of 34°C (94°F), making it ideal for outdoor adventures, while nights can dip to a brisk 1°C (34°F), perfect for cozy evenings. With a modest precipitation amount of 20 mm (0.8 in) spread across 4 days, the humidity level of 59% adds a refreshing touch to the atmosphere. Embrace the beauty of this transitional season, where Kalofer offers a delightful blend of warm days and cooler nights.

September Temperature in Kalofer

In September, Kalofer, Bulgaria, experiences a delightful transition from the heat of summer to the cooler embrace of autumn. With minimum temperatures hovering around 1°C (34°F) and maximums reaching up to 34°C (94°F), the weather offers a comfortable average of 19°C (66°F), ideal for outdoor activities. This month marks a significant decline from the sweltering heights of August, which can peak at an impressive 39°C (102°F), yet still retains warmth and brightness, making it a perfect time for visitors to enjoy the stunning landscapes and rich cultural heritage of the region. As the days gradually shorten, the crispness of the evenings hints at the approaching fall, creating a perfect blend of summer’s warmth and autumn’s charm.

September Weather in Kalofer: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Kalofer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kalofer, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec333843526168727466554638
Data source: Temperature data for Kalofer generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Kalofer

September in Kalofer, Bulgaria, marks a significant shift in the region's weather patterns, as the average precipitation drops to 20 mm (0.8 in), making it one of the driest months of the year. With only 4 days of recorded rain, this decrease contrasts sharply with the more vibrant summer months, where rainfall peaks in June and July. The transition toward autumn brings clearer skies and crisp air, as the intense summer storms give way to milder conditions, preparing the landscape for the wetter months ahead. This trend highlights a typical seasonal progression, allowing Kalofer to settle into a tranquil period before the arrival of October's 58 mm (2.3 in) of rainfall.

September Precipitation Trends in Kalofer

The chart displays monthly precipitation patterns in Kalofer, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Kalofer, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec43427049721191003720585371
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kalofer

As September rolls into Kalofer, Bulgaria, humidity levels begin to stabilize, offering a refreshing contrast to the drier summer months. With a humidity of 59%, September marks a noticeable increase from August's low of 50%, signaling the gradual transition into the wet season. This month serves as a bridge between the warm summer and the approaching crispness of autumn, highlighted by a return to more comfortable humidity levels as they climb toward the higher averages seen in the fall and winter months. The pattern of humidity here reflects a broader trend: a steady decline from the high percentages of winter and early spring, reaching their lowest point in mid-summer, followed by a subtle rise as nature prepares for the seasonal shift.

September Average Humidity in Kalofer

This chart illustrates the average monthly humidity levels in Kalofer, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Kalofer is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%85%83%71%73%67%68%50%59%79%87%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kalofer

As summer fades into autumn, the UV Index in Kalofer, Bulgaria, begins to decline. In September, the UV Index is recorded at 7, indicating a high exposure category, with a burn time of 25 minutes—a slight drop from the peak levels of July and August. This transition highlights that while the sunlight is still strong, it's more manageable compared to the intense summer months. October follows closely with a UV Index of 6, maintaining a high category but further decreasing the burn time to 25 minutes. As the days shorten and the sun's strength diminishes, it’s crucial to remain mindful of sun safety, especially on bright days. For detailed information, check the full report at Kalofer UV Index.

Maximum UV Index Levels in Kalofer for September

The chart shows the monthly maximum UV Index (UVI) for Kalofer in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Kalofer typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2468910997632
Data source: Kalofer September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Kalofer

As summer fades and autumn begins, September brings a delightful balance of sunshine to Kalofer, Bulgaria, with an impressive 344 hours of sunlight gracing the month. This is a gentle decline from the blazing 427 hours in July, yet it remains vibrant compared to the chillier months ahead. The light begins to mellow, which beautifully contrasts the warmth of late summer, making September a perfect time for outdoor pursuits. Following the peak of June and July, with their record sunshine, the arrival of autumn signals not just fewer hours of sunlight but also the anticipation of a colorful change in nature, inviting both locals and visitors to savor the lingering warmth before winter draws near.

Monthly Sunshine Duration in Kalofer: September Highlighted

The September sunshine duration represents the total number of hours Kalofer experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec176h237h288h346h393h400h427h403h344h291h232h220h
Data source: Kalofer September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Kalofer During September

In Kalofer, Bulgaria, September boasts a 53% chance of sunny weather, marking a transition from the high summer sunshine of July and August, which see impressive probabilities of 78% and 75%, respectively. This early autumn month stands out for its blend of lingering warmth and emerging fall charm, making it a delightful time for outdoor activities. Following the more temperate months of April through June, which hover around a 45% chance, September offers a noticeable uplift, hinting at the gradual shift towards the cooler, cloudier days of October, characterized by a 40% chance of sunshine. Enjoy the radiant days while they last, as the sun begins to retreat!

Percentage of Sunny Days in September in Kalofer

The chart illustrates the percentage of sunny days in Kalofer throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Kalofer experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec29%49%47%45%45%47%78%75%53%40%33%33%
Data source: Kalofer September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Kalofer in September

As summer gives way to autumn, September in Kalofer, Bulgaria offers a gentle transition with an average of 12 hours of daylight. This marks a slight decrease from the peak summer months of June and July, which bask in 15 and 14 hours of sunlight respectively. Following the vibrant blooms of May and the long, sun-soaked days of summer, September’s daylight duration begins to shift, echoing the gradual descent into winter. As the leaves start to change, a comforting balance of light remains, inviting residents and visitors alike to enjoy the lingering warmth of early fall before the daylight dwindles further into the year.

Average Daylight Hours in Kalofer for September

The chart illustrates the variation in daylight duration in Kalofer throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 27m10h 33m11h 57m13h 23m14h 36m15h 13m14h 53m13h 49m12h 26m11h 1m9h 45m9h 6m
Data source: Kalofer daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Kalofer

As summer yields to autumn in Kalofer, Bulgaria, September presents a gentle transition marked by an average wind speed of 1.6 m/s (4 mph). This month maintains the subdued breeziness observed throughout the summer, closely resembling the wind patterns of both August and October. Interestingly, despite its proximity to the blustery months of January through May, September's winds are among the calmest of the year, suggesting a serene close to the warm seasons. As nature shifts gears, the consistency of the light winds offers a tranquil backdrop, inviting residents and visitors alike to embrace the subtle beauty of early autumn.

Average September Wind Speed in Kalofer

The chart displays monthly wind speed patterns in Kalofer, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.91.71.91.71.91.51.91.61.6 m/s1.51.41.9
Data source: Kalofer September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Kalofer Compares to Other Months

Weather in Kalofer varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kalofer, focusing on differences in temperature, rainfall, humidity, and UV levels.

September and January present starkly contrasting weather conditions. In September, temperatures range from a minimum of 1°C (34°F) to a warm average of 19°C (66°F), peaking at a sweltering 34°C (94°F), while precipitation is light at 20 mm (0.8 in) over just 4 rainy days, accompanied by a moderate humidity of 59%. In contrast, January experiences much colder weather, with temperatures plunging to a minimum of -18°C (-1°F) and an average high of just 1°C (33°F), reaching a maximum of 15°C (59°F). This month is also marked by increased precipitation at 43 mm (1.7 in) over 7 days and higher humidity levels at 89%. For more details on the winter weather conditions, check Kalofer weather in January.

September and February present starkly contrasting weather patterns. In September, temperatures range from a chilly 1°C (34°F) at night to a warm 34°C (94°F) during the day, with an average temperature of 19°C (66°F). The month sees relatively low precipitation of 20 mm (0.8 in) over just four days and an average humidity of 59%. In contrast, February brings much colder temperatures, with a minimum of -13°C (9°F) and a daily maximum of 19°C (66°F), averaging only 3°C (39°F). This winter month experiences higher precipitation totaling 42 mm (1.6 in), spread over seven days, and a noticeably humid environment with 85% humidity. For more details on February weather, you can check Kalofer weather in February.

In comparing the weather between September and March, one finds a striking contrast in temperatures and conditions. September boasts a comfortable climate with average temperatures hovering around 19°C (66°F), peaking at a warm 34°C (94°F), while precipitation is relatively low at just 20 mm (0.8 in) over four days. In stark contrast, March experiences much colder temperatures, averaging only 6°C (43°F) with a maximum of 22°C (72°F) and a chilling minimum of -20°C (-3°F). Additionally, March sees significantly higher precipitation, reaching 70 mm (2.7 in) over 11 days, and higher humidity levels at 83%. For a detailed look at Kalofer's weather specifics in March, visit Kalofer weather in March.

September and April present contrasting weather patterns. In September, temperatures range from a minimum of 1°C (34°F) to a maximum of 34°C (94°F), with an average of 19°C (66°F), offering warm days perfect for outdoor activities. In contrast, April experiences cooler temperatures, with a minimum of -3°C (28°F) and a maximum of 27°C (81°F), averaging just 11°C (52°F). Precipitation also differs significantly; September sees 20 mm (0.8 in) over just 4 days, while April has nearly double that with 49 mm (1.9 in) spread across 9 days. Additionally, April's humidity level of 71% surpasses September's 59%, contributing to a more damp and cooler atmosphere. For a closer look at April weather specifics in Kalofer, you can check Kalofer weather in April.

In September, the weather tends to be warmer with an average temperature of 19°C (66°F), ranging from a chilly 1°C (34°F) at night to a maximum of 34°C (94°F) during the day. The month experiences relatively low precipitation, with only 20 mm (0.8 in) falling over about 4 days, and average humidity sitting at 59%. In contrast, May is cooler with an average temperature of 16°C (62°F), featuring minimum temperatures of 3°C (38°F) and maximums reaching 31°C (87°F). However, it sees significantly more rainfall, totaling 72 mm (2.8 in) over 13 days, and higher humidity levels at 73%. For a more detailed look at the weather conditions in May, you can check out Kalofer weather in May.

When comparing the weather in June and September, significant differences emerge. September experiences a broader temperature range, with minimum temperatures dropping to 1°C (34°F) and maximums reaching up to 34°C (94°F), whereas June starts warmer with a minimum of 7°C (44°F) and peaks at 35°C (96°F). Precipitation patterns also diverge, as September has only 20 mm (0.8 in) of rain over just 4 days, while June sees considerably more rainfall at 119 mm (4.7 in) spread over 18 days. Additionally, June has a higher humidity level at 67%, compared to 59% in September, creating a more humid atmosphere during the earlier summer month. For a more detailed look at Kalofer weather, you can visit Kalofer weather in June.

In comparing the weather between September and July, it’s evident that July tends to be the hotter month. July features a minimum temperature of 11°C (52°F) and can reach a maximum of 37°C (99°F), with an average of 22°C (73°F). It also experiences significantly higher precipitation, with 100 mm (3.9 in) across 12 rainy days, contributing to a humidity level of 68%. In contrast, September boasts a broader temperature range, from a cool minimum of 1°C (34°F) to a warm maximum of 34°C (94°F), with an average temperature of 19°C (66°F). Precipitation is much lower in September, totaling 20 mm (0.8 in) over just 4 days and a humidity level of 59%. For more details, check out Kalofer weather in July.

In August, the weather is generally warmer with an average temperature of 23°C (74°F) and maximum highs reaching up to 39°C (102°F). This month also experiences more precipitation, totaling 37 mm (1.5 in) over 6 days and maintains a lower humidity level of 50%. In contrast, September sees a significant drop in temperatures, with averages around 19°C (66°F) and a maximum of 34°C (94°F). Precipitation decreases to 20 mm (0.8 in), occurring over just 4 days, while humidity rises to 59%. For more details on August weather, visit Kalofer weather in August.

In September, the weather features a wider temperature range, with minimums dropping to 1°C (34°F) and maximums peaking at a hot 34°C (94°F), alongside relatively low precipitation of 20 mm (0.8 in) over just 4 days. The average temperature during this month is a comfortable 19°C (66°F) with humidity at 59%. In contrast, October brings cooler temperatures, with an average of 13°C (55°F) and maximums reaching 31°C (88°F). This month sees increased precipitation of 58 mm (2.3 in) spread across 7 days, and higher humidity levels at 79%. For more detailed insights, you can check Kalofer weather in October.

September and November present distinct weather contrasts. In September, temperatures range from a mild 1°C (34°F) at night to a warm 34°C (94°F) during the day, with an average of 19°C (66°F). The month typically sees low precipitation, totaling 20 mm (0.8 in) over about 4 days, with a humidity level of 59%. In contrast, November ushers in cooler temperatures, with nighttime lows plunging to -4°C (26°F) and daytime highs reaching 25°C (77°F), averaging around 8°C (46°F). This month is also wetter, receiving 53 mm (2.1 in) of rainfall over 7 days and experiencing higher humidity at 87%. For more detailed insights into weather in November, visit Kalofer weather in November.

September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 1°C (34°F) at night to a warm 34°C (94°F) during the day, with an average temperature of 19°C (66°F). The month typically sees only about 20 mm (0.8 in) of precipitation over approximately four days and a humidity level of 59%. In contrast, December brings a chill to the air, with temperatures dipping significantly, ranging from a frigid -11°C (12°F) to a maximum of 16°C (62°F), averaging around 3°C (38°F). Precipitation increases to 71 mm (2.8 in) over ten days, accompanied by a higher humidity of 89%. For more details about the December weather in Kalofer, you can refer to this link: Kalofer weather in December.

Compare Kalofer's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Kalofer

As summer gracefully transitions into autumn, September in Kalofer showcases a delightful shift in weather characterized by milder temperatures and a refreshing touch of nature's bounty. With an average temperature that serenely settles at 19°C (66°F), residents and visitors alike can relish in the comfortable climate while enjoying outdoor activities. Unlike the sweltering heat of July and August, September offers a more balanced atmosphere, though occasional days still dip to cooler 1°C (34°F). With modest precipitation and a humidity level of 59%, this month paves the way for a picturesque landscape adorned in vibrant hues. For a deeper insight into Kalofer's year-round weather patterns, explore the detailed Kalofer Climate.