Last updated: August 21, 2025
Experience the enchanting September weather of Rila, Bulgaria, where temperatures can soar to a pleasant 30°C (86°F) during the day, while the average lingers around a mild 15°C (59°F). As night falls, prepare for cooler conditions, with temperatures dipping as low as -2°C (28°F). This month sees a moderate precipitation of 38 mm (1.5 in) spread over approximately 5 days, adding a refreshing touch to the landscape. With an average humidity of 59%, the atmosphere is comfortable, making September a delightful time to explore the natural beauty and cultural heritage of Rila.
September in Rila, Bulgaria, is a delightful bridge between summer's warmth and autumn's chill. With temperatures ranging from a brisk -2°C (28°F) at night to a pleasant 30°C (86°F) during the day, visitors can enjoy the best of both worlds. The average temperature hovers around 15°C (59°F), making it an ideal time for outdoor adventures in the stunning mountain landscapes. As the month progresses, the cooler nights begin to hint at the impending autumn, while the lingering warmth of summer days invites hiking, exploring, and basking in nature's beauty. This transitional period not only showcases a remarkable shift in temperatures but also sets the stage for the breathtaking fall foliage that Rila is known for.
September brings a noticeable shift in precipitation patterns in Rila, Bulgaria, with only 38 mm (1.5 in) of rainfall over 5 days, marking a significant decline from the wetter summer months. This decrease follows a trend observed from the peak precipitation in June, which recorded 141 mm (5.6 in) across 20 days. As summer recedes, so do the rain showers, leaving September as one of the driest months of the year, typically indicating the onset of autumn. This shift not only impacts local vegetation but also sets the stage for a drier October, where precipitation slightly increases but remains relatively low.
In September, Rila, Bulgaria, experiences a notable shift in humidity, with levels averaging around 59%. This marks a gradual rise from the drier summer months, where August boasts a refreshing 50% humidity. As the year transitions towards autumn, humidity levels begin to climb, foreshadowing the wetter months ahead. Notably, this trend of increasing humidity continues into the fall, culminating in October's higher levels at 79%. Overall, September serves as a pivotal month, bridging the drier summer conditions and the moisture-laden atmosphere typical of late autumn, creating a comfortable yet refreshing environment for residents and visitors alike.
As summer gives way to autumn in Rila, Bulgaria, September marks a notable transition in the UV Index, with a reading of 8 indicating a very high exposure level. This slight dip from the peak summer months—where July and June also registered a UV Index of 10—suggests that while sunburn risk remains significant, it is a bit more manageable compared to the sweltering heights of July. With an approximate burn time of just 15 minutes, it’s essential for outdoor enthusiasts to remain vigilant, shielded with sunscreen and protective clothing. Interestingly, the trend shows that after a warm and intense summer, the UV Index begins to decline, paving the way for milder months ahead. For those keen to monitor the UV levels as summer fades, check out Rila UV Index.
UV Risk Categories
September in Rila, Bulgaria, offers a charming retreat as summer gives way to autumn, providing 343 hours of sunshine that reflect a delightful transition. Following the peak of summer, where July basked in an impressive 424 hours of sunlight, September maintains a warm glow while beginning to cool down. This month sees sunlight levels gently declining, yet they remain comfortably above those of the earlier months like January and February, which barely scrape by with 175 and 239 hours, respectively. As the days grow shorter, September's ample sunshine invites both locals and visitors to savor the stunning natural beauty of Rila, making it an ideal time to explore the picturesque landscapes before the chill of autumn fully sets in.
September in Rila, Bulgaria, offers a 53% chance of basking in the sun, marking a slight dip from the sun-drenched months of July and August, which boast impressive probabilities of 71% and 76% respectively. As summer transitions into autumn, the likelihood of clear skies remains moderate, suggesting that September is still a favorable time for outdoor activities. This month tends to bridge the long sunny days of summer with the cooler, cloudier weather that follows in October. Overall, visitors can anticipate a mix of sunshine and variability, making September a delightful period to enjoy the stunning scenery of Rila.
As September arrives in Rila, Bulgaria, the daylight begins to wane, offering about 12 hours of sunlight—a slight decrease from the vibrant 14 hours experienced in May and June. This transition signals a shift towards the cozy embrace of autumn, as the days progressively shorten leading into October. Throughout the year, Rila showcases a beautiful cycle, starting with 9 hours of light in January and peaking at 15 hours in June, before gracefully descending back to shorter days. This rhythm not only enriches the natural beauty of the region but also invites residents and visitors alike to savor the last warm evenings of summer before the cooler days of autumn set in.
As September unfolds in Rila, Bulgaria, the gentle whispers of wind persist with an average speed of 1.7 m/s (4 mph), mirroring the preceding months of June, July, and August. This consistent breeze creates a serene atmosphere as summer transitions into autumn, offering a refreshing contrast to the warmer season. Notably, the wind speeds show a slight dip in June, yet regain steadiness in the following months—a reminder of the tranquil yet unyielding nature of this mountainous region. As October approaches, the winds remain stable, hinting at a seamless continuation of this pleasant, brisk air that characterizes the early autumn months in Rila.
Weather in Rila varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rila, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures in Rila are mild, with an average of 15°C (59°F) and a max of 30°C (86°F), making it a pleasant time of year. The weather is relatively dry, with only 38 mm (1.5 in) of precipitation over about 5 days and humidity sitting at around 59%. In contrast, January brings much colder conditions, with average temperatures dropping to -2°C (28°F) and highs reaching only up to 11°C (52°F). Snow and sleet are more common during this time, contributing to a total precipitation of 64 mm (2.5 in) over approximately 10 days, along with higher humidity levels of 89%. For a closer look at January's weather patterns, you can check Rila weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a chilly -2°C (28°F) at night to a warm 30°C (86°F) during the day, with an average temperature of 15°C (59°F). It is relatively dry with only 38 mm (1.5 in) of precipitation over about 5 days, accompanied by a moderate humidity level of 59%. In comparison, February brings much colder conditions, with temperatures plummeting to a low of -21°C (-5°F) and only reaching a maximum of 16°C (60°F), averaging just 1°C (34°F). The month sees more precipitation at 57 mm (2.2 in) spread over 10 days, along with higher humidity at 85%. For more specific details on February conditions, you can check Rila weather in February.
September and March showcase stark contrasts in weather patterns. September experiences a broader range of temperatures, with a minimum of -2°C (28°F) and a maximum of 30°C (86°F), resulting in an average of 15°C (59°F). The month also sees relatively low precipitation, at 38 mm (1.5 in) over about five days and a moderate humidity of 59%. In contrast, March is much colder, with temperatures ranging from a minimum of -17°C (1°F) to a maximum of 19°C (67°F), averaging at just 3°C (39°F). It is also wetter, with precipitation totaling 92 mm (3.6 in) spread over 14 days, accompanied by higher humidity at 83%. For more detailed insights on March weather conditions, you can visit Rila weather in March.
In September, temperatures range from a chilly minimum of -2°C (28°F) to a warm maximum of 30°C (86°F), showcasing a pleasant average of 15°C (59°F). The month experiences moderate precipitation of 38 mm (1.5 in) over about 5 days, with humidity levels around 59%. In contrast, April is notably cooler, with temperatures dipping as low as -8°C (18°F) and peaking at 23°C (73°F), averaging just 8°C (47°F). This month sees increased rainfall, totaling 70 mm (2.8 in) across 12 days, accompanied by higher humidity at 71%. For those curious about weather specifics in April, visit Rila weather in April.
When comparing the weather in September and May, it's clear that both months offer distinct experiences. September features a broader temperature range, with nighttime lows dropping to -2°C (28°F) and daytime highs reaching up to 30°C (86°F), providing pleasant warmth for outdoor activities. In contrast, May presents milder temperatures with a minimum of 0°C (32°F) and a maximum of 27°C (81°F), creating a more moderate atmosphere.
Precipitation levels also differ significantly; September sees 38 mm (1.5 in) of rain over just 5 days, while May experiences a higher total of 106 mm (4.2 in) spread across 17 days, contributing to the month's increased humidity, which averages at 73% compared to September's 59%. For more detailed insights on May's weather, consider visiting Rila weather in May.
In comparing the weather between September and June, we can observe notable differences in temperature and precipitation levels. September often features a wider temperature range, with minimums dropping to -2°C (28°F) and maximums reaching up to 30°C (86°F). The average temperature sits comfortably at 15°C (59°F) and the month sees precipitation of about 38 mm (1.5 in) spread over just 5 days, resulting in a humidity level of 59%.
In contrast, June tends to be warmer overall, with minimum temperatures around 4°C (39°F) and a maximum that can rise to 31°C (87°F). The average temperature is slightly higher at 16°C (61°F), but this month experiences significantly more rainfall, totaling 141 mm (5.6 in) over approximately 20 days, which contributes to higher humidity at 67%. For further insights on June weather, you can check this link: Rila weather in June.
In September, the weather experiences a noticeable shift compared to July. While July boasts warmer temperatures with an average of 19°C (66°F) and peaks reaching 32°C (90°F), September presents a broader temperature range, seeing a minimum of -2°C (28°F) and an average of 15°C (59°F). Additionally, September is characterized by lower overall humidity at 59%, compared to July’s higher humidity level of 68%. Precipitation also differs significantly, with September receiving 38 mm (1.5 in) over 5 days, while July sees a total of 84 mm (3.3 in) over 11 days. For more specifics on weather conditions, you can check out Rila weather in July.
In comparing the weather of September and August, September features a wider temperature range with minimums dropping to -2°C (28°F) and maximums reaching 30°C (86°F), while August has a milder minimum of 8°C (46°F) and a higher maximum of 32°C (91°F). The average temperature in September is cooler at 15°C (59°F), compared to August's average of 19°C (67°F). Rainfall is slightly less in September, with 38 mm (1.5 in) over 5 days, compared to August's 45 mm (1.8 in) over 7 days, indicating a drier start to fall. Additionally, September experiences higher humidity at 59%, while August remains more comfortable at 50%. For a detailed look at August weather, you can visit Rila weather in August.
September and October present distinct shifts in weather patterns. In September, temperatures vary from a chilly minimum of -2°C (28°F) to a warm maximum of 30°C (86°F), with an average of 15°C (59°F) and relatively low precipitation of 38 mm (1.5 in) over 5 days. Humidity levels during this month hover around 59%, making for a pleasant early autumn.
Conversely, October sees a drop in average temperature, with a minimum of -4°C (26°F) and a maximum of 27°C (80°F), resulting in an overall average of 10°C (50°F). This month also experiences increased precipitation, totaling 56 mm (2.2 in) across 6 days, along with heightened humidity levels reaching 79%. The cooler, wetter conditions mark a transition into more typical fall weather. For more details on October conditions, visit Rila weather in October.
In September, the weather tends to be milder, with temperatures ranging from a minimum of -2°C (28°F) to a maximum of 30°C (86°F) and an average of 15°C (59°F). The month sees relatively low precipitation at 38 mm (1.5 in) over about 5 days, along with a humidity level of 59%. In contrast, November experiences colder temperatures, with a minimum of -11°C (13°F) and a maximum of 21°C (71°F), averaging around 5°C (42°F). This month is wetter, receiving 48 mm (1.9 in) of precipitation over 8 days and higher humidity at 87%. For a more detailed look at weather conditions in November, you can refer to Rila weather in November.
In comparing the weather of September and December, a significant transformation occurs as the seasons shift. September enjoys milder temperatures, with averages around 15°C (59°F) and highs reaching up to 30°C (86°F), while precipitation is relatively low at 38 mm over just five days. In contrast, December sees much chillier conditions, with an average temperature of 1°C (33°F) and lows plummeting to -21°C (-5°F). This month also experiences increased precipitation, totaling 91 mm across 12 days, and higher humidity levels at 89%. For more detailed insights into the December weather, you can explore Rila weather in December.
As September settles into Rila, the transition from summer to autumn becomes evident, bringing a unique blend of mild temperatures and refreshing humidity that makes this month particularly enchanting. With average highs reaching up to 30°C while still allowing for cooler evenings, September offers a comfortable climate that is perfect for outdoor exploration. The slight uptick in precipitation, with rain drizzling over about five days, adds a fresh vibrancy to the landscape, setting it apart from the drier summer months. As nature prepares for the seasonal shift, September in Rila is a delightful harmony of warmth and refreshment, inviting visitors to experience its beauty before the chill of winter sets in. For an in-depth look at the weather patterns throughout the year, check out Rila Climate.