September Weather in Semmering, Austria

Last updated: February 26, 2025

In September, Semmering, Austria, showcases a picturesque blend of mild temperatures and dynamic weather patterns. With a maximum of 26°C (79°F) and an average of 13°C (55°F), the month offers a comfortable respite from the summer heat, though it can dip as low as -2°C (29°F) during the chilly nights. Expect 118 mm (4.6 in) of precipitation spread over 14 days, contributing to the region's lush landscapes. The humidity level sits at a moderate 65%, enhancing the vibrant hues of autumn as it unfolds. Whether you’re exploring the scenic trails or relaxing in the quaint alpine atmosphere, September is an enchanting time to experience Semmering's unique charm.

September Temperature in Semmering

In Semmering, Austria, September ushers in a transition from summer warmth to the cool embrace of autumn. With minimum temperatures dropping to -2°C (29°F) and an average of 13°C (55°F), the days are still delightfully mild, peaking at a pleasant 26°C (79°F). This month marks a notable shift, as evenings become crisper, foreshadowing the chill of the upcoming colder months. Nature begins to paint the landscape with rich autumn hues, making September an ideal time for visitors to enjoy both the mild weather and the stunning scenery, before winter blankets the region in snow.

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

The chart illustrates September temperature patterns in Semmering, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec283236455262636355473831
Data source: Temperature data for Semmering 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 Semmering

September in Semmering, Austria, continues the late-summer trend of substantial precipitation, with 118 mm (4.6 in) recorded over 14 days. This month sees a slight decrease from August's peak rainfall of 162 mm (6.4 in), yet it remains higher than the spring months, indicating that the region is transitioning towards autumn. The frequency and amount of rainfall suggest a sustained, though slightly diminishing, moisture pattern as the year progresses. This trend sets the stage for the wetter and chillier months ahead, with autumn's crisp air bringing both beauty and changes to the landscape, nurturing the lush greenery before winter sets in.

September Precipitation Trends in Semmering

The chart displays monthly precipitation patterns in Semmering, 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.
JanFebMarAprMayJunJulAugSepOctNovDec59506072143124147162118756379
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Semmering

In September, Semmering, Austria, experiences a gentle transition in humidity, with levels averaging around 65%. This marks a shift from the summer months, where humidity peaked at 60% in August, signaling a gradual increase as autumn approaches. The patterns showcase a downward trend from the winter's highest humidity in January at 90%, gradually descending towards the summer, before beginning to rise again in the fall. As the year unfolds, September stands out as a month where the air begins to feel a bit crisper yet retains subtle moisture, setting the stage for the richer, more humid months of October and November ahead. Overall, the interplay between humidity levels reflects the seasonal changes in this picturesque region.

September Average Humidity in Semmering

This chart illustrates the average monthly humidity levels in Semmering, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec90%84%78%73%71%73%70%60%65%84%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Semmering

As September rolls into Semmering, Austria, the UV Index begins to reflect a transition from the intense summer months. With a UV Index of 6, categorized as high, the sun's rays still bear enough strength to warrant caution, necessitating a burn time of approximately 25 minutes for unprotected skin. This indicates a notable decline from the peak summer values of 9, yet it remains significantly higher than the winter months. As the days shorten and temperatures cool, September serves as a reminder to stay sun-smart while enjoying the emerging autumn scenery. For more detailed insights, check out Semmering UV Index.

Maximum UV Index Levels in Semmering for September

The chart shows the monthly maximum UV Index (UVI) for Semmering 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.
JanFebMarAprMayJunJulAugSepOctNovDec235689986432
Data source: Semmering 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 Semmering

As summer bids farewell, September in Semmering, Austria still embraces the warmth of sunshine, with an impressive 310 hours of sunlight illuminating the stunning landscapes. This month gracefully transitions from the peak summer luminosity of July, which boasts 411 hours, revealing a slight yet delightful drop as autumn approaches. The steady decrease in sunlight hours from the vibrant June to the mystical November hints at the changing seasons, yet September maintains a generous brightness compared to its winter counterparts. With September's hours outshining the earlier months like January and February, it's a perfect time for outdoor adventures amidst the breathtaking alpine scenery, reminding us that even as the days grow shorter, the beauty of Semmering shines on.

Monthly Sunshine Duration in Semmering: September Highlighted

The September sunshine duration represents the total number of hours Semmering 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.
JanFebMarAprMayJunJulAugSepOctNovDec160h227h300h342h350h395h411h373h310h277h211h178h
Data source: Semmering September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Semmering During September

In Semmering, Austria, September enjoys a notable 44% chance of sunny weather, a promising figure that aligns with the overall trend of increased sunshine during late summer. As the seasons transition, this month's sun exposure is comparable to March and June, demonstrating that September is a sweet spot between the summer heat and the onset of autumn. Notably, while the chance of sun dips slightly from the heights of July and August, it remains significantly higher than the early spring months and the colder days ahead in autumn. This trend suggests that visitors can still bask in pleasant weather, making September an ideal time for outdoor activities amidst the stunning alpine scenery.

Percentage of Sunny Days in September in Semmering

The chart illustrates the percentage of sunny days in Semmering 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 Semmering experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec20%39%44%33%29%46%38%34%44%39%32%20%
Data source: Semmering September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Semmering in September

As summer fades to autumn in Semmering, Austria, September offers a gentle transition with approximately 12 hours of daylight. This is a noticeable shift from the extended daylight hours of June through August, where the sun generously graced the region with up to 15 hours each day. Following the peak of summer, September's light heralds the arrival of cooler temperatures and shorter days, yet still provides a substantial amount of sunshine. In comparison to the earlier months of the year, like January with just 8 hours, September maintains a balance by bringing a sense of warmth and brightness before the daylight gradually diminishes further into October and November. The fading daylight serves as a reminder of the changing seasons, inviting residents and visitors to cherish the lingering evenings during this picturesque time of year.

Average Daylight Hours in Semmering for September

The chart illustrates the variation in daylight duration in Semmering throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 54m10h 14m11h 55m13h 39m15h 8m15h 54m15h 30m14h 10m12h 31m10h 48m9h 16m8h 28m
Data source: Semmering daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Semmering

In September, the winds in Semmering, Austria, tend to calm down slightly, with an average wind speed of 2.2 m/s (5 mph). This marks a gentle decline from the breezier months of April and May, both averaging 3.1 m/s (7 mph). As summer fades, there’s a noticeable trend towards lighter breezes, reflecting the transition into autumn. Interestingly, while September’s winds are among the lightest of the year, they still retain a pleasant freshness as the foliage begins to change, offering a serene atmosphere for those exploring the picturesque landscapes. Overall, the month ushers in a quieter period of wind, hinting at the cozy charm that characterizes the fall season in this enchanting alpine region.

Average September Wind Speed in Semmering

The chart displays monthly wind speed patterns in Semmering, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.62.42.73.13.12.32.42.32.2 m/s2.62.42.8
Data source: Semmering September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Semmering Compares to Other Months

The weather in Semmering 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 Semmering and find detailed weather information for every month.

September and January present starkly contrasting weather patterns. In September, temperatures range from a chilly minimum of -2°C (29°F) to a pleasant maximum of 26°C (79°F), with an average of 13°C (55°F). The month experiences moderate precipitation, totaling 118 mm (4.6 in) over about 14 days, with humidity levels at 65%. In sharp contrast, January is much colder, with temperatures dropping to a minimum of -17°C (2°F) and an average of -2°C (29°F), peaking at just 12°C (54°F). Precipitation in January is lower at 59 mm (2.3 in) across 12 days, but humidity is higher at 90%. For more details on January's weather, you can refer to Semmering weather in January.

September and February present stark contrasts in weather conditions. In September, temperatures range from a minimum of -2°C (29°F) to a pleasant maximum of 26°C (79°F), with an average of 13°C (55°F). This month experiences significant precipitation, totaling 118 mm (4.6 in) over 14 days, and maintains a humidity level of 65%. In contrast, February is much colder, with temperatures dipping as low as -19°C (-2°F) and peaking at 16°C (61°F), averaging around 0°C (33°F). This month sees less rainfall, with 50 mm (2.0 in) over 11 days, but an increased humidity of 84%. For more details on February conditions, you can refer to Semmering weather in February.

In comparing the weather of September and March, notable differences emerge in both temperature and precipitation. September boasts milder temperatures, with averages around 13°C (55°F) and highs reaching up to 26°C (79°F), while March experiences significantly colder conditions, featuring an average of 2°C (37°F) and maximums of only 18°C (65°F). Additionally, September sees almost double the precipitation at 118 mm (4.6 in) compared to March's 60 mm (2.4 in), creating a wetter atmosphere during the late summer month. Humidity levels are also higher in March at 78%, compared to September's 65%. For a detailed look at what to expect during this time, check out Semmering weather in March.

In comparing the weather of September and April, it’s evident that September enjoys milder temperatures, with an average of 13°C (55°F), contrasted with April's cooler average of 7°C (45°F). While September can reach a maximum of 26°C (79°F), April's highs peak at a more moderate 24°C (76°F). Precipitation is more abundant in September, with 118 mm over 14 days, compared to April’s 72 mm over 12 days. Additionally, April experiences slightly higher humidity levels at 73% versus September’s 65%. For more detailed insights, you can explore Semmering weather in April.

In comparing the weather between September and May, both months showcase a similar range of temperatures, with minimums dipping to -2°C (29°F) and maximums reaching 26°C (79°F). However, September tends to be warmer on average at 13°C (55°F) compared to May's average of 11°C (52°F). Precipitation is more prominent in May, with 143 mm (5.6 in) over 22 days, compared to September's 118 mm (4.6 in) over 14 days. Additionally, May carries a higher humidity level at 71% versus September's 65%. For more detailed insights, check out Semmering weather in May.

When comparing the weather in September and June, several differences emerge. September typically sees a wider range of temperatures, with minimums dipping as low as -2°C (29°F) and maximums reaching up to 26°C (79°F), while June maintains milder conditions with minimums around 4°C (39°F) and maximums peaking at 30°C (87°F). Precipitation levels are slightly higher in June, with 124 mm (4.9 in) over 18 days, compared to September’s 118 mm (4.6 in) over 14 days. Additionally, June experiences higher humidity at 73% compared to September's 65%. For more detailed insights into June weather conditions, you can refer to Semmering weather in June.

The weather in September is noticeably cooler compared to July, with average temperatures ranging from a minimum of -2°C (29°F) to a maximum of 26°C (79°F), while July enjoys milder conditions, with temperatures from a minimum of 6°C (43°F) to a peak of 30°C (87°F). Precipitation is also more frequent in July, occurring on 20 days with a total of 147 mm (5.8 in), compared to 14 days of rain in September accumulating 118 mm (4.6 in). Additionally, September has a lower humidity level of 65%, compared to July's higher humidity of 70%. For more details on July weather, you can check Semmering weather in July.

In comparing the weather of September to that of August, September experiences cooler temperatures overall, with a minimum of -2°C (29°F) and an average of 13°C (55°F), compared to August's minimum of 5°C (42°F) and average of 17°C (63°F). Additionally, September has a maximum temperature of 26°C (79°F), which is noticeably lower than August's peak of 31°C (88°F). Precipitation is also a factor, with September receiving 118 mm (4.6 inches) over 14 days, whereas August has higher precipitation at 162 mm (6.4 inches) across 19 days. Humidity levels are slightly higher in September at 65% compared to 60% in August. For more detailed insights on the weather in August, you can refer to Semmering weather in August.

In September, the weather showcases a wider temperature range, with minimums dipping to -2°C (29°F) and maximums reaching up to 26°C (79°F). The average temperature hovers around a mild 13°C (55°F), accompanied by a relatively high precipitation of 118 mm (4.6 in) over 14 days, contributing to a humidity level of 65%.

Conversely, October presents a cooler climate, with minimum temperatures slightly higher at -1°C (31°F) and a decrease in the average to 8°C (48°F). The maximum temperature also drops to 21°C (71°F). The month sees reduced precipitation at 75 mm (3.0 in) across 12 days, but the humidity rises significantly to 84%. For more detailed insights, check out Semmering weather in October.

In September, the weather is generally milder with temperatures ranging from a low of -2°C (29°F) to a pleasant high of 26°C (79°F), averaging around 13°C (55°F). The month experiences considerable rainfall, averaging 118 mm (4.6 in) over 14 days, and has a relative humidity of 65%. In contrast, November brings a notable drop in temperatures, with lows falling to -12°C (10°F) and a high of 18°C (64°F), averaging just 4°C (39°F). Precipitation decreases to 62 mm (2.5 in) over 11 days, but the humidity rises significantly to 89%. For those interested in more specifics about the conditions in November, you can check Semmering weather in November.

When comparing the weather in September and December, notable differences emerge. September experiences a milder range of temperatures, with average highs reaching 26°C (79°F) and lows around -2°C (29°F), offering a more comfortable climate for outdoor activities. In contrast, December's temperatures drop significantly, averaging around 0°C (31°F) and peaking at just 12°C (54°F), with minimums plummeting to -14°C (7°F). Precipitation is more frequent in December, occurring over 16 days, albeit with a total of 79 mm (3.1 in), which is less than September's 118 mm (4.6 in) over 14 days. Additionally, December's humidity is notably higher at 89%, compared to September’s 65%, contributing to a colder, more damp atmosphere. For more details on December conditions, check out Semmering weather in December.

Compare Semmering's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Semmering

As September arrives in Semmering, it marks a transition into autumn, characterized by cooler temperatures and increased rainfall compared to the summer months. With a mix of sunny days and frequent showers, the month brings an average temperature that invites both outdoor enthusiasts and nature lovers to enjoy the changing scenery. However, with about 14 days of precipitation, it’s wise to prepare for wet weather. Humidity levels tend to remain moderate at 65%, creating a refreshing atmosphere as the foliage begins to transform. Overall, September presents a unique blend of warmth and coolness, making it a delightful time to visit. For a deeper understanding of what to expect throughout the year, check out Semmering Climate.