September Weather in Fort Augustus, United Kingdom

Last updated: March 17, 2025

In September, Fort Augustus, United Kingdom, experiences a diverse range of weather, with temperatures fluctuating between a maximum of 22°C (72°F) and a minimum of -1°C (31°F), leading to an average temperature of 11°C (52°F). The month is characterized by high humidity levels around 90%, contributing to a damp atmosphere. Rainfall is prevalent, with 125 mm (4.9 in) of precipitation recorded over 18 rainy days, making it a month of variable weather. Visitors can expect to encounter the beauty of autumn as the landscape changes, but should be prepared for the occasional downpour amidst cooler temperatures.

September Temperature in Fort Augustus

In September, Fort Augustus welcomes the transition into autumn with a notable drop in temperatures compared to the summer months. The minimum temperature hovers around -1°C (31°F), while the average rises to a mild 11°C (52°F) and peaks at a pleasant 22°C (72°F) during the day. This month signifies a shift as it straddles the lingering warmth of late summer and the crispness of fall, often treating residents and visitors to a vivid display of autumn colors. As the days shorten and the air cools, the region's natural beauty is accentuated, making September an ideal time for outdoor exploration amidst breathtaking landscapes.

September Weather in Fort Augustus: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fort Augustus, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec363739424853565551464137
Data source: Temperature data for Fort Augustus 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 Fort Augustus

In September, Fort Augustus experiences a notable spike in precipitation, with 125 mm (4.9 in) of rain recorded over 18 days. This marks a slight increase from the previous month, August, which averaged 113 mm (4.5 in) across 21 days. As summer transitions into autumn, the rainfall pattern becomes more pronounced, hinting at the wetter months ahead; both October and November follow with even greater precipitation averages. The increased moisture in September not only contributes to the lushness of the scenic landscapes but also signals the onset of a more dynamic weather pattern typical of the Scottish Highlands. The change is palpable, as the days grow cooler and the weather increasingly resembles the brisk, rainy conditions leading into winter.

September Precipitation Trends in Fort Augustus

The chart displays monthly precipitation patterns in Fort Augustus, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1161411336587106100113125156120128
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fort Augustus

September in Fort Augustus experiences a notable rise in humidity, peaking at 90%. This increase marks a transition as the summer months, which hover around 86%, give way to the even more humid conditions of autumn. As the year progresses, humidity steadily rises from the drier days of spring, where levels dip to around 82% in May, to the higher figures seen with the onset of fall, reaching 91% by October. This pattern showcases Fort Augustus's characteristic damp climate, where the lingering warmth of late summer blends seamlessly with the sweeping changes of early autumn, leading to a rich, moist atmosphere that defines the region.

September Average Humidity in Fort Augustus

This chart illustrates the average monthly humidity levels in Fort Augustus, 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.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%82%84%86%86%90%91%92%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fort Augustus

As summer transitions into autumn, September in Fort Augustus sees the UV Index dip to 5, categorizing exposure as moderate. This marks a gradual decline from the earlier months, with August peaking at a high UV Index of 6. The burn time remains consistent at 30 minutes, offering a more forgiving sun that still warrants some caution. Compared to the intense sun of June with its staggering UV Index of 8, September provides a more manageable environment for outdoor activities. As the days grow shorter and the weather cools, it's essential to stay aware of UV levels while enjoying the lingering sunshine. For detailed information on UV exposure, visit Fort Augustus UV Index.

Maximum UV Index Levels in Fort Augustus for September

The chart shows the monthly maximum UV Index (UVI) for Fort Augustus 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.
JanFebMarAprMayJunJulAugSepOctNovDec123568765311
Data source: Fort Augustus 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 Fort Augustus

As summer gracefully transitions into autumn, September in Fort Augustus provides a delightful balance of sunshine, boasting 268 hours of radiant light. Following the high of 375 hours in July, it's evident that the days are beginning to shorten, yet the month retains a warm glow, offering ample opportunities for outdoor adventures. This gradual decline is part of a broader trend, as the region enjoys its peak sunlight in the summer months before slipping into the more subdued grayness of winter. With September still basking in over a quarter of the yearly sunshine, it serves as a captivating reminder of the fading summer warmth while hinting at the cozy ambiance of the upcoming season.

Monthly Sunshine Duration in Fort Augustus: September Highlighted

The September sunshine duration represents the total number of hours Fort Augustus 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.
JanFebMarAprMayJunJulAugSepOctNovDec62h131h186h319h372h375h375h346h268h195h111h66h
Data source: Fort Augustus September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Fort Augustus During September

In Fort Augustus, the likelihood of sunny weather in September mirrors a somewhat gloomy trend, with a mere 13% chance of sunshine. This places September on the lower end of the spectrum for clear skies, particularly when compared to the more optimistic figures of April at 35%. The months leading into autumn exhibit a gradual decline in sunny days, with the summer months of June, July, and August hovering around 19%, making September feel particularly lackluster. As autumn approaches, residents and visitors alike can expect more overcast days, with sunshine becoming increasingly rare.

Percentage of Sunny Days in September in Fort Augustus

The chart illustrates the percentage of sunny days in Fort Augustus 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 Fort Augustus experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec14%17%12%35%18%19%19%15%13%10%13%11%
Data source: Fort Augustus September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Fort Augustus in September

As September unfolds in Fort Augustus, the days begin to shorten, offering around 12 hours of daylight. This marks a gentle transition from the lengthy, sun-drenched days of summer, where June and July bask in 17 hours of daylight, to a more autumnal feel as the daylight continues to dwindle toward the winter months. With daylight lasting 15 hours in August, September signals a noticeable decline, paving the way for October's 10 hours. This gradual reduction provides a soft reminder of the changing seasons, where the vibrant hues of autumn start to emerge before the long winter nights take hold.

Average Daylight Hours in Fort Augustus for September

The chart illustrates the variation in daylight duration in Fort Augustus throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 27m9h 28m11h 53m14h 20m16h 34m17h 47m17h 7m15h 5m12h 42m10h 16m8h 1m6h 46m
Data source: Fort Augustus daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Fort Augustus

As September unfolds in Fort Augustus, the average wind speed reaches 3.0 m/s (7 mph), gently nudging the summer's stillness towards the invigorating embrace of autumn. This slight increase from August's 2.3 m/s (5 mph) reflects a gradual rise in wind activity as the seasons shift, hinting at the forthcoming winter months. Interestingly, September's winds remain calmer than the early winter's 4.0 m/s (9 mph) in November, setting a serene backdrop for the stunning transitioning landscapes. The month captures a moment where the breeze whispers through the vibrant foliage, inviting both residents and visitors to revel in the beauty of changing seasons while providing a gentle prelude to the brisk winds that lie ahead.

Average September Wind Speed in Fort Augustus

The chart displays monthly wind speed patterns in Fort Augustus, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.74.53.82.82.73.32.02.33.0 m/s3.64.03.0
Data source: Fort Augustus September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Fort Augustus Compares to Other Months

The weather in Fort Augustus 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 Fort Augustus and find detailed weather information for every month.

In September, the weather is generally milder with average temperatures ranging from a low of -1°C (31°F) to a high of 22°C (72°F), while January experiences much colder conditions, with temperatures between -8°C (18°F) and 11°C (53°F). Although both months receive similar levels of precipitation, with September at 125 mm (4.9 in) over 18 days and January at 116 mm (4.6 in) over 15 days, September tends to feel more humid at 90%, compared to January's 89%. For those looking to explore the chill of January, more information can be found here: Fort Augustus weather in January.

September and February exhibit markedly different weather characteristics. In September, temperatures range from a chilly minimum of -1°C (31°F) to a comfortable maximum of 22°C (72°F), creating an average of 11°C (52°F). The month is relatively moist, with 125 mm (4.9 in) of precipitation spread over 18 days and a high humidity level of 90%. In contrast, February is much colder, with temperatures dipping as low as -11°C (12°F) and peaking at just 12°C (54°F), leading to a much lower average of 3°C (37°F). February sees slightly more precipitation at 140 mm (5.5 in) over 17 days, with humidity at 88%. For more detailed information on February weather, you can check Fort Augustus weather in February.

In September, the weather in Fort Augustus features milder temperatures, with an average of 11°C (52°F) and a maximum of 22°C (72°F), while March is cooler, with an average of 4°C (39°F) and a maximum of only 15°C (60°F). Both months experience significant rainfall, with September recording 125 mm (4.9 in) across 18 days and March slightly higher at 133 mm (5.2 in) over 19 days. Despite the similar levels of precipitation, September has a marginally higher humidity level of 90% compared to March's 86%. For more detailed weather information, visit Fort Augustus weather in March.

When comparing the weather in September and April, September generally offers milder temperatures, ranging from a minimum of -1°C (31°F) to a maximum of 22°C (72°F), with an average of 11°C (52°F). In contrast, April experiences cooler temperatures, with a minimum of -5°C (24°F) and a maximum of 20°C (68°F), averaging 6°C (43°F). Additionally, September tends to be wetter, receiving 125 mm (4.9 in) of rainfall over approximately 18 days, compared to April's 65 mm (2.6 in) over 15 days. Humidity levels are higher in September at 90%, while April's humidity sits at 84%. For more specific insights into April's weather, you can check the details here: Fort Augustus weather in April.

September and May exhibit distinct weather characteristics, with September tending to be warmer on average. In September, temperatures range from a minimum of -1°C (31°F) to a maximum of 22°C (72°F), while May experiences slightly cooler conditions, with temperatures ranging from -3°C (27°F) to a maximum of 23°C (74°F). September also sees more precipitation, totaling 125 mm (4.9 in) over 18 days, compared to May's 87 mm (3.4 in) across 17 days. Additionally, September has higher humidity at 90%, while May's humidity levels are relatively lower at 82%. For a more detailed look, you can refer to Fort Augustus weather in May.

September and June present contrasting weather patterns. In September, temperatures range from a chilly -1°C (31°F) to a pleasant 22°C (72°F), with an average of 11°C (52°F). The month is characterized by high humidity at 90% and considerable precipitation, totaling 125 mm (4.9 in) over 18 days. In contrast, June tends to be milder, with temperatures ranging from 1°C (34°F) to a warmer 26°C (79°F), and an average of 12°C (53°F). June also experiences less rainfall, with 106 mm (4.2 in) falling over just 17 days and a lower humidity level of 84%. For more detailed insights, you can visit Fort Augustus weather in June.

When comparing the weather in September and July, September typically experiences cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 22°C (72°F), leading to an average of 11°C (52°F). In contrast, July features milder conditions, with a minimum of 5°C (41°F), an average of 13°C (56°F), and a maximum of 25°C (78°F). Additionally, September sees more precipitation, totaling 125 mm (4.9 in) over 18 days, while July has slightly less at 100 mm (3.9 in) over the same number of days. Humidity levels are also higher in September at 90%, compared to 86% in July. For more details on July's weather specifics, check out this link: Fort Augustus weather in July.

In comparing the weather between September and August, we see notable differences in temperature and precipitation. September experiences colder temperatures, with a daily average of 11°C (52°F) and nighttime lows dropping to -1°C (31°F), while August remains milder, averaging 13°C (55°F) and a minimum of 4°C (40°F). Precipitation levels are slightly higher in September, totaling 125 mm (4.9 in) over 18 days, compared to August's 113 mm (4.5 in) over 21 days. Additionally, September has higher humidity at 90%, contrasted with August's 86%. For more detailed information on August weather, check Fort Augustus weather in August.

In September, temperatures in Fort Augustus range from a low of -1°C (31°F) to a pleasant high of 22°C (72°F), with an average temperature of 11°C (52°F). The month sees considerable rainfall, with 125 mm (4.9 in) recorded over 18 days, and humidity levels are quite high at 90%.

As October arrives, temperatures dip further, with a minimum of -3°C (27°F) and a maximum of 16°C (62°F), leading to an overall average of 8°C (46°F). Rainfall increases to 156 mm (6.1 in), occurring over 23 days, and the humidity slightly rises to 91%. For a detailed look at October weather in this region, visit Fort Augustus weather in October.

September and November present notable differences in weather patterns. In September, temperatures range from a minimum of -1°C (31°F) to a maximum of 22°C (72°F), with an average of 11°C (52°F). The month experiences 125 mm (4.9 in) of precipitation over 18 days, accompanied by high humidity at 90%. In contrast, November sees cooler temperatures, with a minimum of -5°C (23°F) and a maximum of 13°C (55°F), averaging just 5°C (41°F). The precipitation remains similar at 120 mm (4.7 in), but it occurs on 20 days, reflecting increased rainfall. Humidity also rises slightly to 92%. For more detailed information about weather in November, check out Fort Augustus weather in November.

In September, the weather features a more moderate temperature range, with lows of -1°C (31°F) and highs reaching 22°C (72°F). The average temperature sits at 11°C (52°F), and the month experiences significant precipitation, totaling 125 mm (4.9 in) over 18 days, with a high humidity level of 90%.

In contrast, December brings colder temperatures, with minimums plummeting to -8°C (17°F) and a maximum of only 11°C (52°F). The average temperature decreases to 3°C (38°F), and precipitation remains comparable at 128 mm (5.0 in) over 19 days. Humidity during December is slightly lower at 88%.

For more detailed information about the weather specifics in December, you can visit Fort Augustus weather in December.

Compare Fort Augustus's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Fort Augustus

As September settles in at Fort Augustus, it brings a delightful transition from the warmth of summer to the cool embrace of autumn. The average temperatures dip significantly, offering a refreshing contrast to the balmy days of July and August, while the brisk air is complemented by a notable increase in humidity. This month tends to be quite wet, with frequent rainy days that serve to replenish the lush Scottish landscape, setting it apart from the drier summer months. The combination of cooler temperatures and higher precipitation makes September a unique time to experience the enchanting beauty of Fort Augustus. For more insights on the seasonal variations, explore the detailed information at Fort Augustus Climate.