Last updated: March 17, 2025
September in Banff, United Kingdom, offers a mild yet variable climate, with temperatures ranging from a maximum of 19°C (66°F) to a minimum of 9°C (49°F), resulting in an average temperature of 13°C (56°F). During this month, expect frequent rainfall, as 109 mm (4.3 in) of precipitation falls over 16 days, contributing to the landscape's lush greenery. The high humidity level, around 90%, can make the air feel crisp and invigorating, perfect for those who appreciate a touch of freshness while exploring the stunning surroundings.
In September, Banff enjoys a delightful transition as it bids farewell to summer and welcomes the crispness of autumn. With minimum temperatures hovering around 9°C (49°F), the days are pleasantly warm, peaking at a moderate 19°C (66°F). The average temperature settles at 13°C (56°F), striking a comfortable balance for outdoor enthusiasts. Compared to the warmer months of July and August, September's mild weather encourages visitors to explore the stunning landscapes without the summer crowds. This month serves as a gentle reminder of the seasonal shift, offering cooler mornings and vibrant autumn foliage, making it an inviting time to experience all that this beautiful region has to offer.
September marks a notable shift in precipitation patterns in Banff, United Kingdom, with an increase to 109 mm (4.3 in) of rainfall, the highest for the month and a significant jump from the summer months. This surge is accompanied by 16 days of rain, reflecting a transition towards the wetter autumn season. As the year progresses into October and November, precipitation further escalates, often peaking around 140 mm (5.5 in) in October, suggesting that the end of the year consistently brings more rainy days. This trend underscores a pattern where late summer gives way to a burgeoning autumn, establishing September as the beginning of a more rain-laden chapter in Banff's climate narrative.
In September, Banff experiences a noticeable uptick in humidity, reaching 90%—the highest level for the month and reflecting a trend that sees the onset of autumn bringing a marked increase in moisture. This rise follows the consistent humidity levels observed over the summer, where the average lingered around 86% in both July and August. As the year progresses, September acts as a bridge to the even more humid months ahead, with October and November hitting 91% and 92%, respectively. Despite a slight dip in humidity during the spring months, the overall trend indicates that Banff remains a lush and humid locale, especially as it transitions into the fall season.
As summer gives way to autumn, September in Banff sees a noticeable shift in the UV Index, which settles at 5—a level categorized as moderate. This marks a slight decline from the peak of 7 during the height of summer, yet still requires attentive sun protection, with a burn time of 30 minutes if you're unprotected. The trend indicates that while days are getting shorter and temperatures cooler, UV radiation remains significant enough to warrant caution. As the seasons transition, it's wise to stay vigilant and protect your skin while enjoying the stunning landscapes of Banff. For more insights, check out the detailed UV index for the area: Banff UV Index.
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As summer gracefully transitions into autumn, September in Banff, United Kingdom, offers a delightful blend of warmth and changing colors, with an impressive 311 hours of sunshine illuminating the landscape. This month marks a notable decline from the peak of 427 hours in July but still maintains a substantial glow compared to the chillier months ahead. The gradual reduction in sunlight from August’s 390 hours highlights a shift towards the shorter days of fall, yet September's sunshine creates the perfect backdrop for outdoor adventures and breathtaking scenery. Visitors can revel in the crisp air and vibrant foliage, making it an ideal time to explore before the winter sets in, as days of sunlight dwindle to a modest 228 hours by October.
In September, the likelihood of sunny weather in Banff stands at 27%, marking a slight dip compared to the summer months. As the year progresses into early autumn, there's a noticeable trend of decreasing sunshine, with July boasting the highest chance at 25%. Notably, the summer peak in August, with only 19% of sunny days, signals the transition toward crisper fall weather. This gradual decline invites locals and tourists alike to enjoy the beauty of Banff before winter descends, where the charm of early autumn foliage complements the scenic landscape, despite the reduced chances of sunshine.
As summer fades, September in Banff marks a gentle transition in daylight duration, offering around 12 hours of sunlight. This shift reflects a steady decline from the sun-drenched days of July and August, which bask in 17 and 15 hours of daylight, respectively. The month serves as a bridge, where the fading light begins to hint at the approaching autumn. Following September, the daylight gradually diminishes further, with October seeing only 10 hours before descending into the shorter days of winter. This rhythmic interplay of light not only influences the natural scenery but also invites residents and visitors to savor the changing seasons and their unique beauty in Banff.
In September, Banff experiences a gentle breeze with an average wind speed of 5.5 m/s (12 mph). This marks a continued decline from the peak summer months of July and August, where winds were notably calmer. As the season transitions into autumn, the wind begins to pick up again in October, reaching 7.7 m/s (17 mph), suggesting an invigorating shift in the weather. Overall, September embodies a peaceful calm, serving as a soft prelude to the brisk winds of the upcoming fall months, inviting nature lovers to enjoy the stunning landscapes before winter descends.
The weather in Banff 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 Banff and find detailed weather information for every month.
September and January present distinct contrasts in weather patterns. In September, temperatures range from a mild minimum of 9°C (49°F) to a comfortable maximum of 19°C (66°F), with an average of 13°C (56°F). The month experiences significant rainfall, totaling 109 mm (4.3 in) over approximately 16 days, accompanied by high humidity at 90%. In comparison, January is notably colder, with temperatures dipping to a minimum of 2°C (35°F) and peaking at a maximum of 13°C (55°F), resulting in an average temperature of 6°C (43°F). Though January sees less precipitation at 77 mm (3.0 in) across 15 days, the humidity remains relatively high at 89%. For more detailed information, you can explore Banff weather in January.
September and February present distinct weather contrasts. In September, temperatures range from a minimum of 9°C (49°F) to a pleasant maximum of 19°C (66°F), with an average of 13°C (56°F). This month also experiences considerable precipitation, totaling 109 mm (4.3 in) over 16 days, and high humidity at 90%. In contrast, February is considerably cooler, with temperatures dipping to a minimum of 0°C (32°F) and only reaching a maximum of 11°C (52°F), averaging around 5°C (42°F). Although it has less precipitation at 59 mm (2.3 in) over 14 days, humidity remains relatively high at 88%. For more details about February weather, check out Banff weather in February.
September and March showcase contrasting weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 19°C (66°F), with an average of 13°C (56°F), creating a mild atmosphere. Combined with high humidity at 90% and significant precipitation of 109 mm (4.3 in) over 16 days, September often feels damp and cool. In contrast, March tends to be much colder, with temperatures fluctuating from a minimum of -1°C (30°F) to a maximum of 12°C (53°F), and an average of only 6°C (43°F). Although precipitation is lower at 71 mm (2.8 in) over the same 16 days, the humidity remains relatively high at 86%. The stark difference in temperatures and overall feel between these months highlights the transitional nature of early spring compared to the late summer. For more details, you can check out Banff weather in March.
When comparing the weather in September and April, notable differences can be observed. September tends to be milder, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 19°C (66°F), while April is cooler, with temperatures ranging from 0°C (33°F) to 14°C (58°F). Additionally, September experiences more rainfall, with 109 mm (4.3 in) across 16 days, compared to April's 50 mm (2.0 in) over 11 days. Humidity levels are also slightly higher in September at 90%, compared to 84% in April. For a closer look at what to expect, visit Banff weather in April.
In comparison to May, September generally experiences milder temperatures, with average highs of 19°C (66°F) compared to May's maximum of 17°C (63°F). While both months can be characterized by their dampness, September sees significantly more precipitation, totaling 109 mm (4.3 in) over 16 days, compared to May's 63 mm (2.5 in) over 13 days. Additionally, humidity is higher in September at 90%, contrasted with May’s 82%. For those interested in more specifics about May weather, you can view details on Banff weather in May.
When comparing the weather in September and June, both months feature similar maximum temperatures of 19°C (66°F), but September generally enjoys slightly higher average and minimum temperatures, with averages at 13°C (56°F) and a minimum of 9°C (49°F) compared to June’s 12°C (54°F) and 7°C (46°F). September also tends to be wetter, receiving 109 mm (4.3 in) of precipitation over 16 days, whereas June sees less rain, totaling 77 mm (3.0 in) across 11 days. Additionally, the humidity in September is higher at 90%, compared to June's 84%, making September feel a bit more humid and damp. For more detailed insights, you can check out Banff weather in June.
In comparing the weather of September and July, we observe a slight variance in temperatures and precipitation. September experiences cooler averages, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 19°C (66°F), while July is a bit warmer, with temperatures between 10°C (50°F) and 21°C (70°F). Additionally, September sees more precipitation, accumulating 109 mm (4.3 in) over 16 days, in contrast to July's 78 mm (3.1 in) over 14 days. Humidity levels are also higher in September at 90%, compared to 86% in July, contributing to a more humid feeling as summer transitions into fall. For further details on July weather, you can check Banff weather in July.
In comparing the weather between August and September, September tends to be slightly cooler, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 19°C (66°F), compared to August's range of 11°C (52°F) to 19°C (67°F). Additionally, September experiences higher precipitation levels, accumulating 109 mm (4.3 in) over 16 days, whereas August sees 79 mm (3.1 in) over 15 days. Humidity also increases in September, reaching 90% compared to August's 86%. Overall, September marks a transition to cooler and wetter conditions. For more detailed information, check Banff weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 19°C (66°F), with an average of 13°C (56°F). The month sees 109 mm (4.3 in) of precipitation spread over 16 days, and humidity levels hover around 90%. In contrast, October experiences cooler temperatures, with minimums dropping to 5°C (41°F) and maximums capping at 16°C (62°F), resulting in an average temperature of 11°C (52°F). Additionally, October is wetter, receiving 140 mm (5.5 in) of rain over 22 days, accompanied by a slight increase in humidity to 91%. For more detailed information, you can check Banff weather in October.
September and November exhibit distinct differences in weather patterns. In September, temperatures begin to cool, ranging from a minimum of 9°C (49°F) to a maximum of 19°C (66°F), with an average temperature of 13°C (56°F). Rain is common, with 109 mm (4.3 in) of precipitation over 16 days and high humidity levels at 90%. In contrast, November sees a further drop in temperatures, with minimums of 2°C (36°F) and maximums of 14°C (57°F), averaging at 9°C (48°F). Precipitation increases to 143 mm (5.6 in) over 21 days, accompanied by slightly higher humidity at 92%. For a deeper look into November conditions, you can check Banff weather in November.
September and December present quite a contrast in weather conditions. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 19°C (66°F), with an average of 13°C (56°F), accompanied by significant rainfall of 109 mm (4.3 in) over 16 days. The humidity is notably high at 90%, contributing to a damp feel in the air.
In contrast, December ushers in colder temperatures, with a minimum of 2°C (36°F) and a maximum of 12°C (53°F), resulting in an average of 7°C (44°F). Precipitation is slightly higher at 114 mm (4.5 in), spread over the same 16 days but with a humidity level that drops to 88%. For more detailed insights into what to expect, check out Banff weather in December.
As summer slips away, September in Banff ushers in a refreshing transition characterized by cooler temperatures and increased humidity. This month stands apart, bringing a unique charm to the landscape with the gradual shift from warm sunny days to crisp, cool evenings. While precipitation becomes more frequent—with nearly half the month experiencing rain—this only enhances the vibrant colors of the fall foliage. For those looking to embrace the serene beauty of Banff during this transformative season, the weather offers a distinct backdrop unlike any other month of the year. To discover more about the diverse climate of Banff, visit Banff Climate.