September Weather in Portsoy, United Kingdom

Last updated: March 17, 2025

In September, the charming coastal town of Portsoy, United Kingdom, experiences a delightful blend of mild temperatures and refreshing breezes. With maximum temperatures reaching 19°C (66°F) and an average of 13°C (56°F), the month offers a pleasant retreat from summer's heat. However, the minimum temperature can dip to 9°C (48°F), reminding visitors of autumn's approach. Rain is a frequent visitor, with 111 mm (4.4 in) of precipitation recorded over approximately 17 days, creating a lush, verdant landscape. Coupled with a high humidity level of 90%, September in Portsoy is a moody yet picturesque experience, perfect for those who enjoy a dramatic coastal atmosphere.

September Temperature in Portsoy

In September, Portsoy, United Kingdom, experiences a gentle transition as temperatures begin to cool from the summer warmth. With minimums around 9°C (48°F) and averages hovering at 13°C (56°F), the month maintains a mild charm, inviting residents and visitors to savor the last whispers of summer. Max temperatures reach a pleasant 19°C (66°F), providing ample opportunity for outdoor activities amidst the stunning coastal scenery. As the month progresses, these temperatures signify a shift from the more balmy days of August, hinting at the crispness of autumn to come, while still offering the warmth ideal for late-season exploration.

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

The chart illustrates September temperature patterns in Portsoy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434243454954575855524744
Data source: Temperature data for Portsoy 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 Portsoy

September marks a significant shift in precipitation for Portsoy, United Kingdom, with an impressive 111 mm (4.4 in) of rain recorded over 17 days. This robust rainfall is notably higher than the preceding months, such as August’s 77 mm and July’s 79 mm, hinting at the end of the summer’s relative dryness. As autumn approaches, the uptick in both precipitation amount and precipitation days sets the stage for a wetter period ahead, culminating in October’s even more substantial average of 137 mm over 24 days. This trend underscores Portsoy’s transition into the cooler, rainier seasons, making September a key indicator of the weather patterns to come.

September Precipitation Trends in Portsoy

The chart displays monthly precipitation patterns in Portsoy, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7455674866807977111137133107
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Portsoy

September in Portsoy, United Kingdom, marks a notable shift in humidity levels, soaring to 90%. This increase is part of a broader seasonal trend where humidity peaks as summer transitions into autumn. Following the relatively stable figures of the warmer months, which hovered around 86% in both July and August, September's notable rise signifies the onset of autumnal moisture. In contrast to earlier months, such as May's drier 82%, the sustained increase continues into the fall, where October and November see humidity levels climb even higher, reaching 91% and 92% respectively. This pattern illustrates not only the region's consistently high humidity throughout the year but also emphasizes the dampness that characterizes the coastal climate as the seasons change.

September Average Humidity in Portsoy

This chart illustrates the average monthly humidity levels in Portsoy, 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 Portsoy

As September rolls in, Portsoy, United Kingdom, experiences a moderate UV Index of 5, which suggests an ideal balance for outdoor activities with 30 minutes of safe sun exposure. This month marks a slight dip from the high levels seen in the summer, notably from June's peak of 8, though it remains consistent with the levels in May and April. The trend towards lower UV radiation is a welcome relief after the intense sun of August, allowing residents and visitors alike to enjoy the outdoors more comfortably. As the seasons change, it's still wise to stay sunsmart and check the Portsoy UV Index for daily updates to ensure safe enjoyment of the beautiful autumn days ahead.

Maximum UV Index Levels in Portsoy for September

The chart shows the monthly maximum UV Index (UVI) for Portsoy 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.
JanFebMarAprMayJunJulAugSepOctNovDec123558765311
Data source: Portsoy 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 Portsoy

September in Portsoy, United Kingdom, shines with a generous 311 hours of sunshine, marking a dynamic transition from the vibrant summer months. As autumn approaches, this month reveals a notable decrease compared to the peak of July, which boasts the highest total at 424 hours. However, September still holds onto a significant amount of sunlight, showcasing the lingering warmth of summer. The gradual reduction in daylight is evident when compared to the dazzling May and June, which together bathe Portsoy in over 400 hours of sunshine. As the days shorten, the lingering rays of September provide a charming farewell to summer, setting the stage for the cozy, reflective months ahead.

Monthly Sunshine Duration in Portsoy: September Highlighted

The September sunshine duration represents the total number of hours Portsoy 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.
JanFebMarAprMayJunJulAugSepOctNovDec82h157h226h357h415h418h424h389h311h228h116h94h
Data source: Portsoy September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Portsoy During September

September in Portsoy, United Kingdom, typically offers a 27% chance of sunny weather, which slightly dips from the summer months. While the likelihood of sunny days in August is notably lower at 19%, September does not see a dramatic increase, maintaining a steady yet modest chance of sunshine. This pattern reflects a gradual retreat from the warmer summer conditions, with the overall trend indicating that the sun shines more frequently earlier in the year, peaking in April at 44%. As autumn approaches, residents and visitors can expect variability, with September often serving as a transitional month where both sunny spells and more overcast days coexist.

Percentage of Sunny Days in September in Portsoy

The chart illustrates the percentage of sunny days in Portsoy 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 Portsoy experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec29%41%29%44%33%30%26%20%27%21%24%26%
Data source: Portsoy September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Portsoy in September

As summer fades into autumn, September in Portsoy, United Kingdom, marks a gentle transition in daylight duration. With 12 hours of daylight, this month signifies a notable decrease from the sun-drenched summer days of July and August, which boasted nearly 17 hours of sunlight. The gradual decline is a precursor to the shorter days ahead, as the daylight diminishes to 10 hours in October and then further to a mere 6 hours by December. This pattern not only illustrates the shifting seasons but also sets the stage for the cozy, twilight evenings that characterize the latter part of the year, inviting residents and visitors alike to savor the rich hues of autumn.

Average Daylight Hours in Portsoy for September

The chart illustrates the variation in daylight duration in Portsoy throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 20m9h 25m11h 53m14h 24m16h 40m17h 56m17h 15m15h 10m12h 43m10h 13m7h 56m6h 38m
Data source: Portsoy daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Portsoy

In September, the winds in Portsoy settle into a steady rhythm, with an average speed of 5.4 m/s (12 mph) that mirrors the calm of late summer. This marks a transition from the more vigorous gusts of November (9.4 m/s or 21 mph) and February (9.0 m/s or 20 mph), where winds whip through the coastal town with a notable force. As we move through the year, it's clear that the spring and summer months bring gentler breezes, with July reaching its calmest point at just 4.7 m/s (11 mph). However, the autumn winds begin to revive as October approaches, hinting at the returning vigor of the season. Overall, September’s winds encapsulate a moment of tranquility before the more forceful gusts of fall sweep in, creating a beautiful balance in Portsoy's coastal atmosphere.

Average September Wind Speed in Portsoy

The chart displays monthly wind speed patterns in Portsoy, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7.89.07.06.75.85.54.75.45.4 m/s7.59.47.2
Data source: Portsoy September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Portsoy Compares to Other Months

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

September and January present contrasting weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 19°C (66°F), with an average of 13°C (56°F). The month experiences 111 mm (4.4 in) of precipitation over 17 days, accompanied by high humidity at 90%. In comparison, January sees cooler conditions, with temperatures dipping to a minimum of 2°C (35°F) and peaking at 13°C (55°F), averaging just 6°C (43°F). Although January has less rainfall, totaling 74 mm (2.9 in) over 14 days, the humidity remains slightly lower at 89%. For a more detailed overview of January weather patterns, you can visit Portsoy weather in January.

September and February exhibit notable differences in weather patterns. In September, the temperatures range from a minimum of 9°C (48°F) to a maximum of 19°C (66°F), with an average of 13°C (56°F). The month is characterized by higher precipitation, totaling 111 mm (4.4 in) over 17 days, and humidity levels around 90%. In contrast, February experiences cooler temperatures, with a minimum of 0°C (31°F) and a maximum of 11°C (52°F), leading to an average of just 6°C (42°F). Precipitation is also lower at 55 mm (2.2 in) over 14 days, while humidity remains slightly lower at 88%. For a closer look at February's weather specifics, check Portsoy weather in February.

September and March present contrasting weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 19°C (66°F), with an average of 13°C (56°F). The month is characterized by frequent rain, with 111 mm (4.4 in) of precipitation over 17 days, accompanied by high humidity at 90%. In contrast, March experiences cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 12°C (54°F), averaging around 6°C (43°F). Although it is less rainy than September, March still sees 67 mm (2.6 in) of precipitation over 15 days, with humidity slightly lower at 86%. For more detailed information, you can visit Portsoy weather in March.

When comparing the weather in September and April, several key differences emerge. September experiences milder temperatures, with averages around 13°C (56°F), and highs reaching up to 19°C (66°F). In contrast, April tends to be cooler, with an average of 7°C (45°F) and a maximum of just 14°C (57°F). Precipitation is also more pronounced in September, receiving 111 mm (4.4 in) over 17 days, compared to April's 48 mm (1.9 in) across 11 days. The humidity in September is slightly higher at 90%, while April's humidity stands at 84%. For a closer look at the specifics of April weather, you can visit Portsoy weather in April.

September offers a milder temperature range compared to May, with average highs reaching up to 19°C (66°F) and lows around 9°C (48°F). In contrast, May's temperatures are a bit cooler, with maximums of 17°C (63°F) and a minimum of 3°C (38°F). Additionally, September sees more precipitation, totaling 111 mm (4.4 in) over approximately 17 days, while May has a lighter rainfall of 65 mm (2.6 in) spread over 12 days. The humidity is also slightly higher in September at 90%, compared to 82% in May. For a closer look at weather specifics in May, visit Portsoy weather in May.

In comparing the weather of September and June, both months experience similar maximum temperatures, peaking at around 19°C (66°F). However, September tends to be slightly warmer on average, with an average temperature of 13°C (56°F) compared to June's 12°C (54°F). September also sees more precipitation, with 111 mm (4.4 in) falling over 17 days, while June has a lower total of 80 mm (3.1 in) over 12 days. Additionally, September exhibits higher humidity, averaging 90% compared to June's 84%. For a closer look at June's weather specifics, you can check out Portsoy weather in June.

In comparing the weather between September and July, we notice that both months have similar minimum temperatures, with September averaging a slightly cooler 9°C (48°F) compared to July's 10°C (50°F). However, July boasts a higher average maximum temperature of 21°C (70°F), while September's maximum reaches only 19°C (66°F). Additionally, September experiences more precipitation, with 111 mm (4.4 in) over 17 days, compared to July's 79 mm (3.1 in) over 15 days. Humidity levels are also slightly higher in September at 90%, compared to July’s 86%, indicating a more muggy atmosphere as summer transitions into autumn. For more insights on July weather, you can check out Portsoy weather in July.

In comparing the weather between September and August, September tends to be slightly cooler, with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 19°C (66°F), while August has a slightly milder range, with minimum temperatures at 11°C (52°F) and the same maximum of 19°C (66°F). Additionally, September sees more precipitation at 111 mm (4.4 in) over 17 days, compared to August's 77 mm (3.0 in) over 16 days. Humidity is also higher in September at 90%, compared to 86% in August. For more details, check out Portsoy weather in August.

In September, temperatures typically range from a chilly minimum of 9°C (48°F) to a comfortable maximum of 19°C (66°F), with an average of 13°C (56°F). The month sees considerable rainfall with 111 mm (4.4 in) over 17 days, and humidity remains high at 90%. In contrast, October experiences cooler temperatures, with minimums dropping to 5°C (41°F) and maximums capping at 16°C (62°F), averaging at 11°C (52°F). Rainfall increases to 137 mm (5.4 in) across 24 days, accompanied by a slight uptick in humidity to 91%. For a detailed look at what to expect, check Portsoy weather in October.

September generally offers milder temperatures compared to November, with daytime averages reaching up to 19°C (66°F) versus November's maximum of only 14°C (57°F). However, November experiences more consistent rain, with precipitation measuring 133 mm (5.2 in) over 20 days, compared to September's 111 mm (4.4 in) across 17 days. Additionally, humidity levels are slightly higher in November at 92%, compared to September's 90%. For those interested in a deeper look at the weather during this month in Portsoy, you can find more details here: Portsoy weather in November.

September and December exhibit distinct weather patterns, reflecting the transition from late summer to winter. In September, temperatures average around 13°C (56°F), with a comfortable maximum of 19°C (66°F), while the humidity is relatively high at 90%. Precipitation is notable, with 111 mm (4.4 in) spread over 17 days. In contrast, December presents a cooler climate, with average temperatures dropping to 7°C (44°F) and maximums reaching only 12°C (54°F). Precipitation levels slightly decrease to 107 mm (4.2 in) over 16 days, and humidity remains high at 88%. For a closer look at how December weather manifests in Portsoy, you can explore Portsoy weather in December.

Compare Portsoy's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Portsoy

As summer fades, September in Portsoy brings a noticeable shift in weather, characterized by cooler temperatures and increased rainfall compared to the preceding months. With an average temperature settling around a mild 13°C (56°F), this month often feels crisp, inviting cozy layers and warm beverages. The town experiences frequent showers, averaging about 111 mm of rainfall over 17 days, contributing to the lush landscapes that define the onset of autumn. Humidity levels peak at around 90%, enhancing the brisk, refreshing air. For those interested in exploring all that Portsoy has to offer throughout the year, including its unique climate patterns, visit Portsoy Climate.