August Weather in Stornoway, United Kingdom

Last updated: March 17, 2025

Experience the diverse August weather of Stornoway, United Kingdom, where temperatures reach a maximum of 22°C (71°F) and average around 14°C (58°F). With a minimum temperature of 6°C (44°F), visitors are advised to dress in layers to accommodate the fluctuating conditions. This month witnesses significant rainfall, accumulating to 102 mm (4.0 in) over 20 days, creating a beautifully lush landscape. Humidity levels are notably high at 86%, enhancing the maritime atmosphere typical of this charming coastal town. Whether you are exploring its scenic views or enjoying local culture, be prepared for the refreshing, yet unpredictable, embrace of Stornoway's summer climate.

August Temperature in Stornoway

In August, Stornoway offers a pleasant respite from the colder months, with temperatures reflecting the height of summer. The minimum temperature hovers around 6°C (44°F), while the average rises to a comfortable 14°C (58°F), peaking with maximums reaching 22°C (71°F). This month marks a gradual warming trend that starts in the spring, culminating in the warmest temperatures of the year. As the temperatures shift from the cooler July days, August invites residents and visitors alike to enjoy the beauty of the Outer Hebrides in mild, temperate conditions, perfect for outdoor adventures and exploration.

August Weather in Stornoway: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Stornoway, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434244475155585755504643
Data source: Temperature data for Stornoway 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.

August Precipitation in Stornoway

August in Stornoway, United Kingdom, sees a significant uptick in rainfall, matching March with a substantial 102 mm (4.0 in) of precipitation—a notable feature among the summer months. This robust total comes over 20 rainy days, making it one of the wettest months of the year. The trend is consistent with a gradual increase in precipitation that begins in July, often marking the shift from the comparatively dry spell of late spring and early summer to the more water-laden autumn months. With September following closely at 110 mm (4.3 in), it’s clear that August sets the tone for the wetter period ahead, highlighting Stornoway's penchant for persistent moisture even at the height of summer.

August Precipitation Trends in Stornoway

The chart displays monthly precipitation patterns in Stornoway, with values for each month alongside August's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec77991026373708910211012810698
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Stornoway

In August, Stornoway experiences a notable humidity level of 86%, maintaining the high standards set in the summer months. Following the peak of 87% in July, the humidity slightly eases yet remains consistently elevated compared to earlier in the year, with levels hovering around 80% to 84% from January through June. This trend indicates a gradual increase in moisture as the year progresses, peaking in the heart of summer before declining just a touch as autumn approaches. With September mirroring July's humid conditions, it's clear that the coastal climate significantly influences Stornoway's weather patterns, making its summer months feel particularly lush and vibrant.

August Average Humidity in Stornoway

This chart illustrates the average monthly humidity levels in Stornoway, with August's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how August's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%80%80%83%84%87%86%87%86%85%80%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Stornoway

In August, Stornoway experiences a UV Index of 6, placing it in the high exposure category. This indicates a notable trend from the previous summer months, as there has been a slight dip from July's peak of 7. With a burn time of just 25 minutes, sun protection becomes increasingly important. Throughout the year, the UV Index shows a clear progression; starting from a low of 1 in the winter months and gradually climbing to its summer highs during June and July, before tapering off in September. This pattern highlights the significance of monitoring UV levels as summer transitions toward autumn. For more detailed information, visit Stornoway UV Index.

Maximum UV Index Levels in Stornoway for August

The chart shows the monthly maximum UV Index (UVI) for Stornoway in August, 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.
JanFebMarAprMayJunJulAugSepOctNovDec113457764211
Data source: Stornoway August 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.

August Sunshine in Stornoway

August in Stornoway, United Kingdom, shines with a substantial 365 hours of sunlight, marking it as one of the summer's crowning jewels. This month stands out against a backdrop of increasing daylight, peaking after January's mere 53 hours. As the year progresses, the sun gradually makes its presence felt, with a steady rise peaking in June and July. However, even as summer wanes, August maintains a remarkable brightness that exceeds the sunshine of both September's 277 hours and October's 206 hours—a reminder of the lingering warmth of summer before the shorter days of autumn settle in. This trend highlights the unique vibrancy of Stornoway’s summer months, making August a delightful time for visitors and locals alike to bask in the sunshine.

Monthly Sunshine Duration in Stornoway: August Highlighted

The August sunshine duration represents the total number of hours Stornoway experiences direct sunlight during the month of August, excluding cloudy or obstructed periods. This chart compares the sunshine duration of August with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec53h134h203h321h389h398h392h365h277h206h104h69h
Data source: Stornoway August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Stornoway During August

In Stornoway, August typically sees a modest 16% chance of sunny weather, reflecting a trend of decreasing sunshine as summer peaks. Throughout the year, the likelihood of sun varies significantly, with January starting off the year at 31% but gradually tapering down to its lowest point in July at 15%. Despite August being a summer month, the sun’s presence remains elusive, echoing the trend observed in the surrounding months. This pattern continues into the fall, with September and October each offering only a 15% and 19% chance respectively. Overall, those hoping for vibrant sunny days in August should be prepared for a mix of clouds and rain, staying true to Stornoway's reputation for unpredictable weather.

Percentage of Sunny Days in August in Stornoway

The chart illustrates the percentage of sunny days in Stornoway throughout the year, with August 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 Stornoway experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec31%36%17%35%23%18%15%16%15%19%20%25%
Data source: Stornoway August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Stornoway in August

August in Stornoway, United Kingdom, marks a subtle transition as daylight begins to wane, offering around 15 hours of illumination each day. Following the peak of 18 hours in June, the gradual decline is evident as summer gives way to autumn. With 16 hours in May and 17 hours in July, the long, bright days of summer linger, but August signals a shift toward shorter days. As the month progresses, daylight becomes less abundant, reminding residents that autumn is just around the corner. This gradual reduction not only highlights the changing seasons but also sets the stage for the cozy and reflective moments that come with the crisp fall air.

Average Daylight Hours in Stornoway for August

The chart illustrates the variation in daylight duration in Stornoway throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 13m9h 21m11h 52m14h 27m16h 47m18h 5m17h 23m15h 14m12h 44m10h 11m7h 50m6h 30m
Data source: Stornoway daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Stornoway

In August, the winds in Stornoway tend to be a gentle respite from the earlier summer months, with an average speed of 3.5 m/s (8 mph). This slight uptick from July's calmest winds at 3.3 m/s (7 mph) suggests a gradual return to the breezier days of autumn. Following a trend of higher speeds in January through November, where gusts frequently reach over 6 m/s, August stands out as a tranquil moment, leading into the more robust winds of September and October. Overall, this month embodies the serene transition of seasons, bringing a gentle breeze to the shores of Stornoway, reminding us of the beautiful balance between calm and tempestuousness that characterizes the region's climate.

Average August Wind Speed in Stornoway

The chart displays monthly wind speed patterns in Stornoway, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.67.35.84.64.45.03.33.5 m/s4.95.66.55.0
Data source: Stornoway August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Stornoway Compares to Other Months

The weather in Stornoway changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Stornoway and find detailed weather information for every month.

August and January showcase distinctly different weather patterns. In August, temperatures range from a mild minimum of 6°C (44°F) to a pleasant maximum of 22°C (71°F), with an average temperature of 14°C (58°F). The month is quite humid, with an average humidity of 86% and precipitation totaling 102 mm (4.0 in) over 20 days. In contrast, January experiences much cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 13°C (56°F), averaging around 6°C (43°F). Although January tends to have less precipitation at 77 mm (3.0 in) over 13 days, the humidity remains relatively high at 81%. For a more detailed look at January's weather, you can check Stornoway weather in January.

August and February present contrasting weather patterns in Stornoway. In August, temperatures range from a minimum of 6°C (44°F) to a pleasant maximum of 22°C (71°F), with an average of 14°C (58°F). This month experiences considerable precipitation, with 102 mm (4.0 in) spread over 20 days, and a high humidity level of 86%. In contrast, February sees cooler temperatures, with a minimum of -3°C (26°F) and a maximum of 14°C (57°F), averaging around 6°C (43°F). Precipitation is slightly lower at 99 mm (3.9 in) over 16 days, with humidity at 80%. For more detailed information about February weather in Stornoway, visit Stornoway weather in February.

In comparing the weather of August and March, August generally offers milder temperatures, with averages hovering around 14°C (58°F) and maximums reaching 22°C (71°F). In contrast, March tends to be chillier, with average temperatures at 7°C (44°F) and maximums only up to 16°C (60°F). Both months experience similar precipitation levels, with August receiving 102 mm (4.0 in) over about 20 days and March also seeing 102 mm (4.0 in) spread across 19 days. However, August has a slightly higher humidity level at 86%, compared to March's 80%. For more detailed insights, you can check out Stornoway weather in March.

When comparing the weather in August and April, August typically presents milder temperatures with an average of 14°C (58°F), compared to April's cooler average of 8°C (47°F). While both months experience a similar maximum temperature, April can dip to lower minimums, reaching as low as -2°C (29°F), while August's minimum is a more temperate 6°C (44°F). Precipitation is more frequent in August, occurring on 20 days with a total of 102 mm (4.0 in), compared to April's 15 days and 63 mm (2.5 in). The humidity in August is also higher at 86%, contrasted with April's 80%. For a detailed look at the weather specifics, you can check Stornoway weather in April.

In comparing the weather of August and May, we observe notable differences in temperature and precipitation patterns. August generally experiences milder temperatures, with an average of 14°C (58°F) and highs reaching 22°C (71°F), while May sees a cooler average of 10°C (51°F) and a maximum of 24°C (75°F). Precipitation in August is more significant, totaling 102 mm (4.0 in) over 20 days, compared to May's 73 mm (2.9 in) spread across 17 days. Additionally, August tends to be more humid, with an average humidity of 86%, slightly higher than May's 83%. For a detailed look at May's specific weather conditions, you can check Stornoway weather in May.

When comparing the weather in August and June, it's clear that both months experience mild temperatures, but August tends to be slightly warmer. In June, temperatures range from a minimum of 4°C (39°F) to a maximum of 23°C (75°F), with an average of 13°C (56°F). In contrast, August shows a minimum of 6°C (44°F), an average of 14°C (58°F), and a peak of 22°C (71°F). Precipitation levels also differ; August sees more rain, with 102 mm (4.0 in) over 20 days compared to June's 70 mm (2.7 in) across 15 days. Humidity is slightly higher in August at 86%, compared to June's 84%. For a more detailed look at June weather, you can visit Stornoway weather in June.

In comparing the weather patterns of July and August, we see some notable differences. Both months experience similar minimum temperatures, with July averaging at 6°C (43°F) and August slightly higher at 6°C (44°F). However, July tends to be warmer overall, with a maximum temperature peaking at 25°C (77°F), compared to August's maximum of 22°C (71°F). Precipitation is slightly higher in August, totaling 102 mm (4.0 in) over 20 days, while July records 89 mm (3.5 in) across 19 days. Humidity levels remain comparable, with July at 87% and August at 86%. For a more detailed look at July's weather, check out Stornoway weather in July.

August typically enjoys a milder climate with average temperatures reaching 14°C (58°F), while September sees a slight drop to 13°C (55°F). Both months share similar maximum temperatures of 22°C (71°F), yet August generally feels warmer, with a minimum temperature of 6°C (44°F) compared to September’s cooler 1°C (35°F). Precipitation levels are slightly higher in September, totaling 110 mm (4.3 in) over 19 days, compared to August's 102 mm (4.0 in) over 20 days. Humidity levels remain consistent, with August at 86% and September marginally higher at 87%. For more detailed insights, you can check the Stornoway weather in September.

August and October weather exhibit distinct characteristics, reflecting the transition from late summer to autumn. In August, temperatures range from a minimum of 6°C (44°F) to a maximum of 22°C (71°F), with an average of 14°C (58°F), creating a generally mild atmosphere despite experiencing 102 mm (4.0 in) of precipitation over 20 days and high humidity at 86%. In contrast, October sees cooler temperatures, with a minimum of 0°C (33°F) and a maximum of 17°C (63°F), averaging around 10°C (51°F). Precipitation increases slightly to 128 mm (5.0 in) over the same number of days, maintaining the humidity level at 86%. For more detailed information on October weather, you can visit Stornoway weather in October.

When comparing the weather in August and November, we see a notable shift in temperatures and conditions. August enjoys a minimum temperature of 6°C (44°F) and averages around 14°C (58°F), reaching a maximum of 22°C (71°F), which creates a mild atmosphere despite high humidity levels at 86%. In contrast, November experiences a drop in temperatures, with minimums plunging to -3°C (28°F) and average temperatures falling to 8°C (46°F). Although November sees slightly more precipitation at 106 mm (4.2 in) over 17 days compared to August's 102 mm (4.0 in) over 20 days, the humidity remains relatively stable at 85%. For a closer look at the specifics of November weather, check out Stornoway weather in November.

In August, Stornoway experiences a mild climate, with temperatures ranging from a minimum of 6°C (44°F) to a maximum of 22°C (71°F) and an average of 14°C (58°F). The month sees considerable precipitation, totaling 102 mm (4.0 in) over 20 days, and high humidity at 86%. In contrast, December temperatures drop significantly, with a minimum of -3°C (27°F) and a maximum of 14°C (57°F), averaging 6°C (43°F). Precipitation remains similar with 98 mm (3.8 in) over 18 days, but humidity decreases to 79%. This stark shift highlights the seasonal transition from the warmer, wetter August to the colder, drier December. For more details, you can check Stornoway weather in December.

Compare Stornoway's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Stornoway

August in Stornoway brings a unique blend of weather that sets it apart from the other months of the year. With a peak temperature reaching 22°C, this month offers fleeting warmth, yet the overall average remains a cool 14°C. While many days are marked by frequent rainfall, contributing to a notable humidity level of 86%, this is a time when the landscape comes alive with vibrant colors from summer blooms. The combination of wet days and mild temperatures creates a cozy atmosphere, making it a distinct chapter in Stornoway's climate narrative. For a deeper understanding of what to expect throughout the year, explore the full details at Stornoway Climate.