September Weather in Grebbestad, Sweden

Last updated: August 27, 2025

In Grebbestad, Sweden, September ushers in a dynamic blend of weather, with temperatures ranging from a comfortable 21°C (70°F) at their peak to a crisp 6°C (42°F) overnight. The average temperature hovers around 14°C (57°F), providing a refreshing atmosphere as fall approaches. This month sees about 107 mm (4.2 in) of rainfall spread over approximately 14 days, contributing to the region's lush greenery. With humidity levels reaching 86%, the coastal charm of Grebbestad is heightened, inviting visitors to experience the serene beauty of the Swedish landscape amid its shifting September weather.

September Temperature in Grebbestad

In September, Grebbestad transitions into the embrace of autumn, showcasing mild temperatures that mark a shift from the summer warmth. With a minimum of 6°C (42°F) and a comfortable average hovering around 14°C (57°F), the days are still pleasantly warm, peaking at a maximum of 21°C (70°F). This month effectively bridges the warmth of summer with the crispness of fall, offering a delightful climate for outdoor activities and scenic strolls along the coastline. As daylight begins to shorten, the changing hues of nature add a captivating charm, making September a remarkable time to experience the beauty of this coastal town.

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

The chart illustrates September temperature patterns in Grebbestad, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grebbestad, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec363437435261636257504337
Data source: Temperature data for Grebbestad 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 Grebbestad

In September, Grebbestad experiences a notable surge in precipitation, with an impressive 107 mm (4.2 in) of rain recorded over approximately 14 days. This marks a distinct increase compared to the preceding summer months, where August already set a high benchmark with 98 mm. The transition into autumn brings a noticeable uptick in wet days, setting the stage for the wetter October ahead, which typically sees even higher rainfall. September’s dampness, coupled with mild temperatures, creates a rich backdrop for the changing leaves and lush landscapes, inviting both locals and visitors to appreciate the serene beauty of this coastal town amidst the showers.

September Precipitation Trends in Grebbestad

The chart displays monthly precipitation patterns in Grebbestad, 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. In Grebbestad, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec586664346271849810712910188
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grebbestad

In Grebbestad, Sweden, September brings a noticeable shift in humidity, with levels rising to 86% after the summer months. This increase comes on the heels of a relatively pleasant summer, where humidity hovered around the low seventies, allowing for comfortable outdoor activities. As autumn approaches, September marks a transition from the drier conditions of summer to a more humid landscape reminiscent of winter's chill, as seen in October with its 92% humidity. Following this trend, the months leading into winter—November and December—maintain high humidity levels, consistently in the low to mid-nineties. Overall, September’s humidity serves as a gentle reminder of the wetter months ahead, setting the stage for the cozy indoor seasons that follow.

September Average Humidity in Grebbestad

This chart illustrates the average monthly humidity levels in Grebbestad, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Grebbestad is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%92%89%82%73%71%72%77%86%92%93%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grebbestad

As September rolls in Grebbestad, Sweden, the UV Index settles at a moderate level of 4, allowing for safe outdoor activities with a burn time of around 30 minutes. This marks a subtle decline from the summer peak, where July and June recorded a high of 7, prompting extra sun protection measures. Following August's mild drop to a 5, September reflects a consistent trend as daylight wanes and the sun's intensity diminishes. With cooler temperatures on the horizon, it's an ideal time to enjoy the beautiful surroundings while remaining mindful of sun exposure. For more details on UV trends throughout the year, explore the Grebbestad UV Index.

Maximum UV Index Levels in Grebbestad for September

The chart shows the monthly maximum UV Index (UVI) for Grebbestad 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. In September, the maximum UV index in Grebbestad typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Grebbestad 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 Grebbestad

As summer gracefully transitions into autumn, September in Grebbestad offers a delightful balance of sunshine, boasting around 290 hours of daylight. This marks a gentle decline from the sun-drenched heights of July and August, which collectively bask in the glow of over 400 hours each. The sunny days of September serve as a farewell to the warm months, creating a vibrant atmosphere where the lingering warmth of summer meets the crispness of fall. While the days grow shorter, the month maintains a rich tapestry of light that invites locals and visitors alike to relish outdoor adventures and stunning coastal views. With a significant drop from the summer peak yet still plentiful, September stands as a serene bridge between the luscious warmth of summer and the enchanting coolness of autumn in Grebbestad.

Monthly Sunshine Duration in Grebbestad: September Highlighted

The September sunshine duration represents the total number of hours Grebbestad 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.
JanFebMarAprMayJunJulAugSepOctNovDec88h170h277h371h431h465h473h404h290h238h136h100h
Data source: Grebbestad September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grebbestad During September

In September, Grebbestad experiences a notably lower chance of sunny weather, with only a 30% likelihood of sun. This decline follows the sunniest months of late spring and summer, where percentages hovered around the mid to high 40s. The gradual drop in sunshine probability reflects a transition into autumn, as temperatures cool and cloud cover increases. Despite being a charming time to explore the coastal beauty of Sweden, visitors should be prepared for the possibility of overcast days, making sunshine a delightful surprise rather than an expectation.

Percentage of Sunny Days in September in Grebbestad

The chart illustrates the percentage of sunny days in Grebbestad 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 Grebbestad experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec34%40%45%58%34%45%46%43%30%29%24%29%
Data source: Grebbestad September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grebbestad in September

As autumn approaches in Grebbestad, September marks a notable transition in daylight duration, with 12 hours of sunlight illuminating the days. This month sees a gradual decline from the summer peak of 18 hours in June and 17 hours in July, reflecting the onset of shorter days ahead. After basking in 16 hours of daylight in May and 15 hours in August, the shortening days remind us of nature’s cyclical rhythm. Following September, daylight continues to wane into October and November, where it dwindles to just 10 and 7 hours respectively. This dance of light is a beautiful reminder of the changing seasons, ushering in an entirely new atmosphere in this charming coastal town.

Average Daylight Hours in Grebbestad for September

The chart illustrates the variation in daylight duration in Grebbestad throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 7m9h 18m11h 52m14h 29m16h 53m18h 15m17h 31m15h 18m12h 45m10h 9m7h 45m6h 22m
Data source: Grebbestad daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Grebbestad

As summer gives way to autumn in Grebbestad, Sweden, September greets residents and visitors with a gentle breeze, averaging 4.8 m/s (11 mph). This marks a subtle increase from the calm winds of August, hinting at the transition into cooler months. The wind speed during this month is comparable to the earlier winter months, such as January and February, which also feature similar gusts at 4.9 m/s and 5.3 m/s respectively. Interestingly, it sets the stage for a notable uptick in wind intensity as October approaches, where the average wind speeds jump to 6.4 m/s (14 mph). This pattern suggests that while the warmth of summer fades, the briskness of fall begins to assert itself, providing a refreshing backdrop for the stunning autumn landscapes of Grebbestad.

Average September Wind Speed in Grebbestad

The chart displays monthly wind speed patterns in Grebbestad, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.95.35.35.14.24.44.04.34.8 m/s6.45.75.2
Data source: Grebbestad September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Grebbestad Compares to Other Months

Weather in Grebbestad varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Grebbestad, focusing on differences in temperature, rainfall, humidity, and UV levels.

September and January present contrasting weather conditions. In September, temperatures generally range from a mild 6°C (42°F) to a comfortable max of 21°C (70°F), accompanied by an average of 14°C (57°F). This month experiences significant rainfall, with 107 mm (4.2 in) spread over 14 days and humidity levels at 86%. In stark contrast, January is quite chilly, with minimum temperatures dropping to -11°C (12°F) and a maximum of only 9°C (49°F), resulting in an average temperature of just 2°C (36°F). January also sees less precipitation, with 58 mm (2.3 in) over 11 days, albeit with a higher humidity of 94%. For more details, you can check Grebbestad weather in January.

September and February present contrasting weather conditions. September features a milder climate, with temperatures ranging from a minimum of 6°C (42°F) to a maximum of 21°C (70°F) and an average of 14°C (57°F). This month experiences substantial precipitation, totaling 107 mm (4.2 in) over approximately 14 days, along with a high humidity level of 86%. In contrast, February is significantly colder, with temperatures dipping from a minimum of -12°C (12°F) to a maximum of 9°C (49°F), averaging just 1°C (34°F). The month sees less precipitation, amounting to 66 mm (2.6 in) across 11 days, but the humidity is slightly higher at 92%. For more detailed weather insights, check out Grebbestad weather in February.

The weather in September typically exhibits milder temperatures compared to March, with average highs reaching around 21°C (70°F) and lows of 6°C (42°F). In contrast, March experiences significantly cooler temperatures, with averages hovering around 3°C (37°F) and nighttime lows dipping to -12°C (11°F). While September is characterized by higher precipitation levels at 107 mm (4.2 in) over approximately 14 days, March sees less rainfall, totaling 64 mm (2.5 in) across about 10 days. Additionally, humidity remains quite high in both months, with September at 86% and March slightly higher at 89%. For a closer look at the specifics of March weather, you can visit Grebbestad weather in March.

September and April present quite different weather experiences. In September, temperatures range from a mild 6°C to a comfortable 21°C, with an average of 14°C, making it more conducive for outdoor activities. However, it also brings with it significant rainfall, averaging 107 mm over about 14 days, while the humidity remains high at 86%. In contrast, April sees cooler temperatures, with a minimum of -5°C and a maximum of 18°C, averaging just 6°C. This month experiences considerably less precipitation, totaling only 34 mm across about 6 days, and lower humidity at 82%. For more detailed information, you can check out Grebbestad weather in April.

When comparing the weather in September and May, notable differences emerge in temperatures and humidity levels. September typically experiences a milder temperature range, with minimums around 6°C (42°F) and maximums reaching 21°C (70°F), resulting in an average of 14°C (57°F). In contrast, May tends to be cooler, with minimums of 2°C (36°F) and maximums peaking at 26°C (79°F), averaging 11°C (52°F). Additionally, September sees higher precipitation levels at 107 mm (4.2 in) over 14 days, while May has only 62 mm (2.4 in) over 11 days, and a lower humidity level of 73% compared to September's 86%. For a closer look at May weather specifics, visit Grebbestad weather in May.

In September, temperatures range from a minimum of 6°C (42°F) to a maximum of 21°C (70°F), with an average of 14°C (57°F). The month sees considerable rainfall, totaling 107 mm (4.2 in) over approximately 14 days, and the humidity remains high at around 86%. In contrast, June experiences milder weather with minimum temperatures of 8°C (47°F) and a warmer maximum of 26°C (79°F), averaging 16°C (61°F). Rainfall is less abundant in June, totaling 71 mm (2.8 in) over 10 days, and the humidity level is notably lower at 71%. For more detailed information about weather conditions, you can check Grebbestad weather in June.

In comparing the weather between September and July, we can see some notable differences. September experiences cooler temperatures, with averages around 14°C (57°F), while July typically enjoys warmer weather, averaging 17°C (64°F) and reaching maximums of 27°C (81°F). Additionally, September sees higher precipitation levels at 107 mm (4.2 in) spread over 14 days, compared to July's 84 mm (3.3 in) over just 10 days. Humidity also varies significantly, with September being more humid at 86% compared to July's 72%. For a more detailed look at July's weather, you can check Grebbestad weather in July.

September experiences cooler temperatures compared to August, with a minimum of 6°C (42°F) and an average of 14°C (57°F), while August sees a minima of 10°C (51°F) and an average of 17°C (62°F). The maximum temperatures in September peak at 21°C (70°F), significantly lower than August's comfortable high of 28°C (83°F). In terms of precipitation, both months are similar, with September receiving slightly more at 107 mm (4.2 in) compared to August's 98 mm (3.9 in), but both months experience rainfall on 14 days. September's humidity is higher at 86%, making it feel more damp than August, which has a humidity of 77%. For more detailed weather information, check out Grebbestad weather in August.

In September, the weather is relatively mild, with average temperatures ranging from a minimum of 6°C (42°F) to a maximum of 21°C (70°F). However, as we transition into October, temperatures drop significantly, with averages sitting between 0°C (33°F) and 17°C (62°F). Additionally, October experiences slightly more precipitation, totaling 129 mm (5.1 in) over 17 days compared to September's 107 mm (4.2 in) across 14 days. Humidity also increases in October, reaching 92% compared to September's 86%. For more details on October's weather, you can check Grebbestad weather in October.

In September, the weather typically features mild temperatures, with an average around 14°C (57°F) and daytime highs peaking at 21°C (70°F). However, as the month progresses into November, the climate takes a colder turn, dropping to an average of just 6°C (43°F) with nighttime lows reaching -5°C (23°F). Both months experience significant rainfall, with September seeing approximately 107 mm (4.2 in) across 14 days, while November has slightly less precipitation at 100 mm (4.0 in) over 15 days. Additionally, humidity levels rise in November, reaching 93%, compared to September's 86%. For more details on how November weather can impact your plans, check out Grebbestad weather in November.

September and December showcase a stark contrast in weather conditions. In September, temperatures range from a minimum of 6°C (42°F) to a maximum of 21°C (70°F), with an average of 14°C (57°F). This month experiences 107 mm (4.2 in) of precipitation over approximately 14 days, accompanied by a relatively high humidity level of 86%. In contrast, December brings much colder temperatures, with a minimum of -7°C (19°F) and a maximum of only 10°C (50°F), averaging 3°C (37°F). The precipitation during December totals 88 mm (3.5 in) over about 16 days, along with even higher humidity at 93%. For more details on December conditions, visit Grebbestad weather in December.

Compare Grebbestad's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Grebbestad

As September rolls into Grebbestad, the weather showcases a distinct transition, gently ushering in the cooler embrace of autumn. With a maximum temperature hovering around a comfortable 21°C, the month still offers pleasant afternoons, yet the average cools to 14°C, revealing the shift from summer warmth. However, the increase in rainfall, totaling 107 mm over 14 days, and a humidity level of 86% contribute to a more moist atmosphere, setting September apart from the drier summer months. This blend of lingering warmth and growing dampness creates a unique atmosphere, ideal for those looking to experience the serene beauty of Grebbestad as it prepares for the changing seasons. For a detailed overview of the region's climatic patterns, visit Grebbestad Climate.