September Weather in Liepaja, Latvia

Last updated: August 21, 2025

September in Liepaja, Latvia presents a delightful transition into autumn, showcasing a pleasing range of temperatures that peak at a comfortable 26°C (79°F) and dip to a refreshing 4°C (40°F). With an average temperature of 15°C (59°F), residents and visitors alike can enjoy the crisp air and subtle changes in the landscape. However, this month is not without its showers, as 94 mm (3.7 in) of precipitation falls over 13 days, resulting in a humidity level of 85%. Embrace the charm of early autumn in Liepaja, where every day offers a unique blend of mild warmth and the playful dance of occasional raindrops.

September Temperature in Liepaja

As summer gently gives way to autumn, Liepaja, Latvia, experiences a delightful transition in September. With temperatures ranging from a minimum of 4°C (40°F) to a maximum of 26°C (79°F), the month exhibits a refreshing warmth that invites both locals and visitors to explore its beautiful coastline. The average temperature settles around 15°C (59°F), striking a pleasant balance between the lingering summer heat and the briskness of fall. This gradual shift not only enhances the vibrant colors of the surrounding landscapes but also encourages outdoor activities, making September an ideal time to enjoy Liepaja's scenic charm before the chill of winter sets in.

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

The chart illustrates September temperature patterns in Liepaja, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Liepaja, 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).
JanFebMarAprMayJunJulAugSepOctNovDec343336435162646458514436
Data source: Temperature data for Liepaja 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 Liepaja

September in Liepaja, Latvia, marks a notable shift in precipitation patterns as the region transitions into autumn. With 94 mm (3.7 in) of rainfall over 13 days, September sees the highest monthly precipitation thus far in the year—a telling sign of the changing seasons. This increase follows the wetter months of July and August, suggesting a trend of heightened moisture as summer wanes. The spike in September rainfall prepares the landscape for the even wetter October that looms ahead, which typically brings 111 mm (4.4 in). As temperatures cool, the rainfall serves as a reminder of the approaching winter, highlighting Latvia's dynamic climate patterns.

September Precipitation Trends in Liepaja

The chart displays monthly precipitation patterns in Liepaja, 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 Liepaja, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec5147513231488779941117772
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Liepaja

In Liepaja, Latvia, September brings a moderate humidity level of 85%, reflecting a shift from the summer months. As the year progresses, it's clear that humidity peaks in the winter, starting at a substantial 90% in January and hovering around 89% in February and October. The warmer months of May through August see a noticeable dip, with humidity levels dropping to their lowest at 77% in May. However, as summer fades into autumn, conditions become more humid again, signaling a transition typical of the Baltic coastal climate. Overall, September offers a comfortable balance, preparing residents for the wetter months ahead as the year approaches its close.

September Average Humidity in Liepaja

This chart illustrates the average monthly humidity levels in Liepaja, 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 Liepaja is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%89%87%77%79%79%81%85%89%90%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Liepaja

As September rolls into Liepaja, Latvia, the UV Index begins to taper off from the summer highs, falling to 5 and placing it in the moderate exposure category. This means residents and visitors can still enjoy outdoor activities, but it's wise to remain vigilant about sun protection, with a burn time of approximately 30 minutes. Compared to the peak summer months, where the UV Index soared to 7, September’s conditions signal a gentler sun, yet awareness remains key. As the seasons shift, it's a perfect time to bask in the lingering warmth of late summer while keeping safety in mind. For more detailed information on the UV Index throughout the year, check Liepaja UV Index.

Maximum UV Index Levels in Liepaja for September

The chart shows the monthly maximum UV Index (UVI) for Liepaja 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 Liepaja typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123567765311
Data source: Liepaja 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 Liepaja

As September arrives in Liepaja, Latvia, the city basks in a delightful 320 hours of sunshine, a fitting transition from the summer's peak brightness. The gradual shift from the vibrant sun-soaked months of June and July, which boast nearly 470 hours, marks the onset of a more temperate season. The sunshine in September, while decreased compared to the humid summer, still exudes a warm charm that extends the outdoor experiences of the late summer. Comparatively, it stands as a significant step down from August's 404 hours, yet offers a generous buffer before the crisp, shorter days of October arrive with only 240 hours. This trend reflects the gradual descent into autumn, inviting residents and visitors to savor the lingering warmth and golden light of early autumn days.

Monthly Sunshine Duration in Liepaja: September Highlighted

The September sunshine duration represents the total number of hours Liepaja 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.
JanFebMarAprMayJunJulAugSepOctNovDec93h188h267h366h448h468h463h404h320h240h147h104h
Data source: Liepaja September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Liepaja During September

As summer transitions into autumn, the likelihood of sunny weather in September in Liepaja, Latvia, stands at a modest 37%. This marks a slight dip from the sun-soaked days of June, which boasts a peak of 65%, and reflects a trend where the chances of sunlight gradually decrease as the year progresses. Although September offers a greater likelihood of sunshine compared to the chillier months of November and December, it tends to be less than the vibrant months of April and May. This transitional month hints at shorter days, yet keeps a flicker of summer warmth alive, making it a delightful time for those hoping to catch some rays before the onset of autumn’s gloom.

Percentage of Sunny Days in September in Liepaja

The chart illustrates the percentage of sunny days in Liepaja 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 Liepaja experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec9%34%38%42%39%65%53%33%37%34%21%25%
Data source: Liepaja September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Liepaja in September

As the vibrant summer months wane, September in Liepaja, Latvia sees daylight recede to 12 hours—a gentle decline from the peak of 17 hours in June. This month marks a transition from the sun-drenched days of summer, providing a balance between the lingering warmth of late summer and the encroaching chill of autumn. Following September, daylight swiftly diminishes, with October bringing just 10 hours and November shrinking to 8 hours, reminiscent of the long winter ahead. The gradual decrease in daylight not only reflects the changing seasons but also invites a deeper appreciation for the sunlit moments that linger before the darker months set in.

Average Daylight Hours in Liepaja for September

The chart illustrates the variation in daylight duration in Liepaja throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 34m9h 32m11h 53m14h 17m16h 26m17h 37m16h 59m15h 1m12h 41m10h 19m8h 8m6h 55m
Data source: Liepaja daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Liepaja

In September, Liepaja experiences a refreshing average wind speed of 5.4 m/s (12 mph), maintaining a balance reminiscent of the summer's gentle breezes while hinting at the brisk winds to come in the fall. This month sees a slight uptick in wind speed compared to the calmer summer months, fostering a dynamic atmosphere that invigorates the coastal landscape. As autumn approaches, the winds begin to strengthen, with October ushering in a notable increase to 6.5 m/s (15 mph). Overall, September serves as a transitional period, where the warmth of summer gives way to the crisp, revitalizing gusts of autumn, invigorating both the air and the spirit in this coastal gem of Latvia.

Average September Wind Speed in Liepaja

The chart displays monthly wind speed patterns in Liepaja, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.45.35.75.94.93.54.25.25.4 m/s6.56.16.0
Data source: Liepaja September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Liepaja Compares to Other Months

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

September and January present strikingly contrasting weather conditions. In September, temperatures range from a mild 4°C (40°F) at night to a pleasant average of 15°C (59°F) during the day, reaching a maximum of 26°C (79°F). This month also experiences higher precipitation at 94 mm (3.7 in) over approximately 13 days, accompanied by a humidity level of 85%. In stark contrast, January is much colder, with temperatures plummeting to a minimum of -14°C (7°F) and only reaching a daytime maximum of 8°C (47°F). January sees reduced precipitation of 51 mm (2.0 in) across the same number of rainy days, along with increased humidity at 90%. For more details on January weather, check out this link: Liepaja weather in January.

In September, the weather in Liepaja is considerably milder, with average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 26°C (79°F), and overall average temperatures around 15°C (59°F). The month experiences higher precipitation levels of 94 mm (3.7 in) over 13 days, along with 85% humidity, leading to a damp, yet warm climate.

Conversely, February brings much colder conditions with average temperatures falling between a minimum of -15°C (5°F) and a maximum of 10°C (50°F), averaging around 0°C (33°F). Precipitation is lower at 47 mm (1.8 in) over just 10 days, but the humidity remains slightly higher at 89%. For more detailed information about February weather in Liepaja, visit Liepaja weather in February.

September and March present contrasting weather patterns. September boasts a milder climate with temperatures ranging from a minimum of 4°C (40°F) to a comfortable maximum of 26°C (79°F), while averaging around 15°C (59°F). It also experiences significant rainfall, with 94 mm (3.7 in) spread over 13 days and a humidity level of 85%. In stark contrast, March is much colder, with temperatures dropping as low as -17°C (3°F) and averaging only 2°C (36°F), peaking at 12°C (54°F). This month sees less precipitation, totaling 51 mm (2.0 in), but has a similarly frequent occurrence of rain on 13 days, with humidity slightly higher at 89%. For more details on March weather, visit Liepaja weather in March.

When comparing the weather conditions in September and April, it's clear that September tends to be much milder and warmer. September's average temperature of 15°C (59°F) surpasses April's average of 6°C (43°F), with September experiencing maximum temperatures reaching as high as 26°C (79°F), while April peaks at 22°C (71°F). Additionally, September is wetter, with 94 mm (3.7 in) of precipitation over 13 days, compared to April's 32 mm (1.2 in) over just 8 days. Despite slightly higher humidity levels in April at 87% versus September's 85%, the overall comfort level is typically higher in the warmer September climate. For a more detailed look at April's weather patterns, you can visit Liepaja weather in April.

In September, temperatures typically range from a minimum of 4°C (40°F) to a maximum of 26°C (79°F), with an average of 15°C (59°F). The month experiences about 94 mm (3.7 in) of precipitation spread over 13 days, accompanied by high humidity levels of 85%. In contrast, May offers cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 23°C (74°F), averaging around 11°C (51°F). Precipitation is significantly less in May, totaling 31 mm (1.2 in) over just 7 days, and the humidity remains lower at 77%. Overall, September tends to be warmer and wetter compared to the cooler and drier conditions of May. For more detailed information, check out Liepaja weather in May.

In comparing the weather of September and June, we see that September experiences slightly cooler temperatures, with a minimum of 4°C and an average high of 26°C, while June offers marginally warmer temperatures, starting at a minimum of 5°C and peaking at 28°C. Additionally, September tends to be wetter, with 94 mm of precipitation over 13 days, compared to June's 48 mm over only 8 days. Humidity levels in September are higher at 85%, as opposed to June's 79%, making the former feel more humid despite the similar average temperatures. For a more detailed look at June weather, you can visit Liepaja weather in June.

In comparing the weather of September and July, one can observe notable differences in temperature and humidity. September experiences cooler temperatures, with a minimum of 4°C (40°F) and an average of 15°C (59°F), compared to July, which has a milder minimum of 11°C (52°F) and an average of 18°C (65°F). July also boasts a higher maximum temperature of 29°C (84°F), while September peaks at 26°C (79°F). Additionally, September witnesses more precipitation, averaging 94 mm (3.7 in) over 13 days, in contrast to July's 87 mm (3.4 in) over 12 days, although humidity is slightly higher in September at 85% compared to 79% in July. For more details, check out Liepaja weather in July.

In comparing the weather between August and September, we see a noticeable shift in temperature and precipitation patterns. September features cooler conditions, with average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 26°C (79°F), compared to August's milder range of 11°C (52°F) minimum to 28°C (83°F) maximum. Additionally, September sees increased rainfall, totaling 94 mm (3.7 in) over 13 days, whereas August records a lower precipitation of 79 mm (3.1 in) across 14 days. Humidity levels are slightly higher in September at 85%, compared to 81% in August, indicating a more humid end to the summer. For more details, you can check this link: Liepaja weather in August.

September typically experiences milder temperatures with a minimum of 4°C (40°F) and an average of 15°C (59°F), peaking at 26°C (79°F). In contrast, October sees a noticeable drop, with minimum temperatures falling to 1°C (35°F) and an average of just 10°C (51°F), while the maximum temperature reaches 21°C (69°F). Additionally, October is generally wetter, with 111 mm (4.4 in) of precipitation over 18 days compared to September's 94 mm (3.7 in) over 13 days. Humidity levels also rise slightly in October to 89%, compared to 85% in September. For more details, check out Liepaja weather in October.

In comparing the weather between September and November, notable differences emerge. September experiences a more temperate climate, with average temperatures reaching 15°C (59°F) and highs of 26°C (79°F), alongside 94 mm (3.7 in) of precipitation over 13 days. In contrast, November features colder conditions, with an average temperature of 6°C (44°F) and maximums of only 14°C (57°F). This month sees a decrease in total precipitation to 77 mm (3.0 in) over 15 days, but the humidity rises slightly to 90%. These changes reflect a clear transition from the mild summer to the chillier late autumn months. For more detailed weather insights, you can check Liepaja weather in November.

September and December present stark contrasts in weather, reflecting the transition from late summer to winter. In September, temperatures range from a mild minimum of 4°C (40°F) to an average of 15°C (59°F), with highs reaching up to 26°C (79°F). The month experiences 94 mm (3.7 in) of precipitation across 13 days, accompanied by a humidity level of 85%. In contrast, December sees a significant drop in temperature, with a minimum of -11°C (13°F) and an average of 2°C (36°F), peaking at a maximum of just 9°C (49°F). Although December has less precipitation, totaling 72 mm (2.8 in) over 17 days, the humidity rises to 90%, intensifying the winter chill. For more detailed insights about December weather, you can refer to Liepaja weather in December.

Compare Liepaja's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Liepaja

As September unfolds in Liepaja, the weather transitions into a cooler embrace, contrasting sharply with the warmth of summer months. Daytime temperatures generally hover around a mild average, while nights cool down significantly, signaling the approach of autumn. The increased humidity and precipitation mark a shift towards more overcast days, with an average of nearly half the month experiencing some rain. This combination of factors offers a refreshing change, making September a unique time to experience the coastal charm of Liepaja. For more detailed insights, be sure to check out the comprehensive weather patterns at Liepaja Climate.