Last updated: August 21, 2025
September in Pärnu, Estonia presents a delightful transition into autumn, where temperatures range from a pleasant maximum of 25°C (78°F) to a crisp minimum of -2°C (29°F). The average temperature hovers around a comfortable 13°C (55°F), making it a favorable time for outdoor exploration. However, visitors should be prepared for occasional showers, as the month sees an average precipitation of 76 mm (3.0 in) across 13 days. With humidity levels at 87%, the air carries a fresh, invigorating quality, perfect for enjoying the scenic beauty and vibrant culture of this charming coastal town.
In September, Pärnu, Estonia experiences a significant transition towards autumn, with temperatures ranging from a chilly -2°C (29°F) at night to a pleasant 25°C (78°F) during the day. The average temperature settles around 13°C (55°F), offering a balanced climate that invites both locals and visitors to enjoy outdoor activities. As the month progresses, there’s a clear decline from the warmth of summer, but the lingering pleasant days serve as a gentle reminder of the season just passed. This month marks a pivotal shift as the once-baking summer temperatures gracefully recede, paving the way for the crispness of fall, making September a unique and inviting time in Pärnu.
In September, Pärnu experiences a notable shift in precipitation patterns, receiving 76 mm (3.0 in) of rain over 13 days. This marks a decrease from the peak summer months, but still captures the lingering essence of early autumn. Following August's 94 mm (3.7 in), September showcases a strong consistent rainfall that maintains the lush greenery of the region. The transition into fall is evident as the days grow shorter and the atmosphere shifts, creating a unique blend of vibrant foliage and refreshing showers. As summer's grasp loosens, Pärnu's weather serves as a reminder of the changing seasons, setting the stage for the cooler months ahead.
In September, Pärnu experiences a notable increase in humidity, reaching 87%, a slight rebound from the drier months of May to August. As the summer heat fades, this uptick signals a return to the more typical patterns seen earlier in the year, where humidity levels hover around the 90% mark in the colder months. This trend highlights Pärnu's transitional climate, where the soil and air begin to retain moisture more effectively as autumn sets in, creating a refreshing atmosphere for both residents and visitors alike. With the approach of October, humidity inches back up to 90%, urging a cozy transition into the winter months.
As September rolls into Pärnu, Estonia, the UV Index reflects a significant dip from the peak summer months, settling at a moderate level of 4. This indicates a moderate exposure category, with a burn time of approximately 30 minutes for fair-skinned individuals. Following the high indices of 7 in July and August, which required careful sun protection, September encourages a more relaxed approach while still reminding sun lovers to be cautious during peak hours. This transitional month marks the approach of fall, characterized by other seasonal changes, yet it still offers ample opportunity for outdoor activities. Be sure to stay informed about daily fluctuations in UV levels through resources like Paernu UV Index.
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September in Pärnu, Estonia, brings a delightful transition from the sun-soaked summer months to the crisp embrace of autumn. With 307 hours of sunshine, it stands as a vibrant reminder of the warmth of summer, although it's a noticeable dip from the 395 hours enjoyed in August. This decrease marks the beginning of a seasonal shift, as the daylight hours gradually wane. Following a consistent upward trend from January’s meager 66 hours to August’s peak, September maintains a respectable amount of sunlight, offering residents and visitors alike a chance to savor the tail end of pleasant weather before the shorter days of October set in. As the harvest season unfolds, the golden hues of early autumn lend a picturesque backdrop to the lingering sunlight, creating a perfect blend of warmth and beauty in this charming coastal town.
In Pärnu, Estonia, September marks a transition as summer fades into autumn, reflected in a modest 30% chance of sunny weather. This statistic aligns closely with the month of May but contrasts with the sun-drenched months of June and July, where the probability of sunshine peaks at 53%. As the year progresses, the likelihood of sun begins to wane in the fall, mirroring the gradual decline witnessed from August’s 27%. Despite the drop in sunny days, September still offers a pleasant surprise for those seeking to enjoy the last warm rays of summer, making it an appealing month for outdoor activities in this charming coastal city.
As September arrives in Pärnu, Estonia, the long, sunlit days of summer begin to wane, settling into a comfortable average of 12 hours of daylight. This gradual transition reflects a consistent trend, where daylight duration peaks in the vibrant month of June with 18 hours, before gently descending toward autumn. The shift from the bright, 16-hour days of May to September's more subdued light illustrates a harmonious rhythm of nature, inviting residents and visitors alike to savor the cooler air and changing colors. The month serves as a bridge, offering a delightful balance of light before the shorter days of October set in, with only 10 hours of daylight on the horizon.
As autumn descends upon Pärnu, Estonia, September emerges as a transition month, showcasing an average wind speed of 3.9 m/s (9 mph). This gentle breeze reflects a slight uptick from the calmer months of summer, where June recorded a low of 2.7 m/s. Interestingly, the winds begin to pick up ahead of October's brisk 4.8 m/s average, suggesting a precursor to the gustier days ahead. Overall, September stands out as a time when nature begins to shift, gently reminding us of the invigorating winds of fall while still maintaining a mild and enjoyable atmosphere for both locals and visitors alike.
Weather in Paernu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Paernu, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present a stark contrast in weather. September sees milder temperatures, with averages around 13°C (55°F) and a maximum of 25°C (78°F), making it a pleasant month for outdoor activities. In contrast, January experiences much colder temperatures, with averages plummeting to -1°C (30°F) and maximums only reaching 8°C (46°F). Additionally, while September has more rain, totaling 76 mm (3.0 in) over 13 days, January is drier with just 41 mm (1.6 in) over 9 days. Humidity is notably high in both months, peaking at 87% in September and reaching 92% in January. For more detailed information, check out Paernu weather in January.
September and February showcase starkly contrasting weather conditions. In September, temperatures range from a chilly -2°C (29°F) at night to a pleasant high of 25°C (78°F) during the day, with an average of 13°C (55°F). This month sees about 76 mm (3.0 in) of precipitation spread over 13 days and maintains a humidity level of 87%. In contrast, February is characterized by much colder temperatures, with a minimum of -25°C (-14°F) and a maximum of only 8°C (46°F), averaging around -2°C (28°F). February receives less precipitation at 48 mm (1.9 in) over 10 days, accompanied by a slightly higher humidity of 91%. For a deeper look at what to expect, check out Paernu weather in February.
September and March present strikingly different weather conditions. In September, temperatures range from a chilly -2°C (29°F) at night to a pleasant 25°C (78°F) during the day, with an average of around 13°C (55°F). The month sees about 76 mm (3.0 in) of precipitation over 13 days, accompanied by a relatively high humidity level of 87%. In contrast, March is much colder, with temperatures plunging to a minimum of -23°C (-9°F) and reaching a maximum of 13°C (55°F), but averaging just around 0°C (33°F). Precipitation is lower at 54 mm (2.1 in) over 12 days, and humidity is slightly higher at 90%. For more details about the weather in March, you can visit Paernu weather in March.
September and April showcase distinct weather characteristics. In September, temperatures range from a low of -2°C (29°F) to a high of 25°C (78°F), with an average temperature of 13°C (55°F). This month experiences more precipitation, totaling 76 mm (3.0 in) over 13 days, while the humidity remains high at 87%. In contrast, April sees cooler temperatures, with a minimum of -7°C (19°F), an average of 5°C (42°F), and a maximum of 23°C (73°F). Precipitation is lower in April, totaling 47 mm (1.8 in) over a span of 10 days, though the humidity remains consistent at 87%. For a more detailed look at the April weather, you can visit Paernu weather in April.
September and May exhibit distinct differences in weather patterns. September typically experiences milder temperatures, with an average of 13°C (55°F) and a maximum reaching 25°C (78°F). In contrast, May has slightly lower overall temperatures, averaging 11°C (52°F) and peaking at 29°C (84°F). While September has more substantial precipitation at 76 mm (3.0 in) over 13 days, May brings less rain, measuring 53 mm (2.1 in) across just 9 days. Additionally, humidity is notably higher in September at 87%, compared to 76% in May. For a detailed look at May weather in Paernu, you can visit Paernu weather in May.
In comparing the weather of September and June, it becomes evident that June tends to be warmer and sunnier. In June, temperatures range from a minimum of 2°C (36°F) to a maximum of 33°C (92°F), with an average of 17°C (63°F), whereas September sees cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 25°C (78°F), averaging 13°C (55°F). Additionally, while both months see a fair amount of precipitation, with September experiencing slightly more at 76 mm (3.0 in) over 13 days compared to June’s 68 mm (2.7 in) over 12 days, the humidity levels in September are higher at 87%, compared to 80% in June. For more specific details, you can check Paernu weather in June.
When comparing the weather in September and July, notable differences emerge. September tends to be cooler, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 25°C (78°F), while July enjoys a warmer climate, with temperatures starting at a minimum of 5°C (41°F) and peaking at 32°C (90°F). Both months see similar levels of precipitation, with September receiving 76 mm (3.0 in) and July slightly higher at 87 mm (3.4 in), both spread over 13 days. However, September boasts a higher humidity level at 87%, compared to July’s 80%, contributing to a different feel in the air. For more detailed information on July's climate, you can check out Paernu weather in July.
As September arrives, the weather begins to cool down compared to August. The average temperature in September is around 13°C (55°F), significantly lower than August's average of 17°C (63°F). While August features warmer highs of up to 31°C (87°F), September reaches a maximum of 25°C (78°F). Additionally, September experiences a slight increase in precipitation, with 76 mm (3.0 in) falling over 13 days, compared to August's 94 mm (3.7 in) over the same number of days. Humidity levels also rise in September to 87%, slightly above August's 83%. For more detailed information, you can check Paernu weather in August.
September and October present a noticeable transition in weather patterns. In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 25°C (78°F), averaging around 13°C (55°F). The month sees about 76 mm (3.0 in) of precipitation over 13 days, accompanied by a humidity level of 87%.
In contrast, October experiences cooler temperatures, with a minimum of -6°C (22°F) and a maximum of 20°C (67°F), averaging just 8°C (46°F). Precipitation increases slightly to 87 mm (3.4 in) over 14 days, and humidity rises to 90%. For more detailed insights into October's weather conditions, you can visit Paernu weather in October.
In September, the weather typically ranges from a minimum of -2°C (29°F) and averages around 13°C (55°F), reaching a maximum of 25°C (78°F). The month experiences a fair amount of rainfall, with 76 mm (3.0 in) spread across 13 days and humidity levels averaging 87%. In contrast, November presents a much colder climate, with temperatures dipping to a minimum of -8°C (17°F), an average of 4°C (39°F), and a maximum of only 12°C (55°F). While November has slightly less precipitation at 57 mm (2.3 in) over 11 days, the humidity rises to 91%. For a more detailed look, you can check the full Paernu weather in November.
September and December present quite different weather conditions. In September, temperatures range from a minimum of -2°C (29°F) to a warm maximum of 25°C (78°F), with an average of 13°C (55°F). The month experiences 76 mm (3.0 in) of precipitation over 13 days, and humidity levels sit at 87%. In contrast, December brings much colder temperatures, with a minimum of -20°C (-4°F) and a maximum of 8°C (47°F), averaging around 0°C (32°F). Additionally, December sees less precipitation at 54 mm (2.1 in) over the same number of days but has slightly higher humidity at 90%. For those interested in exploring the cold winter climate, check out the specifics of Paernu weather in December.
As September unfolds in Pärnu, the weather begins to shift noticeably from the warmth of summer, transitioning into the cooler embrace of autumn. With temperatures dipping from delightful highs to brisk lows, September offers a unique blend of mild days and chilly evenings, which distinguishes it from the warmer months. This month generally experiences increased precipitation, with several rainy days, contributing to a humid atmosphere that typically lingers around 87%. As nature prepares for the onset of fall, September in Pärnu is characterized by its changing rhythms, inviting residents and visitors alike to experience the beauty of a season in transition. For more insights on weather patterns throughout the year, check out Paernu Climate.