Last updated: August 21, 2025
September in Valparaíso, Chile heralds the transition into spring, characterized by pleasant and mild weather conditions. With average temperatures around 12°C (54°F), peaking at a comfortable 15°C (60°F) and dipping to a minimum of 10°C (50°F), this month invites outdoor exploration. Though precipitation is limited, with only 15 mm (0.6 in) falling over two days, humidity levels hover around 56%, contributing to a refreshing atmosphere. Embrace the vibrant beginnings of spring in this coastal gem, where each day brings opportunities for adventure and discovery.
As September arrives in Valparaiso, Chile, the transition from winter to spring is evident in the mild temperatures. The month features a minimum of 10°C (50°F), an average of 12°C (54°F), and a maximum of 15°C (60°F), marking a gradual increase as the city shakes off the cooler months. This rise in temperatures not only heralds the blooming landscapes but also invites locals and tourists alike to enjoy outdoor activities. Compared to the chill of August, which had temperatures dipping as low as 8°C (47°F), September offers a comfortable climate that suggests the joys of the warmer days ahead.
In September, Valparaíso experiences a notable shift as the dry months gradually give way to increased precipitation, accumulating 15 mm (0.6 in) over just two days of rain. This marks a transition from the relatively parched winter months, with heavy rainfall peaking in June at 116 mm (4.6 in), and begins to pave the way for the more humid spring season. As the city shakes off the remnants of winter, the gentle rains of September provide a refreshing contrast to the preceding dryness, hinting at the vibrant growth that comes with the approaching warmer months.
In Valparaiso, Chile, September marks a transitional phase in humidity levels as the city gradually shifts from the damp chills of winter to the more temperate climate of spring. With an average humidity of 56%, September stands out as a pivotal month. Although this figure is significantly lower than the peak levels recorded in the mid-year months, it still reflects a noticeable increase from the drier summer months of January and February, both at 41%. As the region begins to warm, humidity subtly rises again in October to 61%, suggesting that the coastal city's ambiance is on the cusp of embracing the lush vibrancy of spring. This interplay of humidity underscores the unique climatic character of Valparaiso, making it a fascinating destination year-round.
In September, Valparaiso experiences a UV Index of 8, categorized as very high. As winter fades and spring approaches, sun exposure becomes increasingly intense, with a recommended burn time of just 15 minutes. This trend marks a noticeable shift from the moderate levels seen in the winter months, emphasizing the need for sun protection as the days grow longer and the sun's rays become stronger. As the year progresses, the UV Index will escalate further, peaking during the summer months, highlighting the importance of staying informed about local UV levels. For more details and insights, visit Valparaiso UV Index.
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As September rolls in, Valparaíso, Chile welcomes a delightful transition from winter's chill to the embrace of spring. With 315 hours of sunshine gracing the month, the city begins to shake off the dreariness experienced in the previous months, which saw significantly lower light—particularly in June and July. This steady climb from winter’s lows is particularly heartening, as it signals a resurgence of warmth and vitality, setting the stage for even sunnier days ahead. Just around the corner, October promises a striking increase, with 363 hours of glorious sunlight, underscoring the vibrant shift in the seasons. September serves as a beautiful reminder of nature's rhythm, offering residents and visitors alike a perfect blend of pleasant weather and stunning coastal vistas.
September marks a notable shift in Valparaíso, Chile, as the chances of sunny weather rise to 70%, making it one of the sunniest months of the year. Following the winter months with their lower probabilities of sunshine, September signals the start of spring, bringing an invigorating warmth and clearer skies. This trend continues into October, where sun-seekers can expect an even brighter 77% chance of glorious rays. With each passing month, the delightful shift from the chill of winter to the warm embrace of spring becomes increasingly evident, making September an ideal time for outdoor adventures and enjoying the vibrant beauty of this coastal city.
As the seasons shift in Valparaíso, Chile, September marks a gentle return to longer days, with daylight lasting approximately 11 hours. Following the darker winter months of June and July, which see only about 9 to 10 hours of daylight, this month serves as a bridge between the brief light of winter and the bountiful brightness of summer. By October, daylight expands to 12 hours, heralding the approach of the sun-drenched months of November and December that feature up to 14 hours of daylight. This gradual increase not only enhances outdoor activities but also uplifts the spirits, as the city transitions from the cozy embrace of winter to the vibrant warmth of spring.
As September dawns in Valparaiso, Chile, the average wind speed picks up, reaching 5.9 m/s (13 mph). This marks a notable increase from the preceding months, especially when compared to the calmer breezes of August. It’s a gentle reminder that spring is in the air, with winds gradually intensifying as the year progresses. In fact, September sees a continuation of this upward trend, leading into October, which boasts even brisker conditions at 6.3 m/s (14 mph). This seasonal shift invites locals and visitors alike to embrace the invigorating gusts that sweep through the coastal city, making it a perfect time for outdoor activities and scenic explorations.
Weather in Valparaiso varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Valparaiso, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is cooler and wetter, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 15°C (60°F) and an average of 12°C (54°F). The month sees about 15 mm (0.6 in) of precipitation spread over 2 days, resulting in a humidity level of 56%. In contrast, January features milder conditions, with temperatures from a minimum of 13°C (55°F) to a maximum of 19°C (66°F), averaging 16°C (60°F). The month experiences significantly less rain, with only 6 mm (0.2 in) of precipitation over 0 days and a lower humidity of 41%. For more detailed insight into January’s climate, you can visit Valparaiso weather in January.
September and February in Valparaiso showcase distinct weather patterns. In September, temperatures range from a cooler 10°C (50°F) at night to a mild 15°C (60°F) during the day, accompanied by a relatively high humidity of 56% and light rainfall totaling 15 mm over two days. In contrast, February enjoys warmer conditions, with temperatures starting at a minimum of 14°C (58°F) and peaking at 19°C (66°F). Additionally, February experiences considerably less precipitation, with only 6 mm recorded over the entirety of the month and no rainy days, leading to a lower humidity of 41%. For more detailed information, you can explore Valparaiso weather in February.
In comparing the weather between September and March, March tends to be slightly warmer, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 19°C (67°F), compared to September's cooler range of 10°C (50°F) to 15°C (60°F). Precipitation is less frequent in March, with no recorded rainy days and only 5 mm (0.2 in), while September sees some rainfall, accumulating to 15 mm (0.6 in) over two days. Additionally, March has lower humidity at 46%, making it feel more comfortable than September's 56%. For a detailed look at the specifics, you can check Valparaiso weather in March.
In comparing the weather of September and April, we see a slight increase in temperature during April, with averages around 14°C (58°F) compared to September's 12°C (54°F). The maximum temperatures are also higher in April, reaching up to 17°C (64°F), while September peaks at 15°C (60°F). In terms of precipitation, September experiences slightly more rainfall at 15 mm (0.6 in) over 2 days, whereas April sees an average of 9 mm (0.4 in) on only 1 day, resulting in a drier climate. Humidity levels are comparable, with September at 56% and April slightly lower at 52%. For more details on April weather, you can check Valparaiso weather in April.
September in Valparaiso is characterized by cooler temperatures, with an average around 12°C (54°F) and a maximum reaching only 15°C (60°F). The month receives about 15 mm (0.6 in) of precipitation over just two days, and the humidity averages 56%. In contrast, May offers slightly warmer conditions, with an average temperature of 14°C (57°F) and highs up to 17°C (63°F). However, it is wetter, with around 50 mm (2.0 in) of rainfall occurring over three days, and humidity levels rise to 64%. For more details, visit Valparaiso weather in May.
The weather in September is generally cooler and drier compared to June. September sees minimum temperatures around 10°C (50°F), with average highs reaching 15°C (60°F) and only 15 mm of precipitation over just 2 days. In contrast, June experiences slightly lower minimum temperatures at 9°C (48°F) but averages a higher temperature of 13°C (55°F) with maximums hitting 16°C (61°F). June is notably wetter, receiving 116 mm of rainfall across 8 days, contributing to a higher humidity level of 71%. For more details, check out Valparaiso weather in June.
In comparing the weather of September and July, September typically features slightly milder temperatures, with a minimum of 10°C (50°F), averaging 12°C (54°F), and a maximum of 15°C (60°F). In contrast, July sees temperatures ranging from a minimum of 8°C (47°F) to a maximum of 16°C (61°F). July also experiences more precipitation, with 47 mm (1.9 in) falling over 4 days, compared to September's 15 mm (0.6 in) over just 2 days. Additionally, humidity levels are higher in July at 75%, compared to September's 56%. For a more detailed look at July's weather, check out Valparaiso weather in July.
In comparing the weather patterns of September and August, September displays slightly milder temperatures with a minimum of 10°C (50°F) and a maximum of 15°C (60°F), whereas August's temperatures range from a minimum of 8°C (47°F) to a maximum of 14°C (58°F). Both months have an average temperature of around 12°C (54°F), but September experiences significantly less precipitation, with only 15 mm (0.6 in) over 2 days, contrasting with August's 41 mm (1.6 in) over 4 days. Additionally, September is less humid, with a humidity level of 56%, compared to August's higher 73%. For a more detailed look at August's weather, check out Valparaiso weather in August.
September and October exhibit quite similar weather patterns, characterized by minimal temperature variation. Both months experience a minimum temperature of 10°C (50°F), with average temperatures slightly rising from 12°C (54°F) in September to 12°C (55°F) in October. Maximum temperatures remain consistent at 15°C (60°F) for both months. Precipitation decreases slightly from 15 mm (0.6 in) over 2 days in September to 12 mm (0.5 in) over just 1 day in October, while humidity sees a modest increase from 56% in September to 61% in October. For a more detailed outlook, check out the Valparaiso weather in October.
In comparing the weather of September and November, both months exhibit mild temperatures with minimal variation. September records a minimum of 10°C (50°F) and an average of 12°C (54°F), while November sees slightly warmer conditions with an average temperature of 14°C (57°F) and a maximum of 17°C (62°F). Precipitation levels also differ, as September experiences 15 mm (0.6 in) over two days, whereas November enjoys a much drier spell with just 5 mm (0.2 in) and no rainy days. Humidity remains fairly consistent between the two months, with September at 56% and November dipping slightly to 52%. For more details on the November weather, you can refer to Valparaiso weather in November.
In September, the weather is cooler, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 15°C (60°F) and an average of 12°C (54°F). The month has moderate humidity at 56% and experiences a bit of rainfall, with precipitation of 15 mm (0.6 in) over two days. In contrast, December brings milder temperatures, with lows of 12°C (54°F) and highs reaching 17°C (63°F), averaging at 15°C (58°F). Humidity drops to 39%, and the precipitation is significantly lower at just 3 mm (0.1 in) over zero days. For more details on the weather during December, check out Valparaiso weather in December.
As September rolls into Valparaíso, the weather starts to shift noticeably from the chill of winter towards a more welcoming spring atmosphere. With average temperatures hovering around 12°C (54°F), the city experiences a gentle warming trend, inviting residents and visitors alike to enjoy the outdoors. Although there's a modest 15 mm of rain over just a couple of days, the 56% humidity creates a refreshing environment, contrasting with the drier summer months ahead. This transitional period is marked by a sense of renewal, making it an ideal time to explore the vibrant beauty of Valparaíso. For a deeper dive into how this month compares throughout the year, check out Valparaiso Climate.