Last updated: August 21, 2025
In September, Castro, Chile experiences a cool and often wet climate, characterized by maximum temperatures reaching 19°C (66°F) and a chilly average of 8°C (47°F), with nighttime lows dipping to -1°C (30°F). This month sees approximately 135 mm (5.3 in) of rainfall spread over 16 days, contributing to a humid atmosphere with an average humidity level of 86%. Visitors and locals alike should be prepared for a mix of sunny and rainy weather, ideal for enjoying the lush, vibrant landscapes that define this picturesque region.
In September, temperatures in Castro, Chile mark a transitional phase as winter gives way to spring. The month showcases a cool climate with minimum temperatures around -1°C (30°F), while the average sits at a brisk 8°C (47°F). As the days progress, there's a pleasant rise in warmth, peaking at a maximum of 19°C (66°F). This slight uptick hints at the approaching summer, especially when compared to the colder winter months that preceded it. With a gradual increase in temperature, September invites a sense of renewal, making it an ideal time to explore the lush landscapes and vibrant culture that characterize this beautiful region.
In September, the city of Castro, Chile experiences significant rainfall, receiving 135 mm (5.3 in) over approximately 16 days. This month typically marks a transition as the region prepares for the wetter months ahead. Precipitation levels are lower compared to the preceding month of August, which boasted 209 mm (8.2 in), yet they remain above the lower averages recorded earlier in the year. The consistent rainfall in September aligns with the trend of increasing precipitation as the seasons change, paving the way for the even wetter October, which averages close at 132 mm (5.2 in). Overall, the recurring pattern of rainfall during this time helps sustain Castro’s lush landscapes, making it a vibrant period for nature enthusiasts and local agriculture alike.
In September, humidity in Castro, Chile, settles at a comfortable 86%, continuing the trend of high moisture levels that characterize the region. This month follows a consistent pattern seen throughout the winter and late winter months, where humidity hovers around 87% in both July and August. As the seasons transition towards summer, the slight decrease to 86% indicates a gradual shift, yet Castro maintains its reputation for a lush, humid environment. Compared to earlier months, September remains a key part of an overall trend of elevated humidity, contributing to the vibrant landscapes and rich ecosystems that define this picturesque locale.
In September, Castro experiences a UV Index rating of 6, placing it in the high exposure category with a burn time of 25 minutes. This indicates a shift from the lower index values of the mid-year months, such as June and July, where the UV Index barely reached 2. As spring approaches, the UV intensity begins to climb again, a trend that continues into the more intense summer months. Comparatively, the UV Index will rise to 8 in October, signifying the need for greater sun protection as outdoor activities increase. Staying informed about the UV Index is essential for enjoying the beautiful environment of Castro safely. For more detailed information, visit the Castro UV Index.
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As the days grow longer in September, Castro, Chile, welcomes a refreshing return of sunshine, boasting 243 hours of sunlight. This marks a notable increase from the dimmer winter months of June and July, which recorded only 141 and 175 hours, respectively. With September's light illuminating the path into spring, residents and visitors alike can revel in the outdoors, drawing energy from the vibrant days as they transition towards the brighter months of October and December, where sunshine peaks at an impressive 281 and 346 hours. This upward trend not only lifts spirits but also enhances the beauty of the lush landscapes characteristic of the region, making September a perfect time to embrace the natural splendor of Chile.
As summer fades and autumn approaches in Castro, Chile, September brings a modest 30% chance of sunny weather. This marks a slight increase from the winter months, where the prospects for sunshine drop to their lowest, hovering between 24% and 32%. Comparatively, September's sunshine likelihood is more promising than the preceding months of August and July but still lags behind the peak summer months of February and January. While sunny days may be limited, the transitional period fosters a sense of anticipation for the clearer skies of the following spring, reminiscent of the 53% likelihood observed in December. This gradual shift hints at nature's reluctance to let go of warmth just yet, making September a blend of lingering summer vibes and the crispness of fall.
As the seasons transition, September in Castro, Chile marks a notable shift in daylight duration, showcasing 11 hours of sunlight that begins to bridge the gap between the shorter days of winter and the lengthening days of spring. Following the winter months where daylight dipped to a mere 9 hours from June to August, September provides a refreshing increase in light, hinting at the warmth of October and November, which enjoy 13 and 14 hours of daylight respectively. This gradual ascent in daylight hours not only lifts spirits but also signals the return of vibrant outdoor activities, making it a delightful time for residents and visitors alike to embrace the emerging springtime energy.
As September unfolds in Castro, Chile, the winds offer a gentle caress, with an average speed of 2.8 m/s (6 mph). This month marks a slight decline from the blusterier August, which boasted the highest winds of the year at 3.3 m/s (7 mph). Interestingly, the tail end of winter hints at a transitional calm, with the wind speeds stabilizing around the 6 mph mark through late spring and early fall. Observing the trends, October may continue this peaceful ambiance, maintaining an average of 2.9 m/s (6 mph), creating a serene backdrop for the vibrant change of seasons. Overall, September encapsulates a tranquil moment, setting the stage for the lively dance of spring to come.
Weather in Castro varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Castro, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, significant differences are evident. September experiences cooler temperatures, with averages around 8°C (47°F) and maximums reaching only 19°C (66°F). This month also sees higher precipitation levels, totaling 135 mm (5.3 in) over 16 days, accompanied by a humidity level of 86%. In contrast, January boasts warmer temperatures with an average of 14°C (58°F) and peaks at a comfortable 29°C (84°F). Additionally, precipitation in January is notably lower at 49 mm (1.9 in) over just 9 days, and the humidity slightly reduces to 83%. For more detailed information, you can check Castro weather in January.
September and February present distinct contrasts in weather patterns. In September, temperatures range from a chilly minimum of -1°C (30°F) to a pleasant maximum of 19°C (66°F), with an average around 8°C (47°F). This month is characterized by high humidity at 86% and significant rainfall, accumulating to 135 mm (5.3 in) over 16 days. In contrast, February boasts warmer conditions, with temperatures starting at a comfortable minimum of 4°C (40°F) and reaching up to 35°C (95°F), averaging 15°C (60°F). Precipitation is notably lower at 40 mm (1.6 in), spread over just 6 days, while humidity remains relatively high at 85%. For a closer look at February weather specifics, you can visit Castro weather in February.
When comparing the weather in September and March, notable differences emerge in temperature and precipitation patterns. September typically has cooler temperatures, ranging from a minimum of -1°C (30°F) to a maximum of 19°C (66°F), with an average temperature of 8°C (47°F). In contrast, March presents milder conditions, with minimums around 2°C (36°F) and maximums reaching 29°C (84°F), averaging 13°C (56°F). Precipitation is also higher in September, totaling 135 mm (5.3 inches) over 16 days, compared to March's 82 mm (3.2 inches) over just 11 days. Despite these differences, both months maintain relatively high humidity levels, with September at 86% and March slightly lower at 82%. For a more comprehensive overview of March weather, you can visit Castro weather in March.
In comparing the weather between September and April, it's clear that both months experience similar minimum temperatures, hovering around -1°C (30°F to 31°F). However, April generally sees a warmer average temperature of 11°C (52°F) compared to September's 8°C (47°F), and reaches higher maximums of 22°C (72°F) versus September's 19°C (66°F). Precipitation is fairly consistent, with September receiving 135 mm (5.3 in) over 16 days and April slightly less at 123 mm (4.8 in) over 15 days. Humidity remains relatively high in both months, with September at 86% and April a touch higher at 87%. For more detailed information, you can check Castro weather in April.
In comparing the weather of September and May, we see some interesting similarities and differences. September features mild temperatures, with a minimum of -1°C (30°F), an average of 8°C (47°F), and a maximum of 19°C (66°F). It experiences 135 mm (5.3 in) of precipitation over 16 days, coupled with high humidity at 86%. In contrast, May has slightly cooler temperatures, with a minimum of -2°C (29°F), an average of 9°C (49°F), and a maximum of 18°C (65°F). It also has higher precipitation, totaling 173 mm (6.8 in) over 17 days, and similarly high humidity at 87%. Both months are characterized by significant rainfall and relatively cool temperatures, but May tends to be wetter than September. For more details on the weather in May, visit Castro weather in May.
In comparing the weather between September and June, we can observe distinct differences in temperature and precipitation patterns. September boasts a milder temperature range, with a minimum of -1°C (30°F) and an average of 8°C (47°F), reaching a maximum of 19°C (66°F). In contrast, June experiences slightly cooler temperatures, peaking at 15°C (60°F) with a minimum of -3°C (26°F) and an average of 7°C (45°F). Moreover, June sees higher precipitation levels, totaling 207 mm (8.2 in) over 21 days, compared to September's 135 mm (5.3 in) over 16 days. Interestingly, both months share the same humidity level of 86%, contributing to a damp atmosphere. For more detailed information on June weather, refer to Castro weather in June.
In comparing the weather between September and July, September generally experiences milder temperatures, with a minimum of -1°C (30°F) and an average of 8°C (47°F), compared to July's lower minimum of -3°C (27°F) and an average of 7°C (45°F). While September sees a maximum temperature of 19°C (66°F), July's maximum is significantly cooler at 13°C (56°F). Precipitation is relatively high in both months, with September receiving 135 mm (5.3 in) over 16 days, while July has 165 mm (6.5 in) over 18 days. Humidity remains similar, with September at 86% and July slightly higher at 87%. For more details, you can check Castro weather in July.
In comparing the weather of September and August, September generally presents milder temperatures, with average highs around 19°C (66°F) compared to August's maximum of 15°C (59°F). The minimum temperatures in September are slightly warmer too, averaging -1°C (30°F) versus August's -3°C (27°F). However, September experiences more precipitation, totaling 135 mm (5.3 in) over 16 days, while August sees higher rainfall at 209 mm (8.2 in) spread across 20 days. Humidity levels are quite close, with September at 86% and August slightly higher at 87%. For more detailed weather insights for August, check out Castro weather in August.
In comparing the weather between September and October, we see a slight shift in temperatures and precipitation patterns. September has an average temperature of 8°C (47°F) with a maximum of 19°C (66°F), while October sees a slight increase in the average temperature to 9°C (49°F) and a maximum of 22°C (72°F). Despite the warmer temperatures in October, both months experience similar levels of precipitation, with 135 mm (5.3 in) in September and 132 mm (5.2 in) in October, albeit over a slightly greater number of rainy days in October—18 days compared to September's 16 days. Humidity remains relatively high in both months, with September at 86% and October decreasing slightly to 84%. For more details, visit Castro weather in October.
September and November present quite different weather patterns. In September, temperatures range from a chilly -1°C (30°F) to a mild 19°C (66°F), with an average temperature of 8°C (47°F). This month experiences considerable precipitation, totaling 135 mm (5.3 in) over 16 days, and humidity levels are high at 86%. In contrast, November showcases warmer temperatures, with a minimum of 2°C (35°F) and a maximum of 24°C (76°F), bringing an average of 12°C (53°F). The precipitation decreases to 107 mm (4.2 in) across 13 days, and humidity also drops slightly to 82%. For more details about November weather, you can check this link: Castro weather in November.
In comparing the weather in September and December, we see a notable shift in temperatures and precipitation. September experiences cooler temperatures, with a minimum of -1°C (30°F) and an average of 8°C (47°F), while December warms up considerably, boasting a minimum of 4°C (40°F) and an average of 14°C (57°F). Precipitation in September is significantly higher at 135 mm (5.3 in) over 16 days compared to December's 69 mm (2.7 in) over just 12 days. Additionally, humidity levels remain relatively similar, with September at 86% and December slightly lower at 84%. For a more detailed look at December weather, you can visit Castro weather in December.
September in Castro marks a noticeable shift from the warmth of summer to the cool embrace of autumn. With humidity levels peaking at a staggering 86%, the atmosphere feels notably damp, laying the groundwork for frequent rain and an increase in precipitation days. Contrary to the typical dry spells of summer, this month witnesses a substantial 135 mm of rain, leading to a lush and vibrant landscape. The average temperature hovers around a cool 8°C, making it significantly chillier than the preceding months. For those planning a visit, understanding this transitional weather can enhance the experience, as Castro's climate is pivotal to its breathtaking beauty. For more details, check out Castro Climate.