Last updated: April 22, 2025
September in Sonora, Mexico is marked by a warm yet humid climate, with maximum temperatures soaring to 29°C (85°F) and an average of 22°C (72°F). The month experiences considerable precipitation, totaling 314 mm (12.3 in) across 28 days, contributing to the lush landscape of the region. With humidity levels consistently around 87%, the atmosphere can feel quite muggy, making it essential for visitors to stay hydrated and prepared for the frequent showers. Overall, September offers a unique experience of Sonora's climate, blending warmth with the refreshing embrace of rain.
As September arrives in Sonora, Mexico, the temperatures begin to reflect the transformative shift from summer to autumn. With a minimum of 16°C (60°F) and a maximum reaching up to 29°C (85°F), the month maintains a comfortable warmth. The average temperature hovers around 22°C (72°F), similar to the preceding months, yet slightly cooler than the peak summer heat of July and August. This transition offers a pleasant reprieve from the highs of late summer while still providing ample opportunity for outdoor activities. As the days shorten and the warmth lingers, September in Sonora showcases a balance of warmth and comfort, inviting visitors to savor the tail end of the sunny season.
In September, Sonora, Mexico, experiences a significant surge in precipitation, with an impressive 314 mm (12.3 in) of rain falling over 28 days. This marks a continuation of the wet season, following the substantial rain received in August, which saw 227 mm (8.9 in) over a similar number of days. As the region transitions from late summer to early autumn, the increased rainfall not only contributes to the lush landscapes but also showcases a notable uptick compared to the months preceding it. Interestingly, September's rainfall surpasses July and August, reinforcing its role as one of the wettest months of the year, hinting at the climatic patterns that hold sway in this vibrant part of Mexico.
As summer transitions into fall, September in Sonora, Mexico, showcases a notable peak in humidity, reaching 87%—a level consistent with the high moisture experienced in August. This elevated humidity reflects the lingering effects of the summer heat, as the region experiences one of its wettest months. Following the trend of the previous months, September retains a high humidity level, setting the stage for a gradual increase into October, where humidity remains steadily elevated at 88%. The consistency across these months illustrates Sonora's tropical influences, creating a lush environment amid the arid backdrop typical of the region.
In September, Sonora, Mexico experiences a UV Index of 14, maintaining its status as an extreme exposure category, where even brief sun exposure can lead to burns in just 10 minutes. This aligns with the intense sunlight seen throughout the preceding summer months, highlighting a consistent trend of high UV levels from March through September. Following September, the UV Index starts to gradually decrease, offering a bit of relief in October with a drop to 12. However, the ongoing high UV levels during this time underscore the need for sun protection, as the sun's intensity remains formidable. For more details about the UV Index in the region, check out this link: Sonora UV Index.
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As summer gracefully transitions into autumn, September in Sonora, Mexico, continues to bask in an inviting glow, offering 285 hours of sunshine. This month showcases a delightful blend of warmth, as daylight gradually begins to diminish from the peak basking hours of July's 320 hours. While September enjoys a robust amount of sunshine, it marks a slight dip from the vibrant summer months, yet it remains significantly brighter than the earlier winter months. Overall, the trends reveal a region blessed with abundant sunshine throughout the year, making Sonora an ideal escape for sunseekers, even as they embrace the gentler hues of fall.
In Sonora, Mexico, September marks a notable dip in the chances of sunny weather, with only a 17% likelihood of clear skies. As summer sets in, the region experiences an overall decline in sunshine, contrasting sharply with the sunnier months of February and March, which boast chances of 60% and 58%, respectively. The trend illustrates a gradual decrease in sunlight leading into autumn, peaking in the spring months and sharply declining through the summer before a slight bounce back in October at 34%. Those planning outdoor activities in September should be prepared for potentially overcast days and the possibility of rain, as the sun takes a backseat during this time.
As September arrives in Sonora, Mexico, the daylight duration continues to reflect the region's distinct seasonal patterns. With 12 hours of daylight, the month maintains a steady grip on the sunlit hours that peak during the summer months of June and July at 13 hours. Following this vibrant period, daylight gradually tapers off, hinting at the approach of autumn. From the consistent 11 hours in winter to the sun-kissed 13 hours of summer, Sonora experiences a dynamic shift throughout the year, with September marking a harmonious transition back to shorter days. This rhythm not only shapes daily life but also enriches the scenic beauty of the region as the seasons evolve.
In Sonora, Mexico, September marks a subtle shift in wind patterns, with an average wind speed of 1.1 m/s (approximately 3 mph), reflecting a slight decline from the summer months. This dip follows the gentle breezes of July and August, which hovered around 1.5 m/s and 1.3 m/s, respectively. As the region transitions from the heat of summer into the cooler embrace of autumn, the temperate winds contribute to a tranquil atmosphere, perfect for those seeking respite from the sweltering heat. Interestingly, this gradual decrease in wind speed is consistent with the trend observed from June to September, where the winds tend to calm, offering a serene environment as the landscape begins to change, hinting at the approaching fall.
The weather in Sonora changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Sonora and find detailed weather information for every month.
September generally offers warmer temperatures, with an average of 22°C (72°F) and highs reaching up to 29°C (85°F), while January is cooler, boasting an average of 18°C (64°F) and similar maximum temperatures. In terms of precipitation, September experiences significantly higher rainfall at 314 mm (12.3 in) over 28 days, compared to January's 163 mm (6.4 in) across just 13 days. Humidity levels are slightly higher in September, at 87%, compared to 83% in January. For more detailed information, you can check Sonora weather in January.
September and February showcase distinct weather patterns, reflecting the transition between seasons. In September, temperatures range from a mild 16°C (60°F) to a warm 29°C (85°F), with an average of 22°C (72°F). However, this month is characterized by high humidity at 87% and significant precipitation, totaling 314 mm (12.3 in) over 28 days. In contrast, February experiences cooler minimum temperatures of 7°C (46°F) and can go up to a hotter maximum of 31°C (89°F), averaging around 19°C (67°F). Precipitation during this month is notably lower at 90 mm (3.5 in), occurring on just 12 days and accompanied by a more comfortable humidity level of 76%. For more detailed insights, you can check Sonora weather in February.
September and March present distinct weather patterns. In September, temperatures range from a minimum of 16°C (60°F) to a maximum of 29°C (85°F), with an average of 22°C (72°F). This month is notably wet, receiving 314 mm (12.3 in) of precipitation over 28 days, accompanied by high humidity at 87%. In contrast, March experiences a broader temperature range, featuring a minimum of 11°C (51°F), an average of 20°C (69°F), and a maximum of 32°C (90°F). It is much drier, with only 89 mm (3.5 in) of precipitation occurring over just 9 days and lower humidity at 66%. For more detailed information about the weather during this month, check Sonora weather in March.
In September, the weather is characterized by a mild average temperature of 22°C (72°F), with minimums around 16°C (60°F) and maximums reaching up to 29°C (85°F). However, this month is notably wet, receiving a total precipitation of 314 mm (12.3 in) over 28 days, resulting in high humidity levels of 87%. In contrast, April experiences a wider temperature range, with an average still at 22°C (72°F) but minimums dropping to 11°C (52°F) and maximums soaring to 35°C (95°F). Additionally, April's total precipitation is significantly lower at 96 mm (3.8 in) over just 15 days, leading to a drier atmosphere with humidity at 59%. For a deeper look into the conditions during this time, you can check out Sonora weather in April.
When comparing the weather in September and May, notable differences emerge. September typically experiences milder temperatures, with an average of 22°C (72°F) and maximums reaching 29°C (85°F). However, it is much wetter, as evidenced by 314 mm (12.3 in) of precipitation spread over 28 days and high humidity at 87%. In contrast, May presents a warmer climate, featuring an average of 23°C (74°F) and maximum temperatures soaring to 35°C (95°F). The month sees significantly less rainfall, with only 197 mm (7.7 in) across 24 days and lower humidity at 64%. For more insights on May weather, you can check out Sonora weather in May.
When comparing the weather in September and June, several key differences emerge. September features a similar average temperature of around 22°C (72°F), but experiences milder maximum temperatures of 29°C (85°F) compared to June's peak of 33°C (92°F). Both months have a fairly high amount of rainfall, with September receiving 314 mm (12.3 in) and June slightly higher at 340 mm (13.4 in), with precipitation occurring on 28 days in each month. However, September is significantly more humid at 87%, while June has a lower humidity level of 69%. For more details on June weather specifically, you can check this link: Sonora weather in June.
In comparing the weather between September and July, both months showcase similar average temperatures, with September ranging from a minimum of 16°C (60°F) to a maximum of 29°C (85°F), while July has slightly lower minimum temperatures of 14°C (58°F) and a maximum of 30°C (87°F). However, September experiences significantly higher precipitation, totaling 314 mm (12.3 in) over 28 days compared to July's 137 mm (5.4 in) across 21 days. Additionally, September's humidity is a bit higher at 87%, compared to 82% in July, creating a more humid atmosphere as summer transitions into fall. For a deeper dive into July weather specifics, you can check Sonora weather in July.
In comparing the weather between September and August, both months exhibit similar average temperatures, with September averaging 22°C (72°F) and August also at 22°C (72°F). However, September experiences slightly cooler minimum and maximum temperatures, registering a minimum of 16°C (60°F) and a maximum of 29°C (85°F), compared to August's minimum of 15°C (59°F) and maximum of 30°C (86°F). Notably, September sees significantly higher precipitation, with 314 mm (12.3 in) of rainfall over 28 days, compared to August's 227 mm (8.9 in) over 24 days. Despite the similar humidity levels of 87% in both months, September is characterized by a wetter climate, making it a stark contrast to August's drier conditions. For more detailed information on August weather, you can check Sonora weather in August.
September and October showcase a noticeable transition in weather patterns. September experiences a warmer average temperature of 22°C (72°F) with maximums reaching as high as 29°C (85°F), while October sees a slight dip to an average of 21°C (71°F) but can peak at 31°C (88°F). Both months are characterized by high humidity, hovering around 87% in September and slightly increasing to 88% in October. Precipitation levels also rise, with October witnessing 369 mm (14.5 inches) of rainfall over 25 days, compared to September's 314 mm (12.3 inches) over 28 days. For more detailed information, you can visit Sonora weather in October.
September weather is characterized by warmer temperatures, with averages around 22°C (72°F) and a maximum of 29°C (85°F), while November sees cooler conditions, featuring an average of 19°C (67°F) and a minimum of 10°C (50°F). Despite the decrease in temperature, November experiences relatively low precipitation at 252 mm (9.9 in) over 18 days compared to September's higher 314 mm (12.3 in) spread across 28 days. Humidity remains quite high in both months, with September at 87% and November at 88%. For more detailed insights into November's climate, you can explore Sonora weather in November.
September and December present contrasting weather conditions. In September, temperatures range from a minimum of 16°C (60°F) to a maximum of 29°C (85°F), averaging around 22°C (72°F). This month is also characterized by high humidity at 87% and significant precipitation, totaling 314 mm (12.3 in) over 28 days. In contrast, December sees cooler temperatures, with a minimum of 5°C (42°F) and an average of 18°C (65°F), reaching up to 29°C (84°F). Precipitation is considerably lower at 165 mm (6.5 in) and occurs over just 12 days, while humidity remains high at 88%. For more details about December weather, visit Sonora weather in December.
As September unfolds in Sonora, it marks a notable shift from the warmer summer months, bringing a mix of pleasant temperatures and increased precipitation. With an average temperature hovering around 22°C (72°F) and humidity levels soaring to 87%, this month is characterized by frequent rain showers, affecting nearly all days within the month. The significant rainfall, totaling 314 mm (12.3 in), rejuvenates the vibrant landscape, contrasting sharply with the dry heat that defines the summer. For those curious about the annual climate patterns in Sonora, you can explore more at Sonora Climate.