Last updated: April 22, 2025
September in Sonora, Mexico is characterized by warm temperatures and notable humidity, making it a unique month for travelers. The maximum temperature reaches a sweltering 35°C (95°F), while the average temperature settles at a comfortable 25°C (78°F), with nighttime lows hovering around 17°C (62°F). This month experiences significant rainfall, with an average precipitation of 301 mm (11.8 in) spread across 28 days, resulting in a lush landscape. Despite the frequent showers, the high humidity level of 86% adds a tropical feel, enriching the sensory experience of this vibrant region. Whether you're exploring local culture or enjoying the natural beauty, September in Sonora is a month filled with warmth and life.
In September, Sonora, Mexico, experiences warm temperatures as the summer draws to a close. With a minimum of 17°C (62°F) and an average of 25°C (78°F), the region remains comfortably mild. The warmth peaks with a maximum of 35°C (95°F), making it one of the notably hot months, albeit slightly cooler than the peak summer heat. As the month progresses, you can feel a subtle transition towards autumn, with temperatures gradually dipping— a refreshing change after the sweltering summer. This month nicely bridges the hotter early summer months and the cooler autumn days, making it an ideal time for exploring Sonora’s stunning landscapes before the cooler winter sets in.
September marks a peak in precipitation for Sonora, Mexico, with an impressive 301 mm (11.8 in) of rain recorded over 28 days. This substantial increase follows a series of wet months, including August's 250 mm, showcasing a trend of heightened rainfall as the summer transitions into fall. Such remarkable amounts contribute to the region's unique ecosystem, though they also signify the height of the rainy season, which has seen consistent increases in precipitation since the beginning of June. As the landscape absorbs this moisture, September stands out not just for its volume of rain but also for its role in replenishing water resources after the dry months, making it a crucial month for both agriculture and natural habitats in Sonora.
In September, Sonora, Mexico experiences a notable shift in humidity levels, maintaining a relatively high humidity of 86%. This marks a return to the wetter patterns seen in the late summer months, following a slight dip in the previous months. As the year progresses, October and November exhibit even higher humidity, peaking at 90% and 91%, respectively. Overall, the trend reveals that the region tends to have its most humid months during the latter part of the year, with the onset of the rainy season contributing to this rise. Such levels of humidity not only shape the climate but also influence the local ecosystem, showcasing Sonora's unique atmospheric characteristics.
In September, Sonora, Mexico, continues to experience intense solar radiation, with a UV Index of 13, classifying it within the extreme exposure category and resulting in a burn time of just 10 minutes. This trend of high UV levels—previously established in the summer months—persists, reflecting a notable consistency in the region's climatic patterns. As autumn approaches, the UV Index begins to trend downward, but September remains one of the peak months for sun exposure. Residents and visitors should remain vigilant and take necessary precautions to protect their skin during outdoor activities. For more insights on sun safety, visit Sonora UV Index.
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September in Sonora, Mexico, welcomes a delightful blend of warmth and sunshine, with an impressive 289 hours of sunlight. This month, while slightly less radiant than the peak summer months of July and August—which boast 324 and 315 hours respectively—still reflects a consistent pattern of abundant daylight that characterizes the region. As the year transitions into fall, September remains a charming continuation of the vibrant sunlit days experienced since January, where sunshine hours gradually increased from a modest 214 to the late summer peak. This gradual build-up of brightness, peaking in mid-summer before slightly tapering off, perfectly captures the essence of Sonora's inviting climate, making it an ideal time for exploration and outdoor activities.
September in Sonora, Mexico, tends to show a notable dip in the likelihood of sunny weather, with a mere 19% chance of sunshine. This marks a significant decline from the higher probabilities observed in the spring months, where sunshine chances linger around the 51% mark in March and hover close to 47% in April. As the summer progresses, the chances for sun fluctuate but remain relatively low, only bouncing back to 29% in October. This trend highlights September as a transitional month, where the lingering effects of summer heat meet the onset of the wetter autumn season, making it less favorable for sun-seekers.
As September unfolds in Sonora, Mexico, residents enjoy 12 hours of daylight, marking a gentle transition from the vibrant summer months. This period aligns closely with August, where daylight peaked at the same duration, following a gradual increase from 11 hours in the earlier winter months. The longer days from May through July, with their maximum of 13 hours, begin to taper off, creating a comforting balance as autumn approaches. By the time October arrives, daylight will once again shorten to 11 hours, hinting at the shifting seasons ahead. Overall, September serves as a delightful bridge, maintaining ample daylight while signaling the onset of cooler days.
In September, the winds in Sonora, Mexico settle into a gentle rhythm, maintaining an average speed of 1.2 m/s (about 3 mph). This slight drop continues a trend seen throughout the summer months, where wind speeds have generally hovered around this mark since June. The calmer breezes of early fall contrast with the seasonal peak in January, when gusts are slightly stronger at 1.4 m/s. As September transitions into October, the wind remains consistently mild, suggesting a serene atmosphere perfect for enjoying the local landscapes. Overall, this period of subdued wind offers a peaceful respite, ideal for outdoor activities and a deeper connection with Sonora's natural beauty.
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 weather is marked by warmer temperatures, with an average of 25°C (78°F) and peak highs reaching up to 35°C (95°F). This month also sees significant rainfall, with a total of 301 mm (11.8 in) spread over 28 days, contributing to a high humidity level of 86%. In contrast, January experiences cooler temperatures, with an average of 20°C (67°F) and maximums of 33°C (91°F). Precipitation drops significantly to just 47 mm (1.9 in) over 9 days, and the humidity remains slightly elevated at 88%. For a more detailed look at January weather, you can explore Sonora weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 35°C (95°F), with an average of 25°C (78°F). This month experiences significant rainfall, totaling 301 mm (11.8 in) over 28 days, leading to high humidity levels of 86%. In contrast, February offers milder temperatures, with a minimum of 9°C (48°F), an average of 21°C (70°F), and a maximum reaching 36°C (98°F). Precipitation is drastically reduced in February, with only 49 mm (1.9 in) over just 9 days, maintaining the same humidity level of 86%. For a detailed comparison, you can refer to Sonora weather in February.
In comparing the weather in September and March, September tends to be much wetter and more humid. With average temperatures ranging from a minimum of 17°C (62°F) to a maximum of 35°C (95°F), September sees significant precipitation of 301 mm (11.8 in) spread over 28 days, resulting in humidity levels of 86%. In contrast, March offers a drier and warmer climate, with temperatures ranging from a minimum of 11°C (53°F) to a maximum of 37°C (98°F). This month experiences just 66 mm (2.6 in) of rain over 9 days, contributing to slightly lower humidity at 84%. For a more detailed look at March weather, you can refer to Sonora weather in March.
September and April exhibit distinct weather patterns, with September typically showcasing warmer temperatures and higher humidity. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 35°C (95°F), coupled with high humidity at 86%. This month also experiences significant rainfall, with 301 mm (11.8 in) of precipitation over 28 days. In contrast, April offers slightly cooler temperatures with a minimum of 13°C (55°F) and a maximum soaring to 40°C (104°F), while maintaining a comfortable average of 25°C (77°F). The precipitation in April is considerably lower, at 63 mm (2.5 in) over just 9 days, and with humidity at 81%. For further details on April weather, you can visit Sonora weather in April.
In September, the weather tends to be quite humid with an average temperature of 25°C (78°F), ranging from a minimum of 17°C (62°F) to a maximum of 35°C (95°F). The month is characterized by significant rainfall, receiving around 301 mm (11.8 in) over 28 days. In contrast, May boasts slightly higher average temperatures at 27°C (80°F), with maximums reaching up to 37°C (100°F). It experiences less precipitation, totaling 119 mm (4.7 in) across only 15 days, and has a lower humidity level at 82%. For more details about the weather in May, you can check Sonora weather in May.
September and June exhibit relatively similar weather patterns, yet they also have distinct differences. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 35°C (95°F), averaging around 25°C (78°F). The month is characterized by significant rainfall, with 301 mm (11.8 in) of precipitation spread over 28 days, leading to a higher humidity level of 86%. In contrast, June offers slightly warmer temperatures, with a minimum of 18°C (65°F) and a maximum of 36°C (96°F), averaging 26°C (79°F). Rainfall is somewhat less, totaling 269 mm (10.6 in) over 26 days, contributing to a lower humidity level of 81%. For more detailed information, you can check Sonora weather in June.
In comparing September and July weather, it's evident that both months experience similar minimum and average temperatures, with September slightly warmer at a maximum of 35°C (95°F) compared to July's 33°C (92°F). September also sees notably higher precipitation, with 301 mm (11.8 in) over 28 days, while July has a more moderate 180 mm (7.1 in) over 23 days. Additionally, September is more humid, averaging 86% compared to July's 81%, making the latter feel a bit more comfortable despite the higher heat. For those interested in detailed information about July weather, you can visit Sonora weather in July.
In comparing the weather of September and August, we see a slight increase in temperature during September, with morning lows averaging 17°C (62°F) and maximum temperatures reaching up to 35°C (95°F), compared to August's high of 33°C (92°F). While the average temperature remains comparable, September is notably wetter, receiving 301 mm (11.8 in) of precipitation over 28 days, compared to August's 250 mm (9.8 in). Furthermore, humidity levels rise slightly in September, averaging 86% compared to 82% in August. For more detailed insights about August weather, you can visit Sonora weather in August.
In comparing the weather between September and October, September tends to be warmer, featuring a minimum temperature of 17°C (62°F) and an average of 25°C (78°F), peaking at 35°C (95°F). This month also experiences significant rainfall, with a total precipitation of 301 mm (11.8 in) over 28 days, contributing to a high humidity level of 86%. In contrast, October sees a slight dip in temperatures, with a minimum of 15°C (60°F) and an average of 24°C (76°F), reaching a maximum of 33°C (93°F). The precipitation decreases to 224 mm (8.8 in) across 21 days, with humidity rising modestly to 90%. For more detailed insights into October conditions, you can check Sonora weather in October.
In September, the weather is characterized by warmer temperatures, with a minimum of 17°C (62°F) and an average max of 35°C (95°F), making it the heat of the late summer. The month also experiences significant rainfall, with 301 mm (11.8 in) spread over 28 days and humidity levels reaching 86%. In contrast, November brings cooler temperatures, with a minimum of 10°C (50°F), an average of 22°C (71°F), and a maximum of 33°C (92°F). Rainfall decreases substantially to 114 mm (4.5 in) over 17 days, and humidity rises slightly to 91%. For more details on what to expect, check out Sonora weather in November.
In September, the weather tends to be significantly warmer, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 35°C (95°F) and an average of 25°C (78°F). This month sees considerable rainfall, with a total of 301 mm (11.8 in) spread over 28 days, resulting in high humidity levels of 86%. In contrast, December presents a much cooler climate, featuring temperatures that range from a low of 6°C (43°F) to a high of 32°C (90°F), with an average of 20°C (68°F). Rainfall is considerably less in December, totaling only 45 mm (1.8 in) over 9 days, while humidity increases slightly to 91%. For more detailed information on December's climate, you can visit Sonora weather in December.
As September arrives in Sonora, the weather transitions to a distinctly more humid phase, characterized by increased rainfall and notably warm temperatures. With average highs of around 25°C and a minimum of 17°C, the month stands out due to its frequent precipitation—recording rain almost every day. This marks a shift from drier months, creating a lush backdrop for the region. The humidity levels soar to 86%, making the air feel even warmer and contributing to a vibrant, tropical atmosphere unlike any other time of the year. For a deeper dive into the unique weather patterns throughout the year, visit Sonora Climate.