Last updated: April 22, 2025
Experience the vibrant September weather of San Fernando de Guaymas, Mexico, where temperatures soar with a maximum of 43°C (110°F), accompanied by an inviting average of 31°C (87°F). As the sun shines down, the evenings cool off to a minimum of 20°C (68°F), providing a perfect respite. Despite the high temperatures, expect about 57 mm (2.3 in) of rainfall spread over 7 days, creating a lush backdrop against the rich, warm landscape. With humidity levels at 76%, the air is a blend of warmth and moisture, making it an ideal time to explore the natural beauty and vibrant culture of this coastal gem.
In September, San Fernando de Guaymas, Mexico, offers a blend of warmth and intensity, as the temperatures reflect the peak of summer's grasp. The month kicks off with a minimum of 20°C (68°F), perfect for early morning activities, while the average heightens to 31°C (87°F), showcasing a comfortable yet warm climate for outdoor adventures. However, as the thermometer climbs to a striking maximum of 43°C (110°F), it’s a reminder of the fierce sun that characterizes this time of year. This significant warmth, coupled with a slight drop in temperatures compared to the sizzling summer months of July and August, indicates a gradual shift towards the milder fall season, where the striking contrasts between the early mornings and midday heat create a captivating atmosphere for residents and visitors alike.
In September, San Fernando de Guaymas experiences a significant surge in precipitation, receiving 57 mm (2.3 in) of rain across seven days, marking the wettest month of the year. This uptick contrasts sharply with the preceding months, which typically see little to no rainfall. The gradual increase starts from just 7 mm in June and swells notably through August, culminating in September's peak. This trend highlights the transition into the rainy season, where the once parched landscape is rejuvenated, providing much-needed hydration before the drier months return in October. The increase in precipitation days also underscores this shift, creating a vivid landscape and a refreshing atmosphere that is characteristic of the region's climatic transition.
September marks a notable shift in humidity levels for San Fernando de Guaymas, with a significant increase to 76%. This uptick follows the more temperate months of summer, where humidity peaks in August at 73% before continuing its ascent into fall. The trend reveals a gradual rise throughout the year, particularly from June onward, when humidity hovers around the lower 50s before spiking in late summer and early autumn. As September wraps up the summer season, residents and visitors alike can expect a muggy atmosphere, signaling the arrival of the wetter months ahead. This consistent pattern suggests that the region remains warm and humid, setting the stage for its unique coastal climate.
In September, San Fernando de Guaymas experiences a UV Index of 11, categorizing it as extreme, which means sun exposure must be approached with caution. This trend continues from the intense summer months; both July and August recorded similarly elevated levels. With a burn time of just 10 minutes, outdoor enthusiasts should ensure adequate sun protection, mirroring the vital precautions taken in the peak of summer. As the year transitions into fall, the UV Index is expected to decrease in October, but September remains a crucial month for sun safety. For more detailed information, visit San Fernando de Guaymas UV Index.
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September in San Fernando de Guaymas, Mexico, offers a delightful blend of summer's warmth and autumn's gentle embrace, with 306 hours of sunshine illuminating the month. This vibrant total reflects a slight dip from the sunniest months, May and April, which bask in the glow of over 360 hours. As the sun begins to recede towards fall, September still holds on to a robust luminosity, outshining the later months of October and November. Overall, the trend reveals a gradual decline in daylight hours, yet the month remains a bright beacon of warmth and vitality, inviting visitors to bask in its lingering sunshine before the cooler days of autumn set in.
As September rolls into San Fernando de Guaymas, travelers can expect a decent probability of sunny weather, with the chance of sunshine standing at 67%. While this marks a slight dip from the preceding summer months, the sun still graces the region more often than not. It's an intriguing transition period; after the peak of August's 55% chance, September serves as a bridge toward the more sun-kissed days of October, which boasts an impressive 90% chance of sunny skies. This trend highlights a typical seasonal shift, making September a charming, albeit slightly less sunny, time to enjoy the coastal beauty before the autumn sun truly shines.
As summer transitions to autumn, September in San Fernando de Guaymas marks a subtle shift in daylight duration, offering approximately 12 hours of sunlight. This month reflects a peak reached in the late spring and summer, where daylight peaked at 13 hours across several months from May to August. Following this, September signals a gradual retreat toward shorter days, leading into October, which sees daylight drop to 11 hours. Overall, this pattern not only highlights the warm climate of the region but also sets a rhythm of longer days that slowly gives way to the gentle embrace of autumn—an ideal time for outdoor exploration under the fading summer sun.
As September arrives in San Fernando de Guaymas, the winds gently whisper through the coastal landscape, with an average wind speed of 2.5 m/s (6 mph). This marks a noticeable dip from the peak breezes felt in the preceding months of June and March, when the winds reach up to 3.6 m/s (8 mph). The overall trend reveals a gradual decrease in wind speed as the year progresses, with the brisk summer winds making way for a calmer autumn atmosphere. While September's breezes may be lighter, they provide a soothing backdrop to the vibrant surroundings, inviting residents and visitors alike to savor the tranquility of this coastal paradise.
The weather in San Fernando de Guaymas 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 San Fernando de Guaymas and find detailed weather information for every month.
September and January present starkly different weather conditions. In September, temperatures soar with a minimum of 20°C (68°F) and an average high of 31°C (87°F), reaching extremes of up to 43°C (110°F). This month also experiences considerable humidity at 76% and significant rainfall, totaling 57 mm (2.3 in) over about 7 days. In contrast, January offers a much cooler climate, with temperatures ranging from a minimum of 6°C (43°F) to a milder average of 17°C (64°F) and a maximum of 30°C (87°F). Precipitation is minimal, with only 12 mm (0.5 in) recorded over just 1 day, and humidity is slightly lower at 71%. For more detailed insights, check out the weather for this month here: San Fernando de Guaymas weather in January.
September and February offer starkly contrasting weather in San Fernando de Guaymas. September boasts warm temperatures, with averages around 31°C (87°F) and peak highs reaching up to 43°C (110°F). The humidity is quite high at 76%, and the month typically sees about 57 mm (2.3 inches) of precipitation over approximately seven days. In contrast, February experiences much cooler temperatures, with an average of 18°C (65°F) and maximums around 33°C (91°F). The month is significantly drier, receiving just 9 mm (0.4 inches) of rain over only one day and lower humidity at 66%. For a detailed look at February's climate, you can visit San Fernando de Guaymas weather in February.
In September, the weather is characterized by significantly higher temperatures, with a minimum of 20°C (68°F) and an average high of 31°C (87°F), occasionally reaching up to 43°C (110°F). The month also experiences substantial humidity at 76% and a total precipitation of 57 mm (2.3 in) over seven days. In contrast, March offers a much cooler and drier climate, with temperatures ranging from a minimum of 9°C (48°F) to a pleasant average of 21°C (69°F), and occasional peaks at 34°C (93°F). Precipitation is notably low in March at just 12 mm (0.5 in) over one day, coupled with a lower humidity level of 58%. For more details on March weather, check out San Fernando de Guaymas weather in March.
The weather in September is marked by higher temperatures, with a minimum of 20°C (68°F) and an average of 31°C (87°F), peaking at a sweltering 43°C (110°F). In contrast, April offers a milder climate, featuring a minimum of 13°C (55°F) and an average of 24°C (76°F), with a maximum temperature reaching 39°C (102°F). Additionally, September experiences notable humidity at 76% along with 57 mm of precipitation over 7 days, while April remains dry, with 0 mm of rainfall and a lower humidity level of 52%. For more detailed information, check out San Fernando de Guaymas weather in April.
The weather in September contrasts significantly with that of May. In September, temperatures range from a minimum of 20°C (68°F) to a scorching maximum of 43°C (110°F), with an average of 31°C (87°F). This month is notably humid, with a humidity level of 76% and experiencing precipitation on 7 days, amounting to 57 mm (2.3 in). In stark comparison, May features milder temperatures, with a minimum of 16°C (61°F) and an average of 27°C (81°F), reaching a maximum of 41°C (106°F). Notably, May is dry, recording no precipitation across the month and having a significantly lower humidity of 51%. For more detailed information, you can check San Fernando de Guaymas weather in May.
In comparing the weather of September and June, both months feature a minimum temperature of 20°C (68°F) and an average of 31°C (87°F). However, September experiences a higher maximum temperature of 43°C (110°F) compared to June's peak of 41°C (106°F). Precipitation levels also differ significantly; September sees 57 mm (2.3 in) of rain over 7 days, while June is notably drier with only 7 mm (0.3 in) and no rainy days at all. Additionally, September's humidity level is considerably higher at 76%, whereas June has a more comfortable humidity of 51%. For a more detailed view on the weather specifics of June, you can visit San Fernando de Guaymas weather in June.
In September, the weather remains quite warm with a minimum temperature of 20°C (68°F) and an average of 31°C (87°F), peaking at a high of 43°C (110°F). This month brings about 57 mm (2.3 in) of precipitation over roughly 7 days, coupled with a higher humidity level of 76%. In contrast, July is slightly hotter on average, with a minimum temperature of 26°C (79°F) and an average high of 32°C (91°F), reaching a maximum of 41°C (107°F). However, July experiences only 18 mm (0.7 in) of precipitation across 4 days, and the humidity is lower at 60%. For more details about July weather, check out San Fernando de Guaymas weather in July.
In comparing the weather of September to August, September features slightly cooler minimum temperatures, averaging 20°C (68°F), while August begins at a higher minimum of 26°C (78°F). The average temperature in September is 31°C (87°F), just a degree less than August's average of 32°C (91°F). Notably, September experiences more rainfall, with 57 mm (2.3 in) of precipitation over 7 days, compared to August's 28 mm (1.1 in) over only 6 days. Humidity also increases in September to 76%, up from August's 73%. For a detailed look at weather conditions specifically in August, you can check San Fernando de Guaymas weather in August.
In September, the weather is characterized by high temperatures, with a minimum of 20°C (68°F) and an average of 31°C (87°F), peaking at a scorching 43°C (110°F). The month also sees significant precipitation, measuring 57 mm (2.3 in) over about seven days, and a humidity level of 76%.
In contrast, October brings a noticeable drop in temperatures, with a minimum of 13°C (56°F) and an average of 28°C (82°F), while the maximum temperature reaches 40°C (104°F). This month is much drier, receiving only 18 mm (0.7 in) of precipitation over just one day, and the humidity slightly decreases to 72%. For more details on what to expect, visit San Fernando de Guaymas weather in October.
In September, the weather is notably warmer, with minimum temperatures around 20°C (68°F) and averaging 31°C (87°F), peaking at a scorching 43°C (110°F). The month sees moderate precipitation, totaling 57 mm (2.3 in) over about 7 days, and humidity levels are relatively high at 76%. In contrast, November experiences a significant drop in temperatures, with minimums of 11°C (51°F) and an average of 23°C (74°F), with maximums reaching 38°C (100°F). Rainfall is much lighter in November, with only 13 mm (0.5 in) over 2 days, and humidity slightly decreases to 72%. For more detailed weather information, you can visit San Fernando de Guaymas weather in November.
In September, the weather is characterized by much warmer temperatures, with minimums around 20°C (68°F) and maximums soaring up to 43°C (110°F). The month experiences significant humidity at 76% and moderate precipitation of 57 mm (2.3 in) over about 7 days. Conversely, December offers a much cooler climate, with temperatures ranging from a minimum of 5°C (42°F) to an average of 18°C (65°F) and highs reaching 31°C (88°F). Precipitation drops to a mere 10 mm (0.4 in) over just 2 days, and humidity is slightly lower at 72%. For a more detailed look at December's weather, you can visit San Fernando de Guaymas weather in December.
As September unfolds in San Fernando de Guaymas, temperatures reach a peak, offering a unique mix of warmth and humidity that sets it apart from other months. While the air is thick with 76% humidity, the average temperature hovers around 31°C, creating a sultry atmosphere that's characteristic of late summer. The month also sees a modest amount of rain, with about 57 mm falling over seven days, signaling the transition towards the wetter season. This combination of high temperatures and increased precipitation not only enhances the region’s lush landscapes but also makes for a distinctly tropical experience. For a deeper dive into what to expect throughout the year, visit San Fernando de Guaymas Climate.