September Weather in San Miguel, Mexico

Last updated: April 22, 2025

September in San Miguel, Mexico brings a mix of vibrant warmth and refreshing rainfall. With daily maximum temperatures reaching up to 31°C (88°F) and an average of 19°C (67°F), the days can feel pleasantly warm. However, nighttime temperatures can drop to a cool 10°C (50°F), inviting cozy evenings. The month is characterized by 122 mm (4.8 in) of precipitation over 17 days, contributing to the region's lush landscapes. High humidity levels averaging 81% enhance the tropical feel, making this a unique time to experience the beauty and charm of San Miguel as the transition into fall begins.

September Temperature in San Miguel

In September, San Miguel, Mexico, experiences a gentle transition towards cooler temperatures, characterized by a minimum of 10°C (50°F) and an average of 19°C (67°F). As summer wanes, the maximum temperature hovers around 31°C (88°F), offering a pleasant balance for both locals and visitors. This month generally marks a slight dip from the more intense heat of August, while still retaining enough warmth to enjoy outdoor activities. Unlike the chillier winter months ahead, September's mild climate encourages exploration of the town's vibrant culture and picturesque surroundings, making it an inviting time to experience all that San Miguel has to offer.

September Weather in San Miguel: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Miguel, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec586367717370686967656159
Data source: Temperature data for San Miguel generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in San Miguel

September marks a significant peak in precipitation for San Miguel, Mexico, with 122 mm (4.8 in) of rain falling over 17 days. This notable surge in rainfall follows the rhythm of the wet season, where June and July also see high totals, but September experiences a brief resurgence. The month not only brings the highest precipitation, but it also transitions the city into a quieter, cooler climate, as the summer heat begins to wane. With rain becoming more frequent, the lush landscapes flourish, showcasing the beauty of natural renewal in this vibrant region. Overall, September stands out as a pivotal moment in the annual cycle, heralding both the bounty and the challenges of the rainy season.

September Precipitation Trends in San Miguel

The chart displays monthly precipitation patterns in San Miguel, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec67141745126867812258206
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Miguel

In September, San Miguel experiences a notable rise in humidity, with levels reaching 81%. This increase is part of a broader trend observed as the months transition from summer to fall. The humidity starts to climb significantly from the middle of the year, peaking in October at 83% and maintaining a high level through November. Comparatively, the months preceding September show lower humidity, with figures consistently trailing in the 58% to 76% range. The heightened moisture in the air during September not only contributes to a muggy atmosphere but also heralds the approaching rainy season, creating a lush backdrop for the vibrant landscapes of San Miguel. As the year progresses towards the winter months, humidity levels gradually stabilize, maintaining a generally high moisture content that characterizes the region's climate.

September Average Humidity in San Miguel

This chart illustrates the average monthly humidity levels in San Miguel, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec74%65%58%58%67%76%67%68%81%83%84%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Miguel

In September, San Miguel experiences a UV Index of 14, placing it firmly in the extreme exposure category, with a rapid burn time of just 10 minutes. This trend of high UV levels persists throughout the summer months and continues into early fall, with similar indices recorded from May through August. As we transition into October, there's a slight dip to an index of 12, but the remains high levels serve as a reminder to prioritize sun safety during this time. With consistently extreme UV exposure, it's essential for residents and visitors alike to stay protected. For more insights on UV levels throughout the year, visit San Miguel UV Index.

Maximum UV Index Levels in San Miguel for September

The chart shows the monthly maximum UV Index (UVI) for San Miguel in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec9111414151414141412108
Data source: San Miguel September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in San Miguel

As summer fades into autumn, September in San Miguel, Mexico, offers a delightful embrace of sunshine, with an impressive 275 hours of bright light. Throughout the year, a clear upward trend in sun exposure peaks in May, boasting 332 hours, before gently tapering off toward the end of the year. September, while a slight dip from the peak of summer, still basks in ample sunlight, showcasing the region's consistent charm. As the days grow shorter and temperatures cool, San Miguel radiates a warm glow, inviting residents and visitors alike to savor its enchanting beauty under the brilliant September sun.

Monthly Sunshine Duration in San Miguel: September Highlighted

The September sunshine duration represents the total number of hours San Miguel experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec224h263h309h316h332h301h313h307h275h272h265h279h
Data source: San Miguel September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Miguel During September

As summer transitions to fall in San Miguel, September sees a notable dip in sunny weather, with only a 14% chance of sun. This sharply contrasts the previous months, where sunshine was more prevalent; for instance, February boasts an impressive 83% likelihood. The trend shows a gradual decline in sunny days from spring into summer, culminating in September's relatively gloomy forecast. After the vibrant summer months, this low chance of sun not only reflects the rainy season's influence but also serves as a gentle reminder to embrace the unique charm of San Miguel’s softer, cloudier days.

Percentage of Sunny Days in September in San Miguel

The chart illustrates the percentage of sunny days in San Miguel throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often San Miguel experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec54%83%72%61%51%16%23%33%15%35%46%67%
Data source: San Miguel September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Miguel in September

As September arrives in San Miguel, daylight continues its steady decline from the peak summer months, offering about 12 hours of daylight. This mirrors August's daylight duration, signaling a transition as the days gradually shorten after the sunniest months of May through July, which boast 13 hours. The early part of the year sees a consistent 11 hours of daylight in January and February, with a slow increase as spring unfolds. By the time September rolls around, it’s clear that the vibrant days of summer are giving way to cozy autumn evenings, hinting at the impending shorter days of fall and winter.

Average Daylight Hours in San Miguel for September

The chart illustrates the variation in daylight duration in San Miguel throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 1m11h 27m12h 2m12h 37m13h 6m13h 21m13h 13m12h 47m12h 13m11h 38m11h 8m10h 53m
Data source: San Miguel daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in San Miguel

As September unfolds in San Miguel, the gentle whispers of the wind reflect a subtle shift in the seasonal rhythm. The average wind speed dips to 1.9 m/s (4 mph), marking it as one of the calmest months of the year. This decrease from the breezier summer months invites a serene ambiance, perfect for leisurely strolls through the vibrant streets. As the winds tend to lighten towards both ends of the year, with December sharing the same tranquil pace, September offers a refreshing yet mellow contrast to the slightly brisker spring and summer months, inviting both residents and visitors to savor the idyllic tranquility of San Miguel.

Average September Wind Speed in San Miguel

The chart displays monthly wind speed patterns in San Miguel, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.12.72.72.62.62.32.22.61.9 m/s2.22.21.9
Data source: San Miguel September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in San Miguel Compares to Other Months

The weather in San Miguel 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 Miguel and find detailed weather information for every month.

In September, the weather is significantly warmer and more humid, with average temperatures ranging from a minimum of 10°C (50°F) to a maximum of 31°C (88°F). The month also experiences substantial rainfall, with about 122 mm (4.8 in) over 17 days, resulting in an average humidity level of 81%. In contrast, January brings cooler temperatures, with an average ranging from a minimum of 1°C (34°F) to a maximum of 29°C (85°F), making it a more comfortable time for outdoor activities. The precipitation drops drastically in January to just 6 mm (0.2 in) over 1 day, and humidity levels are lower at 74%. For more detailed information about January weather, visit San Miguel weather in January.

In comparing the weather between September and February, notable differences emerge. September typically features a broader range of temperatures, with minimums around 10°C (50°F), averages at 19°C (67°F), and maximums peaking at 31°C (88°F). It is also characterized by higher humidity levels at 81%, considerable rainfall totaling 122 mm (4.8 in) over about 17 days. In contrast, February presents a milder climate with a minimum temperature of 2°C (36°F) and an average of 17°C (63°F), reaching up to 32°C (91°F) on its warmest days. The month boasts significantly lower precipitation at just 7 mm (0.3 in) over 2 days and a reduced humidity of 65%. For a deeper look into February's climate, you can check San Miguel weather in February.

September and March present contrasting weather experiences. September features a more humid environment with average temperatures around 19°C (67°F) and significant precipitation, totaling 122 mm (4.8 in) over 17 days. This creates a lush landscape but can lead to frequent rain interruptions. In stark contrast, March boasts a similar average temperature of 19°C (67°F), but with a lower maximum of 34°C (94°F). The month experiences minimal rainfall, with only 14 mm (0.6 in) spread over just 2 days, resulting in a much drier atmosphere and lower humidity levels at 58%. For those interested in more details, check out San Miguel weather in March.

When comparing the weather in September to that of April, notable differences emerge. September experiences a broader temperature range, with minimums around 10°C (50°F) and maximums reaching up to 31°C (88°F). In contrast, April boasts slightly cooler nightly lows at 7°C (45°F), yet offers warmer daytime highs peaking at 35°C (95°F). The precipitation in September is significantly higher, with 122 mm (4.8 in) distributed over 17 days, while April is much drier, receiving just 17 mm (0.7 in) over only 4 days. Additionally, September's humidity is elevated at 81%, compared to April's lower 58%. Overall, April tends to be sunnier and warmer, making it a more favorable month for outdoor activities. For more specifics, check out the detailed weather insights for San Miguel weather in April.

When comparing the weather in September and May, notable differences emerge. September tends to be cooler with an average temperature of 19°C (67°F) and a maximum of 31°C (88°F), while May is warmer, averaging 23°C (73°F) and reaching highs of 35°C (96°F). In terms of precipitation, September experiences significantly more rain, recording 122 mm (4.8 in) over 17 days, compared to May's lighter rainfall of 45 mm (1.8 in) over just 10 days. Additionally, the humidity level in September is higher at 81%, while May boasts a more comfortable 67% humidity. For more detailed insights into May's weather, you can visit San Miguel weather in May.

When comparing the weather in September and June, both months offer a mix of warmth and precipitation, but with some key differences. September experiences temperatures ranging from a minimum of 10°C (50°F) to a maximum of 31°C (88°F), averaging around 19°C (67°F), while June is slightly warmer, with temperatures ranging from 11°C (52°F) to a peak of 34°C (94°F) and an average of 21°C (70°F). In terms of rainfall, September sees about 122 mm (4.8 in) over 17 days, whereas June has a similar amount of precipitation at 126 mm (5.0 in) over 15 days. Moreover, humidity levels are higher in September at 81%, compared to 76% in June, making September feel a bit more muggy. For a detailed look at the weather specifics, check out San Miguel weather in June.

In comparing the weather of September and July, we see notable differences in temperature and precipitation. September typically features a greater temperature range with minimums around 10°C (50°F) and maximums reaching up to 31°C (88°F), while July maintains slightly warmer temperatures, with minimums at 13°C (56°F) and maximums peaking at 32°C (90°F). In terms of precipitation, September receives significantly more rainfall, averaging 122 mm (4.8 in) over 17 days, compared to July's 86 mm (3.4 in) spread over 14 days. Additionally, September tends to be more humid, with an average humidity of 81%, compared to July's 67%. For a closer look at July's climate, check out San Miguel weather in July.

When comparing the weather in September to that of August, September tends to be slightly cooler, with average temperatures ranging from a minimum of 10°C (50°F) to a maximum of 31°C (88°F), compared to August's minimum of 12°C (55°F) and maximum of 32°C (91°F). Additionally, September experiences more rainfall, with a total of 122 mm (4.8 in) spread over 17 days, while August sees only 78 mm (3.1 in) over 13 days. The humidity in September is higher at 81%, compared to August's 68%, making it feel more muggy in the former. For a more detailed look at August weather, you can visit San Miguel weather in August.

In comparing the weather of September and October, we observe a noticeable transition as summer gives way to autumn. September features a wider temperature range with minimums of 10°C (50°F) and maximums reaching up to 31°C (88°F), coupled with substantial precipitation of 122 mm (4.8 in) over 17 days. In contrast, October sees slightly cooler temperatures, with minimums dropping to 6°C (43°F) and maximums averaging around 30°C (86°F), while precipitation significantly decreases to 57 mm (2.3 in) over just 10 days. Interestingly, humidity remains relatively high, at 81% in September and slightly increasing to 83% in October. For more details on October's weather, you can check San Miguel weather in October.

In comparing the weather of September to November, we notice a significant shift in temperature and precipitation. September features a wider temperature range with a minimum of 10°C (50°F) and a maximum of 31°C (88°F), leading to a warm average of 19°C (67°F). The month is notably wet, with total rainfall of 122 mm (4.8 in) over 17 days, and humidity levels are high at 81%. In contrast, November experiences much cooler temperatures, with a minimum of 0°C (33°F) and a slightly lower average of 16°C (61°F), though the maximum can still reach 30°C (86°F). Precipitation drops significantly to just 20 mm (0.8 in) over only 2 days, and humidity remains slightly elevated at 84%. For a more detailed look at the November weather specifics, you can check San Miguel weather in November.

In September, temperatures are generally warm, ranging from a minimum of 10°C (50°F) to a maximum of 31°C (88°F), with an average of 19°C (67°F). This month experiences considerable precipitation, with 122 mm (4.8 in) falling over approximately 17 days, while humidity remains high at 81%.

In contrast, December brings cooler temperatures with a minimum of -1°C (31°F) and a maximum of 29°C (84°F), averaging 15°C (59°F). The month is markedly drier, with only 6 mm (0.2 in) of precipitation over just 1 day, yet humidity remains consistent at 81%. Overall, September showcases a much more humid and wetter climate compared to the crisp and relatively dry December. For more details on December weather, visit San Miguel weather in December.

Compare San Miguel's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in San Miguel

As September unfolds in San Miguel, it brings with it a unique blend of warmth and humidity, marking a departure from the drier months that precede it. With temperatures peaking at 31°C and a noticeable increase in rainfall, this month sets the stage for lush greenery and vibrant landscapes. The air carries a rich humidity of 81%, offering a refreshing contrast to the hotter summer days, while the frequent showers add a touch of charm to the city's ambiance. If you're curious about how the climate in San Miguel evolves throughout the year, be sure to explore more in our detailed look at San Miguel Climate.