September Weather in San Miguel, Mexico

Last updated: April 22, 2025

September in San Miguel, Mexico, brings a warm yet humid atmosphere, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 29°C (85°F). The month averages around 20°C (69°F), providing a pleasant climate for both residents and visitors. However, be prepared for significant rainfall, as September sees a substantial precipitation total of 418 mm (16.5 in) across 29 days. The humidity lingers at a notable 82%, making the air feel even more tropical. Whether you're wandering through the picturesque streets or enjoying local festivities, be ready for a month where the rain is as prevalent as the vibrant culture.

September Temperature in San Miguel

In San Miguel, Mexico, September ushers in a mild ambiance with temperatures that are remarkably consistent, mirroring the summer's warm embrace. With minimums around 15°C (59°F) and maximums peaking at 29°C (85°F), the average temperature settles comfortably at 20°C (69°F). This slight dip from the sizzling summer months signals a transition into the cooler fall season, yet the warmth remains a pleasant companion for visitors. The trends show a gradual cooling from the highs of March and April, but September retains a delightful warmth, perfect for outdoor exploration and enjoying the vibrant local culture. As the rain showers of the late summer recede, this month offers a harmonious blend of comfortable temperatures and refreshing breezes—ideal for experiencing the charm of San Miguel.

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.
JanFebMarAprMayJunJulAugSepOctNovDec656770717269696968696765
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 in San Miguel, Mexico, marks a notable peak in the region's rainy season, with precipitation amounting to 418 mm (16.5 in) recorded over 29 rainy days. This trend continues the heavy rainfall seen throughout the summer, particularly after the record-breaking highs of August, which alone brought in 469 mm (18.5 in). The pattern indicates a consistent buildup of moisture in the atmosphere, resulting in nearly a month of persistent rain that often supports the vibrant greenery and lush landscapes of the area. As summer transitions into fall, the decrease in rainfall begins to take shape in October, signaling the end of the wet season and a gradual return to drier days ahead.

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.
JanFebMarAprMayJunJulAugSepOctNovDec1147231163543394694182325415
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 peak in humidity at 82%, mirroring the high levels of August. This late-summer humidity can create a lush atmosphere, contributing to the vibrant landscapes of the region. Following a steady rise from 61% in February to August's highs, September maintains this tropical feel before the gradual drop begins in October, when humidity levels decline to 79%. The marked increase from earlier months indicates a shift into the rainy season, enhancing the town’s charm but also reminding residents and visitors to embrace the refreshing, albeit humid, embrace of this beautiful time of year.

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.
JanFebMarAprMayJunJulAugSepOctNovDec65%61%59%62%73%78%79%82%82%79%72%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Miguel

September in San Miguel, Mexico, marks a continuation of the intense UV Index experienced throughout the summer months. With a UV Index of 14, categorized as extreme, residents and visitors should remain vigilant, as the burn time is just 10 minutes. This high level of UV radiation is a trend that starts in March and persists through September, emphasizing the importance of sun protection during these months. As we transition into October, the UV Index dips to 12, but the need for caution remains. For further insights and updates on UV levels, check out 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.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141414141412109
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, September in San Miguel heralds a gentle transition, offering 248 hours of sunshine. While this is a notable dip from the sun-drenched days of July and August, it still stands above the winter months that promise fewer rays. The month sees a softening of the summer heat, making way for the vibrant hues of autumn. Interestingly, September's sunshine paves the way for the year’s final stretch, where sunlight hours gradually rise again with October's 271 hours. This delightful balance invites visitors to explore the picturesque streets and enjoy the festive ambiance, all while basking in the waning warmth of the 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.
JanFebMarAprMayJunJulAugSepOctNovDec239h278h320h319h314h255h291h271h248h271h289h294h
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

In September, San Miguel experiences a notably low chance of sunny weather, with only a 6% likelihood of clear skies, a stark contrast to the sunnier months that precede it. After a brief peak in February at 80%, sun chances steadily decline, hitting their lowest point mid-year during the summer months. As September rolls in, the sun has seemingly taken a vacation, closely mirroring the trends of June and August, which also showcase dismal sunshine probabilities. However, as the month transitions into October, there emerges a glimmer of hope with a 16% chance of sunlight, hinting at a gradual return of clearer days leading into fall. Overall, if you're seeking sun in September, be prepared for overcast skies and pack an umbrella!

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.
JanFebMarAprMayJunJulAugSepOctNovDec47%80%69%71%41%6%14%8%6%16%45%64%
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

In San Miguel, Mexico, the month of September brings a delightful balance of daylight, with approximately 12 hours of sunshine shimmering each day. This month marks a smooth transition from the summer months, where daylight peaked at 13 hours in June and July, gradually tapering off as autumn approaches. The steady 12 hours in September is consistent with the longer days seen in the late spring and early summer, emphasizing the region's gentle shift toward shorter daylight hours as the year draws to a close. As the days grow gradually shorter, September offers a perfect blend of warmth and light, inviting outdoor exploration and vibrant community activities before the shorter autumn days settle in.

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 12m11h 34m12h 3m12h 32m12h 56m13h 8m13h 2m12h 40m12h 12m11h 42m11h 17m11h 5m
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 rolls in, the gentle breezes of San Miguel bring a calming presence, with average wind speeds dipping to 1.2 m/s (3 mph). This marks a subtle decline from the slightly breezier spring and early summer months, which often see winds reaching up to 2.1 m/s (5 mph) in April. Compared to the preceding months, September's soft winds create an inviting atmosphere perfect for leisurely outdoor strolls and vibrant local festivities. The trend of gradually decreasing wind speeds continues through October and November, suggesting a serene transition into the fall season, where San Miguel's charm truly shines under the warm, embracing sun.

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.
JanFebMarAprMayJunJulAugSepOctNovDec1.51.81.82.11.71.21.31.31.2 m/s1.21.31.3
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.

September and January present contrasting weather patterns. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 29°C (85°F), with an average temperature of 20°C (69°F). This month is characterized by high humidity at 82% and significant rainfall, with precipitation measuring 418 mm (16.5 in) over 29 days. In contrast, January features milder weather, with a minimum of 9°C (48°F) and the same maximum of 29°C (85°F), but an average temperature of 19°C (66°F). This cooler month experiences minimal rainfall of just 11 mm (0.4 in) over only 1 day, and lower humidity at 65%. For more detailed insights about January weather, check out San Miguel weather in January.

When comparing the weather in September and February, notable differences emerge. September boasts a warmer average temperature of 20°C (69°F) but experiences higher extremes, with maximums reaching up to 29°C (85°F). However, it is also the wettest month, with 418 mm (16.5 in) of precipitation over 29 days and high humidity at 82%. In contrast, February has a cooler minimum temperature of 8°C (47°F) and peaks at 31°C (88°F) with a much more comfortable average of 20°C (67°F). This month is significantly drier, with just 4 mm (0.1 in) of rain over only one day and a lower humidity level of 61%. For those interested in more detailed weather specifics, check out San Miguel weather in February.

In comparing the weather of September and March, there are notable differences in temperature and precipitation. September typically experiences a milder temperature range, with minimums around 15°C (59°F) and maximums reaching 29°C (85°F), while March can get quite warm, with maximum temperatures peaking at 33°C (91°F) and a lower minimum of 10°C (51°F). Additionally, September is characterized by high humidity at 82%, combined with significant rainfall totaling 418 mm (16.5 in) over 29 days. In contrast, March enjoys much drier conditions, with only 7 mm (0.3 in) of precipitation over just 2 days and a more comfortable humidity level of 59%. For a detailed overview of the climate during this month, you can refer to San Miguel weather in March.

When comparing the weather in September and April, notable contrasts emerge. September experiences a relatively mild average temperature of 20°C (69°F) but is marked by significantly higher humidity at 82% and extensive precipitation, totaling 418 mm (16.5 in) over 29 days. In contrast, April boasts warmer days with a higher maximum temperature of 34°C (94°F) while enjoying much lower rainfall, around 23 mm (0.9 in) over just 4 days, and a reduced humidity level of 62%. This makes April a drier and sunnier month compared to the often rainy and humid September. For more details, check out San Miguel weather in April.

When comparing the weather in September and May, notable differences emerge. September experiences a slightly warmer average temperature of 20°C (69°F) compared to May's average of 22°C (72°F), with peak highs reaching up to 29°C (85°F) and 33°C (91°F), respectively. However, September also faces significantly more rainfall, accumulating 418 mm (16.5 in) over 29 days, while May sees only 116 mm (4.6 in) over 17 days. Additionally, humidity levels are higher in September at 82%, versus 73% in May, contributing to a more stifling atmosphere. For further details on May weather, you can visit San Miguel weather in May.

In comparing the weather conditions of September and June, both months display a similar temperature range, with minimums starting at 15°C (59°F) and maximums reaching close to 30°C (87°F). However, September tends to be slightly cooler with an average temperature of 20°C (69°F) compared to June's warmer average of 21°C (69°F). Precipitation levels are notably higher in September, with 418 mm (16.5 in) falling over 29 days, compared to June's 354 mm (13.9 in) over 28 days. The humidity also rises in September, averaging 82%, which is a bit higher than June's 78%. For more detailed information on June weather, you can check San Miguel weather in June.

In comparing the weather between September and July, both months exhibit similar temperature ranges, with July averaging 21°C (69°F) and September slightly cooler at 20°C (69°F). However, September is characterized by significantly higher precipitation, receiving 418 mm (16.5 in) over 29 days compared to July's 339 mm (13.3 in) over 28 days. Additionally, September tends to be a bit more humid, with humidity levels reaching 82% versus July's 79%. For more detailed information on July's weather, you can visit San Miguel weather in July.

In comparing the weather of September to August, both months display similar temperature ranges, with minimums at 15°C (59°F), average temperatures around 20°C (69°F), and maximums peaking at 29°C (85°F) in September and 29°C (84°F) in August. However, September experiences slightly less precipitation, totaling 418 mm (16.5 in) over 29 rainy days, compared to August's 469 mm (18.5 in) across 30 days. Both months maintain a consistent humidity level of 82%. For more detailed information, you can check San Miguel weather in August.

September and October exhibit similar average temperatures, but differing weather patterns mark the transition between the two months. In September, the minimum temperature hovers at 15°C (59°F), with a maximum of 29°C (85°F) and an average of 20°C (69°F). This month experiences significantly higher precipitation, totaling 418 mm (16.5 in) over 29 days, contributing to a humidity level of 82%. In contrast, October sees slightly cooler nights with a minimum temperature of 13°C (56°F) and maintains a similar maximum of 29°C (84°F), while the average temperature remains unchanged at 20°C (69°F). However, precipitation drops substantially to 232 mm (9.1 in) spread over 25 days, resulting in lower humidity at 79%. For a detailed view of the weather specifics in October, you can refer to San Miguel weather in October.

September and November exhibit notable differences in weather patterns despite having similar average temperatures. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 29°C (85°F), accompanied by high humidity levels at 82%. The month is characterized by significant rainfall, with a total precipitation of 418 mm (16.5 in) spread across 29 days, creating a damp atmosphere. In contrast, November sees slightly cooler temperatures, with a minimum of 11°C (52°F) and the same maximum of 29°C (85°F), but experiences drastically less precipitation, totaling only 54 mm (2.1 in) over just 8 days. The humidity also drops to 72%, making November feel drier and more comfortable. For a detailed look at November's weather, you can check San Miguel weather in November.

In September, the weather is marked by warm temperatures, with an average of 20°C (69°F) and a maximum reaching up to 29°C (85°F). However, the month is quite wet, experiencing a significant 418 mm (16.5 in) of precipitation over 29 days and high humidity levels at 82%. In contrast, December features cooler temperatures, with an average of 19°C (66°F) and a minimum of 7°C (46°F), while still maintaining a maximum of 29°C (85°F). Notably, December is much drier, with only 15 mm (0.6 in) of precipitation spread over just 3 days and lower humidity at 70%. For more insights on the December climate, 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, the weather characteristically shifts, welcoming the heart of the rainy season. The high humidity and frequent precipitation transform the landscape, bringing vibrant greenery and a fresh ambiance. While temperatures remain warm, with averages hovering comfortably around 20°C, the increased rainfall often makes this month feel cooler compared to the drier summer months. With nearly every day graced by some rainfall, September stands out as a time when nature comes alive, creating a unique and refreshing atmosphere that captivates residents and visitors alike. For a deeper insight into the climate nuances throughout the year, explore San Miguel Climate.