September Weather in San Carlos, Mexico

Last updated: April 22, 2025

In September, San Carlos, Mexico experiences a dynamic climate characterized by high temperatures and significant humidity. The maximum daily temperature can reach an impressive 38°C (101°F), while the average settles around a comfortable 28°C (83°F). Evenings cool down to a mild 22°C (72°F), making it pleasant after a hot day. This month also sees considerable precipitation, totaling 209 mm (8.2 in) over 23 days, contributing to the region's lush landscapes. With an average humidity level of 87%, visitors can expect a tropical feel, making September both an invigorating and challenging time for outdoor activities in San Carlos.

September Temperature in San Carlos

In September, San Carlos, Mexico welcomes a warm, tropical climate that makes it an inviting destination. With minimum temperatures hovering around 22°C (72°F) and peak readings reaching up to 38°C (101°F), the weather maintains a delightful balance, ensuring that days are sun-kissed but not oppressive. The average temperature of 28°C (83°F) creates a comfortable atmosphere, ideal for beach activities and exploring the stunning coastal landscape. This month marks a continuation of the summer warmth experienced in the preceding months, blending longer days with refreshing ocean breezes, making it perfect for both relaxation and adventure. As summer starts to fade, September offers a lush, vibrant environment that is enriched by the lingering warmth of the season.

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

The chart illustrates September temperature patterns in San Carlos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec737679838684858482807674
Data source: Temperature data for San Carlos generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in San Carlos

In September, San Carlos experiences a notable increase in precipitation, with an impressive 209 mm (8.2 in) of rain over 23 days, highlighting the transition into the wetter part of the year. This month stands out as one of the rainiest, following the pattern of August, which recorded 116 mm (4.6 in), but September's rainfall significantly shapes the landscape and replenishes local water sources. Interestingly, the frequency of rainy days peaks this month, suggesting a shift towards sustained, albeit lighter, showers that dominate the weather. As the rainy season gains momentum, the October figures look even more dramatic, where 305 mm (12.0 in) is anticipated, indicating that the region is poised for a dynamic end to the monsoon season. This combination of heightened rainfall and frequency underscores a crucial moment for agriculture and the natural ecosystems in San Carlos, reminding residents and visitors alike of nature's powerful rhythms.

September Precipitation Trends in San Carlos

The chart displays monthly precipitation patterns in San Carlos, 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.
JanFebMarAprMayJunJulAugSepOctNovDec100463649982596411621030516999
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in San Carlos

As summer transitions into fall, September in San Carlos, Mexico, experiences a notable spike in humidity, holding steady at 87%—a mark echoing the dampness of August. This pattern of elevated humidity reflects a tropical climate, where the moisture peaks just before the onset of the dry season. The trend shows a gradual increase from the more temperate 70% range seen in March and April to these late summer highs. Interestingly, this increase is followed by an equally moist October and November, hinting at a sustained humidity presence that continues through the year's end. Overall, September stands out as a humid climax, setting the stage for the meteorological shifts that await as the seasons change.

September Average Humidity in San Carlos

This chart illustrates the average monthly humidity levels in San Carlos, 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.
JanFebMarAprMayJunJulAugSepOctNovDec83%76%66%59%64%69%82%87%87%88%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Carlos

As September rolls into San Carlos, Mexico, the UV Index remains consistently high, sitting at 13, which falls into the extreme exposure category. This pattern of intense UV radiation has been prevalent since February, continuing through the summer months and into September, with only a slight dip anticipated in October. With a burn time of just 10 minutes, outdoor enthusiasts should be particularly cautious, as the sun's potency shows no sign of waning. It's essential to take protective measures if you're planning to soak up the sun. For detailed UV Index information throughout the year, check out San Carlos UV Index.

Maximum UV Index Levels in San Carlos for September

The chart shows the monthly maximum UV Index (UVI) for San Carlos 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.
JanFebMarAprMayJunJulAugSepOctNovDec911131413141313131298
Data source: San Carlos 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 Carlos

As summer transitions into autumn, September in San Carlos, Mexico, continues to bask in warmth and light, boasting 291 hours of sunshine. This month's sun-soaked days are a delightful continuation of the trend established earlier in the summer, where July and August reached impressive peaks of 327 and 322 hours respectively. Although September experiences a slight dip from the summer highs, it still outshines the winter months ahead, consistently offering more sunlight than January's modest 204 hours. The gradual decline into the fall months doesn't overshadow the vibrant, sunlit days of September—it's a perfect time to enjoy the beautiful coastal scenery before the shorter days set in.

Monthly Sunshine Duration in San Carlos: September Highlighted

The September sunshine duration represents the total number of hours San Carlos 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.
JanFebMarAprMayJunJulAugSepOctNovDec204h261h303h305h317h281h327h322h291h279h267h270h
Data source: San Carlos September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Carlos During September

As summer transitions into fall, September in San Carlos, Mexico typically experiences a dip in sunny weather, with the chance of clear skies falling to 26%. This marks a notable decrease from the sunnier spring months, where March boasts a robust 71% likelihood of sunshine. Comparatively, September stands alongside the less favorable months of June and August, both of which also reflect reduced sunshine opportunities. While not the sunniest of months, September still offers a blend of warmth and occasional clear days, inviting visitors to enjoy the last vestiges of summer as they head into the more temperate months ahead.

Percentage of Sunny Days in September in San Carlos

The chart illustrates the percentage of sunny days in San Carlos 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 Carlos experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec39%68%71%58%40%19%35%34%26%39%48%71%
Data source: San Carlos September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Carlos in September

As September arrives in San Carlos, Mexico, the daylight duration maintains a delightful balance, offering 12 hours of sunlight. This month is part of a seasonal trend where daylight peaks during the summer, reflecting a gradual increase from 11 hours in January to a peak of 13 hours in June and July. Following this summer peak, September signals a subtle transition, with daylight remaining steady before the day length begins to shorten again in October. This rhythmic pattern creates a warm and inviting ambiance, perfect for enjoying the beautiful landscapes and outdoor activities that San Carlos has to offer.

Average Daylight Hours in San Carlos for September

The chart illustrates the variation in daylight duration in San Carlos throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 11m11h 33m12h 3m12h 32m12h 57m13h 9m13h 2m12h 40m12h 12m11h 42m11h 17m11h 4m
Data source: San Carlos daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in San Carlos

In San Carlos, Mexico, the September winds whisper gently, sporting an average speed of just 1.5 m/s (3 mph). This marks a noticeable dip from the breezier months of July, where gusts can reach up to 2.7 m/s (6 mph). As summer's heat fades, the winds mellow, mirroring the transition from the vibrant warmth of August with its steady 2.3 m/s (5 mph) to the calm embrace of fall. This trend of decreasing wind speed continues into the following months, with October and November maintaining that same soothing 1.5 m/s pace. The overall wind patterns reveal a rhythm of change, reflecting the serene yet dynamic nature of San Carlos as it shifts from the lively summer to a quieter, more contemplative autumn.

Average September Wind Speed in San Carlos

The chart displays monthly wind speed patterns in San Carlos, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.32.22.32.12.01.62.72.31.5 m/s1.51.52.1
Data source: San Carlos September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in San Carlos Compares to Other Months

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

September and January present quite contrasting weather experiences. In September, temperatures are much warmer, with a minimum of 22°C (72°F) and an average of 28°C (83°F), peaking at a sweltering 38°C (101°F). The month also sees significant rainfall, totaling 209 mm (8.2 in) over 23 days, combined with high humidity levels of 87%. In contrast, January brings cooler temperatures, with a minimum of 13°C (56°F) and a milder average of 23°C (74°F), reaching a maximum of 34°C (93°F). Precipitation is less frequent in January, with only 100 mm (3.9 in) across just 9 days, and humidity remains slightly lower at 83%. For more detailed information, you can check San Carlos weather in January.

September and February exhibit notable differences in weather conditions. In September, temperatures range from a minimum of 22°C (72°F) to a scorching maximum of 38°C (101°F), with an average of 28°C (83°F). The month is characterized by high humidity at 87% and substantial rainfall, amounting to 209 mm (8.2 in) over 23 days. In contrast, February offers a much cooler climate, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 35°C (95°F) and an average temperature of 25°C (76°F). Precipitation is significantly reduced to just 46 mm (1.8 in) over 5 days, and humidity is lower at 76%. For more detailed weather information, you can visit San Carlos weather in February.

In comparing the weather between September and March, September is notably warmer and more humid, with average temperatures ranging from a minimum of 22°C (72°F) to a maximum of 38°C (101°F), while March sees milder temperatures from 15°C (60°F) to 37°C (99°F) with an average of 26°C (79°F). September also experiences significantly higher precipitation, with 209 mm (8.2 in) falling over 23 days, compared to just 36 mm (1.4 in) over 6 days in March. Additionally, the humidity in September is higher at 87%, whereas March offers a more comfortable humidity level of 66%. For more detailed information, you can check San Carlos weather in March.

When comparing the weather in September and April, it’s evident that both months offer unique climate characteristics. September boasts warmer average temperatures, with a minimum of 22°C (72°F) and an average of 28°C (83°F), yet it also presents a higher maximum of 38°C (101°F). Precipitation is significantly heavier during this month, totaling 209 mm (8.2 in) over 23 days, leading to a high humidity level of 87%. In contrast, April sees a milder minimum temperature of 17°C (63°F) and a similar average of 29°C (84°F), but it can reach a scorching maximum of 41°C (106°F). Precipitation in April is much lower at 49 mm (1.9 in) over just 7 days, contributing to a more comfortable humidity level of 59%. For a more detailed look at the weather in April, check out San Carlos weather in April.

When comparing the weather in September and May, it's evident that both months exhibit warm temperatures, but with notable differences. September averages a higher minimum temperature of 22°C (72°F) and can reach a maximum of 38°C (101°F), while May starts even warmer with a minimum of 19°C (66°F) and can peak at 41°C (106°F). Despite May's higher average maximum temperature at 30°C (86°F), it experiences significantly less precipitation at 98 mm (3.9 in) over just 11 days compared to September’s 209 mm (8.2 in) over 23 days. Additionally, September is much more humid, with levels at 87%, contrasted with May's lower humidity of 64%. For more details on the climate during May, check out San Carlos weather in May.

In comparing the weather of September and June, both months experience similar minimum and maximum temperatures, ranging from 22°C (72°F) to 38°C (101°F). However, September tends to be slightly cooler on average, with a temperature of 28°C (83°F) compared to June's average of 29°C (84°F). September is characterized by higher humidity at 87%, which can make the heat feel more intense, while June has a more comfortable humidity level of 69%. Rainfall is also noteworthy; September receives 209 mm (8.2 in) of precipitation over 23 days, making it noticeably wetter than June, which has 259 mm (10.2 in) over 18 days. For more detailed information on June weather, visit San Carlos weather in June.

When comparing the weather in September and July, we observe that September experiences slightly lower average temperatures, with a minimum of 22°C (72°F) and an average of 28°C (83°F), compared to July's minimum of 22°C (73°F) and average of 29°C (85°F). July tends to reach higher maximum temperatures, peaking at 40°C (104°F) versus September's maximum of 38°C (101°F). Furthermore, September is notably wetter, with a significant increase in precipitation at 209 mm (8.2 in) over 23 days, contrasted with July's 64 mm (2.5 in) across just 13 days. Humidity levels are also higher in September at 87%, compared to July's 82%. For more detailed insights on July weather, you can refer to San Carlos weather in July.

In September, the weather shows a slight decrease in average temperature compared to August, with September averaging 28°C (83°F) versus August's 29°C (84°F). Both months experience the same minimum and maximum temperatures of 22°C (72°F) and 38°C (101°F), respectively. However, September is significantly wetter, receiving 209 mm (8.2 inches) of precipitation over 23 days, compared to August's 116 mm (4.6 inches) over 19 days. Despite these differences in rainfall, both months maintain a consistent humidity level of 87%. For a more detailed view of August's weather, you can visit San Carlos weather in August.

In comparing the weather of September and October, we find some notable differences. September experiences slightly higher temperatures, with minimums at 22°C (72°F) and maximums reaching 38°C (101°F), while October's temperatures are a bit cooler, ranging from a minimum of 20°C (67°F) to a maximum of 35°C (96°F). Both months are characterized by high humidity, but September has an average of 87%, slightly lower than October's 88%. Precipitation levels also rise in October, with 305 mm (12.0 in) of rain falling over 22 days, compared to September's 209 mm (8.2 in) over 23 days. For more detailed information, you can check San Carlos weather in October.

September and November exhibit notable differences in weather patterns. In September, temperatures soar with a minimum of 22°C (72°F) and can reach highs of up to 38°C (101°F), resulting in an average temperature of 28°C (83°F). September is also characterized by significant rainfall, with 209 mm (8.2 in) of precipitation occurring over 23 days and high humidity at 87%. In contrast, November experiences milder conditions, with a minimum temperature of 16°C (61°F) and a maximum of 34°C (94°F), averaging 25°C (77°F). The month sees reduced rainfall, accumulating to 169 mm (6.6 in) across 16 days, while humidity levels remain slightly higher at 88%. For more detailed insights on November weather, you can check San Carlos weather in November.

In September, temperatures soar with a minimum of 22°C (72°F) and an average of 28°C (83°F), peaking at a sweltering 38°C (101°F). The month is also characterized by significant rainfall, accumulating 209 mm (8.2 in) over 23 days, coupled with high humidity levels at 87%. In contrast, December brings a much more moderate climate, with temperatures ranging from a minimum of 12°C (55°F) to an average of 23°C (74°F), and a maximum reaching 33°C (92°F). Precipitation decreases significantly to 99 mm (3.9 in) over just 11 days, while humidity remains slightly elevated at 88%. For a more detailed look at December's weather, you can visit San Carlos weather in December.

Compare San Carlos's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in San Carlos

September in San Carlos brings a notable shift in weather patterns compared to other months. Characterized by high humidity levels and frequent rain, this month sets itself apart with 23 days of precipitation that often transforms the landscape into a lush green paradise. With temperatures reaching up to 38°C and averaging around 28°C, the heat remains intense, but the moisture in the air makes it feel even more tropical. This combination creates a unique atmosphere, signaling the transition from the dry season to the wetter months ahead. For a more in-depth understanding of these changes and their implications on local climate, visit San Carlos Climate.