Last updated: April 22, 2025
In September, Guanajuato, Mexico experiences a dynamic climate characterized by a maximum temperature of 29°C (85°F) and a comfortable average of 19°C (66°F). The month is marked by a minimum temperature of 9°C (48°F), offering cool nights that contrast with warm days. Rainfall is significant, with 160 mm (6.3 in) of precipitation over approximately 18 days, resulting in a humidity level of 81% that lends an enchanting, lush atmosphere to the region. This combination of warm days and cooler nights, along with ample moisture, creates an ideal setting for enjoying the natural beauty and cultural richness of Guanajuato during this vibrant month.
September in Guanajuato, Mexico, marks the transition from summer to autumn, showcasing a mild climate that's perfect for outdoor exploration. With minimum temperatures around 9°C (48°F) and an average of 19°C (66°F), it feels refreshingly comfortable, especially compared to the hotter summer months. The maximum temperature can reach 29°C (85°F), making sunny afternoons ideal for enjoying the vibrant local culture. This month, temperatures start to cool down slightly from the peak heat of July and August, which consistently feature warmer averages. As September progresses, the city's charm unfolds in pleasant weather, inviting visitors to experience its rich history and colorful streets.
In September, Guanajuato experiences a significant surge in rainfall, with approximately 160 mm (6.3 in) of precipitation spread over 18 days. This marks a continuation of the region's wet season, building on the heavy downpours from previous months like June and July, which saw 172 mm (6.8 in) and 164 mm (6.5 in) respectively. The trend reveals a distinct pattern where the summer months bring increased moisture, peaking in September before gradually tapering off in the fall. As the rain showers nourish the landscape, they create a vibrant tapestry of colors, showcasing the region's lush beauty that stands in stark contrast to the drier winter months ahead.
As September rolls into Guanajuato, Mexico, residents and visitors alike experience a notable increase in humidity, peaking at 81%. This rise marks a transition from the more moderate levels experienced in the summer months; notably, August had a humidity level of 68%. The trend showcases a gradual ascent toward the wetter months ahead, as October and November follow closely with 83% and 84% humidity, respectively. Consequently, the air becomes increasingly lush and heavy, signaling the dynamic shifts in climate that characterize this vibrant region as it moves into the heart of the fall season.
In September, the UV Index in Guanajuato, Mexico, remains high at 14, categorizing it as extreme with a burn time of just 10 minutes. This trend of elevated UV exposure continues from the preceding months of June, July, and August, where the index also peaked at 14. As we transition into fall, the UV Index slightly decreases in October but still maintains an extreme classification at 13. Overall, the data indicates a consistent pattern of high to extreme UV levels from late spring through early autumn, urging residents and visitors alike to take necessary precautions against sun exposure. For more details, visit Guanajuato UV Index.
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September in Guanajuato, Mexico, boasts 291 hours of sunshine, a delightful continuation of the sun-drenched months preceding it. After a remarkable peak in May with 343 hours, the summer season begins its gentle retreat, with hours dipping slightly as autumn approaches. The consistent sunshine from June to August, averaging 320 to 343 hours, reflects the region's vibrant summer, but September hints at the transition to cooler days. While the sunshine begins to wane compared to the summer highs, this month still offers a brilliant balance of warmth and light, making it an ideal time to explore Guanajuato's rich culture and picturesque landscapes before the shorter days of fall descend.
When considering the likelihood of sunny weather in September in Guanajuato, Mexico, it's important to note a clear trend in the data. September shows a significantly low chance of sunshine, at just 22%, which places it among the least favorable months for sunny days. This is a stark contrast to the vibrant sunshine often enjoyed in earlier months like February (88%) and March (78%). Following a peak in early spring, the chances of sunny weather dip markedly through the summer, with September continuing this trend. As autumn approaches, residents and visitors might find themselves contending more often with overcast skies, making it ideal for those who prefer milder weather, albeit at the cost of sun-soaked days.
As September unfolds in Guanajuato, Mexico, residents and visitors enjoy approximately 12 hours of daylight, marking a continuation of the summer season's generous sunshine. This month joins the ranks of April and August, where daylight remains steady at twelve hours, signaling a subtle transition towards the shorter days of autumn. Following the gradual increase in daylight throughout the spring and early summer—where May to July bask in a peak of 13 hours—September reflects a slight pullback, reminiscent of the upcoming changes in October and beyond. As the days grow shorter, the rich colors and cooler temperatures begin to weave the vibrant tapestry of fall, inviting outdoor activities while still allowing ample time to soak in Guanajuato’s beauty.
In September, Guanajuato experiences a gentle breeze, with an average wind speed of 2.2 m/s (5 mph), the lowest recorded for the year. This month marks a transition as the summer winds taper off, giving way to a more subdued atmosphere that invites leisurely strolls through the vibrant streets. The prevailing calmness in September follows a trend of fluctuating wind speeds, peaking in April at 3.2 m/s (7 mph), while late summer shows a gradual decline. As autumn approaches, the overall reduction in windspeed hints at the onset of a cozy season, perfect for enjoying the rich cultural tapestry of this charming city.
The weather in Guanajuato 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 Guanajuato and find detailed weather information for every month.
The weather in September is notably warmer and more humid compared to January. With average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 29°C (85°F), September experiences significant rainfall, accumulating 160 mm (6.3 in) across an average of 18 days. In contrast, January offers a much colder climate, with temperatures dropping to a minimum of 1°C (34°F) and averaging 14°C (58°F), while the maximum is similar at 28°C (83°F). Furthermore, January sees significantly less precipitation, totaling just 4 mm (0.2 in) over approximately 1 day. This results in a lower humidity level of 74% for January compared to the 81% in September. For more details on January weather, you can visit Guanajuato weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (85°F), with an average of 19°C (66°F). This month sees significant rainfall, with 160 mm (6.3 in) of precipitation spread over 18 days, contributing to a high humidity level of 81%. In contrast, February offers milder conditions, where temperatures fluctuate from a low of 3°C (38°F) to a warm high of 30°C (87°F), with an average of 17°C (62°F). The month is notably drier, recording only 7 mm (0.3 in) of precipitation over a single day and lower humidity at 65%. For more detailed insights on February weather, you can visit Guanajuato weather in February.
September and March offer contrasting weather experiences. In September, temperatures range from a cooler 9°C (48°F) to a warm 29°C (85°F), with an average of 19°C (66°F). This month is quite rainy, featuring approximately 160 mm (6.3 in) of precipitation over 18 days, and high humidity at 81%. In contrast, March sees milder temperatures, with a minimum of 4°C (40°F) and a maximum of 32°C (90°F), averaging a comfortable 19°C (67°F). The month is notably drier, receiving only 11 mm (0.4 in) of rain over just 2 days, alongside lower humidity at 58%. For more details, you can explore Guanajuato weather in March.
In comparing the weather between September and April, one can observe notable differences in temperature and precipitation. September showcases a wider temperature range with minimums around 9°C (48°F) and maximums reaching up to 29°C (85°F), while April offers slightly cooler minimum temperatures of 7°C (44°F) but significantly higher maximums of 34°C (94°F). Furthermore, September experiences considerably more rainfall, with 160 mm (6.3 in) over 18 days, resulting in a humid atmosphere at 81%. In contrast, April enjoys a much drier climate with only 5 mm (0.2 in) of precipitation across just 1 day, coupled with lower humidity at 58%. For a further look at what to expect, check out Guanajuato weather in April.
September and May exhibit distinct weather patterns, highlighting the transition from summer to autumn. In September, temperatures range from a cooler minimum of 9°C (48°F) to a warm maximum of 29°C (85°F), with an average of 19°C (66°F). However, this month also brings significant rainfall, totaling 160 mm (6.3 in) over 18 days, and higher humidity levels at 81%. In contrast, May features milder temperatures, with a minimum of 11°C (51°F) and a maximum soaring to 35°C (96°F), and an average of 22°C (73°F). Precipitation is notably lower in May, at 46 mm (1.8 in) spread over just 8 days, and the humidity is more comfortable at 67%. For more detailed insights into May weather, check out Guanajuato weather in May.
When comparing the weather in September and June, a few notable differences emerge. September tends to be cooler with average temperatures around 19°C (66°F), while June boasts warmer conditions with averages of 21°C (70°F) and maximums reaching up to 35°C (95°F). Although both months experience significant rainfall, September has slightly less precipitation at 160 mm (6.3 in) over 18 days compared to June’s 172 mm (6.8 in) across 15 days. Humidity levels are higher in September at 81%, compared to 76% in June, contributing to a distinctly different atmosphere between the two months. For more details about June weather, you can check Guanajuato weather in June.
In comparing the weather of September and July, we can see some notable differences. September experiences slightly cooler temperatures, with a minimum of 9°C (48°F), while July starts at a higher minimum of 11°C (53°F). Both months have a similar average temperature of 19°C (66°F), but July peaks at a maximum of 31°C (88°F), whereas September's maximum is 29°C (85°F). Precipitation is quite comparable, with September receiving 160 mm (6.3 in) over 18 days and July having 164 mm (6.5 in) over 19 days. Additionally, September boasts a higher humidity level at 81% compared to July's 67%. For more detailed information about July weather, you can refer to Guanajuato weather in July.
September weather shows a slight decrease in average temperatures compared to August, with minimums dropping to 9°C (48°F) and averages at 19°C (66°F). In contrast, August maintains a warmer range, with minimum temperatures around 12°C (54°F) and an average of 20°C (68°F). Although September experiences a bit more precipitation at 160 mm (6.3 in) over 18 days, compared to 153 mm (6.0 in) over 17 days in August, its humidity is notably higher at 81%, making it feel more muggy than the drier August conditions with 68% humidity. For more details on August weather patterns in this region, you can refer to Guanajuato weather in August.
September brings milder temperatures, with nighttime lows around 9°C (48°F) and daytime highs peaking at 29°C (85°F), while October experiences slightly cooler nights at 5°C (42°F) and warmer daytime highs reaching 31°C (87°F). The month of September sees significantly more rainfall, accumulating 160 mm (6.3 in) over 18 days, in contrast to October's drier conditions, which average only 63 mm (2.5 in) over just 8 days. Humidity levels remain fairly consistent, with September at 81% and October slightly higher at 83%. For more detailed insights into October's climate, you can visit Guanajuato weather in October.
September and November showcase distinct differences in weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (85°F), with an average of 19°C (66°F). The month experiences significant rainfall, totaling 160 mm (6.3 in) over 18 days, and boasts a high humidity level of 81%. In contrast, November is cooler, with temperatures dipping to a minimum of 1°C (34°F) but reaching up to 30°C (86°F) during the warmest parts of the day, with an average temperature of 16°C (61°F). Notably, November is much drier, receiving only 19 mm (0.8 in) of precipitation over just 2 days, while humidity levels rise slightly to 84%. For more detailed insights into the weather in November, you can visit Guanajuato weather in November.
In September, the weather is significantly warmer, with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 29°C (85°F), while experiencing considerable precipitation of 160 mm (6.3 in) over 18 days and maintaining high humidity levels at 81%. In contrast, December brings a much cooler climate, featuring average temperatures from a low of 0°C (33°F) to a high of 27°C (82°F), with dramatically reduced precipitation of only 4 mm (0.2 in) across just 1 day, while humidity remains the same at 81%. For more detailed information on the weather in December, you can check out Guanajuato weather in December.
September in Guanajuato marks a transition period, characterized by a refreshing blend of warm temperatures and increased rainfall. Unlike the arid months of summer, this month experiences higher humidity levels and a noticeable uptick in precipitation, making for a vibrant and lush landscape. Visitors can expect comfortable daytime warmth, but should prepare for cooler evenings, which contrasts with the often stifling heat of earlier months. This dynamic weather pattern enhances the city’s charm, offering a unique experience for those exploring its rich culture and history. To learn more about how the weather shapes life in this beautiful city, visit Guanajuato Climate.