Last updated: April 22, 2025
In September, Chapultepec experiences a mild climate characterized by an average temperature of 18°C (64°F), with maximums reaching up to 28°C (82°F) and minimal drops to around 11°C (52°F). The month is marked by significant precipitation, accumulating to about 274 mm (10.8 in) across 25 days, leading to a humidity level of around 82%. Visitors should be prepared for frequent rain, making this period lush and vibrant, perfect for experiencing the city's rich natural beauty and cultural experiences.
In September, Chapultepec experiences a delightful transition with temperatures that hint at the approaching autumn. The month starts off with minimum temperatures averaging 11°C (52°F), perfect for early morning strolls, gradually rising to a comfortable average of 18°C (64°F) as the day progresses. With a maximum of around 28°C (82°F), the warmth invites visitors to enjoy outdoor activities amidst the park's lush landscapes. Compared to the summer months, September offers a slight reprieve from the heat, making it an ideal time for exploration. As the month closes, the weather starts to shift, setting the stage for the cooler temperatures of October.
September is a peak month for precipitation in Chapultepec, Mexico, where an impressive 274 mm (10.8 in) of rain falls on average over 25 days. This marks a significant increase compared to the preceding months, illustrating the transition into the wettest part of the year. Following a generally dry season characterized by minimal rainfall earlier in the year, September's substantial rainfall contributes to a lush landscape and replenishes local water sources. The intensity and frequency of precipitation during this month not only highlight the region's monsoon-like patterns but also set the stage for the cooler, drier conditions that typically follow in October.
In September, Chapultepec experiences a peak in humidity, reaching 82%, maintaining the heightened moisture levels established in the preceding months of July and August. This summer-like humidity trend marks a significant contrast to the drier winter months, where figures hover around the mid-60s to low 70s. As the year progresses from the relatively comfortable conditions of March and April at 59% and 62% respectively, the transition to the more humid summer months becomes apparent. The consistent rise in humidity during the warmer seasons not only envelops the area in a lush atmosphere but also hints at the impending change as the humidity starts to taper off in October, reflecting the gradual shift towards drier air as autumn approaches.
In September, the UV Index in Chapultepec, Mexico, is notably high at 14, maintaining the extreme exposure category that characterizes the months leading up to it. Sandwiched between the peak summer months of July and August, where the index also recorded a stellar high of 15 and 14 respectively, September continues to demand caution under the sun. With a burn time lingering around just 10 minutes, the trend throughout the year showcases a persistent need for sun protection, particularly from March to September when the levels peak. As fall approaches, the UV Index begins a slow descent, but during September, residents and visitors alike should remain vigilant. For more details on UV exposure levels, check out the full information here: Chapultepec UV Index.
UV Risk Categories
September in Chapultepec, Mexico, brings with it a warm embrace of sunshine, with an impressive 250 hours of bright daylight. While this marks a slight decrease from the vibrant summer months, the sun continues to shine generously compared to the earlier part of the year, showcasing a steady trend of increasing daylight as the year unfolds. From a cozy 241 hours in January to a peak of 320 hours in March, each month has danced to the rhythm of the seasons. As autumn begins to gently settle in, September's hours remind us of summer's lasting warmth, hinting at the lingering daylight before the sun's retreat in the cooler months ahead. Overall, the lengthening days through spring and summer serve as a vibrant backdrop to the lush beauty of Chapultepec, inviting residents and visitors alike to bask in its charm.
In Chapultepec, Mexico, September heralds the transition into the rainy season, marked by a notably low chance of sunny weather at just 8%. This significant decline follows the summer months, where sunlight is rarely seen, with July and August posting only 19% and 16% chances, respectively. The trend indicates a dramatic shift from the more favorable conditions observed earlier in the year, particularly in February and March, when the likelihood of sunshine peaks at 79% and 73%. As fall approaches, residents and visitors alike should brace for a wetter climate, making sunny days in September a rare and cherished occurrence.
In Chapultepec, Mexico, September experiences a delightful shift in daylight, offering 12 hours of sunshine that mirrors the previous summer months of June, July, and August. This steady daylight duration reflects a gradual transition from the longer days of summer towards the shorter ones of autumn. As the year progresses, daylight begins to shorten slightly after September, hinting at the onset of the cooler months ahead. The consistency of 12 hours throughout the late summer and early autumn creates a balanced environment, perfect for enjoying the vibrant natural beauty of Chapultepec during this time.
As September unfolds in Chapultepec, Mexico, the gentle caress of the breeze instills a serene ambiance, with average wind speeds hovering around 1.2 m/s (3 mph). This marks a slight dip from the mild gusts of earlier months, indicating a transition to the calmer days of autumn. Interestingly, the wind's rhythm throughout the year reveals a subtle pattern; from the invigorating 1.6 m/s (4 mph) in April, the speeds have generally retreated as the seasons progress, creating a tranquil environment perfect for leisurely strolls among the park's lush landscapes. Despite these shifts, the consistent, inviting wind speeds remind us that even the softest whispers of nature can have a profound impact, enhancing the beauty of Chapultepec's rich surroundings as summer gracefully fades into fall.
The weather in Chapultepec 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 Chapultepec and find detailed weather information for every month.
September and January present contrasting weather conditions. In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 28°C (82°F), creating a warm average of 18°C (64°F). This month is characterized by high humidity at 82% and significant rainfall, with about 274 mm (10.8 in) falling over approximately 25 days. In stark contrast, January features cooler temperatures, with a minimum of 4°C (39°F) and a maximum reaching 28°C (83°F), but an average of only 15°C (60°F). Additionally, January is much drier, with minimal precipitation of just 7 mm (0.3 in) over a mere 1 day and lower humidity at 65%. For more detailed information on January weather, you can refer to Chapultepec weather in January.
When comparing September and February weather, there are notable differences in temperature, precipitation, and humidity levels. September typically showcases a wider temperature range, with minimums around 11°C (52°F) and maximums reaching up to 28°C (82°F), while February has a cooler minimum of 4°C (39°F) and a similar maximum of 29°C (84°F). Precipitation is significantly heavier in September, averaging 274 mm (10.8 in) over 25 days, whereas February experiences virtually no rainfall, with only 3 mm (0.1 in) recorded on 0 days. Additionally, the humidity in September is quite high at 82%, contrasting sharply with February's more comfortable level of 61%. For more specific details, you can visit Chapultepec weather in February.
In comparing the weather of September and March, we observe notable differences in temperature, precipitation, and humidity. September typically features a wider temperature range, with minimums around 11°C (52°F) and maximums reaching 28°C (82°F), while March has slightly cooler nighttime temperatures at 8°C (46°F) and warmer daytime highs peaking at 30°C (87°F). In terms of precipitation, September is significantly wetter, with 274 mm (10.8 in) spread over 25 days, compared to March's mild 20 mm (0.8 in) over just 4 days. Furthermore, the humidity levels are much higher in September at 82%, while March offers a more comfortable climate with humidity averaging 59%. For more specifics on weather patterns during March, you can explore Chapultepec weather in March.
In comparing the weather of September and April, we can observe notable differences in temperature, precipitation, and humidity. September tends to be cooler with minimum temperatures around 11°C (52°F) and maximums reaching up to 28°C (82°F), while April experiences warmer temperatures, with a minimum of 8°C (46°F) and maximums soaring to 32°C (90°F). Additionally, September is quite wet, receiving an average of 274 mm (10.8 in) of rain over 25 days, in stark contrast to April's much drier conditions that bring only 38 mm (1.5 in) of precipitation across just 7 days. Humidity levels also differ significantly, with September's average reaching 82% compared to April's more comfortable 62%. For those interested in a deeper look at the climate specifics, check out Chapultepec weather in April.
September and May offer distinct weather patterns, with September typically experiencing slightly cooler average temperatures and higher humidity levels. In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 28°C (82°F), accompanied by substantial precipitation of 274 mm (10.8 in) over 25 days, leading to a humid environment with 82% humidity. In contrast, May showcases warmer temperatures with a minimum of 11°C (52°F) and a maximum of 30°C (87°F), while experiencing significantly lower precipitation of 103 mm (4.1 in) across 19 days, contributing to a drier atmosphere with 73% humidity. For more detailed insights, check out Chapultepec weather in May.
In comparing the weather of September and June, both months feature similar temperature ranges, with minimums around 11°C (52°F), average temperatures of 18°C (64°F), and maximums reaching close to 28°C (82°F in September, slightly higher at 83°F in June). However, September experiences notably higher precipitation, totaling 274 mm (10.8 in) over 25 days, compared to June's 240 mm (9.5 in) under the same number of rainy days. Additionally, September's humidity is slightly higher at 82%, compared to June's 78%. This results in a more humid and wetter atmosphere in September, contrasting with the drier conditions of June. For more detailed climate information, you can check Chapultepec weather in June.
In comparing the weather of September and July, we see a few notable differences. September tends to be slightly warmer, with average temperatures remaining around 18°C (64°F) but peaking higher at 28°C (82°F) compared to July's maximum of 27°C (81°F). Both months have a similar minimum temperature, with September at 11°C (52°F) and July at 10°C (50°F). However, September experiences significantly higher precipitation, with 274 mm (10.8 in) over 25 days, while July sees just 166 mm (6.5 in) across 20 days. The humidity is also higher in September at 82%, compared to 79% in July. For a closer look at July's weather, you can check Chapultepec weather in July.
In September, the weather remains relatively mild, with minimum temperatures of 11°C (52°F) and an average temperature of 18°C (64°F), similar to August. However, September experiences slightly warmer maximum temperatures, reaching up to 28°C (82°F) compared to August's maximum of 26°C (80°F). Both months have the same number of rainy days at 25, but September sees increased precipitation of 274 mm (10.8 in) versus August's 239 mm (9.4 in). Humidity stays consistent at 82% for both months, contributing to a similarly humid atmosphere. For more specifics on August weather, you can check out Chapultepec weather in August.
In comparing the weather between September and October, we can observe some notable differences. September features a wider temperature range with a minimum of 11°C (52°F) and a maximum of 28°C (82°F), while October sees slightly cooler conditions, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (82°F). Additionally, September is significantly wetter, receiving 274 mm (10.8 in) of precipitation over 25 days, compared to October’s 134 mm (5.3 in) over just 16 days. Despite the decrease in rainfall, humidity remains relatively high, with 82% in September and a slight decline to 79% in October. For more detailed information, check out Chapultepec weather in October.
In September, the weather is noticeably warmer with average temperatures reaching 18°C (64°F) and highs of 28°C (82°F), while November sees a drop in average temperature to 16°C (62°F). September experiences significantly more precipitation, with 274 mm (10.8 in) of rain over 25 days, compared to just 19 mm (0.8 in) over 3 days in November. Additionally, the humidity in September is higher at 82%, whereas November has a more comfortable humidity level of 72%. For those looking for more specific details, you can check out the Chapultepec weather in November.
In September, the weather tends to be quite warm, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 28°C (82°F) and an average of 18°C (64°F). This month also experiences significant precipitation, averaging 274 mm (10.8 in) spread over 25 days, resulting in high humidity levels at 82%. In contrast, December sees much cooler temperatures, with a minimum of just 2°C (36°F) and an average of 16°C (61°F), while still reaching a maximum of 27°C (81°F). Notably, December has drastically reduced rainfall, with only 10 mm (0.4 in) over just 2 days and lower humidity at 70%. For a more detailed look at the weather in December, you can visit Chapultepec weather in December.
As September unfolds in Chapultepec, the weather shifts dramatically, setting itself apart from the drier months. With a notable increase in humidity levels reaching 82%, the air feels thicker, often accompanied by frequent precipitation on 25 days, making it one of the rainiest months of the year. Temperatures hover around a comfortable average of 18°C (64°F), but can peak at a warm 28°C (82°F), presenting a blend of summer warmth and autumnal freshness. This unique climate establishes September as a transitional month that not only rejuvenates the landscape but also offers a refreshing change for visitors. For more on what to expect throughout the year, check out Chapultepec Climate.