Last updated: April 22, 2025
In September, Baja California, Mexico experiences a dynamic blend of weather characteristics that showcases its Pacific coastal allure. The region sees maximum temperatures peaking at 33°C (91°F), averaging a comfortable 24°C (76°F), while nighttime lows hover around 19°C (66°F). With high humidity levels at 87%, the atmosphere can feel notably tropical. Rainfall is frequent, as the area records an impressive 183 mm (7.2 in) over approximately 25 days, bringing refreshing showers that nourish the landscape. This combination of warmth and moisture creates a unique climate, perfect for those looking to explore the vibrant natural beauty of Baja California.
In September, Baja California, Mexico, maintains a pleasant and warm climate, with temperatures that reflect the ending of summer. The month starts with lows around 19°C (66°F), which are consistent with late summer warmth, while average temperatures hover around a comfortable 24°C (76°F), perfect for outdoor activities. The highs reach up to 33°C (91°F), mirroring the temperatures seen in August, indicating that the summer heat lingers a little longer before giving way to cooler fall nights. Overall, September continues a trend of gradual warmth, providing an inviting atmosphere for visitors looking to enjoy the stunning landscapes and vibrant culture of this beautiful region before the cooler months set in.
September marks a significant shift in the precipitation patterns of Baja California, Mexico, as the rainy season approaches its peak. With 183 mm (7.2 in) of rainfall over an impressive 25 days, September maintains the momentum established in the previous months, particularly June, which recorded the highest precipitation at 208 mm (8.2 in). This consistent increase in rainfall reflects a vibrant wet season, contributing to the region's lush landscapes and replenishing local water sources. In contrast, the months prior to September see varying amounts of rain, with May leading into the wet season at 79 mm (3.1 in). As October approaches, rainfall begins to taper off, hinting at the transition to drier months ahead. This rhythm of rainfall not only shapes the climate but also influences agricultural practices and the local ecosystem.
In Baja California, Mexico, September marks a peak in humidity at 87%, tying with August for the highest levels of the year. As summer transitions into autumn, the sultry air lingers, creating a distinctly humid atmosphere. This notable increase in humidity begins as early as July and continues through October, illustrating a gradual rise that culminates in the late summer months. Following the drier spring months of April and May, which see humidity levels dip to 59% and 64% respectively, the trend toward higher moisture content becomes apparent. This seasonal shift not only reflects the changing climate but also enhances the lushness of the region, contributing to its vibrant landscapes as summer fades.
In September, Baja California experiences a UV Index of 14, maintaining the extreme exposure category that has characterized the summer months. With a quick burn time of just 10 minutes, sun safety becomes crucial this time of year, reflecting a consistent trend of high UV levels from February through October. Interestingly, the UV Index peaks at 14 from March to July, and holds steady in September, demonstrating the area's resilient sun strength as it transitions into autumn. Visitors and locals alike are encouraged to take protective measures while enjoying the region's beautiful outdoors. For more detailed information, check out the Baja California UV Index.
UV Risk Categories
September in Baja California, Mexico, offers a delightful balance of sunshine, with 275 hours of sunlight illuminating the landscape. As summer wanes, the light gradually decreases, following a vibrant pattern set earlier in the year—March witnesses the peak at 315 hours, while June dips to 260 hours. The month of September reflects this transition, retaining a warm glow reminiscent of the lively summer months but hinting at the approaching mildness of autumn. With sunshine levels remaining consistent throughout early fall, it's the perfect time to enjoy Baja's stunning vistas and outdoor adventures before the cooler months set in.
In September, Baja California, Mexico, experiences a notably low likelihood of sunny weather, with only a 12% chance of sunshine. This marks a distinct trend as the summer months typically yield even lower probabilities, hitting a low of 11% in June and peaking at a mere 14% in August. As the region transitions into the fall, the chance of sunny days gradually improves, with October showing a more promising 29% likelihood. Overall, those planning a trip to Baja California in September should prepare for cloudy skies and the possibility of rain, as the weather is markedly less favorable compared to earlier months in the year.
In Baja California, Mexico, September ushers in a delightful balance of daylight, offering 12 hours of sunshine each day. This consistent daylight duration is part of a broader seasonal trend; the region enjoys a gradual increase in daylight from the 11 hours found in the winter months of January and February, peaking to 13 hours in June. As summer fades and September rolls in, the hours of daylight remain stable before a gentle decrease begins in October. This rhythm creates a vibrant atmosphere perfect for outdoor adventures and the appreciation of breathtaking sunsets, making September an ideal month to savor the beauty of Baja California.
As summer gracefully transitions to autumn, September in Baja California brings a gentle whisper of the wind with an average speed of only 1.9 m/s (4 mph). This marks a slight increase from the languid breezes of August, but it remains one of the calmest months of the year. Following a trend of diminishing winds throughout the summer, September offers a brief respite before the winds pick up again in October, hinting at the approaching November gusts that will reach speeds of 4.4 m/s (10 mph). Ultimately, this month serves as a tranquil bridge, inviting visitors to bask in the serene coastal ambiance, just before the wind-driven energy returns.
The weather in Baja California 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 Baja California and find detailed weather information for every month.
September and January present quite contrasting weather patterns. In September, the temperatures range from a minimum of 19°C (66°F) to a maximum of 33°C (91°F), with an average temperature of 24°C (76°F). This month sees a significant amount of rainfall, with 183 mm (7.2 in) occurring over 25 days, resulting in a high humidity level of 87%. In contrast, January experiences milder temperatures, ranging from a minimum of 10°C (50°F) to a maximum of 32°C (91°F), with an average of 20°C (69°F). The precipitation drops dramatically to just 9 mm (0.3 in) over only 2 days, and humidity remains relatively lower at 83%. For more insights on January weather, check out Baja California weather in January.
September and February showcase contrasting weather patterns. In September, temperatures range from a minimum of 19°C (66°F) to a maximum of 33°C (91°F), with an average of 24°C (76°F) and a notable 183 mm (7.2 in) of rain falling over 25 days, coupled with high humidity at 87%. In stark contrast, February experiences milder temperatures, with a minimum of 10°C (51°F) and a maximum that matches September at 33°C (92°F), but an average of 22°C (72°F) and only 6 mm (0.2 in) of precipitation throughout the month, leading to significantly lower humidity at 76%. This shift highlights the dry, more comfortable conditions of February compared to the rainy, humid feel of September. For more details, see Baja California weather in February.
In September, the weather is characterized by warm temperatures, with a minimum of 19°C (66°F) and an average of 24°C (76°F), peaking at a high of 33°C (91°F). However, it is also quite wet, receiving about 183 mm (7.2 in) of precipitation over 25 days, and the humidity remains high at 87%. In contrast, March brings milder temperatures, with a minimum of 13°C (56°F) and an average of 23°C (74°F), reaching a maximum of 34°C (93°F). Notably, March experiences much drier conditions with only 8 mm (0.3 in) of precipitation across 0 rainy days, and the humidity drops to 66%. For more detailed information, check out Baja California weather in March.
When comparing the weather in September and April, a few notable differences emerge. September tends to be warmer, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 33°C (91°F), while April starts cooler at a minimum of 15°C (59°F) and reaches a maximum of 35°C (96°F). However, September is significantly wetter, with average precipitation of 183 mm (7.2 in) spread over 25 days, in contrast to April’s much drier conditions, which see only 21 mm (0.8 in) of rain over just 6 days. Additionally, September experiences higher humidity levels at 87%, compared to April's more comfortable 59%. For more specific insights into April weather, you can check Baja California weather in April.
In comparing the weather of September and May, we can observe notable differences in temperature and precipitation patterns. September tends to be warmer, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 33°C (91°F), while May exhibits slightly lower temperatures, with a minimum of 16°C (61°F) and a maximum of 34°C (94°F). Humidity levels are significantly higher in September at 87%, compared to May's drier 64%, contributing to a more uncomfortable feel during the former month. Additionally, September experiences substantial rainfall, accumulating 183 mm (7.2 in) over 25 days, whereas May sees much less precipitation at 79 mm (3.1 in) over 17 days. For more detailed information, check out Baja California weather in May.
In comparing the weather between September and June, we find that both months share similar temperature ranges, with nighttime lows around 19°C (66°F), average temperatures of 24°C (76°F), and maximum highs reaching 33°C (91°F). However, September tends to be wetter, receiving 183 mm (7.2 in) of precipitation, compared to June's 208 mm (8.2 in), both spread over the same number of days—25. Notably, humidity levels in September are significantly higher at 87%, whereas June maintains a more comfortable humidity of 69%. For a more detailed look at the weather conditions in June, you can check out Baja California weather in June.
In comparing the weather between September and July, both months exhibit warm temperatures, but there are notable differences. July typically sees a higher average temperature of 25°C (77°F) and a maximum of 34°C (93°F), while September's average is slightly lower at 24°C (76°F) with a peak of 33°C (91°F). Interestingly, September experiences more precipitation, totaling 183 mm (7.2 in) over 25 days compared to July's 109 mm (4.3 in) over 21 days, leading to a higher humidity level of 87% in September as opposed to 82% in July. For more insights, check out Baja California weather in July.
September and August have similar temperature ranges, with both months seeing minimums of 19°C (66°F), averages of 24°C (76°F), and maximums reaching 33°C (91°F). However, September experiences slightly more rainfall, with 183 mm (7.2 in) over 25 days compared to August's 178 mm (7.0 in) over 22 days. Both months maintain a high humidity level of 87%, creating a consistently warm and muggy atmosphere. For a deeper look into August weather specifics, you can visit Baja California weather in August.
In September, the weather is typically warmer, with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 33°C (91°F), and an average temperature of 24°C (76°F). It also sees significant precipitation, with a total of 183 mm (7.2 in) over 25 days and high humidity at 87%. By October, temperatures begin to cool slightly, featuring a minimum of 16°C (61°F), an average of 23°C (74°F), and a maximum of 32°C (89°F). Precipitation decreases to 149 mm (5.9 in) over 20 days, and humidity remains high at 88%. For more detailed information, check out Baja California weather in October.
September weather is characterized by warmer temperatures, with minimums around 19°C (66°F) and averages reaching up to 24°C (76°F), peaking at a hot 33°C (91°F). In addition to the heat, September sees significant rainfall, totaling 183 mm (7.2 in) across 25 days, making it one of the wetter months. Conversely, November brings cooler temperatures, with minimums dipping to 12°C (55°F) and averages around 22°C (72°F), while still maintaining a maximum temperature of 32°C (91°F). Rainfall drops dramatically in November, with only 17 mm (0.7 in) accumulated over just 4 days. Humidity levels remain fairly high in both months, with November slightly higher at 88%. For more detailed information on November conditions, check out Baja California weather in November.
September and December showcase a notable shift in weather patterns. In September, temperatures range from a minimum of 19°C (66°F) to a maximum of 33°C (91°F), with an average of 24°C (76°F). The month is marked by significant rainfall, receiving 183 mm (7.2 in) over approximately 25 days, and high humidity levels at 87%. In contrast, December brings a cooler climate, with temperatures dipping to a minimum of 11°C (52°F) and a maximum of 31°C (89°F), while maintaining an average of 21°C (70°F). This month sees drastically reduced precipitation, with only 10 mm (0.4 in) over just 1 day, and slightly increased humidity at 88%. For more detailed insights, you can check Baja California weather in December.
As September unfolds in Baja California, the weather presents a unique transitional phase, shifting from the warm summer months toward a more temperate fall. With an average temperature of 24°C (76°F), the evenings start to offer a welcome coolness, especially after the sweltering heat peaks at 33°C (91°F) during the day. This month also brings an increase in rainfall, contributing to a higher humidity level hovering around 87%, creating a lush landscape that contrasts sharply with the drier spells of preceding months. While rain may grace the region on about 25 days, the vibrant atmosphere is a celebration of change, making September an extraordinary time to experience the rich beauty of Baja California. For a deeper look into how September compares to other months, be sure to check out Baja California Climate.