September Weather in Coronado, Mexico

Last updated: April 22, 2025

In September, Coronado, Mexico, experiences a warm and humid climate, with maximum temperatures soaring up to 36°C (97°F) and a comfortable average of 23°C (73°F). The nights offer a refreshing drop to a minimum of 12°C (53°F), providing a pleasant respite from the daytime heat. This month witnesses 93 mm (3.7 in) of rainfall spread across approximately 12 days, contributing to the lush scenery of the region. With humidity levels hovering around 86%, visitors can expect a tropical atmosphere that enhances the vibrant beauty of Coronado.

September Temperature in Coronado

In September, Coronado, Mexico, experiences a transition from the intense summer heat, with daytime highs reaching up to 36°C (97°F), to a more moderate climate as fall approaches. The average temperature settles at a comfortable 23°C (73°F), while nighttime lows dip to 12°C (53°F), providing a refreshing reprieve from the day’s warmth. This month marks a crucial shift in the weather pattern, as humidity levels also begin to decrease, making it an ideal time for outdoor activities. Overall, September strikes a balance between lingering summer vibes and the onset of cooler autumn days, inviting travelers to enjoy the vibrant landscapes and inviting atmosphere of Coronado.

September Weather in Coronado: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Coronado, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec545966727882787873696254
Data source: Temperature data for Coronado 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 Coronado

In September, Coronado, Mexico, experiences a significant rise in precipitation, with an impressive 93 mm (3.7 in) falling over 12 days. This peak marks the culmination of the rainy season, contrasting sharply with the drier months of the year, where rainfall is minimal. Starting from a mere 3 mm in January, the trend steadily climbs, particularly evident in July and August, which also see increased rainfall but fall short of September's total. The heavy September rains not only highlight the shift from the earlier months but also signal the transition toward drier days ahead as the season progresses into fall, making it a pivotal month in Coronado's annual weather pattern.

September Precipitation Trends in Coronado

The chart displays monthly precipitation patterns in Coronado, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3453624615593281216
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Coronado

September in Coronado, Mexico, brings a significant rise in humidity, peaking at 86%—the highest level of the year. Following the warmer summer months, where humidity levels hovered around 72% to 77%, September serves as a transition into the fall, as moisture increases noticeably. This trend sets the stage for the wet season, with October and November also retaining high humidity—82% and 85%, respectively. The month wraps up the summer heat while ushering in a more humid atmosphere, which persists into the final months of the year. Residents and visitors alike can expect a sultry backdrop as they enjoy the vibrant coastline and lush landscapes during this time.

September Average Humidity in Coronado

This chart illustrates the average monthly humidity levels in Coronado, 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.
JanFebMarAprMayJunJulAugSepOctNovDec75%65%58%48%48%54%72%77%86%82%85%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Coronado

In September, Coronado, Mexico, experiences a UV Index of 12, signifying an extreme level of ultraviolet radiation and a maximum burn time of just 10 minutes. This trend of high UV exposure continues strong from the summer months, reflecting a consistent rise in UV intensity that began in the spring. With January kicking off the year at a comparatively lower index of 7, the UV levels swiftly escalate, peaking in April and May at 14 before beginning a slight decline. As fall approaches, those venturing outdoors in September should take necessary precautions to protect their skin. For more detailed information about UV levels throughout the year, visit Coronado UV Index.

Maximum UV Index Levels in Coronado for September

The chart shows the monthly maximum UV Index (UVI) for Coronado 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.
JanFebMarAprMayJunJulAugSepOctNovDec710111414131313121086
Data source: Coronado 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 Coronado

September in Coronado, Mexico, offers a delightful transition from the summer months, basking in 291 hours of sunshine. This marked a dip from the summer peak but still showcases the region's abundant warmth and bright skies. As the sun shifts closer to autumn, visitors can enjoy the tail end of the vibrant summer vibes without the intense July and August heat, which recorded 355 and 348 hours, respectively. Interestingly, while sunlight hours begin to less dramatically decrease in October to 288 hours, the overall trend paints a picture of a destination where sunlight remains a cherished companion throughout the year, making Coronado a perfect spot for those seeking a blend of summer's essence and early fall charm.

Monthly Sunshine Duration in Coronado: September Highlighted

The September sunshine duration represents the total number of hours Coronado 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.
JanFebMarAprMayJunJulAugSepOctNovDec224h263h307h320h359h350h355h348h291h288h266h270h
Data source: Coronado September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Coronado During September

September in Coronado, Mexico, offers a 60% chance of sunny weather, making it a delightful month for those seeking warmth and sunlight. As the summer draws to a close, the likelihood of sunny days starts to recover from the lower percentages seen in July and August, which dipped to 51% and 48%, respectively. This upward trend continues into October, where the probability of sunshine rises to 71%. Overall, September strikes a balance, providing a decent opportunity for sunshine while hinting at the more promising weather of the coming months, perfect for enjoying the stunning beaches and outdoor activities that Coronado has to offer.

Percentage of Sunny Days in September in Coronado

The chart illustrates the percentage of sunny days in Coronado 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 Coronado experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec76%64%64%63%75%67%51%48%60%71%63%57%
Data source: Coronado September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Coronado in September

As summer gives way to autumn, September in Coronado, Mexico, marks a gradual transition in daylight duration. With 12 hours of daylight, the month shares a similar length with both March and April, indicating a slight decline from the summer peak of 13 hours seen from May to August. This shift highlights a natural rhythm, where daylight begins to wane as the region moves toward the cooler months. Following September, October will see daylight dip to 11 hours, further emphasizing the seasonal change. The overall pattern reveals a steady ebb and flow of sunlight throughout the year, inviting residents and visitors alike to enjoy the lingering warmth of early fall before winter sets in.

Average Daylight Hours in Coronado for September

The chart illustrates the variation in daylight duration in Coronado throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 39m11h 15m12h 1m12h 48m13h 27m13h 46m13h 36m13h 1m12h 16m11h 29m10h 48m10h 28m
Data source: Coronado daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Coronado

In Coronado, Mexico, September heralds a slight dip in wind speed, averaging 2.4 m/s (5 mph), mirroring the calm summer months of July and August. As the year transitions from the vibrant summer heat to the more temperate fall, this gentle breeze offers a refreshing contrast. While January through April boasts higher wind speeds, peaking at 3.8 m/s (8 mph) in March, September’s serene winds create a perfect backdrop for leisurely strolls along the coast. This trend not only enhances the tranquil atmosphere but also signals the onset of a more relaxed pace, inviting both residents and visitors to savor the beauty of Coronado’s landscape.

Average September Wind Speed in Coronado

The chart displays monthly wind speed patterns in Coronado, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.92.73.83.53.23.62.32.32.4 m/s2.72.52.5
Data source: Coronado September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Coronado Compares to Other Months

The weather in Coronado 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 Coronado and find detailed weather information for every month.

September and January present strikingly different weather conditions. In September, temperatures range from a mild 12°C (53°F) to a sweltering 36°C (97°F), with an average of 23°C (73°F). The month is characterized by high humidity at 86% and considerable rainfall, totaling 93 mm (3.7 in) over 12 days. In contrast, January experiences a much colder climate, with temperatures dipping as low as -3°C (26°F) and peaking at 28°C (84°F), averaging just 12°C (54°F). This month sees minimal precipitation of only 3 mm (0.1 in) over a single day, along with lower humidity at 75%. For more detailed information, you can check Coronado weather in January.

September weather is characterized by warm temperatures, with averages around 23°C (73°F) and a notable maximum of 36°C (97°F). It typically experiences higher humidity at 86% and significant precipitation of 93 mm (3.7 in) over about 12 days. In contrast, February brings cooler conditions with minimum temperatures dropping to -3°C (26°F) and an average of 15°C (59°F). This month is marked by much lower precipitation of just 4 mm (0.1 in) over a single day and a humidity level of 65%. For a deeper look into February’s climate, you can check out Coronado weather in February.

When comparing the weather in September and March, some notable differences emerge. September is characterized by much warmer temperatures, with averages around 23°C (73°F), and daily highs reaching up to 36°C (97°F). It also experiences higher humidity at 86% and considerable precipitation, totaling 93 mm (3.7 in) over approximately 12 days. In contrast, March offers cooler conditions, with minimum temperatures dropping to around 1°C (34°F) and an average of 19°C (66°F), while still allowing for highs that match those of September. However, March has significantly less rainfall, with only 5 mm (0.2 in) over just one rainy day, resulting in a lower humidity level of 58%. For more details on the weather in March, you can visit Coronado weather in March.

September weather tends to be significantly warmer and more humid than April. With temperatures ranging from a minimum of 12°C (53°F) to a maximum of 36°C (97°F) and an average of 23°C (73°F), September often feels hot and sticky, accompanied by 93 mm (3.7 in) of precipitation over about 12 days. In contrast, April experiences milder temperatures, with a minimum of 3°C (37°F) and a maximum of 35°C (95°F), averaging around 22°C (72°F). The month is notably drier, with only 3 mm (0.1 in) of precipitation over just one day and a humidity level of 48%. This marked difference in both humidity and rainfall makes April a more pleasant time for outdoor activities. For detailed insights into April weather, check out Coronado weather in April.

In comparing the weather between September and May, notable differences emerge. September tends to be warmer, featuring an average temperature of 23°C (73°F) with maximum highs reaching up to 36°C (97°F). However, it also brings more humidity at 86% and significantly higher precipitation, averaging 93 mm (3.7 in) over approximately 12 days. In contrast, May offers a milder experience with an average temperature of 26°C (79°F) and a maximum of 38°C (101°F), but with much less rain, totaling only 6 mm (0.2 in) across just one day. Furthermore, May enjoys lower humidity at 48%, making it a drier and more comfortable month overall. For more details about May weather, visit Coronado weather in May.

September weather is characterized by a broader temperature range, with minimums around 12°C (53°F) and highs reaching up to 36°C (97°F), while averaging 23°C (73°F). This month also sees considerable precipitation at 93 mm (3.7 in) over approximately 12 days, contributing to a high humidity level of 86%. In contrast, June offers warmer conditions, with minimum temperatures at 15°C (59°F), averages of 28°C (82°F), and maximums peaking at 39°C (103°F). Rainfall is significantly lighter in June, totaling just 24 mm (0.9 in) over only 3 days, resulting in a much lower humidity level of 54%. For more insights on June weather in this region, you can explore Coronado weather in June.

In comparison to July, September typically experiences slightly cooler temperatures, with an average of 23°C (73°F) compared to July’s 25°C (78°F). While both months can reach high maximums, September’s peak can go up to 36°C (97°F), just shy of July’s 37°C (100°F). September is also marked by higher precipitation, averaging 93 mm (3.7 in) over 12 days, in contrast to July’s 61 mm (2.4 in) over 11 days, leading to increased humidity levels in September at 86% compared to 72% in July. For more details on July weather, you can check out Coronado weather in July.

In September, temperatures range from a minimum of 12°C (53°F) to a maximum of 36°C (97°F), with an average of 23°C (73°F). This month sees increased precipitation at 93 mm (3.7 in) over 12 days, accompanied by higher humidity levels of 86%. In contrast, August tends to be slightly warmer, with temperatures fluctuating between 14°C (58°F) and 37°C (99°F), averaging around 26°C (78°F). Precipitation in August is significantly lower at 55 mm (2.2 in) over just 7 days, and humidity is also less, resting at 77%. For more detailed information, visit Coronado weather in August.

September and October exhibit notable differences in weather patterns. September tends to be warmer, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 36°C (97°F) and an average of 23°C (73°F). This month also experiences considerable rainfall, averaging 93 mm (3.7 in) over 12 rainy days, coupled with high humidity levels at 86%. In contrast, October sees a significant drop in minimum temperatures, dipping to 1°C (35°F), while the maximum remains slightly lower at 35°C (95°F). The average temperature in October is 21°C (69°F). Moreover, October is much drier, with only 28 mm (1.1 in) of precipitation over 5 days and a decrease in humidity to 82%. For more detailed insights into the October weather conditions, check Coronado weather in October.

September and November exhibit striking differences in weather patterns. September boasts a warmer climate with average temperatures reaching up to 23°C (73°F) and highs hitting 36°C (97°F), alongside significant rainfall measuring 93 mm (3.7 in) over 12 days, resulting in high humidity levels of 86%. In contrast, November brings a cooler atmosphere, with an average temperature of 16°C (62°F), and lows dipping to -5°C (24°F). The month sees much less precipitation, totaling just 12 mm (0.5 in) over only 2 days, while humidity remains similar at 85%. For more detailed insights, check out Coronado weather in November.

In September, the weather is characterized by warmer temperatures, with a minimum of 12°C (53°F) and an average of 23°C (73°F), reaching highs of 36°C (97°F). This month also experiences significant rainfall, accumulating 93 mm (3.7 in) over approximately 12 days, accompanied by high humidity levels of 86%.

In contrast, December brings much cooler conditions, featuring a minimum temperature of -12°C (11°F) and an average of 12°C (54°F), peaking at a maximum of 30°C (86°F). Precipitation drops dramatically to just 16 mm (0.6 in) over a single day, while humidity remains slightly elevated at 87%. For more details, check out Coronado weather in December.

Compare Coronado's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Coronado

As September arrives in Coronado, the weather takes on a unique character compared to other months. With warm temperatures peaking at a toasty 36°C (97°F) and a comfortable average of 23°C (73°F), this month beckons outdoor enthusiasts. However, it's also marked by increased humidity and a noticeable rise in precipitation, with about 12 days of rainfall totaling around 93 mm (3.7 in). This combination creates a lush landscape, setting September apart from the drier and hotter conditions often experienced in preceding months. For more detailed insights into Coronado's weather, feel free to explore Coronado Climate.