September Weather in El Penasco, Mexico

Last updated: April 22, 2025

September in El Penasco, Mexico brings a pleasant climate characterized by a maximum temperature of 30°C (87°F) and an average of 19°C (66°F), making it a comfortable escape for visitors. However, nights can get cooler, with minimum temperatures dipping to 9°C (49°F). This month also sees significant rainfall, with 101 mm (4.0 in) spread over approximately 15 days, contributing to the region's lush landscape. Coupled with a high humidity level of 81%, the air feels balmy, enriching the overall experience of this coastal gem.

September Temperature in El Penasco

In September, El Penasco experiences a delightful transition in weather, with temperatures ranging from a mild 9°C (49°F) at night to a comfortable 30°C (87°F) during the day. As summer wanes, the average temperature settles around 19°C (66°F), making it perfect for outdoor adventures and beach relaxation. This month stands out with a gentle ebb in maximum temperatures compared to the peak summer heat, offering a more pleasant climate for visitors. The gradual drop in nighttime lows also hints at the upcoming autumn, while still retaining enough warmth for enjoyable evenings by the sea. September truly strikes a balance, inviting both sun-seekers and those looking for a cooler retreat to relish in its pleasant atmosphere.

September Weather in El Penasco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in El Penasco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec555964687169686866635855
Data source: Temperature data for El Penasco generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in El Penasco

In September, El Penasco experiences a significant spike in precipitation, receiving 101 mm (4.0 in) of rain over 15 days. This month marks one of the wettest in the region, closely following the heavy rains of June and July. The trend shows a distinct increase as the summer heat gives way to more moisture-laden air, leading to frequent rainfall that plays a crucial role in replenishing local water sources. Compared to August's 59 mm (2.3 in), September not only brings a substantial increase in precipitation but also expands the number of rainy days, indicating a shift toward more consistent wet weather. This pattern highlights the transitional nature of September as it bridges the intense summer downpours with the drier autumn months ahead.

September Precipitation Trends in El Penasco

The chart displays monthly precipitation patterns in El Penasco, 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.
JanFebMarAprMayJunJulAugSepOctNovDec911131450104916010162199
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in El Penasco

In September, El Penasco, Mexico experiences a noticeable rise in humidity, reaching 81%, the highest level since June. This increase marks a shift from the milder summer months of July and August, which recorded 67% and 64% humidity, respectively. The transition into autumn brings a wave of moisture, setting the stage for even higher levels in the following months, particularly in October and November when humidity peaks at 85% and 87%. Overall, September serves as a pivotal link, where the summer's drier air begins to succumb to the approach of the wetter fall season, inviting a palpable change in the atmosphere.

September Average Humidity in El Penasco

This chart illustrates the average monthly humidity levels in El Penasco, 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%69%65%64%75%78%67%64%82%86%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in El Penasco

In September, El Penasco experiences a UV Index of 13, placing it within the extreme exposure category with a brisk burn time of just 10 minutes. This trend of high UV exposure continues, following a summer where the index peaked at 15 in May and settled at 14 from June through August. As the months transition from the scorching summer to the cooler fall, the UV levels remain significant, creating a consistent need for sun protection throughout the year. Visitors and residents alike should stay vigilant, adjusting their sun safety measures to this high UV environment. For more details on the UV Index trends, visit El Penasco UV Index.

Maximum UV Index Levels in El Penasco for September

The chart shows the monthly maximum UV Index (UVI) for El Penasco 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.
JanFebMarAprMayJunJulAugSepOctNovDec8111414151414141312108
Data source: El Penasco 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 El Penasco

September in El Penasco, Mexico, brings a delightful transition as summer begins to wane, offering 291 hours of sunshine. While this marks a noticeable dip from the sun-drenched months of May and August, which bask in over 340 hours of bright skies, September still shines brighter than the earlier months of the year. This shift signals the approaching autumn, inviting visitors to enjoy pleasant temperatures and golden sunsets. As the days shorten and the sun dips earlier, the scenic beauty of El Penasco remains captivating, making it an ideal time for relaxation and exploration in this coastal paradise.

Monthly Sunshine Duration in El Penasco: September Highlighted

The September sunshine duration represents the total number of hours El Penasco 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.
JanFebMarAprMayJunJulAugSepOctNovDec222h262h309h322h343h327h327h331h291h282h269h279h
Data source: El Penasco September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in El Penasco During September

In El Penasco, Mexico, the likelihood of sunny weather in September takes a notable dip, with only a 24% chance of sunshine. This marks a significant decline from the higher probabilities seen in earlier months like February (78%) and March (65%). As summer winds down, particularly in June and July, the chances of precipitation increase, leading to cloudier skies and less sunny days. September, with its lower sunshine likelihood, signals a transitional period, hinting that while sun seekers might be met with less favorable weather, the vibrant atmosphere remains steeped in warmth and local charm.

Percentage of Sunny Days in September in El Penasco

The chart illustrates the percentage of sunny days in El Penasco 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 El Penasco experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec51%79%65%59%54%29%25%38%24%40%57%68%
Data source: El Penasco September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in El Penasco in September

In El Penasco, Mexico, the rhythm of daylight undergoes a gentle transition as the year progresses. Beginning with 10 hours of daylight in January, the days gradually lengthen, peaking at 13 hours during the vibrant months of May through August. As summer wanes, September holds steady with a delightful 12 hours of sunlight, providing the perfect balance between warmth and coolness as the season shifts. Following this, October and November see a gradual decline back to 11 hours, reminiscent of the shorter days in winter. This cyclical pattern not only marks the change of seasons but also offers residents and visitors alike a chance to savor the abundant daylight throughout the year.

Average Daylight Hours in El Penasco for September

The chart illustrates the variation in daylight duration in El Penasco throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 55m11h 24m12h 1m12h 40m13h 11m13h 27m13h 19m12h 50m12h 14m11h 35m11h 3m10h 47m
Data source: El Penasco daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in El Penasco

As September settles over El Peñasco, Mexico, the gentle caress of the wind reaches its seasonal low, averaging 2.3 m/s (5 mph). This soft breeze is a calm contrast to the summer months, where August boasts a lively 3.4 m/s (8 mph), invigorating the coastal landscape. The trend shows a gradual decline from the spring highs, where consistent winds of around 3.3 m/s (7 mph) were prevalent. July marks a turning point, with winds starting to ease, leading into the relaxed atmosphere of fall. This subtle shift invites a serene ambiance, perfect for leisurely beach strolls and absorbing the tranquil beauty of the seaside horizon. As the year progresses, the winds remain gentle, whispering tales of the changing seasons and providing a peaceful backdrop to life in this picturesque locale.

Average September Wind Speed in El Penasco

The chart displays monthly wind speed patterns in El Penasco, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.63.23.33.33.12.92.73.42.3 m/s2.32.42.2
Data source: El Penasco September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in El Penasco Compares to Other Months

The weather in El Penasco 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 El Penasco and find detailed weather information for every month.

September and January present stark contrasts in weather. In September, temperatures range from a mild 9°C (49°F) at night to a warm 30°C (87°F) during the day, with an average of 19°C (66°F). The month is also characterized by significant precipitation, totaling 101 mm (4.0 in) over approximately 15 days, and higher humidity levels at 81%. In contrast, January experiences cooler temperatures, with lows dipping to -1°C (31°F) and daytime highs averaging 28°C (82°F). This month sees minimal rainfall, with only 9 mm (0.3 in) recorded over just 2 days, and slightly lower humidity at 75%. For a closer look at January weather specifics, you can check El Penasco weather in January.

In comparing the weather of September and February, we see notable differences in temperature and precipitation. September typically experiences a range of temperatures from a cool 9°C (49°F) at night to a warm average of 19°C (66°F) and can peak at 30°C (87°F), accompanied by significant rainfall of 101 mm (4.0 in) over about 15 days, resulting in a humidity level of 81%. In contrast, February presents a cooler climate with minimum temperatures dropping to 0°C (33°F), an average of 15°C (60°F), and a high reaching 32°C (91°F). Notably, February sees much less precipitation, with only 11 mm (0.4 in) recorded over just 2 days and lower humidity at 69%. For more detailed weather insights, you can visit El Penasco weather in February.

September and March showcase distinct weather patterns, reflecting the transition between the warm summer months and the onset of spring. In September, temperatures range from a cooler minimum of 9°C (49°F) to a warmer maximum of 30°C (87°F), with an average of 19°C (66°F). The month experiences significant rainfall, totaling 101 mm (4.0 in) over approximately 15 days, contributing to a high humidity level of 81%. In contrast, March displays milder conditions with temperatures starting at a chilly 0°C (33°F), peaking at 33°C (92°F), and an average of 18°C (64°F). Precipitation is notably low in March, amounting to only 13 mm (0.5 in) over just 3 days, and humidity drops to a more comfortable 65%. For more detailed insights into March weather, you can visit El Penasco weather in March.

When comparing the weather in September and April, several notable differences emerge. September experiences a broader temperature range, with minimums of 9°C (49°F) and maximums reaching up to 30°C (87°F), while April has slightly cooler minimums at 6°C (44°F) but warmer maximums that can spike to 33°C (92°F). In terms of precipitation, September is particularly rainy, receiving 101 mm (4.0 in) over 15 days, whereas April sees significantly less rain, accumulating only 14 mm (0.5 in) across just 4 days. Additionally, September has a much higher humidity level at 81%, compared to April’s 64%. For more detailed insights about the weather in April, you can visit El Penasco weather in April.

When comparing the weather in September and May, it is evident that May tends to be warmer and drier. In September, the average temperature reaches a comfortable 19°C (66°F), with maximums climbing to 30°C (87°F), while relative humidity is higher at 81%. Conversely, May boasts a warmer average temperature of 22°C (71°F) and can peak at a scorching 35°C (95°F), but with significantly less rainfall—only 50 mm (2.0 in) over 8 days compared to September's 101 mm (4.0 in) over 15 days. For more insights into May's climate, check out El Penasco weather in May.

When comparing the weather in September and June, we notice some key differences. September sees a slightly lower average temperature, ranging from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), while June offers warmer conditions with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 34°C (93°F). Both months experience similar levels of precipitation, with September totaling 101 mm (4.0 in) over 15 days and June reaching 104 mm (4.1 in) over 14 days. Humidity levels are also quite comparable, though September is a bit more humid at 81%, compared to 78% in June. For more detailed insights into weather patterns, check out El Penasco weather in June.

When comparing the weather in September and July, September tends to be a bit cooler with an average temperature of 19°C (66°F) compared to July's average of 20°C (68°F). The maximum temperatures are quite similar, peaking at 30°C (87°F) in September and 31°C (88°F) in July. However, September experiences slightly more rainfall, with 101 mm (4.0 in) over 15 days, whereas July has 91 mm (3.6 in) spread across just 12 days. Additionally, the humidity is higher in September at 81%, compared to July's 67%. For more detailed information on July weather, you can refer to El Penasco weather in July.

In comparing the weather between August and September, we see notable differences in both temperature and precipitation. August tends to be slightly warmer, with minimum temperatures around 12°C (53°F) and maximums reaching 31°C (88°F), while September experiences cooler minimums of 9°C (49°F) and an average maximum of 30°C (87°F). Additionally, September is wetter, receiving 101 mm (4.0 in) of precipitation over 15 days, compared to August's 59 mm (2.3 in) over just 8 days. The humidity is also higher in September at 81%, compared to 64% in August, making it feel more humid and sticky. For more detailed information, you can check El Penasco weather in August.

September weather tends to be warmer and more humid than October, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 30°C (87°F) and an average of 19°C (66°F). It experiences higher precipitation, totaling 101 mm (4.0 in) over 15 days. In contrast, October features cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 28°C (83°F), averaging 17°C (63°F). The month is also drier, with only 62 mm (2.4 in) of precipitation over 10 days, but slightly higher humidity at 85%. For more detailed information, you can refer to El Penasco weather in October.

September and November exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), with an average of 19°C (66°F). The month sees significant rainfall, totaling 101 mm (4.0 in) over 15 days, complemented by high humidity levels at 81%. In contrast, November brings cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 29°C (84°F), averaging 15°C (59°F). Interestingly, November experiences much less precipitation, amounting to only 19 mm (0.7 in) over just 3 days, while humidity rises slightly to 87%. For a detailed look at the weather conditions during November, you can check El Penasco weather in November.

September and December showcase stark contrasts in weather. In September, temperatures range from a mild 9°C (49°F) at night to a warm 30°C (87°F) during the day, accompanied by significant precipitation of 101 mm (4.0 in) over 15 days. This month typically brings a high humidity level of 81%, creating a sense of warmth and occasional rain. In contrast, December experiences cooler temperatures, with a minimum of -4°C (25°F) and an average of 13°C (55°F), peaking at 27°C (81°F). Notably, December sees much less rainfall, with only 9 mm (0.3 in) on just one day, and humidity rises slightly to 87%. For a more detailed look at December weather, check out El Penasco weather in December.

Compare El Penasco's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in El Penasco

As September rolls in, El Penasco experiences a notable shift in weather, characterized by increased humidity and frequent rain showers that set it apart from the drier months of summer. While daytime temperatures remain pleasantly warm, the cooler nights offer a refreshing contrast. However, the substantial precipitation can catch visitors off guard, as the area receives about half its monthly rain during this period, making it essential to be prepared for wet weather. This combination of mild temperatures and tropical-like conditions creates a unique atmosphere, perfect for those looking to enjoy the lush landscape. For a more detailed look at how these changes affect the region, check out the complete El Penasco Climate overview.