September Weather in Cajamarca, Peru

Last updated: August 27, 2025

In Cajamarca, Peru, September experiences a vibrant interplay of weather conditions that define the month. With a maximum temperature reaching 23°C (73°F) and an average of 12°C (54°F), the days are pleasantly warm, while cooler nights bring the minimum down to 5°C (42°F). This period also witnesses significant precipitation, totaling 154 mm (6.1 in) over approximately 18 days, contributing to a humidity level of 42% that adds a refreshing feel to the air. Whether you're exploring the lush landscapes or enjoying local culture, September's weather provides a unique backdrop for unforgettable experiences.

September Temperature in Cajamarca

In Cajamarca, Peru, September sees a slight warming trend as the temperatures begin to shift towards the more pleasant conditions of spring. With minimums around 5°C (42°F) and maximums reaching 23°C (73°F), the month enjoys a comfortable average of 12°C (54°F). This stable temperature range, consistent with the preceding months, indicates that the cool, crisp air characteristic of the region persists. As September unfolds, the gradual rise in daytime warmth hints at the transition to the warmer months ahead, making it an inviting time to explore the rich culture and breathtaking landscapes Cajamarca has to offer.

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

The chart illustrates September temperature patterns in Cajamarca, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cajamarca, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec545453545454545454545454
Data source: Temperature data for Cajamarca 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 Cajamarca

In September, Cajamarca, Peru experiences a notable shift in precipitation patterns, with 154 mm (6.1 in) of rainfall spread over 18 days. This month marks a transitional period as the dry season begins to give way to the moist warmth of spring, reflecting a slight increase compared to the preceding dry months of July and August, which recorded only 43 mm and 47 mm respectively. While September's precipitation is still much lower than the peak seen in March, when the region received a substantial 599 mm (23.6 in) over 29 days, it sets the stage for the heavier rains that October and November generally bring. As such, September serves as a crucial bridge in Cajamarca's annual climate cycle, easing the tranquil dry spell into the more vibrant and verdant months ahead.

September Precipitation Trends in Cajamarca

The chart displays monthly precipitation patterns in Cajamarca, 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. In Cajamarca, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec304392599349189704348154299290413
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Cajamarca

In Cajamarca, Peru, September marks a subtle transition in humidity levels as the dry season begins to wane. With humidity at 42%, this month continues the trend of declining moisture that started in July, where levels plummeted to their lowest at 44% and August saw an even drier average of 38%. While September remains relatively dry compared to earlier months, such as the peak in March at 88%, it also foreshadows a gradual rise in humidity in the following months, leading into October's 58%. This ebb and flow of moisture not only influences the local climate but also affects the vibrant landscapes and agriculture typical of the region throughout the year.

September Average Humidity in Cajamarca

This chart illustrates the average monthly humidity levels in Cajamarca, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Cajamarca is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%88%85%78%62%44%38%42%58%69%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cajamarca

In September, Cajamarca experiences a UV Index of 17, maintaining its spot in the extreme exposure category. This marks a notable increase from the lower levels observed in the preceding months of June and July, which boasted indices of 13 and 14, respectively. As autumn approaches, residents and visitors alike should remain vigilant, as the consistent burn time of just 10 minutes emphasizes the need for protection against harmful UV rays. Following the trend, October is expected to see an even higher UV Index of 18, indicating that the intensity of sunlight continues to rise. For more insights and safety tips on UV exposure, check out Cajamarca UV Index.

Maximum UV Index Levels in Cajamarca for September

The chart shows the monthly maximum UV Index (UVI) for Cajamarca 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. In September, the maximum UV index in Cajamarca typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec171819181513141417181616
Data source: Cajamarca 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 Cajamarca

In Cajamarca, Peru, September shines with an impressive 311 hours of sunshine, marking a splendid transition between the dry and rainy seasons. This month continues a trend of abundant sunlight, following the peak sunshine months of July and August, which enjoy 333 and 335 hours, respectively. The overall annual progression shows a gradual increase in sunlit hours from the start of the year, culminating in May's 314 hours. As the year wanes, the sunshine hours begin to taper off, with October bringing 285 hours. September serves as a picturesque bridge, inviting both locals and travelers to bask in the vibrant warmth and golden hues before the cooler months ahead.

Monthly Sunshine Duration in Cajamarca: September Highlighted

The September sunshine duration represents the total number of hours Cajamarca 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.
JanFebMarAprMayJunJulAugSepOctNovDec215h238h227h263h314h314h333h335h311h285h266h269h
Data source: Cajamarca September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Cajamarca During September

In Cajamarca, Peru, September marks a transitional moment in the weather pattern, with a 39% chance of sunny days. While this figure indicates a fair likelihood of sunshine, it reflects a notable dip from the peak sunny months of July and August, which enjoy chances of 69% and 48%, respectively. In contrast to the early part of the year, when the prospects of sun are particularly low—hovering around 10% to 16%—September offers a refreshing reprieve as the dry season makes its presence felt. As the region heads into the October rainy season, September stands out as one of the last months to embrace a balance of sunshine and cloud, making it an ideal time for outdoor activities before the skies turn grey again.

Percentage of Sunny Days in September in Cajamarca

The chart illustrates the percentage of sunny days in Cajamarca 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 Cajamarca experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec10%13%8%16%44%39%69%48%39%17%13%16%
Data source: Cajamarca September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Cajamarca in September

As autumn approaches in Cajamarca, Peru, September marks a notable transition in daylight duration. Throughout the year, the region enjoys a consistent 12 hours of daylight during the summer months of January, February, and March. However, as the dry season sets in, daylight hours dip to 11 hours from April through August, creating a subtle rhythm in the daily cycle. In September, the pattern shifts again, restoring the 12-hour daylight balance, which continues into October and beyond. This rhythmic oscillation in daylight not only enhances the natural beauty of Cajamarca but also fosters a vibrant atmosphere for outdoor activities and cultural celebrations.

Average Daylight Hours in Cajamarca for September

The chart illustrates the variation in daylight duration in Cajamarca throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 28m12h 18m12h 7m11h 55m11h 46m11h 42m11h 44m11h 52m12h 3m12h 15m12h 25m12h 31m
Data source: Cajamarca daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Cajamarca

As September ushers in the early hints of spring in Cajamarca, Peru, the wind picks up just a notch, averaging a gentle 1.4 m/s (3 mph). This moderate breeze marks a slight increase from the previous month and continues the trend observed since July when winds began to strengthen, peaking at 1.7 m/s (4 mph). The steady, soft whispers of wind throughout the year create an inviting atmosphere for both locals and visitors, enhancing the region's charm. With September's consistent conditions, it’s an ideal time to bask in the fresh air and enjoy the scenic beauty that this Andean city has to offer.

Average September Wind Speed in Cajamarca

The chart displays monthly wind speed patterns in Cajamarca, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.11.31.11.11.31.21.71.51.4 m/s1.11.21.2
Data source: Cajamarca September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Cajamarca Compares to Other Months

Weather in Cajamarca varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Cajamarca, focusing on differences in temperature, rainfall, humidity, and UV levels.

In September, the weather is generally milder, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 23°C (73°F) and an average of 12°C (54°F). The month experiences significant rainfall, totaling 154 mm (6.1 in) over about 18 days, with humidity levels around 42%. In contrast, January sees slightly warmer temperatures, with a minimum of 6°C (42°F), an average of 12°C (54°F), and a maximum of 20°C (69°F). However, it is much wetter, with precipitation reaching 304 mm (12.0 in) across 24 days, resulting in a much higher humidity level of 83%. For more details, you can check Cajamarca weather in January.

September and February present contrasting weather conditions despite similar average temperatures of 12°C (54°F). In September, temperatures range from a minimum of 5°C (42°F) to a maximum of 23°C (73°F), with relatively low humidity at 42% and 154 mm (6.1 in) of precipitation over 18 days. In contrast, February experiences a slightly cooler minimum temperature of 3°C (38°F) and a maximum of 21°C (70°F), but significant humidity rises to 81%, accompanied by a much higher precipitation total of 392 mm (15.4 in) over 26 days. For more details, check out Cajamarca weather in February.

Comparing the weather between September and March reveals some notable differences. In September, temperatures range from a minimum of 5°C (42°F) to a maximum of 23°C (73°F), with an average temperature of 12°C (54°F). The month experiences moderate precipitation of 154 mm (6.1 in) over 18 days, and humidity levels are relatively low at 42%. In contrast, March has slightly milder temperatures, with a minimum of 4°C (40°F) and a maximum of 21°C (69°F), averaging around 12°C (53°F). However, it is significantly wetter, with precipitation reaching 599 mm (23.6 in) over 29 days, leading to a much higher humidity level of 88%. For more details on March's weather, visit Cajamarca weather in March.

September and April present quite different weather patterns. In September, temperatures range from a minimum of 5°C (42°F) to a maximum of 23°C (73°F), with an average of 12°C (54°F). The month sees around 154 mm (6.1 in) of rainfall spread across about 18 days, with relatively low humidity at 42%. In contrast, April experiences slightly warmer temperatures, with a minimum of 6°C (43°F) and a maximum of 20°C (69°F), while maintaining the same average of 12°C (54°F). However, it is significantly wetter, with approximately 348 mm (13.7 in) of precipitation over 27 days and noticeably higher humidity at 85%. For more insights on April's weather specifics, visit Cajamarca weather in April.

In September, the weather features a mild temperature range with a minimum of 5°C (42°F) and a maximum of 23°C (73°F), averaging around 12°C (54°F). The month experiences moderate rainfall, totaling 154 mm (6.1 in) over approximately 18 days and a lower humidity of 42%. In contrast, May presents a somewhat cooler maximum temperature of 21°C (70°F) while maintaining the same minimum temperature of 5°C (41°F) and an average of 12°C (54°F). However, May sees increased precipitation, with 188 mm (7.4 in) spread across 24 days and a significantly higher humidity level of 78%. For a deeper understanding of this month’s climate, refer to Cajamarca weather in May.

In September, the weather is characterized by a wider temperature range, with minimums dipping to 5°C (42°F) and maximums reaching 23°C (73°F). In contrast, June has slightly cooler maximum temperatures, peaking at 21°C (71°F), while the minimum is just a degree lower at 4°C (39°F). Notably, September experiences much higher precipitation, totaling 154 mm (6.1 in) over 18 days, compared to June's 70 mm (2.8 in) across 12 days. Additionally, humidity levels in June are higher at 62%, while September's humidity is comparatively lower at 42%. For more details on June weather, you can check Cajamarca weather in June.

In comparing the weather between September and July, we observe a few notable differences. September experiences slightly warmer temperatures, with highs reaching up to 23°C (73°F), while July's maximum temperature is a bit cooler at 22°C (71°F). Both months share a similar average temperature of around 12°C (54°F). However, September is significantly wetter, with 154 mm (6.1 in) of precipitation over 18 days compared to July's much drier 43 mm (1.7 in) over just 8 days. Humidity levels are comparable, with September at 42% and July slightly higher at 44%. For more information about July weather, check out Cajamarca weather in July.

In comparing the weather between September and August, we see some notable differences. September experiences slightly cooler temperatures, with a minimum of 5°C (42°F), while August starts off a bit chillier at a minimum of 3°C (37°F). Both months have an average temperature of around 12°C (54°F), but August's maximum of 23°C (74°F) is marginally higher than September's max of 23°C (73°F).

One of the more significant distinctions is the precipitation; September sees a substantial increase in rainfall, recording 154 mm (6.1 in) over 18 days, compared to August's much lighter 47 mm (1.9 in) over just 9 days. This results in September being noticeably wetter and more humid, with humidity levels at 42%, while August has a slightly lower humidity of 38%. For a detailed look at the weather in August, you can visit Cajamarca weather in August.

September and October present noteworthy contrasts in weather patterns. In September, temperatures range from a minimum of 5°C (42°F) to a maximum of 23°C (73°F), with an average of 12°C (54°F). The month sees precipitation levels around 154 mm (6.1 in) over 18 days, contributing to a relatively dry humidity of 42%. In contrast, October experiences a slight drop in maximum temperatures, with highs reaching 21°C (71°F) and a minimal drop in lows to 4°C (40°F), while maintaining the same average temperature of 12°C (54°F). However, October is significantly wetter, recording 299 mm (11.8 in) of rainfall over 26 days, resulting in higher humidity levels of 58%. For a closer look at October's weather, you can visit Cajamarca weather in October.

September and November present distinct weather patterns. In September, temperatures range from a minimum of 5°C (42°F) to a maximum of 23°C (73°F), with an average of 12°C (54°F). This month experiences significant rainfall, with 154 mm (6.1 in) over 18 days and relatively low humidity at 42%. In contrast, November sees cooler minimum temperatures dropping to 0°C (33°F), while the maximums are slightly lower, peaking at 21°C (70°F) with the same average of 12°C (54°F). Precipitation increases considerably to 290 mm (11.4 in) across 23 days, accompanied by a rise in humidity to 69%. This shift signifies a transition into the wetter season, highlighting the importance of preparing for increased rainfall. For more specific information, check out Cajamarca weather in November.

September and December in Cajamarca present contrasting weather patterns. In September, temperatures range from a cooler minimum of 5°C (42°F) to a comfortable maximum of 23°C (73°F), with an average of 12°C (54°F). The month experiences moderate rainfall of 154 mm (6.1 in) over 18 days and a low humidity of 42%. In contrast, December sees slightly milder temperatures with a minimum of 3°C (38°F) and a maximum of 21°C (70°F), while the average remains the same at 12°C (54°F). However, this month is significantly wetter, receiving 413 mm (16.2 in) of precipitation over 26 days, and the humidity rises dramatically to 82%. For more detailed information, you can check Cajamarca weather in December.

Compare Cajamarca's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Cajamarca

As September rolls into Cajamarca, the weather presents a charming mixture of warmth and coolness that contrasts with the extremes of other months. While maximum temperatures can reach a pleasant 23°C (73°F), the average cools down to roughly 12°C (54°F), providing relief from the summer heat. This month also welcomes a notable amount of rainfall, with 154 mm (6.1 in) falling over around 18 days, enriching the lush landscapes that define the region. The humidity hovers around 42%, making the air feel fresh and invigorating. For those curious about Cajamarca’s unique climate and its seasonal variations, more information can be found at Cajamarca Climate.