Last updated: August 27, 2025
September in Machu Picchu, Peru, offers a mild mountain climate, with temperatures ranging from a maximum of 17°C (62°F) to a chilly minimum of 0°C (33°F). The average temperature hovers around 8°C (47°F), perfect for adventurous exploration. However, visitors should brace for frequent rainfall, accumulating to 102 mm (4.0 in) over the month across 28 days, creating a lush and vibrant landscape. With humidity at 52%, the air is crisp yet refreshing, making September an intriguing time to experience the ancient wonders of this iconic site.
In September, Machu Picchu experiences a gradual warming trend, with temperatures ranging from a minimum of 0°C (33°F) to a comfortable maximum of 17°C (62°F). The average temperature sits at 8°C (47°F), marking a slight increase from the chillier months of winter preceding it. This transition into spring sees the days growing milder and more inviting, making it an excellent time for exploration. As the region shakes off the cold, visitors can anticipate pleasant weather that enhances the awe-inspiring experience of this ancient citadel, nestled amidst the lush Peruvian landscape.
In September, Machupicchu experiences a notable increase in precipitation, recording 102 mm (4.0 in) over 28 days of rainfall. This month marks a transition period as the dry season wanes, with the lush landscapes beginning to flourish again following the drier months of June and July, which only saw 44 mm and 43 mm, respectively. Compared to the previous month, where a relatively modest 62 mm fell, September sets the stage for a dramatic uptick in precipitation leading into October's 174 mm (6.9 in). As the rainy season approaches, the frequent showers contribute to the region's vibrant foliage, enhancing the breathtaking scenery that makes Machupicchu a world-renowned destination.
September in Machu Picchu brings a notable shift towards increased humidity, settling at 52% after the drier months of July and August when levels dipped to 54% and 44% respectively. This slight rise signals the transition from the dry season back towards the lush vibrancy of the Andean landscape, preparing for the upcoming rainy months ahead. As the year progresses, humidity levels increase again in October to 65% and continue to climb through the end of the year. Visitors in September can expect a refreshing change, where the air begins to feel a bit more tropical, enhancing the mystical atmosphere of this iconic archaeological site.
In September, Machupicchu, Peru, experiences a UV Index of 16, indicating an extreme exposure category with a consistent burn time of just 10 minutes. This slight increase from August's UV Index of 14 reflects the region's overall trend, where high UV levels are a hallmark throughout the year. Notably, the UV Index remains elevated from January to April, peaking at 19 during the early months. As the year progresses, there’s an evident fluctuation, yet the exposure remains critical. Travelers should be vigilant and take necessary precautions during their adventures in this stunning archaeological wonder. For more detailed information, you can check the Machupicchu UV Index.
UV Risk Categories
September in Machupicchu, Peru continues the tradition of vibrant sunlight, showcasing 319 hours of radiant daylight, making it one of the sunniest months of the year. Following the peak of summer in August, which boasted an impressive 338 hours of sunshine, this slight dip still maintains a remarkable brightness relative to earlier months. The trend of increasing sunlight from January to August sets the stage for a warm and inviting atmosphere, perfectly complementing the breathtaking Incan ruins and lush landscapes. As the year transitions into fall, October sees a gradual decrease to 306 hours, yet the lingering sunshine of September ensures that visitors can soak in the majestic beauty of this iconic destination, framed by the golden hues of early spring.
September in Machu Picchu welcomes a moderate 18% chance of sunny weather, offering a brief respite from the gloom of the preceding months. After a gradual increase from April’s 14% to the summer highs of 39% in July, September marks a notable dip in sunshine, foreshadowing the return of cloudier conditions in October. Despite this decline, the month's likelihood of sun remains relatively favorable compared to the earlier months of the year, where sunshine is quite elusive, making it a strategic time for visitors hoping to catch glimpses of the mystical ruins bathed in sunlight. Whether you’re trekking the Inca Trail or exploring the citadel itself, September presents a balanced mix of mild weather and increased chances of clearer skies.
As the seasons transition in Machu Picchu, September marks a return to longer days, offering 12 hours of daylight to enthusiasts keen on exploring this ancient wonder. Following several months of consistent 11 hours of daylight from April through August, the gradual increase creates a sense of rejuvenation, ideal for experiencing the stunning vistas and intricate architecture. With daylight lingering longer, visitors can take advantage of the enchanting landscapes and vibrant culture, all while embracing the gentle warmth that early spring brings to the Andes. This rhythmic pattern of daylight hours, punctuated by refreshing shifts, underscores the beauty of Machu Picchu throughout the year.
As September unfolds in Machupicchu, the average wind speed remains a gentle 1.1 m/s (2 mph), mirroring the breezy conditions of the previous months. This steady flow of air, consistent since August, adds a refreshing touch to the already breathtaking scenery, inviting travelers to explore the lush terrains without the discomfort of harsh winds. Interestingly, the wind tends to slightly decrease as the year progresses, with the calmest months occurring in late fall and early winter. Visitors during September can relish in this mild breeze, perfectly complementing their experience amidst the ancient ruins as nature softly whispers its secrets.
Weather in Machupicchu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Machupicchu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between September and January, we can see notable differences in temperature and precipitation. September experiences cooler temperatures with a minimum of 0°C (33°F) and an average of 8°C (47°F), while January is slightly warmer, starting at a minimum of 3°C (38°F) and averaging 9°C (49°F). Precipitation is significantly higher in January, with 257 mm (10.1 in) of rain over 26 days, compared to September's 102 mm (4.0 in) across 28 days. Additionally, January is characterized by much higher humidity at 93%, in contrast to September's 52%. For more detailed insights into the climate during January, you can check Machupicchu weather in January.
When comparing the weather in September and February, one can observe distinct differences in temperature and precipitation patterns. September typically features a cooler range, with minimum temperatures dipping to 0°C (33°F) and an average of 8°C (47°F). In contrast, February starts off warmer, with minimum temperatures around 4°C (39°F) and an average of 9°C (49°F).
Precipitation levels are significantly higher in February, totaling 292 mm (11.5 in) over 28 days, compared to September's 102 mm (4.0 in). Additionally, February has notably higher humidity, reaching 92%, whereas September sits at a more comfortable 52%. These differences can greatly impact outdoor activities and travel plans during these months. For those interested in specific conditions in the region, you can find more information at Machupicchu weather in February.
When comparing the weather in September and March, several notable differences emerge. In September, temperatures range from a minimum of 0°C (33°F) to a maximum of 17°C (62°F), with an average of 8°C (47°F). This month experiences relatively moderate precipitation of 102 mm (4.0 in) spread over 28 days, along with a comfortable humidity level of 52%. In contrast, March sees slightly milder temperatures with a minimum of 3°C (38°F) and a maximum of 17°C (63°F), averaging around 9°C (49°F). However, it is significantly wetter, with precipitation reaching 286 mm (11.3 in) over 31 days and humidity rising to 92%. For more detailed information about weather conditions in March, check out Machupicchu weather in March.
September and April exhibit notable differences in weather characteristics. September typically sees temperatures ranging from a chilly 0°C (33°F) to a comfortable 17°C (62°F), with an average temperature of 8°C (47°F). In contrast, April's temperatures are slightly milder, with minimums around 2°C (36°F) and maximums reaching 17°C (63°F), averaging 9°C (49°F).
Furthermore, April tends to have significantly higher precipitation, with 160 mm (6.3 in) recorded over 29 days, compared to September's 102 mm (4.0 in) over 28 days. The humidity also fluctuates, with April experiencing much higher levels at 90%, while September maintains a more moderate 52%. These variations highlight the transition from the tail end of winter in September to the onset of spring in April. For more insights on the weather during this time, you can refer to Machupicchu weather in April.
In comparing the weather of September and May, both months exhibit a similar average temperature of around 8°C (47°F), but their overall conditions differ. September tends to be cooler with a maximum temperature of 17°C (62°F), while May has a slightly lower maximum of 16°C (62°F). Precipitation patterns also vary; September experiences more rain, totaling 102 mm (4.0 in) over 28 days, compared to May's 69 mm (2.7 in) over 22 days. Moreover, humidity is significantly higher in May at 85%, contrasted with September’s 52%. For further details on May weather, check out Machupicchu weather in May.
In comparing the weather between September and June, both months experience a similar minimum temperature of around 0°C (32°F to 33°F). However, September tends to be slightly warmer overall, with an average temperature of 8°C (47°F) and a maximum of 17°C (62°F), while June's average is nearly the same at 8°C (46°F) and a slightly lower maximum of 16°C (61°F). Precipitation levels also differ significantly: September sees a substantial 102 mm (4.0 in) of rain over 28 days, while June has considerably less rainfall at 44 mm (1.7 in) during just 14 days. Additionally, June is marked by higher humidity levels at 70%, compared to September's 52%. For more detailed insights, you can check Machupicchu weather in June.
In comparing the weather between September and July, we see distinct differences. September experiences slightly higher temperatures, with average values around 8°C (47°F) and a maximum of 17°C (62°F), while July has a similar maximum of 17°C (64°F) but a lower average of 7°C (46°F). Interestingly, July has a lower minimum temperature of -1°C (30°F) compared to September's 0°C (33°F). Precipitation is notably higher in September, with 102 mm (4.0 in) spread over 28 days, compared to July's 43 mm (1.7 in) over just 12 days. Additionally, humidity levels are fairly similar, with September at 52% and July at 54%. For those interested in the specifics of weather in that region, you can check Machupicchu weather in July.
In comparing the weather between August and September, September presents a noticeable increase in average temperatures, with a minimum of 0°C and an average of 8°C, compared to August’s minimum of -1°C and average of 7°C. Both months feature similar maximum temperatures, with both peaking around 17°C (62°F) in September and 16°C (62°F) in August. Precipitation is significantly higher in September, with 102 mm (4.0 in) over 28 days, while August sees only 62 mm (2.5 in) across 18 days, leading to greater humidity in September at 52% compared to August’s 44%. For further details on specific weather conditions, visit Machupicchu weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 0°C (33°F) to a maximum of 17°C (62°F), with an average temperature of 8°C (47°F). The month sees 102 mm (4.0 in) of precipitation spread over 28 days, and humidity levels sit at 52%. In contrast, October brings slightly warmer temperatures, with a minimum of 2°C (36°F), an average of 9°C (48°F), and a maximum of 18°C (65°F). However, it also comes with increased precipitation, totaling 174 mm (6.9 in) across 30 days, alongside a rise in humidity to 65%. This transition highlights a trend toward cooler, wetter, and more humid conditions as autumn progresses. For more specific insights into October weather, see Machupicchu weather in October.
September and November exhibit notable differences in weather patterns. September generally has cooler temperatures, with a minimum of 0°C (33°F) and an average of 8°C (47°F), while November sees slightly warmer temperatures, starting at a minimum of 4°C (39°F) and averaging 10°C (50°F). Precipitation levels also vary significantly; September experiences 102 mm (4.0 in) of rain over 28 days, whereas November is much wetter, receiving 228 mm (9.0 in) across 30 days, contributing to a higher humidity level of 81% compared to September's 52%. For more details on weather in November, take a look at this page: Machupicchu weather in November.
In September, temperatures range from a minimum of 0°C (33°F) to a maximum of 17°C (62°F), with an average of 8°C (47°F). The month sees 102 mm (4.0 in) of precipitation over 28 days, accompanied by a humidity level of 52%. In contrast, December experiences milder temperatures, with minimums of 4°C (40°F) and maximums reaching 18°C (64°F), resulting in an average of 10°C (50°F). However, December also brings more rainfall, totaling 273 mm (10.7 in) across 31 days, and much higher humidity at 89%. For more details, visit Machupicchu weather in December.
As September unfolds in Machu Picchu, visitors can expect a transition to cooler temperatures and increased rainfall compared to the drier winter months. The average daytime warmth becomes more refreshing, but the nights can feel brisk, prompting the need for a cozy jacket. With nearly every day experiencing some degree of precipitation, it's essential to come prepared for the humid environment, as the lush landscape starts to revive after the dry season. This unique climate makes September a beautiful time to explore the ancient ruins amid vibrant greenery, though one should be ready for the occasional shower. To learn more about what to expect throughout the year, check out the detailed insights in our guide on the Machupicchu Climate.