Last updated: August 27, 2025
In September, La Merced, Peru experiences a cool and damp climate characterized by a maximum temperature of 17°C (63°F) and a chilly average of 9°C (49°F), with nighttime lows dipping to 3°C (37°F). The region sees significant precipitation, with a total of 83 mm (3.3 in) over approximately 20 rainy days, contributing to a humidity level of 52%. This combination of mild temperatures and persistent rainfall creates a vibrant landscape, making September a unique month for both residents and visitors.
In September, La Merced, Peru experiences appealingly cool temperatures, with a minimum of 3°C (37°F) and an average hovering around 9°C (49°F). As days gradually transition from the colder depths of winter, residents and visitors can expect a pleasant maximum of 17°C (63°F), echoing the mild climate of the preceding months. This pattern reflects a slight warming trend as the region edges closer to spring, contrasted with the chillier temperatures seen in July and August. The comforting temperatures make September an ideal time for outdoor activities, inviting exploration of the beautiful landscapes surrounding the city.
In September, La Merced experiences a noticeable uptick in precipitation, recording 83 mm (3.3 in) of rain over the course of 20 days. This marks a significant increase compared to the drier months of July and August, which saw much lower totals of 49 mm (1.9 in) and 56 mm (2.2 in) respectively. As the region transitions from the drier winter months, the increase in rainfall is indicative of the onset of spring, setting the stage for the wetter months ahead. This pattern highlights a seasonality in rainfall that peaks toward the end of the year, with November and December often experiencing even heavier downpours.
In September, La Merced, Peru, experiences a notable increase in humidity, rising to 52% after the drier months of July and August, which saw levels dip to a mere 54% and 44% respectively. This gradual uptick signals the onset of the wetter season, as the landscape prepares for the abundant rains that characterize the latter part of the year. As September transitions into October, humidity levels continue to climb, reaching 65%, while overall conditions shift noticeably from the dry spell of mid-year. This trend encapsulates La Merced's dynamic climate, showcasing how humidity fluctuates throughout the year, influencing both the environment and the daily lives of its inhabitants.
In September, La Merced experiences a notable UV Index of 16, maintaining its classification in the extreme exposure category, with a swift burn time of just 10 minutes. This month continues a trend observed throughout the year, where the UV Index remains consistently high, peaking from January to March at a staggering 19. Even as the months shift towards the end of the year, values remain elevated, with only slight fluctuations, showing a resilient pattern of intense sun exposure. Be sure to protect yourself against harmful UV rays if you're in the area! For more detailed information, visit La Merced UV Index.
UV Risk Categories
As September rolls in, La Merced basks in an impressive 311 hours of sunshine, perfectly encapsulating the region's vibrant transition into spring. Following a peak of 326 hours in August, this slight dip still showcases a remarkable abundance of daylight, providing ample opportunity for outdoor adventures and cultural exploration. The sunshine hours throughout the year display a clear upward trend from January's modest 209 hours to a striking crescendo in July and August, making La Merced an ideal destination for sun-seekers. As the year progresses, even with a gradual decrease in daylight towards the end of the year, La Merced remains a warm beacon of light, ensuring that residents and visitors alike can revel in the beauty of its sunny climate.
In La Merced, Peru, the likelihood of sunny weather sees an interesting trend as the year progresses. Beginning with a modest 7% chance of sunshine in January, the probability gradually rises, peaking at 39% in July. As summer transitions into the shoulder months, August maintains a solid 33%, while September sees a slight dip, resulting in a 28% chance of sun. This suggests that as the dry season approaches, visitors can still anticipate a fair share of bright, sunny days to enjoy the region’s lush landscapes. However, as October rolls in, the chance of sunny weather declines to 18%, hinting at the onset of the wetter months ahead.
As September unfolds in La Merced, Peru, residents and visitors alike can enjoy a generous 12 hours of daylight, marking a return to the balanced daylight seen during the earlier months of the year. Following a spell of consistent 11 hours from April through August, September heralds a shift back to longer days, reminiscent of the summer-like brightness of January through March. This seasonal rhythm showcases how La Merced experiences a harmonious cycle of light, with daylight gradually lengthening in the spring and returning to its full glory as autumn sets in. As the days grow brighter, September invites everyone to embrace the vibrant landscapes and outdoor activities that the region has to offer.
In September, the winds in La Merced, Peru begin to dance ever so slightly, with an average speed of 1.1 m/s (3 mph). This subtle uptick in velocity marks a gentle shift from the calm of the preceding months. Throughout the year, the wind remains fairly consistent, hovering around 1.0 to 1.2 m/s, creating a serene atmosphere ideal for enjoying the lush landscapes. Interestingly, September’s gusts mirror those of October, suggesting a sustained breeze that carries the whispers of the season. As the year progresses, the winds maintain a comfortable rhythm, hinting at a harmonious balance between tranquility and invigorating freshness that enchants both residents and visitors alike.
Weather in La Merced varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Merced, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, we observe some notable differences. September typically experiences milder temperatures, with a minimum of 3°C (37°F) and an average of 9°C (49°F), while January is slightly warmer, with a minimum of 4°C (40°F) and an average of 10°C (51°F). Precipitation also differs significantly; September sees about 83 mm (3.3 in) over 20 days, whereas January has nearly doubled that amount, with 182 mm (7.2 in) spread across 25 days. Furthermore, January is characterized by much higher humidity at 93%, compared to September’s 52%. For a closer look at the specific conditions in January, you can visit La Merced weather in January.
When comparing the weather in September and February, we see notable differences. September typically features cooler temperatures with a minimum of 3°C (37°F) and an average of 9°C (49°F), while February is a bit warmer, with a minimum of 5°C (41°F) and an average of 10°C (51°F). February not only has slightly higher temperatures but also experiences significantly more rainfall, with precipitation reaching 224 mm (8.8 in) over 27 days, compared to September's 83 mm (3.3 in) spread over 20 days. Furthermore, February's humidity level is considerably higher at 92% compared to September's 52%. This suggests that February is not only wetter but also feels more humid, making for a distinct difference in the overall weather experience during these two months. For more detailed weather insights, you can check La Merced weather in February.
In comparing September and March weather, both months feature similar maximum temperatures of 17°C (63°F), but with distinctive differences in their overall conditions. September typically sees a milder temperature range with a minimum of 3°C (37°F) and an average of 9°C (49°F), while March starts slightly warmer with a minimum of 5°C (42°F) and an average of 10°C (51°F). Notably, March experiences significantly higher precipitation at 190 mm (7.5 in) over 30 days, compared to September's 83 mm (3.3 in) across 20 days. Furthermore, humidity levels in March are considerably higher at 92%, compared to September's 52%, leading to a more damp and humid environment. For more information on March weather specifically, check out La Merced weather in March.
In comparing the weather conditions of September and April, we see some notable differences. September offers slightly cooler temperatures, with average highs around 17°C (63°F) and lower humidity at 52%. In contrast, April experiences a bit warmer climate with average highs reaching 18°C (65°F) and higher humidity at 90%, resulting in a more damp atmosphere. Precipitation is also more significant in April, totaling 117 mm (4.6 in) over 26 days compared to September's 83 mm (3.3 in) over 20 days. This combination of factors makes September feel crisper, while April tends to be wetter and more humid, as discussed in further detail here: La Merced weather in April.
In September, the weather exhibits a slight warming trend compared to May, with maximum temperatures reaching 17°C (63°F) against May's 18°C (64°F). Both months share similar average temperatures at 9°C (49°F), but September typically experiences slightly lower minimum temperatures of 3°C (37°F) compared to May's 2°C (36°F). Precipitation levels are comparable, with September recording 83 mm (3.3 in) over 20 days, while May sees slightly higher rainfall at 87 mm (3.4 in) spread over 21 days. Notably, humidity is significantly higher in May at 85% versus 52% in September, making May feel much more muggy. For more detailed information, visit La Merced weather in May.
September weather tends to be warmer than June, with maximum temperatures reaching up to 17°C (63°F) compared to June's peak of 16°C (61°F). However, June experiences slightly cooler minimum temperatures, with a low of 1°C (34°F) compared to September's low of 3°C (37°F). Additionally, September sees more precipitation, with an average of 83 mm (3.3 in) over 20 days, while June has only 55 mm (2.2 in) spread over 13 days. Humidity levels are higher in June at 70%, compared to September’s 52%. For a more detailed look at June weather, check La Merced weather in June.
In comparing the weather between September and July, we see that September has slightly warmer temperatures, with minimums around 3°C (37°F) and an average of 9°C (49°F), while July experiences minimums of 0°C (32°F) and an average of 8°C (47°F). Both months share a maximum temperature of 17°C (63°F). However, September is significantly wetter, receiving 83 mm (3.3 in) of rainfall over 20 days, compared to July’s 49 mm (1.9 in) over just 10 days. Humidity levels in July are marginally higher at 54%, versus September's 52%. For a closer look at July weather, visit La Merced weather in July.
In comparing the weather of September and August, September experiences slightly warmer average temperatures, with a minimum of 3°C (37°F) and an average of 9°C (49°F), while August's minimum is only 0°C (32°F) and an average of 8°C (47°F). Both months share the same maximum temperature of 17°C (63°F), but September sees more precipitation, totaling 83 mm (3.3 in) over 20 days compared to August's 56 mm (2.2 in) over 15 days. Additionally, September is more humid with a humidity level of 52%, while August has a lower humidity of 44%. For a detailed overview of August weather, you can refer to La Merced weather in August.
In comparing the weather of September and October, we see a notable increase in both temperature and humidity. September experiences average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 17°C (63°F), while October sees slightly warmer conditions with minimums of 3°C (38°F) and maximums reaching 20°C (67°F). Additionally, October is characterized by increased precipitation, totaling 116 mm (4.6 in) over 26 days, compared to September's 83 mm (3.3 in) across 20 days. The rise in humidity from 52% in September to 65% in October contributes to a more pronounced feeling of moisture in the air. For more detailed information specifically about La Merced, you can check out La Merced weather in October.
In September, the weather tends to be cooler with average temperatures around 9°C (49°F), while November sees a slight increase, averaging at 11°C (52°F). The maximum temperature in September reaches 17°C (63°F) compared to November's higher peak of 19°C (66°F). However, November is notably wetter, with precipitation totaling 151 mm (6.0 in) spread over 28 days, in contrast to September's 83 mm (3.3 in) over 20 days. Additionally, humidity levels rise significantly in November to 81%, compared to September's 52%. For more detailed information, you can check La Merced weather in November.
In September, the weather is generally cooler with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 17°C (63°F), and an average of 9°C (49°F). The month experiences moderate precipitation of 83 mm (3.3 in) over about 20 days, with humidity levels around 52%. In contrast, December sees slightly warmer temperatures, with a minimum of 5°C (42°F) and a maximum of 19°C (67°F), averaging at 11°C (52°F). However, it is significantly wetter, with 183 mm (7.2 in) of precipitation across 28 days and much higher humidity at 89%. For more specific insights on December weather, check out La Merced weather in December.
As September unfolds in La Merced, the weather showcases a cooler profile compared to the preceding months, marked by pleasant daytime temperatures and brisk evenings. While the region sees a notable increase in rainfall, with about 20 days of precipitation, this month stands out by blending refreshing humidity with a distinct chill in the air. The interplay of wet weather and mild temperatures invites both locals and visitors to embrace the lush landscape that thrives in these conditions. For a deeper dive into the climatic patterns of La Merced, explore La Merced Climate and discover how this unique environment shapes the region throughout the year.