Last updated: August 27, 2025
In September, the weather in Junin, Peru features a varied landscape of temperatures, with maximum highs reaching 13°C (55°F) and average lows dipping to around 4°C (39°F). The presence of chilly nights is palpable, as temperatures can fall as low as -4°C (25°F). This month also witnesses significant rainfall, accumulating up to 95 mm (3.8 in) over 23 days, contributing to a humid atmosphere with 40% relative humidity. Prepare for a damp and refreshing climate, ideal for those who appreciate the invigorating crispness of high-altitude weather.
In September, Junin, Peru experiences a slight reprieve from the winter chill, with temperatures beginning to stabilize. The month sees minimums around -4°C (25°F), offering a bit more warmth compared to the colder depths of July and August, which recorded lows of -6°C (21°F) and -7°C (20°F), respectively. Average temperatures remain steady at about 4°C (39°F), mirroring June's mild conditions but showcasing a gradual transition towards warmer months. Max temperatures hover around 13°C (55°F), consistent with the cooler, late-winter atmosphere of the region. This trend of rising daytime highs indicates that while the chill persists, the promise of spring is just around the corner, inviting residents and visitors alike to embrace the changing season.
In September, Junin, Peru experiences a notable increase in precipitation, with 95 mm (3.8 inches) of rainfall spread over 23 days. This uptick in rainfall marks a shift from the drier months of June and July, while still falling short of the substantial downpours of early in the year. The gradual rise in precipitation from August's 50 mm (2.0 inches) hints at the transition into a wetter season, setting the stage for October's expected precipitation leap to 139 mm (5.5 inches). As the month unfolds, the consistent number of rainy days emphasizes the importance of September as a precursor to the more intense rainfall that characterizes Junin's climate in the latter part of the year.
In September, Junin, Peru experiences a notable shift in humidity, dropping to 40%, a change that reflects the gradual transition from the drier winter months. Following the peak humidity levels of 91% in the summer months, there is a clear downward trend from June's 65% to the August low of 38%. As the region moves into the latter part of the year, humidity begins to rise again in October, suggesting a seasonal fluctuation that is characteristic of Junin’s climate. This consistent ebb and flow not only shapes the local environment but also offers a captivating glimpse into the region's diverse weather patterns throughout the year.
In September, Junin, Peru experiences a UV Index of 17, categorized as extreme, with a burn time remaining at just 10 minutes. This marks a slight rise from the preceding month, reflecting the trend of increasing UV levels as the year progresses. The months leading up to September, particularly from January to August, consistently recorded extreme exposure, demonstrating the region's high susceptibility to strong solar radiation. As we move further into the latter part of the year, the UV Index trends indicate a persistent demand for sun protection. With early autumn approaching, individuals should remain vigilant about their sun safety practices. For more detailed insights, check out the Junin UV Index.
UV Risk Categories
As September unfolds in Junin, Peru, the welcoming warmth of the after-summer months continues to grace the region with an impressive 323 hours of sunshine. This marks a slight dip from the peak of 339 hours experienced in August, yet still reflects the tail end of a remarkable sunny season. The trend reveals a series of rising sunlight hours from January’s modest 212 hours to a vibrant 339 hours in August, before beginning to taper off as the year progresses. With October maintaining a wholesome 314 hours, it's clear that the sunny days of late winter and early spring provide a delightful backdrop for all who wish to explore the natural beauty and vibrant culture of this enchanting Peruvian locale. As the days grow shorter, the golden hues of September sunshine linger, inviting locals and visitors alike to bask in its warm embrace.
In September, Junin, Peru experiences a moderate likelihood of sunny weather, with a 22% chance of sunshine. The trend reveals a gradual increase in sunny days as the year progresses from the drearier months of January and February, which see only 4% and 7% chances, respectively. As spring approaches, June and July offer more optimism for sunseekers, peaking at 37% in July. However, September settles back to a more balanced outlook, aligning with the sun's retreat into the upcoming wetter months of October and November. Thus, while sunshine seekers may not hit the jackpot this month, the chance of enjoying pleasant days in September remains notably higher than at the start of the year.
In September, Junin, Peru, enjoys a resurgence of daylight, with approximately 12 hours of sun embracing the landscape. This marks a shift from the preceding months, where daylight lingered at 11 hours from April through August. As the year transitions, the return to 12 hours of daylight in September aligns with the consistent patterns witnessed in earlier months, such as January through March, and again in October through December. This rhythmic cycle of daylight not only enhances the beauty of the region but also energizes its vibrant culture, as locals relish the extended daylight for outdoor activities and communal gatherings.
As September unfolds in Junín, Peru, the wind makes its presence felt, picking up speed to an average of 1.9 m/s (4 mph). This marks the peak in the annual wind cycle, a slight but noticeable increase from the gentle breezes of previous months. While the winter months of June and July bring consistently mild winds around 1.4 to 1.8 m/s, the transition into spring heralds a change, with wind speeds gradually rising since May. The trend showcases a refreshing uptick in September that not only invigorates the landscape but also heralds the approach of warmer days ahead. Following this peak, the winds will taper off again into October, maintaining a moderate pace similar to the earlier months of the year. This dynamic ebb and flow of wind speeds reflects the seasonal shifts in Junín, perfectly harmonizing with the region's vibrant landscape.
Weather in Junin varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Junin, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit contrasting weather patterns. In September, temperatures range from a minimum of -4°C (25°F) to a maximum of 13°C (55°F), with an average of 4°C (39°F). The month experiences 95 mm (3.8 in) of precipitation over 23 days, accompanied by a relatively low humidity of 40%. In contrast, January sees slightly cooler temperatures, with a minimum of -5°C (23°F) and a maximum reaching 14°C (58°F), resulting in a higher average of 5°C (41°F). This month has significantly more rainfall, accumulating 201 mm (7.9 in) across 25 days, and high humidity levels of 91%. For more detailed information, you can check Junin weather in January.
In September, the weather typically features a chillier atmosphere with average temperatures around 4°C (39°F), ranging from a minimum of -4°C (25°F) to a maximum of 13°C (55°F). The month sees about 95 mm (3.8 in) of precipitation over 23 days, accompanied by a relatively low humidity level of 40%. In contrast, February experiences slightly milder temperatures, averaging 5°C (41°F) with a minimum of -3°C (27°F) and a maximum reaching 15°C (59°F). However, February is significantly wetter, with about 229 mm (9.0 in) of rainfall across 26 days and a much higher humidity of 90%. For more details on February weather, you can visit Junin weather in February.
In September, the weather in Junin sees average temperatures ranging from a minimum of -4°C (25°F) to a maximum of 13°C (55°F), with relatively low humidity at 40%. The region experiences about 95 mm (3.8 in) of precipitation over approximately 23 days. In contrast, March brings slightly milder temperatures, with an average ranging from -2°C (28°F) to 13°C (55°F), but it comes with significantly higher precipitation of 247 mm (9.7 in) spread across 31 days and much higher humidity at 91%. The shift from September to March highlights not only a small increase in temperature but also a notable rise in both rainfall and humidity levels. For a detailed look at March weather in Junin, visit Junin weather in March.
In comparing the weather of September and April, we see a shift in temperature and humidity. September tends to be cooler, with average temperatures ranging from a minimum of -4°C (25°F) to a maximum of 13°C (55°F), while April's temperatures are slightly warmer, averaging from -4°C (25°F) to a maximum of 14°C (58°F). Precipitation is also more pronounced in April, totaling 125 mm (4.9 in) over 25 days compared to September's 95 mm (3.8 in) over 23 days. Additionally, April experiences significantly higher humidity levels at 89%, contrasting with September's lower humidity of 40%. For a closer look at the weather specifics, you can visit Junin weather in April.
September and May display similar average temperatures, both hovering around 4°C (39°F), but May experiences slightly warmer maximum temperatures, reaching 14°C (57°F) compared to September's high of 13°C (55°F). Notably, May is characterized by higher humidity levels at 85%, compared to September's more comfortable 40%. Precipitation is comparable in both months, with September receiving 95 mm (3.8 in) and May slightly less at 88 mm (3.5 in), though both months see precipitation on 23 days. For more detailed insights into May weather, you can visit Junin weather in May.
When comparing the weather in September and June, we observe that both months have similar average temperatures, hovering around 4°C (39°F) with maximums reaching 13°C (55°F). However, September experiences significantly more precipitation, with 95 mm (3.8 in) spread over 23 days, compared to June's 39 mm (1.5 in) over just 12 days. Additionally, June exhibits higher humidity levels at 65%, while September maintains a much lower humidity of 40%. This distinct difference in precipitation and humidity profiles highlights how June tends to be drier and more humid, influencing overall comfort levels. For detailed insights into June weather, you can visit Junin weather in June.
In comparing the weather between July and September, we observe that both months have similar maximum temperatures, hovering around 13°C (55°F) to 13°C (56°F). However, September tends to be milder on average, with temperatures ranging from a minimum of -4°C (25°F) to an average of 4°C (39°F), compared to July's minimum of -6°C (21°F) and average of 3°C (38°F). September also has significantly higher precipitation, with 95 mm (3.8 in) falling over 23 days, while July experiences only 35 mm (1.4 in) over 11 days. Additionally, July is slightly more humid at 47% compared to September's 40%. For a more detailed look at July weather in Junin, visit Junin weather in July.
In comparing the weather of September and August, September tends to be slightly warmer with an average temperature of 4°C (39°F), compared to August's average of 3°C (38°F). The maximum temperature in September reaches up to 13°C (55°F), while in August it is slightly higher at 14°C (58°F). However, September is notably wetter, receiving 95 mm (3.8 in) of precipitation over 23 days, contrasting sharply with August's drier conditions of 50 mm (2.0 in) over just 14 days. Humidity levels are relatively similar, with September at 40% and August slightly lower at 38%. For a detailed look at August weather in Junin, you can check this link: Junin weather in August.
In September, the weather is characterized by a minimum temperature of -4°C (25°F) and an average of 4°C (39°F), with maximum temperatures reaching 13°C (55°F). The month sees moderate precipitation, totaling 95 mm (3.8 in) over 23 days and relatively low humidity at 40%. In contrast, October experiences slightly colder nights with a minimum temperature of -5°C (23°F), while daytime highs remain similar at 13°C (57°F) and the average temperature rises slightly to 4°C (40°F). However, October is marked by increased rainfall, accumulating 139 mm (5.5 in) over 26 days, along with higher humidity levels at 56%. For more detailed insights about October weather, you can visit Junin weather in October.
In September, the weather features cooler temperatures, with minimums around -4°C (25°F) and an average of 4°C (39°F), peaking at a maximum of 13°C (55°F). This month experiences relatively low humidity at 40% and a total precipitation of 95 mm (3.8 in) over 23 days. In contrast, November sees a slight increase in temperatures, with a minimum of -3°C (27°F), an average of 5°C (42°F), and a maximum of 14°C (57°F). However, November is characterized by higher humidity at 76% and significantly increased precipitation, totaling 177 mm (7.0 in) across 27 days. For more detailed weather information, you can check Junin weather in November.
In September, the weather typically ranges from a minimum of -4°C (25°F) to a maximum of 13°C (55°F), with an average temperature of 4°C (39°F). This month experiences about 95 mm (3.8 in) of precipitation spread over 23 days, accompanied by a humidity level of 40%. In contrast, December sees slightly colder minimum temperatures at -5°C (23°F) but maintains a higher average of 5°C (42°F) and a maximum of 14°C (58°F). Additionally, December is characterized by increased precipitation of 199 mm (7.8 in) over 28 days and significantly higher humidity at 90%. For more detailed information, you can check Junin weather in December.
As September rolls into Junin, the weather begins to shift distinctly from the chill of winter to a more variable early spring ambiance. Despite milder average temperatures, with highs climbing above 10°C, the month is characterized by a notable increase in precipitation, as the region experiences rain on more than two-thirds of the days. This increased moisture coupled with moderate humidity creates a feeling of freshness in the air, setting September apart from the drier, colder months that precede it. For more insights into how the climate shapes the beauty of this region, check out Junin Climate.