Last updated: August 21, 2025
In September, Nova Friburgo experiences a delightful blend of warmth and refreshing rainfall, making it a unique time of year for residents and visitors alike. With maximum temperatures reaching a cozy 31°C (89°F) and an average of 20°C (67°F), outdoor activities are enticing. However, the minimum temperatures can dip to a cool 8°C (46°F), reminding us of the nighttime chill. This month sees 84 mm (3.3 in) of rain over 11 days, resulting in a humidity level of 68%, which adds to the overall lushness of the region. Whether indulging in outdoor exploration or cozy indoor retreats, September in Nova Friburgo offers a captivating climate for all.
In September, Nova Friburgo experiences a delightful transition as temperatures begin to rise after the cooler winter months. With a minimum temperature of 8°C (46°F), an average of 20°C (67°F), and a pleasant maximum reaching 31°C (89°F), the weather reflects a shift toward warmth and mildness. This month marks a noticeable uptick from August, where temperatures hovered lower, and sets the stage for the warmth of summer ahead. As the days grow longer and the air becomes crisper, September is a perfect time to enjoy the outdoors and embrace the vibrant beauty of this Brazilian gem.
In September, Nova Friburgo experiences a modest uptick in precipitation, with 84 mm (3.3 in) of rain spread over 11 days. This marks a slight increase from August, which saw only 72 mm (2.8 in), indicating the onset of a wetter season as the region transitions into spring. Compared to the drier months of May and June, where precipitation plummeted to 77 mm (3.0 in) and 41 mm (1.6 in) respectively, September's rainfall signals a gradual reawakening of the region's lush greenery. As the yearly cycle progresses, the precipitation amounts will continue to rise significantly in the following months, peaking in the late spring and early summer, ultimately culminating in the year's heaviest downpours in November and December.
In September, Nova Friburgo, Brazil, experiences a notable dip in humidity, dropping to 68%. This decrease marks a significant transition as the region moves from the heavy moisture of the earlier months, where humidity hovers around 85% in January and February, gradually declining to 73% in August. The cooler and drier air of September sets the stage for the approaching dry season, with October further reducing humidity to 61%. This trend reflects a comfortable shift, inviting residents and visitors alike to enjoy the refreshing change and the beauty of early spring in the region.
In September, the UV Index in Nova Friburgo, Brazil rises to a remarkable 12, categorizing it as extreme with a burn time of just 10 minutes. This marks a notable increase from the previous month and reflects the overall trend of high UV exposure that characterizes the spring months in the region. Following a gradual decline from January’s peak of 16, the UV levels stay consistent with the extreme category through September and into October. As Brazilians embrace warmer days, it's essential to remain vigilant against the sun's rays. For more details on UV levels throughout the year, visit Nova Friburgo UV Index.
UV Risk Categories
September in Nova Friburgo, Brazil, shines brightly with 307 hours of sunshine, marking it as one of the sunniest months of the year. Following the peaks of March and December, which boast 320 and 329 hours, respectively, September maintains an encouraging trend of abundant sunlight. This month acts as a transition as the year glides into its final quarter, reflecting a consistent pattern of sunshine that peaks during the warmer months. With the sun gracing the sky more than in the preceding months, September invites locals and visitors alike to enjoy the vibrant outdoors, bask in the warmth, and embrace the beauty of this charming Brazilian town.
As September rolls in, Nova Friburgo, Brazil, typically sees a 38% chance of sunny weather, marking a transition to cloudier months ahead. This figure reflects a slight decline from the notable 61% high in July, which is the sunniest month of the year. While September enjoys more sunshine than the winter months, it still faces more unpredictability compared to the drier, sunnier days of mid-year. The pattern indicates that as spring approaches, residents and visitors can expect fluctuating weather, with the promise of sunny intervals peeking through the clouds, albeit less frequently than in the preceding months.
In Nova Friburgo, Brazil, September heralds the arrival of spring with a daylight duration of 11 hours—consistent with the preceding months of August and May. The transition from the longer days of summer to the shorter days of winter is evident as the year progresses. This month stands at the halfway point between the peak daylight months of January and November, each boasting 13 hours of daylight. As the days gradually lengthen towards October, the trend indicates a return to more vibrant and illuminated days, setting the stage for the vibrant landscapes and lively outdoor activities that spring brings.
As September arrives in Nova Friburgo, Brazil, the wind begins to pick up, reaching an average speed of 2.0 m/s (5 mph). This subtle increase marks a shift from the milder breezes of the earlier months, signaling a transition towards the more dynamic winds of spring. Following a summer where average speeds hovered around 1.4 to 1.9 m/s, September's gusts breathe fresh energy into the landscape. This trend suggests a gentle awakening of the environment, as the city and its surrounding nature prepare for the vibrant changes ahead. The consistent pattern of rising wind speeds from July through September hints at a refreshing breeze that complements the warmer weather, inviting both residents and visitors to embrace the outdoors with renewed vitality.
Weather in Nova Friburgo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nova Friburgo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures range from a mild 8°C (46°F) to a warm 31°C (89°F), with an average temperature of 20°C (67°F). The month experiences around 84 mm (3.3 in) of precipitation over 11 days, accompanied by a relative humidity of 68%. In contrast, January brings warmer conditions, with minimum temperatures of 15°C (59°F) and a maximum of 32°C (89°F), averaging 23°C (74°F). However, it is also much wetter, receiving about 220 mm (8.6 in) of rainfall across 18 days and higher humidity at 85%. For a more detailed look at January weather conditions, you can check Nova Friburgo weather in January.
September and February exhibit notable differences in weather. In September, temperatures range from a chilly minimum of 8°C (46°F) to a warm maximum of 31°C (89°F), with an average of 20°C (67°F). Precipitation is relatively moderate, totaling 84 mm (3.3 in) over about 11 days, while humidity sits at 68%. In contrast, February is consistently warmer, with minimum temperatures around 15°C (59°F) and a maximum reaching 32°C (89°F), averaging 22°C (72°F). However, February also experiences significantly higher rainfall, accumulating 338 mm (13.3 in) across approximately 24 days, resulting in increased humidity at 85%. For a closer look at February weather specifics, you can visit Nova Friburgo weather in February.
September and March exhibit contrasting weather patterns, reflective of their respective seasonal transitions. In September, temperatures range from a mild minimum of 8°C (46°F) to an average of 20°C (67°F), peaking at a warm 31°C (89°F). This month sees relatively lower precipitation, totaling 84 mm (3.3 in) across 11 rainy days, with humidity sitting at a comfortable 68%.
In comparison, March experiences warmer nights with a minimum temperature of 13°C (56°F) and an average of 22°C (72°F), while still reaching a maximum of 32°C (89°F). However, March is significantly wetter, with precipitation soaring to 248 mm (9.8 in) over 22 days and higher humidity at 86%. For a detailed look at the climate specifics, you can explore Nova Friburgo weather in March.
September and April offer notable differences in weather conditions. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 31°C (89°F), with an average of 20°C (67°F). The month experiences 84 mm (3.3 in) of precipitation over 11 days, accompanied by a humidity level of 68%. In contrast, April sees slightly warmer mornings with a minimum temperature of 11°C (52°F) and a similar average of 20°C (68°F). The maximum temperature reaches 30°C (86°F), but the month is wetter, with 131 mm (5.2 in) of precipitation falling over 17 days and higher humidity at 83%. For more detailed insights, you can check out Nova Friburgo weather in April.
When comparing the weather in September and May, both months exhibit mild temperatures and moderate precipitation. September tends to be slightly warmer, with average highs reaching 31°C (89°F) compared to May's maximum of 28°C (83°F). However, May has a cooler minimum temperature of 7°C (45°F) compared to September's 8°C (46°F). Both months experience similar rainfall, with September receiving 84 mm (3.3 in) over 11 days and May slightly less at 77 mm (3.0 in) across 12 days. Additionally, May is characterized by a higher humidity level of 81% versus September's 68%. For more information on weather patterns, you can visit Nova Friburgo weather in May.
September generally offers warmer temperatures compared to June, with average highs reaching 31°C (89°F) versus June's 28°C (82°F). The minimum temperatures are quite similar, both hovering around 8°C (46°F in September and 47°F in June). However, September experiences more precipitation, totaling 84 mm (3.3 in) over 11 days, compared to June's 41 mm (1.6 in) over just 9 days. Additionally, the humidity in June is slightly higher at 80%, while in September, it averages 68%. For a closer look at the weather in June, you can visit Nova Friburgo weather in June.
When comparing the weather in September and July, September tends to be warmer and wetter. The average temperature in September reaches 20°C (67°F), with maximums soaring to 31°C (89°F), while July has a cooler average of 16°C (62°F) and a maximum of 28°C (82°F). Additionally, September experiences more precipitation, with 84 mm (3.3 in) over approximately 11 days, compared to July's 30 mm (1.2 in) over just 6 days. Humidity is also notable, as September has a humidity level of 68%, slightly lower than July’s 76%. For more specifics about July weather, you can refer to Nova Friburgo weather in July.
In September, the weather feels slightly warmer compared to August, with minimum temperatures rising from 5°C (42°F) in August to 8°C (46°F) in September. The average temperature in September is also higher at 20°C (67°F), compared to August’s 17°C (62°F). Although both months experience 11 days of precipitation, September sees a modest increase in total rainfall, with 84 mm (3.3 in) compared to August’s 72 mm (2.8 in). Humidity remains relatively high in both months, but it is slightly lower in September at 68% compared to 73% in August. For a more detailed look at August weather, you can visit Nova Friburgo weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 31°C (89°F), with an average temperature of 20°C (67°F). The month experiences 84 mm (3.3 in) of precipitation over 11 days, accompanied by a humidity level of 68%. In contrast, October sees slightly higher temperatures, with a minimum of 10°C (50°F) and a maximum of 33°C (92°F), while maintaining the same average of 20°C (69°F). However, October is considerably wetter, receiving 180 mm (7.1 in) of rainfall over 21 days, and humidity drops to 61%. For more details, visit Nova Friburgo weather in October.
In comparing the weather between September and November, we see some notable differences. September typically offers milder temperatures, with a minimum of 8°C (46°F) and a maximum of 31°C (89°F), while November sees a slightly higher minimum of 9°C (49°F) and a peak at 32°C (90°F). However, November is significantly wetter, with total precipitation reaching 314 mm (12.4 in) over 23 days, compared to September's 84 mm (3.3 in) spread over 11 days. Additionally, humidity levels rise slightly from 68% in September to 72% in November, contributing to a more humid atmosphere as the latter month progresses. For more detailed information, you can refer to Nova Friburgo weather in November.
September and December in Nova Friburgo showcase distinct weather patterns that reflect the transition from late winter to early summer. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 31°C (89°F), with an average of 20°C (67°F) and relatively moderate humidity at 68%. The month sees about 84 mm (3.3 in) of precipitation over 11 days, providing a refreshing start to spring.
In contrast, December experiences a slight increase in temperatures, averaging 22°C (71°F) with minimums at 10°C (51°F) and maximums reaching up to 31°C (87°F). However, it also brings a significant increase in precipitation, totaling 355 mm (14.0 in) over 26 days, making it a wetter month overall, accompanied by higher humidity at 75%. For more detailed insights, check out Nova Friburgo weather in December.
As September unfolds in Nova Friburgo, the weather transitions with a unique charm, offering a delightful mix of warmth and coolness that sets it apart from the other months. While the temperatures can peak at a balmy 31°C, the average of 20°C brings a refreshing balance, especially when juxtaposed with the cooler nights that can drop to 8°C. September is marked by a moderate level of precipitation, with about 11 days of rain contributing to a lush landscape, highlighting the region's rich biodiversity. The humidity hovers around 68%, adding a slight stickiness to the air but also making those sunny days feel pleasantly warm. To explore more about the year-round climate in this captivating region, visit Nova Friburgo Climate.