September Weather in Itapema, Brazil

Last updated: August 21, 2025

September in Itapema, Brazil welcomes the transition to spring, with average temperatures hovering around 19°C (66°F) and a maximum of 24°C (76°F), creating a pleasant climate for residents and visitors alike. The month experiences a minimum temperature of 13°C (56°F), ensuring comfortable cool evenings. However, prepare for wet days, as the area sees around 99 mm (3.9 in) of rainfall spread over 13 days, contributing to a humidity level of 82%. This blend of warmth and precipitation underlines the lush beauty of Itapema, making it a vibrant destination during this time of year.

September Temperature in Itapema

In September, Itapema, Brazil, begins to transition towards the warmer spring months, with temperatures reflecting this shift. The minimum temperature rises to a comfortable 13°C (56°F), while the average settles at 19°C (66°F), providing a mild climate perfect for outdoor activities. As the month progresses, the maximum temperature can reach up to 24°C (76°F), consistent with the cooler summer days ahead. This gradual warming trend marks a refreshing change from the cooler winter months of July and August, inviting visitors to enjoy the beautiful coastal scenery as nature awakens. Overall, September in Itapema offers a delightful blend of moderate warmth and pleasant weather, setting the stage for the vibrant energy of the upcoming spring season.

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

The chart illustrates September temperature patterns in Itapema, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Itapema, 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).
JanFebMarAprMayJunJulAugSepOctNovDec787776736965636366697174
Data source: Temperature data for Itapema generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Itapema

In September, Itapema experiences a moderate precipitation total of 99 mm (3.9 in), which falls between the drier months of July and August and the wetter months of October and December. Rainfall days amount to 13, suggesting that while September sees some rain, it still allows for plenty of dry spells. This trend indicates a gradual build-up to the seasonal rains typical of the coming months, setting a refreshing tone as the region transitions from winter into spring. Overall, September serves as a balancing point, where the lingering coolness meets the anticipation of more substantial rainfall ahead.

September Precipitation Trends in Itapema

The chart displays monthly precipitation patterns in Itapema, 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 Itapema, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec167148146901191355267100136101149
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Itapema

In September, Itapema experiences a slight dip in humidity, averaging 82%, following the peak summer months. This is a part of a gradual transition as the region shifts from the winter months, where humidity levels were at their lowest in August at 79%. The pattern reveals that humidity tends to be elevated from the late spring through early fall, with levels consistently hovering around 80% or above for most of the year. As spring approaches, the humidity begins to rise again, indicating a return to the more tropical conditions that define this beautiful coastal city. Overall, Itapema's humidity levels reflect a typical tropical climate, ensuring a lush, vibrant environment year-round.

September Average Humidity in Itapema

This chart illustrates the average monthly humidity levels in Itapema, 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 Itapema is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%83%85%85%86%85%80%79%82%82%86%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Itapema

In September, Itapema, Brazil experiences a very high UV Index of 10, allowing for a burn time of just 15 minutes. This trend marks a return to elevated UV levels after a lighter summer month in July, where the index dipped to 5. Notably, as the region transitions from winter to spring, UV intensity ramps up again, aligning with the patterns seen in April and August, which also have high UV readings. The shift from moderate to very high exposure emphasizes the importance of sun protection as the season changes. For more detailed insights on UV levels throughout the year, visit Itapema UV Index.

Maximum UV Index Levels in Itapema for September

The chart shows the monthly maximum UV Index (UVI) for Itapema 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 Itapema typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141210765810131415
Data source: Itapema 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 Itapema

As September graces Itapema, Brazil, the sun shines for 248 hours, marking a slight dip from the peak summer months earlier in the year. This month often serves as a gentle transition, with daylight hours gradually waning as the vibrant summer gives way to the promise of autumn. While September's sunshine is less than the sun-drenched days experienced in March and November—where the sun shines for up to 306 and 313 hours respectively—it still offers ample opportunity for outdoor adventures and beach outings. The trend reveals a consistent pattern of abundant sunshine from January through May, followed by a gradual decline in the middle of the year, before a resurgence in the latter months. September, with its lingering warmth, invites visitors to soak in the last rays of the season, creating an inviting atmosphere for both relaxation and exploration.

Monthly Sunshine Duration in Itapema: September Highlighted

The September sunshine duration represents the total number of hours Itapema 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.
JanFebMarAprMayJunJulAugSepOctNovDec252h298h306h290h253h229h263h256h248h261h313h336h
Data source: Itapema September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Itapema During September

In Itapema, Brazil, the likelihood of sunny weather takes a noticeable dip in September, with a mere 28% chance of sunshine. This marks a decline from the sunnier months of July and May, which boast probabilities of 58% and 52%, respectively. As winter gracefully transitions into spring, September's cloudier days hint at the shifting seasons. The weather remains unpredictable, echoing the lower chances seen in the prior months of August and June. This trend underscores September as a time of varying weather patterns, where sun seekers might have to exercise a bit of patience before enjoying the vibrant rays that characterize the region's warmer months.

Percentage of Sunny Days in September in Itapema

The chart illustrates the percentage of sunny days in Itapema 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 Itapema experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec19%50%34%50%53%36%58%32%28%17%33%41%
Data source: Itapema September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Itapema in September

In September, the delightful coastal city of Itapema, Brazil, enjoys around 11 hours of daylight, marking a return to slightly longer days after the cooler winter months. As we transition from August, which also has 11 hours of daylight, there’s a noticeable shift towards more sunshine that signals the approach of spring. This trend continues into October with an increase to 12 hours, building up to the peak daylight durations of January and November, each offering a vibrant 13 hours of sunlight. Overall, the rhythm of daylight in Itapema showcases a gentle ebb and flow that enriches the region's natural beauty throughout the year.

Average Daylight Hours in Itapema for September

The chart illustrates the variation in daylight duration in Itapema throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec13h 36m12h 59m12h 12m11h 24m10h 45m10h 26m10h 36m11h 11m11h 56m12h 44m13h 26m13h 48m
Data source: Itapema daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Itapema

As September settles into Itapema, Brazil, the coastal breeze offers a delightful blend of warmth and refreshing air, with an average wind speed of 3.9 m/s (9 mph). This month marks a subtle uptick from the calmer winds of July and August, hinting at the arrival of sunnier days ahead. Following a summer of gentle breezes, September's winds provide a gentle reminder of the transitioning season, paving the way for the increased gusts that characterize October. Overall, September strikes a harmonious balance, showcasing how the coastal weather ebbs and flows, inviting both locals and visitors to enjoy the splendid outdoor charm of this vibrant coastal town.

Average September Wind Speed in Itapema

The chart displays monthly wind speed patterns in Itapema, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.63.63.54.43.94.43.33.63.9 m/s4.84.74.7
Data source: Itapema September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Itapema Compares to Other Months

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

When comparing the weather in September and January, notable differences emerge. September's temperatures are milder, with a minimum of 13°C (56°F) and an average of 19°C (66°F), peaking at 24°C (76°F). In contrast, January boasts warmer conditions, featuring a minimum of 21°C (71°F) and an average temperature of 25°C (78°F), reaching highs of 31°C (89°F). Additionally, January experiences significantly more rainfall, accumulating 167 mm (6.6 in) over 17 days, compared to September’s 99 mm (3.9 in) over 13 days. Both months have high humidity levels, with September at 82% and January slightly higher at 86%. For more detailed insights into January weather, you can visit Itapema weather in January.

September and February display distinct weather characteristics. In September, temperatures range from a minimum of 13°C (56°F) to a maximum of 24°C (76°F), with an average of 19°C (66°F). The month experiences moderate rainfall, totaling 99 mm (3.9 in) over 13 days, and maintains a humidity level of 82%. In contrast, February brings warmer conditions with temperatures ranging from 19°C (67°F) to a high of 32°C (90°F), averaging 25°C (77°F). This month sees more precipitation, with 148 mm (5.8 in) spread over 17 days and an almost equivalent humidity level of 83%. For more specific weather patterns, you can check Itapema weather in February.

In comparing the weather between September and March, we see notable differences in temperature and precipitation patterns. September typically has a milder temperature range with a minimum of 13°C (56°F) and an average of 19°C (66°F), peaking at a maximum of 24°C (76°F). In contrast, March is warmer, starting with a minimum of 20°C (68°F) and averaging 24°C (76°F), reaching up to 30°C (86°F). Additionally, March sees greater precipitation, with 146 mm (5.7 in) over 21 days compared to September's 99 mm (3.9 in) over 13 days. Humidity levels are relatively similar, with September at 82% and March at 85%. For more specific information on March weather, you can check Itapema weather in March.

When comparing the weather in September and April, we see notable differences in temperature and humidity levels. September typically experiences cooler temperatures, with a minimum of 13°C (56°F) and an average of 19°C (66°F), whereas April boasts warmer conditions, starting at a minimum of 16°C (61°F) and averaging 23°C (73°F). Precipitation levels are fairly similar in both months, with September receiving 99 mm (3.9 in) across 13 days and April slightly less at 90 mm (3.6 in) over 14 days. Humidity is also slightly higher in April at 85%, compared to September's 82%. For more details on April weather, you can visit Itapema weather in April.

When comparing the weather in September and May, both months exhibit mild temperatures, but May tends to be slightly warmer with an average temperature of 20°C (69°F), compared to September's average of 19°C (66°F). September experiences maximum temperatures of 24°C (76°F), while May can reach up to 27°C (81°F). In terms of precipitation, May has a higher total at 119 mm (4.7 in) over 14 days, compared to September's 99 mm (3.9 in) over 13 days. Additionally, May has a slightly higher humidity level of 86% compared to September's 82%. For more detailed information, you can check Itapema weather in May.

In comparing the weather between September and June, both months exhibit similar temperature ranges, with a minimum of 9-13°C (48-56°F) and a maximum of 24°C (76°F), while maintaining an average temperature of 19°C (66°F). However, June tends to be slightly wetter than September, with total precipitation of 135 mm (5.3 in) over 12 days compared to September's 99 mm (3.9 in) over 13 days. Additionally, humidity levels are marginally higher in June at 85% compared to September's 82%. For a more detailed analysis, you can refer to Itapema weather in June.

In comparing the weather between September and July, we can observe some notable differences. September typically sees a milder temperature range, with a minimum of 13°C (56°F) and an average of 19°C (66°F), while July experiences cooler temperatures, starting at a minimum of 8°C (47°F) and averaging 17°C (63°F). Both months share a maximum temperature of 24°C (76°F), but September is characterized by significantly higher precipitation, with 99 mm (3.9 in) over 13 days, compared to July's 52 mm (2.0 in) across just 7 days. The humidity levels are quite similar, with September at 82% and July at 80%. For more detailed insights, you can check Itapema weather in July.

In comparing the weather between September and August, September exhibits slightly warmer temperatures with an average of 19°C (66°F) compared to August's 17°C (63°F). Both months share the same maximum temperature of 24°C (75°F); however, September starts warmer with a minimum of 13°C (56°F) while August's minimum is lower at 10°C (51°F). Additionally, September experiences more precipitation with 99 mm (3.9 in) over 13 days, compared to August's 67 mm (2.6 in) over just 9 days. The humidity is also slightly higher in September at 82%, compared to 79% in August. For more details, visit Itapema weather in August.

In September, the weather is generally mild, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 24°C (76°F). With an average temperature of 19°C (66°F) and 99 mm (3.9 in) of precipitation spread over 13 days, the month tends to be quite humid at 82%.

In contrast, October brings slightly warmer conditions, featuring a minimum temperature of 16°C (61°F) and reaching up to 27°C (81°F), with an average of 21°C (69°F). However, this month also experiences more precipitation, totaling 136 mm (5.3 in) across 16 days, maintaining the same humidity level of 82%. For more detailed insights, you can check Itapema weather in October.

September and November exhibit notable differences in weather, with November generally being warmer and slightly more humid. In September, temperatures range from a minimum of 13°C (56°F) to a maximum of 24°C (76°F), while November enjoys a milder range of 16°C (61°F) to 27°C (81°F). Additionally, precipitation levels are similar, with September receiving 99 mm (3.9 in) over 13 days, and November slightly more at 101 mm (4.0 in) across 17 days. Humidity also rises from 82% in September to 86% in November, contributing to a more tropical feel. For a detailed overview of November weather in Itapema, you can visit Itapema weather in November.

In September, the weather in Itapema features milder temperatures, with an average of 19°C (66°F), while daytime highs reach around 24°C (76°F). The month experiences significant rainfall, totaling 99 mm (3.9 in) over about 13 days, and humidity levels hover at 82%. In contrast, December offers warmer conditions, with average temperatures rising to 24°C (75°F) and maximums peaking at 29°C (84°F). However, it also brings increased precipitation at 149 mm (5.9 in) over 18 days, with humidity slightly higher at 88%. For a detailed look at December's weather, see Itapema weather in December.

Compare Itapema's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Itapema

As September unfolds in Itapema, the weather shifts into a more mild and inviting pattern, with temperatures typically drifting around a pleasant average of 19°C (66°F). Compared to the preceding winter months, this marks a notable increase in warmth, while still enjoying the refreshing cooler nights. However, September also brings its share of rain, with an average of 13 rainy days contributing to a significant 99 mm (3.9 in) of precipitation. This month serves as a bridge, hinting at the upcoming summer warmth while maintaining a lush atmosphere fueled by high humidity levels. For a deeper dive into what to expect throughout the year, explore the Itapema Climate.