August Weather in Arenal, Peru

Last updated: August 27, 2025

In August, Arenal, Peru experiences a delightful blend of pleasant temperatures and low precipitation, making it an ideal month for outdoor exploration. The maximum temperature reaches a comfortable 27°C (82°F), while the average temperature hovers around a balmy 20°C (68°F), and the minimum dips to a cozy 15°C (59°F) at night. With a stunningly low precipitation amount of just 1 mm and no recorded rainy days, visitors are welcomed by bright skies and refreshing air, complemented by a humidity level of 71% that enhances the region's lush beauty. This charming weather invites travelers to immerse themselves in Arenal’s vibrant landscapes and abundant natural wonders.

August Temperature in Arenal

In Arenal, Peru, August brings cooler temperatures, marking a notable dip as the year progresses. With minimums averaging around 15°C (59°F) and daytime highs peaking at 27°C (82°F), visitors can expect a refreshing escape from the warmer months. The overall average temperature hovers at a comfortable 20°C (68°F), ideal for exploring the lush landscapes and engaging in outdoor activities. This month typically signals the transition towards the end of the dry season, resulting in pleasantly mild weather compared to the sweltering heat of earlier months like March and February. As temperatures remain relatively stable through September, August provides a unique blend of comfortable climate and vibrant surroundings, making it a great time to experience the natural beauty of the region.

August Weather in Arenal: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Arenal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arenal, August 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).
JanFebMarAprMayJunJulAugSepOctNovDec778080777471696868697074
Data source: Temperature data for Arenal 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.

August Precipitation in Arenal

August in Arenal, Peru, is characterized by an exceptionally dry spell, marking the peak of the dry season with a mere 1 mm of precipitation, equivalent to just 0.0 inches. This trend of minimal rainfall persists from June through September, highlighting a significant dip in moisture levels after a wetter early part of the year. Notably, August also records zero days of rain, continuing the pattern established in the preceding months. This stark contrast to the more moisture-laden earlier months—like March, which sees a hefty 93 mm of rain over eight days—illustrates the region's seasonal variation, making August a typically dry and serene period in Arenal.

August Precipitation Trends in Arenal

The chart displays monthly precipitation patterns in Arenal, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Arenal, August typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec11429319622114516
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Arenal

In Arenal, Peru, the humidity levels create a vibrant tropical atmosphere, peaking dramatically at 89% in both January and May. As the year progresses, the humidity gradually decreases, hitting a notable low of 71% in both July and August, marking a refreshing mid-year change. This dip contrasts sharply with the humidity levels seen earlier in the year, illustrating a distinct seasonal variation. Following August, humidity levels begin to rise again in September, hinting at the region's characteristic lushness as the year transitions toward the wetter months. The return to higher humidity in the latter part of the year reinforces Arenal's reputation as a verdant paradise, perfect for visitors seeking a captivating natural experience.

August Average Humidity in Arenal

This chart illustrates the average monthly humidity levels in Arenal, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Arenal is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%87%87%86%89%84%71%71%75%77%79%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Arenal

In August, Arenal, Peru experiences a UV Index of 12, maintaining its classification in the extreme exposure category. This slight dip from July’s UV Index of 11 signals that while the sun's intensity remains high, it's still essential to prioritize sun safety with a burn time of just 10 minutes. Observing trends throughout the year, it’s clear that the UV Index is consistently extreme from January through June, reaching a peak in March at a staggering 16. As the months progress, the Index shows a slight fluctuation but remains notably high, making it crucial for residents and visitors alike to stay vigilant. For more detailed information, check out Arenal UV Index.

Maximum UV Index Levels in Arenal for August

The chart shows the monthly maximum UV Index (UVI) for Arenal in August, 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 August, the maximum UV index in Arenal typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141516151311111213131313
Data source: Arenal August 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.

August Sunshine in Arenal

Arenal, Peru, basks in an impressive array of sunshine throughout the year, with August standing out as one of the sunniest months. Averaging 332 hours of glorious sunlight, August benefits from the tail end of the dry season, allowing visitors to savor the vibrant natural beauty of this enchanting region. This trend of increasing sunshine is evident as the year progresses, peaking in December with an impressive 345 hours. From January to July, the hours consistently rise, peaking in May at 334 hours, painting a picture of a locale bathed in warmth and light. Even as the sun begins to fade slightly in September, it still boasts a commendable 323 hours of sunshine, ensuring that Arenal remains a favored destination for those seeking sun-drenched adventures year-round.

Monthly Sunshine Duration in Arenal: August Highlighted

The August sunshine duration represents the total number of hours Arenal experiences direct sunlight during the month of August, excluding cloudy or obstructed periods. This chart compares the sunshine duration of August with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec275h302h317h324h334h316h327h332h323h333h326h345h
Data source: Arenal August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Arenal During August

In Arenal, Peru, the likelihood of sunny weather in August is 41%, marking a slight dip from the previous month, July, which enjoys a more favorable 56% chance. This trend reflects a typical pattern as the weather transitions from the drier months of May and June, which boast sunny probabilities of 63% and 43% respectively. Following August, the chance of clear skies increases again in September to 49%, suggesting that while August may not be the sunniest of months, travelers can still expect a fair amount of sunshine amidst the lush backdrop of Arenal's stunning landscape. Overall, this moderate sun likelihood makes August a viable option for those looking to explore the region's natural beauty.

Percentage of Sunny Days in August in Arenal

The chart illustrates the percentage of sunny days in Arenal throughout the year, with August 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 Arenal experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec31%31%28%40%63%43%56%41%49%36%30%29%
Data source: Arenal August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Arenal in August

In Arenal, Peru, the daylight duration showcases a remarkable consistency throughout much of the year. From January to March, residents and visitors alike enjoy a generous 12 hours of daylight, perfect for outdoor exploration and enjoying the lush landscapes. However, as the months shift to April and extend through August, daylight slightly declines to 11 hours, creating a cozier atmosphere ideal for relaxing and unwinding. But come September, the daylight duration returns to 12 hours, signaling a welcome transition back to longer days. This rhythmic ebb and flow encapsulates Arenal's tropical charm, offering a diverse tapestry of experiences as the seasons change.

Average Daylight Hours in Arenal for August

The chart illustrates the variation in daylight duration in Arenal throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 21m12h 14m12h 6m11h 58m11h 52m11h 49m11h 51m11h 56m12h 4m12h 12m12h 19m12h 23m
Data source: Arenal daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Arenal

In Arenal, Peru, the August winds bring a gentle uptick in breeziness, averaging 3.9 m/s (9 mph), marking it as one of the windiest months alongside September and October. As the year progresses, there's a noticeable trend of increasing wind speeds from early summer onwards, peaking in late summer with these steady breezes. This is a delightful change from the lighter winds of March, which averages only 2.7 m/s (6 mph). The gradual increase into the fall season not only enhances the region’s enchanting landscapes but also invigorates outdoor adventures, making August an ideal time for those seeking a refreshing escape in nature's embrace.

Average August Wind Speed in Arenal

The chart displays monthly wind speed patterns in Arenal, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.33.42.73.43.63.73.63.9 m/s3.94.03.73.6
Data source: Arenal August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Arenal Compares to Other Months

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

August and January present distinct weather characteristics. In August, temperatures range from a minimum of 15°C (59°F) to a maximum of 27°C (82°F), with an average of 20°C (68°F). The month is notably dry, receiving only 1 mm of precipitation across 0 days and maintaining a humidity level of 71%. In contrast, January is warmer, with temperatures ranging from 19°C (66°F) to a maximum of 34°C (94°F) and an average of 25°C (78°F). This month sees more precipitation, totaling 10 mm over 3 days, and a higher humidity level of 89%. For more detailed information, visit Arenal weather in January.

August and February present strikingly different weather conditions. In August, temperatures range from a minimum of 15°C (59°F) to a maximum of 27°C (82°F), with an average of 20°C (68°F). This month is characterized by very little precipitation, averaging just 1 mm and experiencing no rainy days, along with a humidity level of 71%. In contrast, February boasts warmer temperatures, with a minimum of 20°C (68°F) and a maximum soaring to 34°C (94°F), averaging 26°C (80°F). This month sees significantly more rainfall, averaging 42 mm spread over six days, and higher humidity levels at 87%. For a closer look at the weather during this time, you can check Arenal weather in February.

When comparing the weather in August and March, it’s clear that March experiences significantly warmer conditions. In March, temperatures range from a minimum of 21°C (69°F) to a maximum of 35°C (95°F), with an average of 27°C (80°F). This month also sees considerable rainfall, with 93 mm (3.7 in) of precipitation spread over 8 days, contributing to a higher humidity level of 87%. In contrast, August offers much milder temperatures, with a minimum of 15°C (59°F), an average of 20°C (68°F), and a maximum of 27°C (82°F). Moreover, August is quite dry, receiving just 1 mm (0.0 in) of precipitation over 0 days, and exhibits relatively lower humidity at 71%. For a detailed look at the specific weather conditions, you can visit Arenal weather in March.

When comparing the weather in August and April, it's clear that April tends to be hotter and more humid. April boasts an average temperature of 25°C (78°F) with highs reaching up to 34°C (94°F), while August remains cooler with an average of 20°C (68°F) and maximum temperatures of 27°C (82°F). Furthermore, April experiences more precipitation, with 19 mm (0.8 in) over two days compared to August's dry climate, which sees no recorded rainfall. The humidity levels are also higher in April at 86%, compared to 71% in August. For more detailed information, you can check Arenal weather in April.

In comparison to August, May tends to be warmer, with average temperatures reaching 23°C (74°F) and maximums of 32°C (91°F), while August sees averages around 20°C (68°F) with a maximum of 27°C (82°F). Additionally, May experiences more precipitation, totaling 6 mm (0.2 in) over two days, compared to August's dry conditions with no recorded rainfall. Humidity levels remain higher in May at 89%, compared to 71% in August, contributing to a more muggy atmosphere during the earlier month. For further details on weather patterns, you can check out Arenal weather in May.

In comparing the weather of August and June, August tends to be cooler with an average temperature of 20°C (68°F), while June has a warmer average of 22°C (71°F). Interestingly, June also experiences higher maximum temperatures, reaching up to 31°C (87°F), compared to August's maximum of 27°C (82°F). Both months see very little precipitation, but June has slightly more with 2 mm, whereas August records only 1 mm. Additionally, humidity is higher in June at 84%, compared to 71% in August. For a detailed look at conditions, you can check out Arenal weather in June.

In comparing the weather of July and August, we observe that both months have similar temperature ranges, with July showing a minimum of 16°C (60°F) and an average of 20°C (69°F), while August features a slightly cooler minimum of 15°C (59°F) but maintains a consistent average of 20°C (68°F). Interestingly, both months recorded maximum temperatures of 27°C (82°F) and experienced negligible precipitation, with July seeing 1 mm (0.1 in) of rain and August recording just 1 mm (0.0 in), and both months having zero rainy days. Humidity levels remained constant at 71% throughout both months. For more detailed information, you can refer to Arenal weather in July.

August and September share similar temperature ranges, with August experiencing a minimum of 15°C (59°F) and an average of 20°C (68°F), while September sees slightly higher averages with a minimum of 15°C (60°F) and an average of 20°C (69°F). Notably, both months are characterized by minimal precipitation, recording just 1 mm (0.0 in) in August and 1 mm (0.1 in) in September, allowing residents and visitors to enjoy dry conditions throughout this period. Humidity levels increase slightly from 71% in August to 75% in September, indicating a gradual shift towards a more humid atmosphere as summer transitions into fall. For those interested in more specific weather details during this time, refer to Arenal weather in September.

In comparing the weather between August and October, August typically experiences slightly cooler temperatures with a minimum of 15°C (59°F) and an average of 20°C (68°F), reaching a maximum of 27°C (82°F). The month is characterized by minimal precipitation, with just 1 mm recorded and no rainy days, alongside a humidity level of 71%. In contrast, October warms up slightly, featuring a minimum temperature of 16°C (61°F) and an average of 21°C (70°F), peaking at 29°C (85°F). Although it sees a modest increase in precipitation to 4 mm, it still reports no rainy days, with humidity rising to 77%. For more details on the weather conditions during this month, you can check Arenal weather in October.

August and November present a contrast in weather characteristics, despite both months featuring a minimum temperature of 15°C (59°F). In August, the average temperature is slightly lower at 20°C (68°F), peaking at 27°C (82°F), with minimal precipitation of just 1 mm (0.0 in) and no rainy days, accompanied by a humidity level of 71%. In contrast, November experiences a warmer average of 21°C (70°F) and reaches a higher maximum of 30°C (86°F). This month also sees a slight increase in precipitation, totaling 5 mm (0.2 in) over one rainy day, alongside a higher humidity level of 79%. For a detailed look at the conditions, check out Arenal weather in November.

In August, the weather is relatively mild with a minimum temperature of 15°C (59°F) and an average of 20°C (68°F), reaching a pleasant maximum of 27°C (82°F). With hardly any precipitation at just 1 mm and no rainy days, the humidity sits at a comfortable 71%. In contrast, December sees warmer conditions with a minimum of 17°C (64°F) and an average temperature of 23°C (74°F), peaking at a hot 32°C (89°F). This month brings increased rainfall, totaling 16 mm over three days, and a higher humidity level of 86%. For more insights on the weather during this month, check out Arenal weather in December.

Compare Arenal's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Arenal

August in Arenal offers a delightful reprieve from the intense humidity and rainfall characteristic of other months. With an average temperature settling at a comfortable 20°C (68°F), this month stands out for its remarkable lack of precipitation, registering just 1 mm over 0 days. This dryness, coupled with a moderate humidity level of 71%, creates a perfect climate for outdoor exploration and adventure. Unlike the wetter months, August invites visitors to immerse themselves in the breathtaking landscapes without the interruptions of rain. For a deeper dive into how August fits into the overall climate of Arenal, check out Arenal Climate.