Last updated: August 21, 2025
In May, Pago Pago, American Samoa experiences a warm tropical climate with maximum temperatures reaching 29°C (85°F) and an average of 27°C (81°F). The weather is marked by high humidity levels at 80%, creating a lush environment that thrives under these conditions. However, visitors should prepare for the likelihood of rain, as the area sees an average of 210 mm (8.3 in) of precipitation over 25 days. This combination of warmth and moisture contributes to the vibrant flora and fauna of the region, making it a unique destination for nature enthusiasts.
In Pago Pago, American Samoa, the month of May continues the trend of warm, tropical temperatures that the region is known for. With minimum temperatures consistently at 25°C (77°F) and an average of 27°C (81°F), the climate remains inviting for both locals and visitors alike. The maximum temperature reaches 29°C (85°F), making it perfect for outdoor activities under the sun. Interestingly, May follows a pattern established in the previous months, where temperatures remain stable and pleasant, with only slight variations as the season transitions into June. This reliable warmth allows for endless opportunities to explore the stunning landscapes and vibrant culture of American Samoa.
In May, Pago Pago, American Samoa, experiences a moderate level of precipitation with an average rainfall of 210 mm (8.3 in) recorded over approximately 25 days. This marks a slight decrease from the significantly wetter months of January and February, which topped the charts with 301 mm (11.8 in) and 464 mm (18.3 in), respectively. As the season transitions towards the drier months, rainfall begins to taper off, yet the consistent 25 rainy days in May illustrate the tropical climate's persistence. Notably, this trend of high rainfall in the first half of the year is punctuated by more gradual declines as the region moves into August and September, where monthly accumulations plummet to 128 mm (5.1 in) and 136 mm (5.4 in). This wet and dry oscillation not only shapes the lush landscapes of Pago Pago but also underscores the dynamic climate that characterizes this vibrant island paradise.
In May, Pago Pago experiences a slight uptick in humidity, reaching 80%, which mirrors the comfort levels of the preceding months. This consistent humidity trend, hovering around the high 70s to low 80s throughout the year, suggests a tropical climate that remains relatively stable. As the island transitions from May into the warmer months, humidity levels steadily increase, peaking at 85% in October. The gradual rise from 79% in April to 83% by August indicates a subtle but persistent trend of higher moisture levels, enhancing the lush, vibrant nature for which American Samoa is renowned. Overall, the humidity maintains a warm embrace, creating an atmosphere that's both inviting and refreshing.
In May, the UV Index in Pago Pago reaches a significant level of 11, classified as extreme, with a quick burn time of just 10 minutes. This marks a gradual decline from the peak indices of 16 observed in the earlier months of January through March. However, May still maintains a strong potential for skin damage if proper precautions are not taken. As we transition towards the mid-year months, the UV Index begins to dip slightly, with June and July showing a slightly lower index of 9, classified as very high. Nevertheless, the continued warning of extreme exposure during May emphasizes the importance of sun safety in this tropical paradise. For more detailed information, check out the Pago Pago UV Index.
UV Risk Categories
May in Pago Pago, American Samoa, bathes its visitors in 281 hours of sunshine, marking a delightful transition into the dry season. This month continues the trend of impressive sun exposure that begins in March with a remarkable 310 hours, peaking before gradually tapering off in the following months. As spring blossoms into early summer, each month shows a promising consistency in sunshine, with only minor variations—April experiences 272 hours while June sees a slight decrease to 264 hours. The sunny embrace of May contributes to a vibrant outdoor atmosphere, encouraging exploration of the lush landscapes and rich culture of this tropical paradise.
In May, Pago Pago, American Samoa, enjoys a notable uptick in sunny weather, with a 58% chance of sunshine that marks a significant improvement from earlier months. This shift follows the trend of increasing sunlit days, as April's 42% makes way for May's vibrant skies. The pattern continues, leading into July, which boasts the highest likelihood of sun at 64%. As the year progresses, the region transitions from its cooler, cloudier months toward summer, where the chances of basking in the sun rise dramatically. September stands out with a remarkable 75%, ensuring that the island's lush landscapes are drenched in plenty of daylight. Overall, May presents a delightful precursor to the sunny days ahead, inviting outdoor adventures and relaxation under clear blue skies.
In Pago Pago, American Samoa, the daylight duration exhibits a consistent pattern throughout the year. From January to March, residents enjoy a generous 12 hours of daylight, perfect for outdoor activities and soaking up the sun. As April arrives, there's a slight shift to 11 hours, which continues through the subsequent months of May, June, July, and August, creating a stable, warm atmosphere ideal for relaxation. Interestingly, September marks a return to 12 hours of daylight, signaling the gradual transition back to longer days as the year progresses from fall into the vibrant months of October, November, and December, where daylight once again stabilizes at 12 hours. This rhythm of light not only enhances the natural beauty of the islands but also enriches the lifestyle of its inhabitants.
In May, Pago Pago experiences an average wind speed of 5.0 m/s (11 mph), marking a slight uptick from the calmer breezes of April. As the island transitions into the dry season, the winds begin to pick up, hinting at the approach of the summer months. This moderate wind in May serves as a precursor to the stronger gusts that follow in June and July, where speeds rise significantly to 5.6 m/s (13 mph) and 7.3 m/s (16 mph) respectively. While May stands out for its gentle yet refreshing breezes, it also reflects a seasonal trend where the winds gradually build up, preparing the island for the more robust conditions ahead. As such, May acts as a gentle bridge between the quieter spring days and the vibrant summer winds that characterize Pago Pago's unique climate.
Weather in Pago Pago varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Pago Pago, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of May and January, both months share similar temperature ranges, with minimums at 25°C (77°F), averages around 27°C (81°F), and maximums reaching 29°C (85°F). However, January tends to be slightly wetter, recording 301 mm (11.8 in) of precipitation over 23 days, compared to May's 210 mm (8.3 in) over 25 days. The humidity levels are also quite comparable, with May at 80% and January just a notch lower at 79%. For more detailed insights, you can check Pago Pago weather in January.
May and February exhibit similar average temperatures, with May having a minimum of 25°C (77°F) and a maximum of 29°C (85°F), while February has a min of 24°C (76°F) and max of 30°C (86°F). However, February stands out with significantly higher precipitation, receiving 464 mm (18.3 in) of rain over 25 days compared to May's 210 mm (8.3 in) on the same number of days. Both months experience high humidity levels of 80%, making the air feel quite muggy. For those interested in detailed weather information for February, you can check out Pago Pago weather in February.
In comparing the weather of March and May, both months exhibit similar temperature ranges, with minimum temperatures around 25°C (77°F), average temperatures of approximately 27°C (81°F), and maximum temperatures peaking at 29°C (85°F). However, May tends to see slightly increased precipitation, with 210 mm (8.3 in) compared to March's 195 mm (7.7 in), despite both months experiencing rainfall on about 25 days. Humidity levels are also fairly close, with May at 80% and March at 79%. For more detailed insights about March in particular, you can check Pago Pago weather in March.
In comparing the weather of May and April, we notice that both months have similar temperature ranges, with a minimum of 25°C (77°F), an average of 27°C (81°F in May, 82°F in April), and a maximum of 29°C (85°F) for both. However, May experiences slightly less precipitation, totaling 210 mm (8.3 in) over 25 days, compared to April's 228 mm (9.0 in) over the same number of days. Humidity levels are also comparable, with May at 80% and April slightly lower at 79%. For more detailed insights into April's weather, you can check Pago Pago weather in April.
May and June showcase similar temperature patterns, with both months maintaining an average of 27°C (81°F) and peak temperatures reaching 29°C (85°F). However, May experiences higher precipitation, with 210 mm (8.3 in) falling over 25 days, compared to June's 178 mm (7.0 in) spread across 23 days. Humidity remains consistent at 80% for both months, creating a humid atmosphere. For more details on the weather conditions in June, you can visit Pago Pago weather in June.
In comparing the weather between May and July, we see similar average temperatures, with May experiencing a slightly higher minimum and maximum temperature range. In May, temperatures range from a minimum of 25°C (77°F) to a maximum of 29°C (85°F), while July has a minimum of 24°C (76°F) and a maximum of 28°C (83°F). Precipitation is notably higher in May, with 210 mm (8.3 in) spread over 25 days, compared to July's 152 mm (6.0 in) over 24 days. Humidity levels remain fairly consistent, with May at 80% and July slightly higher at 81%. For more detailed insights, you can check Pago Pago weather in July.
May and August in Pago Pago exhibit warm temperatures with only slight variations. In May, the average temperature hovers around 27°C (81°F), featuring a minimum of 25°C (77°F) and a maximum of 29°C (85°F). This month also sees higher precipitation levels of 210 mm (8.3 in) spread over 25 days, contributing to a humidity level of 80%. In contrast, August experiences slightly cooler averages, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 28°C (83°F) and an average of 26°C (80°F). Precipitation in August decreases to 128 mm (5.1 in) over 20 days, accompanied by a marginally higher humidity of 83%. For more detailed weather information, you can visit Pago Pago weather in August.
May and September share similar temperature profiles, both featuring a minimum of 25°C (77°F) and an average temperature around 27°C (81°F). However, May typically sees slightly higher maximum temperatures, reaching up to 29°C (85°F), compared to September's peak of 28°C (83°F). Precipitation patterns also differ significantly; May is wetter with 210 mm (8.3 in) of rainfall over 25 days, while September has less precipitation at 136 mm (5.4 in) across 21 days. Humidity levels remain high in both months, with September being marginally more humid at 84% compared to May's 80%. For more detailed insights on September's weather, you can check out Pago Pago weather in September.
In comparing the weather between May and October, both months exhibit similar temperature ranges, with minimums at 25°C (77°F), averages around 27°C (81°F), and maximums reaching 29°C (85°F) in May and slightly lower at 29°C (84°F) in October. However, October tends to be slightly wetter, accumulating around 225 mm (8.9 in) of precipitation over 23 days, while May receives 210 mm (8.3 in) across 25 days. Additionally, humidity levels are marginally higher in October at 85%, compared to 80% in May. For more detailed information, you can check Pago Pago weather in October.
In comparing the weather between May and November, both months exhibit similar average temperatures, with May showing a minimum of 25°C (77°F) and a maximum of 29°C (85°F), while November features a slightly lower maximum of 29°C (84°F) and a minimum of 24°C (76°F). The humidity levels remain relatively consistent, with May at 80% and November slightly higher at 82%. However, November experiences more precipitation, totaling 266 mm (10.5 in) over 24 days compared to May's 210 mm (8.3 in) over 25 days. This makes November relatively wetter than May. For more details, you can check Pago Pago weather in November.
May and December in Pago Pago exhibit similar average temperatures, both hovering around 27°C (81°F), with minimum and maximum temperatures showing little variation. However, December tends to be wetter, receiving 360 mm (14.2 in) of precipitation on 29 days compared to May's 210 mm (8.3 in) over 25 days. The humidity levels are also slightly higher in December at 82%, compared to 80% in May, contributing to a more humid atmosphere. For a detailed look at December conditions, you can check Pago Pago weather in December.
As May rolls into Pago Pago, the tropical charm of this vibrant locale shines through, showcasing warm temperatures that contrast with the cooler months of the year. With average highs hovering around 27°C (81°F) and a comfortable minimum of 25°C (77°F), it's an inviting time for outdoor adventures. However, this month witnesses a surge in precipitation, with rain gracing about 25 days, creating a lush landscape and an 80% humidity level that adds to the tropical experience. While other months may offer drier spells, May's blend of warmth and moisture contributes to the island's rich biodiversity. Discover more about how the weather in May fits into the broader climate pattern by visiting Pago Pago Climate.