May weather forecast
Guam, USA

May signals the culmination of the dry season in Guam, serving as a transitionary period into the wetter months of the year. Temperatures in May tend to fluctuate between 79°F (26.1°C) and 88°F (31.1°C). This month represents one of the last opportunities for residents and tourists to take full advantage of the drier climate before the onset of the more humid and rainy conditions.

Across Guam's compact landscape, the rise in warmth is felt consistently. The month's end often witnesses an uptick in humidity levels, indicative of the imminent wet season. May stands out as the bridge between the comfortable temperatures of April and the notably warmer conditions of the following months.

While May is still relatively dry, occasional rainfall begins to make its presence felt, preparing the island for the forthcoming wet season. The dependable northeast trade winds, with speeds ranging from 10mph (16.1km/h) to 20mph (32.2km/h), persist in their role of moderating the island's climate. These winds ensure that even as temperatures rise, there's a soothing breeze to counterbalance the warmth.

The waters surrounding Guam continue to warm up in May, drawing in both locals and tourists for marine activities. As the month draws to a close, one can anticipate the heavier rainfall and heightened humidity that June will usher in, marking the beginning of the wet season in earnest.

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• Hagåtña - May »
  The months with the highest humidity are January, March through May, October through December, with an average relative humidity of 78%. The months with the highest UV index in Hagåtña are January through August, October through December, with an average maximum UV index of 7.
• Dededo - May »
  The months with the highest humidity in Dededo are January, March through May, October through December, with an average relative humidity of 78%. January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Dededo.
• Santa Rita - May »
  January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Santa Rita, Guam. January, March through May, October through December, with an average relative humidity of 78%, are the most humid months in Santa Rita.
• Agat - May »
  January, March through May, October through December, with an average relative humidity of 78%, are the most humid months in Agat, Guam. January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Agat, Guam.
• Piti - May »
  The months with the highest humidity in Piti are January, March through May, October through December, with an average relative humidity of 78%. The months with the highest humidity in Piti are January, March through May, October through December, with an average relative humidity of 78%.
• Talofofo - May »
  The months with the highest humidity in Talofofo are January, March through May, October through December, with an average relative humidity of 78%. The months with the highest UV index in Talofofo are January through August, October through December, with an average maximum UV index of 7.
• Inarajan - May »
  The months with the highest humidity in Inarajan are January, March through May, October through December, with an average relative humidity of 78%. The months with the highest UV index in Inarajan are January through August, October through December, with an average maximum UV index of 7.
• Merizo - May »
  January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Merizo, Guam. On the last day of the month, in Merizo sunrise is at 5:53 am and sunset at 6:44 pm ChST.
• Umatac - May »
  The months with the highest humidity in Umatac are January, March through May, October through December, with an average relative humidity of 78%. In Umatac in May, during 23.1 rainfall days, 3.31" (84mm) of precipitation is typically accumulated.
• Guam National Wildlife Refuge - May »
  On the first day of May in Guam National Wildlife Refuge, sunrise is at 5:59 am and sunset at 6:36 pm. On the first day of May in Guam National Wildlife Refuge, Guam, sunrise is at 5:59 am and sunset at 6:36 pm.