October weather forecast
Guam, USA

October in Guam signifies the transitioning phase from the wet to the dry season. The month's temperatures are generally between 81°F (27.2°C) and 88°F (31.1°C). While rainfall continues to be a dominant feature, there's a noticeable decrease in its frequency and intensity as October progresses.

Throughout Guam, the effects of the diminishing wet season become more apparent. The constant rain-soaked landscapes of the previous months begin to experience slightly prolonged dry spells, offering the flora and fauna of the region a reprieve. The contrast with September's heavier rains becomes clearer as October moves forward, signaling a shift towards drier times.

The frequency of rain during October is reduced in comparison to the peak wet months. Still, sporadic showers remain common. The unwavering northeast trade winds, moving from 10mph (16.1km/h) to 20mph (32.2km/h), maintain their role in moderating the island's environment, granting periodic relief from humidity and the occasional rainfall.

The surrounding ocean waters around Guam, while consistently warm, become a tad more placid as the weather slowly stabilizes. Nevertheless, those engaging in marine activities should remain cautious, especially during the early part of the month, when sporadic storm events might still occur. As October draws to a close, the island edges closer to the onset of the dry season, ushered in by the relatively calmer and drier conditions of November.

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• Hagåtña - October »
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• Dededo - October »
  The months with the highest humidity in Dededo are January, March through May, October through December, with an average relative humidity of 78%. The months with the highest humidity in Dededo are January, March through May, October through December, with an average relative humidity of 78%.
• Santa Rita - October »
  January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Santa Rita, Guam. The months with the highest UV index in Santa Rita are January through August, October through December, with an average maximum UV index of 7.
• Agat - October »
  The months with the highest humidity in Agat are January, March through May, October through December, with an average relative humidity of 78%. January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Agat, Guam.
• Piti - October »
  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 UV index in Piti are January through August, October through December, with an average maximum UV index of 7.
• Talofofo - October »
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• Inarajan - October »
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• Merizo - October »
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• Umatac - October »
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• Guam National Wildlife Refuge - October »
  On the first day of October in Guam National Wildlife Refuge, sunrise is at 6:09 am and sunset at 6:10 pm. When are sunrise and sunset in October in Guam National Wildlife Refuge?