October weather forecast
Guam, USA

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Flag of Guam, USA
Flag of Guam, USA

Weather in October

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.

  • Hagåtña - October »
    January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Hagåtña, Guam. The nighttime temperature demonstrates a marginal decline, averaging at a still warm 82.6°F (28.1°C) during October.
  • Dededo - October »
    January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Dededo, Guam. January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Dededo, Guam.
  • Santa Rita - October »
    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. January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Santa Rita.
  • 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%. October predicts the onset of cooler months in Agat and also represents a respite from the high rainfall of previous months.
  • 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%. January, March through May, October through December, with an average relative humidity of 78%, are the most humid months in Piti.
  • Talofofo - October »
    January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Talofofo, Guam. October brings Talofofo into the heart of autumn with a substantial increase in wind speed from 9.9mph (15.9km/h) in September to 11.2mph (18km/h), reinforcing the changing weather environment.
  • Inarajan - October »
    January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Inarajan. January, March through May, October through December, with an average relative humidity of 78%, are the most humid months in Inarajan.
  • Merizo - October »
    The months with the highest humidity in Merizo are January, March through May, October through December, with an average relative humidity of 78%. In October, the average heat index, which takes the relative humidity and factors it into the air temperature reading, is calculated to be 95°F (35°C).
  • Umatac - October »
    January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Umatac, Guam. In Umatac in October, during 28.7 rainfall days, 8.46" (215mm) of precipitation is typically accumulated.
  • Guam National Wildlife Refuge - October »
    In Guam National Wildlife Refuge in October, the average water temperature is 85.1°F (29.5°C). What is the water temperature in October in Guam National Wildlife Refuge?
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Guam, USA

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