September weather forecast
Northern Mariana Islands, USA

September in the Northern Mariana Islands continues to be dominated by the wet season, exhibiting weather patterns consistent with the preceding months of heavy rainfall. There are no notable variations in climate among the different locations within the islands.

Temperatures in September range from 83°F (28.3°C) to 85°F (29.4°C), remaining consistent with the temperatures in August. The rainfall, although still significant, may show slight signs of abating as the islands progress towards the latter part of the wet season. Hurricanes and tropical storms remain a possibility, though their frequency may begin to decrease slightly.

Comparing September to August, the weather conditions remain largely similar, with minor reductions in rainfall and storm activity. As the islands move into October, the continuation of the wet season ensures that weather patterns remain largely consistent, but with gradual shifts towards the season's end. September's weather, while still characterized by the wet season's intensity, marks a subtle transition towards the eventual easing of weather conditions in the Northern Mariana Islands.

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• Saipan - September »
  The months with the highest UV index are February through September, with an average maximum UV index of 12. In Saipan in September, the average water temperature is 84.2°F (29°C).
• Rota - September »
  In Rota during September, the rain falls for 20 days and regularly aggregates up to 13.58" (345mm) of precipitation. February through September, with an average maximum UV index of 12, are months with the highest UV index in Rota, Northern Mariana Islands.
• Tinian International Airport - September »
  In Tinian International Airport in September, it is raining for 20 days, with typically 12.8" (325mm) of accumulated precipitation. September is the month with the most rainfall in Tinian International Airport, Northern Mariana Islands.