Climate and Average Weather in Northern Mariana Islands

The Northern Mariana Islands have a tropical rainforest climate, where there is a dry season and a wet period with significant amounts of rainfall. The dry season begins in December and continues into June. During this period, there is less precipitation than during the rainy season, which lasts from July through November. The months of August and September are the wettest months of the year, averaging 300 to almost 400 millimetres (11.8 - 15.7 inch).

The Northern Mariana Islands lie in an area where tropical cyclones can occur. These form over the Pacific Ocean in the second half of the year and can occasionally come near the Northern Mariana Islands. The hurricane season is approximately from June to December, but cyclones can occur outside of this period. The winds during cyclones can be enormously powerful, with devastating consequences.

The best time to go to the Northern Mariana Islands is from January to May. These are the months with the least amounts of rain and the smallest chance of hurricanes.

Interested in more detailed Weather and Climate information?
Please select the city below you wish to travel to, or the one closest to your destination. Each selected city will show you the following graphs:
1. Average minimum and maximum temperature over the year
2. Average monthly precipitation over the year (rainfall, snow)
3. Average monthly hours of sunshine over the year
On certain pages we also offer other historical weather data like humidity, wind speed and water temperature.

Popular places in Northern Mariana Islands

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Islands of Northern Mariana Islands