The climate of the Marshall Islands is tropical, with high humidity, and an average yearâ€‘round temperature of 81°F. Trade winds pick up in October or November and blow strongly from January through April, with winds varying from 12 to 22 knots. The trades, often bringing overcast skies, have a cooling effect, although the lagoon can become rough, compared to the placid days of glassy water, so frequent in summer.
Typhoon (tropical hurricane) season is from December through March. Tropical depressions form in the Marshall Islands and increase to typhoon strength as they move further west with the prevailing trade winds, making the Marshall Islands less susceptible to a full strength typhoon than most islands in the Pacific.
In Majuro, January, February, and March are traditionally the driest months, with rainfall averaging 6-8 inches a month. September through December are the wettest months, with 12-14 inches of average monthly rainfall. The temperature remains stable year-round, averaging 84°F in the day and 76°F at night.
The Marshall Islands enjoy clean air, clear ocean water, sunshine, and adequate amounts of rainfall, with the exception of the heavily populated areas of Majuro and Ebeye, where city living has taken its toll on the environment. Water shortages occur at any time when rainfall has been below normal, but in Majuro, shortages will occur most toward the end of the dry season in March. The use of water catchment devices is being promoted throughout the Marshall Islands. The outer islands rely more on a subsistence economy, occasionally experiencing food shortages due to seasonal variation.