Monthly weather forecast and climate
Midway Island, USA

Flag of Midway Island, USA
Flag of Midway Island, USA

The climate of Midway Island

Midway Island has a tropical savanna type of climate (Köppen climate classification Aw), with lovely temperatures throughout the year. The atoll has pleasant summers and winters, with ample sunshine and year-round rainfall. Midway is an extension of the Pacific islands and the only one that is not part of the state of Hawaii. The island lies approximately midway between California and East Asia in the North Pacific Ocean and is part of the United States Minor Outlying Islands. The location near the Tropic of Cancer and proximity to the Pacific Ocean are the primary factors that influence the climate of the islands.

Midway Island or Midway Atoll mainly consists of two large islands, the Sand Island and the Eastern Island, with a small Spit Island separating them. The total land area is 2.4 square miles, with a beautiful coastline that spans 9.3 miles. The atoll has an almost flat terrain with many low and sandy islands, with the highest point at 13 meters above sea level. A 5-mile diameter barrier reef of coral encircles the islands and supports a diverse marine ecology. The island is a National Wildlife Refuge with more than 250 species of animals, birds, and marine life occupying the land, lagoon, and surrounding ocean waters. Prevailing easterly winds moderate the subtropical climate to a large extent.

Like all tropical islands in the Pacific Ocean, Midway Island has mainly two seasons. May to September is relatively dry and hot, while October to April is warm and accounts for two-thirds of the annual precipitation. Temperature variations are minimal and typically do not span above 10°F (-12.2°C) between day and night. Cloud cover and relative humidity increase during the wet period, but the conditions are tolerable. Extreme temperatures are highly uncommon, and it is rare for them to scale 90°F (32.2°C) or drop below 55°F (12.8°C). The Pacific Ocean engulfs the island, and the plentiful supply of fresh sea air keeps the climate pleasant.

The annual rainfall in Midway Island averages an ample 42" (1067mm) and is characteristic of the tropics. Precipitation occurs throughout the year with the driest months in May and June. Winter is the wettest season, but there is no specific dry season. The sun rays are directly overhead near the Tropic of Cancer, providing ample daylight hours. Sea temperatures remain between 68°F (20°C) to 81°F (27.2°C) and are mild to warm year-round. Wind speeds remain mostly below 15mph (24.1km/h) except during tropical storms.

The highest temperature on record for Midway Island is 92°F (33.3°C), and the lowest is 51°F (10.6°C).

The best time to visit Midway Island

The best time to visit Midway Island is in the relatively dry period between March to June. The days are sunny, and the rainfall is at the lowest of the year. The sea waters are calm, with temperatures registering between 68°F (20°C) to 75°F (23.9°C). The island and the surrounding waters are a protected environment and require a permit for visiting and staying. The dry period is the peak season of the seabird population on the island, including various species of albatrosses.

The worst time to visit Midway Island

The worst time to visit Midway Island, if there is any, is between September to December when the temperatures gradually drop and the cyclone season is in progress. Tropical cyclones regularly invade the coast and pose harsh questions. July to December is particularly prone to thunderstorms with lightning strikes and hurricanes. The precipitation is massive, and there is at least a 50% chance of rain every day.

Weather hazards

Midway Island is prone to thunderstorms, hurricanes, cyclones, and earthquakes. Wind speeds reach above 100mph (160.9km/h) with severe rainfall and lightning during tropical storms. Tropical cyclones routinely pose threats from July to December, and even the rest of the year is not out of their reach. Thunderstorms are a more significant threat than Pacific hurricanes. The location of the islands is susceptible to seismic activity as it extends the volcanic chain that begins from Hawaii and is subject to earthquakes of moderate magnitudes. A 2011 earthquake and resultant tsunami submerged reef inlets and Spit Island with large scale loss of nesting seabirds.

Weather in January

January is the wettest month of the year in Midway Island with 4.9" (124mm) of rainfall. The skies are partly cloudy, the relative humidity is high, and it rains for an average of 16 days in the month. Temperatures are comfortable during the cold season on the atoll, with the averages between in the mild range of 62°F (16.7°C) to 70°F (21.1°C). Weather in January »

Weather in February

February is the coldest month of the year in Midway Island, with the average temperatures in the mild 62°F (16.7°C) to 69°F (20.6°C) range. Temperature variations are little and rarely exceed 10°F (-12.2°C) as days and nights are pleasant with no exceptional weather events. Localized weather patterns in the surrounding waters pose significant influence on the weather. Weather in February »

Weather in March

March is the beginning of a relatively dry period in Midway Island with the rainfall registering an average of 3" (76mm). The conditions are pleasant, with day temperatures below 73°F (22.8°C) and nights above 60°F (15.6°C). Cold winds from the continent do not reach as far as the islands, keeping the conditions warm and desirable. The tropical waters average a mild 68°F (20°C), and the lagoon is teeming with various fishes that prosper in size due to the restriction on fishing. Weather in March »

Weather in April

April receives warm sunshine in Midway Island as the conditions gradually become dry with the decrease in rainfall. The average temperatures are in the warm range of 64°F (17.8°C) to 72°F (22.2°C) with daylight that lasts more than 13 hours. The precipitation averages 3" (76mm), but there is a marked decrease in the number of wet days in the month. Weather in April »

Weather in May

May is an excellent time to visit Midway Island as the dry season takes its hold on the surroundings. The precipitation averages 2.4" (61mm) with nine wet days in the month. The average temperatures are in the warm 67°F (19.4°C) to 75°F (23.9°C) range that makes much of the temperate weather accustomed visitors feel at home. Weather in May »

Weather in June

June is the driest month of the year in Midway Island with 2.1" (53mm) of rainfall. The average temperatures rise sharply to register in the warm 73°F (22.8°C) to 81°F (27.2°C) range. The low-lying landscape is panoramic, and the bright daylight hours aids in taking clear photographs. Weather in June »

Weather in July

July sees a rise in wetness in Midway Island as the rainfall registers a significant 3.4" (86mm). Precipitation is due every alternate day, and showers occur regularly during the afternoons. Thunderstorms are active in the region due to localized weather patterns and frequently bring lightning and rain along with them. Weather in July »

Weather in August

August is usually the hottest month of the year in Midway Island, with the average temperatures in the range of 76°F (24.4°C) to 84°F (28.9°C). Very few days register above the 90°F (32.2°C) barrier, and the record for the month remains at 92°F (33.3°C). The rainfall averages 4.3" (109mm) with 15 rainy days in the month. Weather in August »

Weather in September

September is a warm month in Midway Island with the average temperatures in the 75°F (23.9°C) to 84°F (28.9°C) range. The days see bright sunshine with patches of cloudy and wet weather. The atoll receives 3.8" (97mm) of rainfall during 15 wet days in the month that are prone to thunderstorms and tropical storms. Weather in September »

Weather in October

October sees a moderate drop in temperatures in Midway Island with the averages registering in the warm 73°F (22.8°C) to 80°F (26.7°C) range. The hot and dry season gives way to pleasant conditions with gentle breezes in the evenings. The average precipitation is 3.8" (97mm) in October, but the tropical storm season is not yet over. Weather in October »

Weather in November

November sees average temperatures between 69°F (20.6°C) to 76°F (24.4°C) in Midway Island as the weather tends to be on the mild side. Afternoon showers frequently occur on the islands, and there is hardly a period when a couple of days pass without rain. Weather in November »

Weather in December

December is pleasant in Midway Island, with the average temperatures in the 65°F (18.3°C) to 73°F (22.8°C) range. Sixteen wet days in the month accumulate an average of 4.1" (104mm) of rainfall. There is no shortage of daylight with at least 11 hours of daily sunshine. Weather in December »
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