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Climate - Micronesia


Average weather, temperature, rainfall, when to go, what to pack

Flag - Micronesia

Map - Micronesia


Index


  • Introduction - Palikir, Yap, Chuuk
  • Cyclones
  • Best Time
  • What to pack

Introduction



In the Federated States of Micronesia, the climate is equatorial, ie hot, humid and rainy throughout the year.
The temperature is definitely stable throughout the year, around 22/25 °C (72/77 °F) at night and 30/32 °C (86/90 °F) during the day; it rarely drops below 20 °C (68 °F), while it can sometimes reach 34/35 °C (93/95 °F).
The islands are located just north of the Equator, and are affected by the trade winds, constant winds that are able to temper a bit the heat. From a geographical point of view, they are called Caroline Islands, together with the islands of Palau.
Annual precipitation is abundant, and ranges from 2,500 to 5,000 millimeters (100 to 200 inches), but on the windward slopes of the larger islands (such as Pohnpei and Kosrae), which host some elevations in the interior, it can exceed 6,000 mm (235 in) per year, that is, as high as six meters (20 feet)! Mount Nahnalaud, 750 meters (2,450 ft) high, on the island of Pohnpei, is one of the wettest places on Earth, with 10,160 mm (400 in) of rain per year, and it is often covered with clouds.
Given the frequent rains, the amount of sunshine is never excellent on average, but it is neither too low, in fact, the rains occur in the form of intense but short showers and thunderstorms. However, the sun tends to be more frequent in the less rainy months.
The driest islands are the flat atolls, where there are no hills and mountains which could enhance the formation of thunderclouds: in these cases, precipitation can drop below 4,000 mm (157 in) per year, and in some cases, even below 3,000 mm (118 in).
However, since the country is affected by the so-called ENSO cycle, the rainfall pattern is quite irregular from year to year. In particular, the phenomenon known as El Niño can cause drought in this area of the Pacific.

Palikir

Here are the average temperatures of the capital, Palikir, located at 7 degrees north latitude, on the island of Pohnpei (ex Ponape).
Palikir - Average temperatures
MonthMin (°C)Max (°C)Mean (°C)Min (°F)Max (°F)Mean (°F)
January233026.5738679.7
February243027758680.6
March233026.5738679.7
April233026.5738679.7
May233026.5738679.7
June223026728678.8
July223126.5728879.7
August223126.5728879.7
September223126.5728879.7
October223126.5728879.7
November223126.5728879.7
December233026.5738679.7
Year22.630.426.4572.686.879.5

Palikir receives almost 4,800 mm (190 in) of rain per year, with a minimum of 260 mm (10.2 in) in February and a maximum of 490 mm (19.3 in) in May. Here is the average precipitation.
Palikir - Average precipitation
MonthMillimetersInchesDays
January30011.821
February26010.219
March36014.220
April44017.320
May49019.320
June43016.919
July44017.322
August42016.522
September40015.720
October41016.121
November40015.720
December40015.721
Year4750187245

The sea in Micronesia is pleasantly warm all year round, and has a very stable temperature, as we can see in the following table.
Palikir - Sea temperature
MonthCelsius (°C)Fahrenheit (°F)
January2984
February2984
March2984
April2984
May2984
June2984
July2984
August2984
September2984
October2984
November2984
December2984
Year2984.2

Pohnpei

Yap

On the westernmost island, Yap, located at 9 degrees north latitude, 3,000 mm (118 in) of rain fall per year. The period from February to April is (relatively) less rainy, since rainfall does not exceed 150 mm (6 in) per month, which, however, is still a considerable amount. Here is the average rainfall.
Yap - Average precipitation
MonthMillimetersInchesDays
January1857.317
February1505.913
March1505.914
April1455.713
May2309.117
June32012.620
July37014.621
August38515.221
September34513.619
October3051220
November2309.119
December2309.118
Year3045119.9212

In Yap too, the temperatures are very stable and high throughout the year.
Yap - Average temperatures
MonthMin (°C)Max (°C)Mean (°C)Min (°F)Max (°F)Mean (°F)
January243026.8748680.2
February243026.8748680.3
March243127.6758881.6
April243127.6758881.8
May243127.4758881.2
June243127.2748780.9
July233127748780.6
August233127.1748780.8
September243127.2748881
October243127.3758881.1
November243027.1758780.8
December243127.2758781
Year23.730.727.1574.687.381

The sun in Yap shines more often in the first months of the year, ie in the least rainy period. Here are the average sunshine hours per day.
Yap - Sunshine hours
MonthAverageTotal
January7210
February7.5210
March8250
April8.5255
May8245
June6.5200
July6190
August5.5175
September6180
October5.5170
November6.5190
December6.5200
Year6.82480

Chuuk

In the state of Chuuk (called Truk until 1990), located further to the east, between Yap and Pohnpei, rainfall amounts to 3,500 mm (138 in) per year. The least rainy period is from January to March, in which, however, rainfall does not drop below 200 mm (8 in) per month. Here is the average rainfall in Weno, the state capital.
Weno - Average precipitation
MonthMillimetersInchesDays
January2459.620
February2058.117
March2359.319
April32012.621
May31512.424
June3301325
July33513.225
August36014.224
September36514.422
October2801123
November29011.423
December27510.822
Year3545139.6265

In Weno too, the temperatures are very stable and high throughout the year.
Weno - Average temperatures
MonthMin (°C)Max (°C)Mean (°C)Min (°F)Max (°F)Mean (°F)
January243127.5768781.5
February253027.4768681.3
March253027.6768781.6
April253127.6768781.8
May243127.7768881.9
June243127.6768781.6
July243127.4758881.3
August243127.2748780.9
September243127.4758881.2
October243127.4748881.4
November243127.8768882
December243127.5758881.5
Year24.230.827.4575.687.481.5

On the southern island of Nukuoro, located at 4 degrees north latitude, precipitation amounts to 4,000 mm (157 in) per year, though the pattern is different because the rainfall drops below 300 mm (12 in) per month from September to December.
Nukuoro - Average precipitation
MonthMillimetersInchesDays
January3801517
February34013.415
March39515.618
April39015.419
May37014.620
June3301319
July37014.618
August32512.817
September2801116
October26010.215
November27010.616
December27010.616
Year3980156.7206

More to the south, in Kapingamarangi, located just 1 degree north of the Equator, rainfall amounts to 3,000 mm (118 in), and it drops below 250 mm (10 in) from August to December, and below 200 mm (8 in) in September and October.

Tropical cyclones



Micronesia can be affected by the tropical cyclones of the North Pacific Ocean, known in this area as typhoons. Typically, typhoons occur from April to December, although they are more frequent between August and November. However, since the sea is always warm, they can sometimes also occur from January to March, although tropical depressions that are formed during this period are usually not intense.
An exception is represented by the southern atoll of Kapingamarangi, which is sheltered from typhoons because it's located practically at the Equator (or at worst, it can be affected in a marginal way).

Best Time



The best times to visit Micronesia are the driest ones (or rather the least rainy): from February to April on the westernmost islands (Yap Islands) and from January to March on the central-eastern islands (Eastern Caroline Islands). Typically, February is the least rainy month of all.

What to pack



All year round, bring tropics-friendly, loose-fitting clothing, a sun hat, a scarf for the breeze, a light sweatshirt for the evening, a light raincoat or umbrella.

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