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 sometimes it can reach 34/35 °C (93/95 °F).
Here are the average temperatures of the capital Palikir.
Average temperatures - Palikir

Palikir	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Palikir	J	F	M	A	M	J	J	A	S	O	N	D
Min (°C)	23	24	23	23	23	22	22	22	22	22	22	23
Max (°C)	30	30	30	30	30	30	31	31	31	31	31	30
Min (°F)	73	75	73	73	73	72	72	72	72	72	72	73
Max (°F)	86	86	86	86	86	86	88	88	88	88	88	86

The islands are located just north of the Equator, and are affected by the trade winds, constant winds which 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.
The amount of sunshine is never excellent, given the frequent rains, but neither it is too low, as the rains occur in the form of short and intense showers and thunderstorms. However, the sun tends to be more frequent in the less rainy months.
The annual precipitation is abundant, and ranges from 2,500 to 5,000 millimetres (100 to 200 inches), but in the windward slopes of the larger islands (such as Pohnpei and Kosrae), in which there are some elevations in the interior, it can exceed 6,000 mm (235 in) per year, that is, six metres (20 feet)! Mount Nahnalaud, 750 metres (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.
The capital Palikir, in the island of Pohnpei (ex Ponape), 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.
Average precipitation - Palikir

Palikir	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Palikir	J	F	M	A	M	J	J	A	S	O	N	D	Y
Prec. (mm)	300	260	360	440	490	430	440	420	400	410	400	400	4750
Prec.(in)	11.8	10.2	14.2	17.3	19.3	16.9	17.3	16.5	15.7	16.1	15.7	15.7	187
Days	21	19	20	20	20	19	22	22	20	21	20	21	245

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, the rainfall pattern is quite irregular from year to year, because the country is affected by the so-called ENSO cycle: in particular, the phenomenon known as El Niño can cause drought in this area of the Pacific.

In the westernmost island, Yap, 3,000 mm (118 in) of rain per year fall; 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.
Average precipitation - Yap

Yap	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Yap	J	F	M	A	M	J	J	A	S	O	N	D	Y
Prec. (mm)	185	150	150	145	230	320	370	385	345	305	230	230	3045
Prec.(in)	7.3	5.9	5.9	5.7	9.1	12.6	14.6	15.2	13.6	12	9.1	9.1	119.9
Days	17	13	14	13	17	20	21	21	19	20	19	18	212

In Yap the sun shines more often in the first months of the year, ie in the less rainy period.
Sunshine - Yap

Yap	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Yap	J	F	M	A	M	J	J	A	S	O	N	D
Sun (hours)	7	8	8	8	8	7	6	6	6	6	6	6

In Chuuk, rainfall totals 3,500 mm (138 in) per year, with a minimum of 170 mm (6.7 in) in February, and a maximum of 360 mm (14 in) in May. From January to March, precipitation drops below 250 mm (10 in) per month.
In the southern island of Nukuoro, rainfall amounts to 4,000 mm (157 in) per year, though the pattern is different, because it drops below 300 mm (12 in) per month from September to December.
Average precipitation - Nukuoro

Nukuoro	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Nukuoro	J	F	M	A	M	J	J	A	S	O	N	D	Y
Prec. (mm)	380	340	395	390	370	330	370	325	280	260	270	270	3980
Prec.(in)	15	13.4	15.6	15.4	14.6	13	14.6	12.8	11	10.2	10.6	10.6	156.7
Days	17	15	18	19	20	19	18	17	16	15	16	16	206

In the even more southern Kapingamarangi, 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.



The sea in Micronesia is pleasantly warm all year round, and has a very stable temperature, as we can see in the following table.
Sea temperature - Palikir

Palikir	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Palikir	J	F	M	A	M	J	J	A	S	O	N	D
Sea (°C)	29	29	29	29	29	29	29	29	29	29	29	29
Sea (°F)	84	84	84	84	84	84	84	84	84	84	84	84

Micronesia can be affected by 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, sometimes they can also occur from January to March, although usually during this period tropical depressions not intense are formed.
An exception is represented the southern atoll of Kapingamarangi, which is sheltered from typhoons, because it's located practically at the Equator (or at most it can be affected in a marginal way).


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


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