Average weather, temperature, rainfall, when to go, what to pack
In Guam, an island administered by the United States, which is located in the western Pacific Ocean between the equator and the tropic of Cancer, and geographically is part of Micronesia, the climate is
tropical, hot and humid all year round, with temperatures around 30/32 °C (86/90 °F) during the day, and 24/25 °C (75/77 °F) at night.
Here are the average temperatures of Tamuning.
Tamuning - Average temperatures| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|
| Min (°C) | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
|---|
| Max (°C) | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 |
|---|
| Min (°F) | 75 | 75 | 75 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 |
|---|
| Max (°F) | 86 | 86 | 86 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 86 | 86 |
|---|
The
rainfall is abundant, above 2,000 millimetres (80 inches) per year; the rainiest period is from July to November, the driest is from January to April, in which, however, there is a moderate amount of showers and thunderstorms. Here is the average precipitation.
Tamuning - Average precipitation| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|
| Prec.(mm) | 115 | 90 | 65 | 85 | 125 | 160 | 265 | 365 | 340 | 310 | 215 | 140 | 2275 |
|---|
| Prec.(in) | 4.5 | 3.5 | 2.6 | 3.3 | 4.9 | 6.3 | 10.4 | 14.4 | 13.4 | 12.2 | 8.5 | 5.5 | 89.6 |
|---|
| Days | 19 | 16 | 17 | 17 | 19 | 22 | 25 | 25 | 24 | 25 | 23 | 22 | 254 |
|---|
The amount of
sunshine in Guam is never excellent, though it is acceptable or good from January to June; from July to December, during the wettest period, it is quite scarce.
Tamuning - Sunshine| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|
| Hours | 6 | 7 | 7 | 7 | 7 | 6 | 5 | 5 | 4 | 4 | 4 | 5 |
|---|
For swimming, the sea is warm enough all year round, as can be seen in the following table.
Guam - Sea temperature| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|
| Temp (°C) | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 |
|---|
| Temp (°F) | 82 | 82 | 82 | 82 | 84 | 84 | 84 | 84 | 84 | 84 | 84 | 82 |
|---|
Tropical cyclones
The island lies in the path of
typhoons, the tropical cyclones of Southeast Asia and the Philippine Sea. Typhoons can cause more or less serious damage, bringing heavy rains and strong winds, and normally occur from May to December, though they are more frequent from August to November; sometimes, however, they have passed over the island outside of this period, as happened with Roy (January 1988), Isa (April 1997), and Kong-rey (not strong, April 2007).
When to go
The best time to travel to Guam is from
February to April, being the least rainy of the year, and (normally) outside of the typhoon season.
What to pack
All year round, light clothes, of natural fibres, sun hat, a scarf for the breeze, a light sweatshirt for the evening; light raincoat or umbrella.
For the reef, equipment for snorkeling, water shoes or rubber soled shoes.