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 millimeters (80 inches) per year; the rainiest period is from July to November, and the driest one is from January to April, when, however, there is still 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 not 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 |
|---|
Guam's sea is warm enough to swim in 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 affected the island outside of this period, as happened with typhoon Roy (January 1988), Isa (April 1997), and Kong-rey (not strong, April 2007).
Best Time
The best time to travel to Guam is from
February to April because it's the least rainy of the year, and (normally) outside of the typhoon season.
What to pack
All year round, bring light clothes of natural fibers, a sun hat, a scarf for the breeze, a light sweatshirt for the evening; a light raincoat or umbrella.
When going to the reef, you can bring snorkeling equipment, including water shoes or rubber-soled shoes.