To summarize Guam climate it is essentially tropical marine; generally warm and humid, moderated by northeast trade winds, dry season extends from January to June, rainy season begins from July and continues through December and there is only a little temperature variation from one season to another. With pleasant year round weather in Guam, it is peak tourism season all 12 months of the year in Guam.
Guam has only two seasons, the dry and the rainy. The dry season, locally known as "fanumnangan," begins in December through June. At other time of the year it is rainy season, locally known as "fanuchanan,"
Average annual temperature of Guam: 81 degrees, generally, the range is from the low 70s to the middle 80s.
|Average in Fahrenheit||76||77||78||79||79||80||80||80||79||80||80||79|
|Average in Centigrade||24||25||26||26||26||27||27||27||26||27||27||26|
|Rainfall in inches||5.16||4.26||2.97||4.03||4.49||5.19||9.59||12.16||14.08||14.40||8.51||5.85|
|Relative humidity %||77||76||75||74||73||76||76||81||81||80||80||78|
|Daily Sunshine Hours||11.15||11.30||11.51||12.16||12.40||12.58||13.00||12.47||12.24||12.00||11.35||11.18|