Weather in 괌 in 9월
Country-wide climate normals across 15 cities in 괌.
How Hot Is 괌 in 9월?
Uniform heat across 괌's September: averages climb to 29°C nationally with overnight lows of 26°C, narrow spread from coast to interior. The hottest cities like Apra Harbor register similar readings to the coolest, so plan for consistently hot weather across the country.
Sunshine in 괌 in 9월
Dark, overcast days dominate 괌 in September — Dededo Village sees just 0.7h of sun a day, and the pattern is similar across most regions. Cloud cover is heavy and persistent, with even the brighter regions struggling to escape the gloom for long.
Does It Rain In 괌 In 9월?
Monsoon-like conditions dominate 괌's September: Dededo Village sees 522mm of rain across 29 days, similar nationwide. Heavy showers fall almost daily, often in dramatic afternoon downpours. Sunshine is brief between storms, and humidity stays high throughout the month.
Is 괌 Humid In 9월?
괌 is enveloped in tropical-thick humidity through September: Dededo Village averages 77%, and most of the country tracks similarly. The constant moisture makes warm temperatures feel substantially hotter, and even nights bring limited cooling. Light cotton clothing is essential.
Wind In 괌 In 9월
괌's September has gentle wind — Dededo Village averages 20 kph, and the country tracks similarly. Outdoor activity is comfortable, and afternoon thermals add a pleasant breeze in inland areas.
Cloud Cover In 괌 In 9월
Heavy overcast covers 괌 in September: 79% cloud cover in Dededo Village, with similar grey conditions in most regions. Direct sun is rare, and the pattern is persistent across the country. Coastal and northern regions feel especially heavy.