Weather in グアム in 9月
Country-wide climate normals across 15 cities in グアム.
How Hot Is グアム in 9月?
グアム sees consistently hot September weather — average highs of 29°C, average lows of 26°C, with minimal regional differences. Whether you're in Dededo Village or one of the coastal cities, conditions feel broadly the same: hot, generally clear, with little night-time relief.
Sunshine in グアム in 9月
Limited sunshine and short daylight define グアム's September: Dededo Village averages just 0.7h of direct sun, with the sun up between 6:10 am and 6:20 pm. The grey, overcast pattern is consistent across most of the country, with little regional variation in cloud cover.
Does It Rain In グアム In 9月?
Monsoon-like conditions dominate グアム'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 グアム Humid In 9月?
グアム 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 グアム In 9月
グアム'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 グアム In 9月
Heavy overcast covers グアム 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.