Weather in A.S in September
Country-wide climate normals across 27 cities in A.S.
How Hot Is A.S in September?
Hot weather dominates A.S: September averages 28°C, with the warmest cities reaching 34°C.
Sunshine in A.S in September
Sun and cloud trade off across A.S in September: New York City averages 4.9h of direct sun a day, with daylight from 6:35 am to 7:05 pm. Conditions vary day to day, with bright spells interrupted by cloudy stretches. Most regions of the country see a similar mixed pattern, though some areas may lean drier or wetter than the national average.
Does It Rain In A.S In September?
Heavy rain shapes A.S's September: New York City averages 101mm across 9 days, and most regions of the country see similar persistent wet conditions. Long sunny stretches are rare. Expect rain on roughly two out of every three days.
Is A.S Humid In September?
A.S's September is humid — 64% on average in New York City, with similar muggy conditions in most regions. Afternoons feel sticky, especially after rain, and the moisture amplifies warm-day temperatures noticeably. Coastal cities see the highest readings.
Wind In A.S In September
A.S's September has gentle wind — New York City averages 18 kph, and the country tracks similarly. Outdoor activity is comfortable, and afternoon thermals add a pleasant breeze in inland areas.
Cloud Cover In A.S In September
A.S sees mostly cloudy weather through September: New York City averages 52% cloud cover, and the pattern repeats across the country. Bright sun is uncommon; expect a grey, soft-lit feel to most days.