Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
September verdict
Very good for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 10h per day, so bright days are a strong part of the month. Rainfall averages 24mm, which is relatively low for holiday planning.
Monthly averages
Temp
28°C
Rain
24mm
Sun
10h
Weather score
78
Very good
Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Drier
Rainfall averages 24mm, which is relatively low for holiday planning.
Bright
Sunshine averages 10h per day, so bright days are a strong part of the month.
Map
Compare Grand Canyon, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
September28°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
September24mm average rain
September is close to Grand Canyon's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
September10 hours average sun
September sits close to Grand Canyon's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to June
This stretch has the strongest sunshine in the monthly averages.
September78 weather score
September scores above Grand Canyon's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
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