Grand Canyon Weather in September
September in Grand Canyon typically sees daytime highs of 27°C (81°F) and nighttime lows of 11°C (52°F). Expect some rainfall during the month.
Rainfall in Grand Canyon in September
You can typically expect 6 days of rain this month, averaging around 34 mm (1.3 in). When rain does fall, showers tend to be light and brief. Most days will be dry.
Temperature in Grand Canyon in September
September is a perfect month in Grand Canyon, with 27°C (81°F) during the day and 11°C (52°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Grand Canyon's climate page.
Grand Canyon Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
27°C (81°F)
Chance of Rain
21%
Precipitation
34 mm (1.3 in)
Rainy days
6 days
Daily Historical Temperatures
44-year average (1976-2025)
Based on our historical records, temperatures in Grand Canyon typically drop from around 26°C (79°F) at the start of September to approximately 23°C (73°F) by the end. Nights are cold, with lows typically ranging from 3°C (37°F) to 10°C (50°F).
Average temperatures in September
Historical weather for Grand Canyon in September
Browse day-by-day weather records for Grand Canyon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Grand Canyon historical weather extremes in September
Based on weather observations in Grand Canyon between 1997 and 2025, these are the recorded extremes during September.
- On September 5, 2020, temperatures climbed to 34°C (93°F), marking the warmest September day on record.
- The coldest September day was on September 9, 2020, with a maximum of 13°C (55°F).
- Grand Canyon registered its coldest September night on September 25, 2017, with temperatures dropping to -6°C (21°F).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Grand Canyon in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Some rain is possible, so pack something to handle light showers.What To Do in Grand Canyon in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Grand Canyon's climate page.
See the full Grand Canyon climate overview or explore weather in the United States of America.
