Phoenix, Arizona Weather in September
United States · September climate averages and travel tips
Avg high38°C (100°F)
Avg low24°C (74°F)
Rainfall22 mm (0.9 in)
RatingPoor 4.1/10
Expect very hot days in Phoenix in September: the average high is 38°C (100°F) and the average low is 24°C (74°F). September is autumn (fall) in United States. The month is fairly dry, with about 22 mm (0.9 in) of rain spread over 4 days. The air is dry, with average humidity of just 31%. You get roughly 12.2 hours of daylight and mostly clear skies.
Is September a good time to visit Phoenix?
September is not the best time to visit Phoenix (4.1/10) mainly because of the heat. The weather is much better in November to March.
September weather at a glance
| Average high | 38°C (100°F) |
|---|---|
| Average low | 24°C (74°F) |
| Daily mean | 31°C (87°F) |
| Rainfall | 22 mm (0.9 in) |
| Rainy days (1 mm+) | 4 |
| Humidity | 31% |
| Cloud cover | 26% |
| Daylight | 12.2 hours |
| Est. sunshine | 9.9 hours/day |
| Wind | 6.6 km/h |
| vs August | 2°C cooler than August, with 16 mm less rain. |
What to pack for Phoenix in September
- light, breathable clothing
- sunscreen and a hat
- swimwear
Phoenix weather in other months
Jan20°C / 6°C35 mmExcellentFeb21°C / 7°C30 mmExcellentMar25°C / 9°C23 mmExcellentApr30°C / 13°C5 mmExcellentMay35°C / 18°C6 mmFairJun41°C / 24°C3 mmPoorJul41°C / 28°C36 mmPoorAug40°C / 27°C38 mmPoorSep38°C / 24°C22 mmPoorOct32°C / 17°C14 mmGoodNov26°C / 11°C17 mmExcellentDec20°C / 6°C34 mmExcellent
← AugustBest time to visit PhoenixOctober →
Better weather in September nearby
- San Francisco, California24°C · 4 mm · Excellent
- Seattle, Washington21°C · 62 mm · Excellent
- Denver, Colorado29°C · 35 mm · Excellent
- Calgary20°C · 49 mm · Excellent
- Edmonton19°C · 41 mm · Excellent
- Toronto22°C · 62 mm · Excellent
Nearby in September
- Mexicali40°C · 8 mm
- Las Vegas, Nevada36°C · 10 mm
- Tijuana30°C · 6 mm
- San Diego, California30°C · 6 mm
- Ciudad Juarez32°C · 42 mm
- Los Angeles, California31°C · 4 mm
Where else is good in September? See where to go in September.