Avg High
Phoenix in September
Verdict
In Phoenix, September has a distinct autumn feel. As the season moves along, temperatures are dropping quickly. You can usually expect a hot month that feels reliable day to day. Breezes can be part of the character, especially in exposed spots.
It suits travellers who want straightforward weather for sightseeing and day trips. A breeze can shift the feel of the day, especially later on.
Avg Low
Rain
Daylight
12h
What to expect
- Daytime feel - Intense heat where evenings can feel like a different season. Overall it feels close to what you’d expect.
- Rain pattern - A mix of dry and wet days. Rain is usually intermittent rather than relentless. A light shower is possible, but not a daily feature.
- Sun & UV - High UV at midday. Cloud cover doesn't always mean low UV, so still protect your skin. Shade breaks feel genuinely worthwhile.
- Exposure - Often breezy, and gusts can catch you in exposed spots. A light outer layer helps when you’re in the shade.
September in context
How it compares to the rest of the year in Phoenix.
Hottest (avg)
#4 / 12
Wettest (avg)
#6 / 12
Daylight Hours
#6 / 12
Windiest (avg)
#6 / 12
Highest UV
#6 / 12
Most Humid
#7 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 12.4 hours
- UV index (max)
- 8
- Typical sun hours
- 06:11 – 18:33
Rain & Snow
- Total
-
- Rainy days
- 4
- Cloud cover
- 21%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 33%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is September a good time to visit Phoenix?
Typical September days in Phoenix reach highs of 37°C (99°F) with nights around 24°C (75°F). It usually feels very hot by day and warm after dark. Overall, September sits in the middle of the Phoenix climate range.
What are temperatures like in September?
Daytime temperatures in September typically peak near 37°C (99°F), while nights drop to around 24°C (75°F). Expect very hot afternoons and warm evenings.
How much does it rain in September?
Rainfall in September averages 25 mm (0.98 in) across roughly 4 days. Overall it is a mostly dry time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in September?
You can expect about 12 hours of daylight in September. Sunrise is typically around 06:11 and sunset near 18:33. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in September?
UV levels are often high (around 8). Regular sunscreen and a hat are recommended.
Is it windy in September?
In September, average wind speeds are around 8 km/h (5 mph), with gusts on the windiest days reaching about 42 km/h (26 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.