30YearWeather
Phoenix in September
Phoenix weather in September - United States
☀️Hot & Sunny

Phoenix Weather in September

Plan your September trip to Phoenix, United States. Based on 30 years of NASA data, expect temperatures of 37°C (high) to 24°C (low), with 8% rain probability and 8 hours of daily sunshine. Great conditions with only 0 rainy days expected.

Avg High
37°C

Hottest around day 1

Avg Low
24°C

Coolest around day 30

Rainy Days
0days

8% avg rain chance

Sunshine
8hrs/day

Autumn season

Phoenix September Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for Phoenix

Smart Flight Estimator

Airport-to-Airport Logistics

unlock smart flight estimates

Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub
91/ 100
Traffic Index

Extremely busy airport

Peak Daily Arrivals

0

slots per day

Peak

May

Low

Nov

Monthly Traffic Distribution

667
Jan
696
Feb
750
Mar
804
Apr
821
May
592
Jun
603
Jul
562
Aug
604
Sep
599
Oct
554
Nov
687
Dec
Traffic Level
Low Season

Key Connections

Denver (DEN)
Los Angeles (LAX)
Seattle Tacoma (SEA)
Salt Lake City (SLC)
San Diego (SAN)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Phoenix?

👌Good option with minor considerations
Short Answer

Clear skies dominate Phoenix in September (8% rain chance), but 37°C highs demand sun protection and hydration. The dry 33% humidity is easier to tolerate than humid heat.

Decision Factors

Extreme heat danger

37.4°C highs, potentially dangerous for outdoor activities

Excellent dry conditions

Only 8% rain probability - ideal for outdoor activities

Plenty of sunshine

11h of sunshine daily

Shoulder season - balanced conditions

74% of peak - good value with moderate crowds

Good For

  • 📸
    Photographers

    11h sunshine, 80% clear skies for golden hour shots

  • 💑
    Honeymoon couples

    Wedding score 83/100 with romantic weather conditions

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👴
    Elderly travelers

    Heat index of 37°C poses health risks

  • 🌡️
    Heat-sensitive visitors

    37°C feels-like temperature creates discomfort

900 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Phoenix in September averages 37°C with 8% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Phoenix in September

What are the temperatures in Phoenix in September?

Daytime highs average 37°C, nights drop to 24°C. There's a significant day/night temperature swing.

How many rainy days in Phoenix in September?

Expect around 0 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Phoenix in September?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is September peak season in Phoenix?

This is shoulder season—moderate prices and manageable crowds.