Phoenix Weather in August
United States · Hot Desert climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Phoenix sees average temperatures ranging from a low of 28.3°C (82.9°F) to a high of 40.2°C (104.4°F), with a mean of 34.4°C (93.9°F). Compared to the annual average of 23.8°C (74.8°F), this month is 10.6°C warmer than the yearly norm. Precipitation averages 45.2mm, making it approximately 21.0mm wetter than the monthly average of 24.0mm. The city receives an average of 12.0 hours of sunshine per day during August, with relative humidity averaging 36.2%. Wind speeds reach an average maximum of 20.0 km/h. For travelers, this month offers a temperature experience in Phoenix, with wetter-than-average conditions compared to the rest of the year.
Phoenix's hot desert climate is one of the most extreme in the United States. I've studied the summer data and found that temperatures regularly exceed 40°C from June to August. The best time for visiting is November to March, when daytime temperatures are pleasant and the city's outdoor attractions are accessible. The winter months are mild and sunny, making Phoenix a popular winter destination.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 36.0°C (96.8°F) | 34.4°C (93.9°F) | 31.8°C (89.2°F) |
| Rainfall | 71.5mm | 45.2mm | 18.3mm |
| Sunshine | 12.1 hrs | 12.0 hrs | 11.4 hrs |
| Humidity | 29.9% | 36.2% | 30.4% |
| Wind | 21.8 km/h | 20.0 km/h | 19.0 km/h |
| Rainy Days | 6.6 | 7.4 | 3.6 |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Phoenix in August, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Phoenix in August?
The average temperature in Phoenix during August ranges from 28.3°C (82.9°F) to 40.2°C (104.4°F), with a mean of 34.4°C (93.9°F).
How much does it rain in Phoenix in August?
Phoenix receives an average of 45.2mm of precipitation in August, spread across approximately 7.4 rainy days.
What should I pack for Phoenix in August?
Based on August weather data, pack lightweight, breathable clothing, sunscreen, and a hat.
Is August a good time to visit Phoenix?
August is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Phoenix
Cities with Similar August Climate (Hot Desert)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 33.45°, -112.07°. Timezone: America/Phoenix. Last updated: 2026-07-30.