Phoenix month by month
Plan your visit to Phoenix by month. Compare weather, crowds, events, and prices across all twelve months with historical climate data.
Phoenix's measured year splits into three bands. November through March holds highs between 18°C and 24°C, with 2 to 4 rain days per month. April and October form a warm bridge at 30°C and 32°C, both nearly dry. May through September pushes highs from 35°C to a July peak of 42°C, and monsoon moisture loads July and August with 5 rain days each.
The 12 published month guides beneath this index track those shifts closely. If your trip falls between November and March, open the month nearest your dates. January at 18°C and March at 24°C feel like different cities. Summer visitors should compare June, 40°C with 1 rain day, against July, 42°C with 5 rain days. Between July and September, monsoon moisture reshapes what Phoenix feels like at street level.
July needs the closest read. It records the year's peak temperature at 42°C with 5 rain days.
July at 42°C with 5 rain days concentrates Phoenix's peak heat and peak monsoon moisture into a single month.
- January
- High
- 18°C
- Low
- 5°C
- Rain
- 32 mm
January is the reason Phoenix works as a winter destination. While cities like Chicago and Minneapolis sit below freezing, the Valley of the Sun delivers daytime highs around 18°C…
- February
- High
- 21°C
- Low
- 8°C
- Rain
- 18 mm
February in Phoenix is snowbird season at full tilt. While Minneapolis sits under 30 cm of snow and Chicago fights single-digit wind chills, Phoenix averages 21°C (70°F) under…
- March
- High
- 24°C
- Low
- 10°C
- Rain
- 36 mm
March is Phoenix's victory lap. The Sonoran Desert sits at a near-perfect 24°C (74°F) during the day, lows dip to a comfortable 10°C (49°F) at night, and the humidity hovers around…
- April
- High
- 30°C
- Low
- 15°C
- Rain
- 2 mm
April is likely the last comfortable month to visit Phoenix before the Sonoran Desert heat takes over. Daytime temperatures average around 30°C (87°F), which feels warm but…
- May
- High
- 35°C
- Low
- 20°C
- Rain
- 2 mm
May in Phoenix is when the desert reminds you it's a desert. Average highs reach 34.8°C (95°F) with lows around 20.1°C (68°F), and the thermometer will likely hit 38°C (100°F) at…
- June
- High
- 41°C
- Low
- 26°C
- Rain
- 7 mm
June in Phoenix is brutal. There is no gentler way to put it. The average high reaches 40.5°C (105°F), and on the worst days temperatures push past 46°C (115°F). The sun feels…
- July
- High
- 42°C
- Low
- 29°C
- Rain
- 74 mm
July in Phoenix is dangerously hot. There's no gentle way to put it. The average high sits at 41.4°C (107°F), and temperatures above 46°C (115°F) are not unusual. The pavement on…
- August
- High
- 40°C
- Low
- 28°C
- Rain
- 51 mm
August in Phoenix is dangerously hot. That is the single most important thing to know. Daytime highs average 40.1°C (104°F), and the city regularly hits 43°C (110°F) or higher…
- September
- High
- 38°C
- Low
- 25°C
- Rain
- 38 mm
September in Phoenix still averages 37.8°C (100°F) in the afternoon. That single fact should drive your entire decision. The city is technically cooling from its July peak of 41°C…
- October
- High
- 32°C
- Low
- 18°C
- Rain
- 35 mm
October is the month Phoenix exhales. After 4 to 5 months of punishing heat that keeps daytime highs above 38°C (100°F), the average high drops to around 32°C (89°F) and evenings…
- November
- High
- 25°C
- Low
- 11°C
- Rain
- 19 mm
November is when Phoenix finally exhales. After five months of temperatures that regularly topped 38°C (100°F), the city drops to a comfortable average high of 24.5°C (76°F) and an…
- December
- High
- 20°C
- Low
- 8°C
- Rain
- 36 mm
December in Phoenix feels like a different city from the one that hits 41°C (106°F) in July. Daytime temperatures settle around 20°C (68°F) with crisp, dry nights dropping to about…