Phoenix, Arizona Weather
Heat hardens the dust. Day 76 of spring. Read this microseason across nine climate regions →
Phoenix weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Clear——106°75°—
- ThursdayJun 4Mostly Clear——106°75°0°
- FridayJun 5Clear——105°79°-1°
- SaturdayJun 6Overcast——103°86°-2°
- SundayJun 7Overcast——104°86°+1°
- MondayJun 8Overcast——99°84°-5°
- TuesdayJun 9Clear——103°85°+4°
Ozone at AQI 70 now. AQI flat over the last 6 hours (within ±3 points). With UV 9.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 89 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 70 now. With UV 9.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 89 by mid-afternoon.
- Present
- AQI 70
- UV peak
- 9.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 89
PM × Wind × Precip
PM2.5 at 8.2 µg/m³, PM10 at 39.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.21
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 5:00 AM
- Moonset
- 2:52 PM
- In sign
- ♑︎ Capricorn
Heat hardens the dust
Phoenix at a glance
- Today vs. normal: 22°F above the seasonal normal for this latitude
- Last frost: March 8 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
July brings Phoenix's warmest temperatures (~92°F mean) while December delivers the coldest (~53°F). February sees peak rainfall at 1.2 inches, and June typically receives 0.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 55° | 1.2″ | 2 |
| February | 57° | 1.2″ | 2 |
| March | 63° | 1.1″ | 1 |
| April | 70° | 0.3″ | 1 |
| May | 78° | 0.2″ | 0 |
| June | 87° | 0.0″ | 0 |
| July | 92° | 0.8″ | 2 |
| August | 92° | 1.0″ | 2 |
| September | 86° | 0.7″ | 2 |
| October | 75° | 0.7″ | 2 |
| November | 62° | 0.9″ | 1 |
| December | 53° | 0.8″ | 2 |
Regional context
Phoenix belongs to a hot desert climate region — sharing similar temperature ranges, seasonal patterns, and growing conditions with nearby cities.
Similar climates: Tucson, AZ, Mesa, AZ, Gilbert, AZ, Chandler, AZ, Glendale, AZ.
Naturalist notes
Saguaro cacti begin their spectacular blooming period in late April, producing waxy white flowers that open during cool nighttime hours.
Gambel's quail become increasingly vocal in May as breeding pairs establish territories throughout desert washes and suburban edges.
Frequently asked
- When does it freeze in Phoenix?
- Phoenix's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Phoenix?
- February is the wettest month with about 1.2 inches of rain on average; the city receives roughly 9 inches annually.
- What is the warmest month in Phoenix?
- July is typically warmest, averaging about 92°F.
- What is the coldest month in Phoenix?
- December is typically coldest, averaging about 53°F.
- When can I start a vegetable garden in Phoenix?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Phoenix get?
- Phoenix averages about 18 rainy days per year.
- What hardiness zone is Phoenix?
- Phoenix's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Phoenix, Arizona experiences a hot desert climate. January temperatures hover near 55°F while July averages 92°F — a 38°F seasonal swing.
Throughout the year, Phoenix receives about 9 inches of precipitation spread over roughly 18 rainy days.
Latitude (33.6°N), proximity to large water bodies, and elevation set the rhythm of the year — shaping what grows here, when frost is likely, and the daily weather story.
ZIP codes in Phoenix
- 85009
- 85003
- 85006
- 85007
- 85004
- 85083
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- 85331
- 85033
- 85306
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