Glendale, Arizona Weather
Heat hardens the dust. Day 77 of spring. Read this microseason across nine climate regions →
Glendale weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——107°79°—
- FridayJun 5Clear——106°75°-1°
- SaturdayJun 6Overcast——103°77°-3°
- SundayJun 7Overcast——102°84°-1°
- MondayJun 8Clear——102°82°0°
- TuesdayJun 9Clear——105°84°+3°
- WednesdayJun 10Overcast——94°85°-11°
PM2.5 at 6.7 µg/m³, PM10 at 25.5 µg/m³ — typical background levels with no transport signature. AQI projected to hold near 57 over the next 6 hours.
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 35 now. With UV 9.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 42 by mid-afternoon.
- Present
- AQI 35
- UV peak
- 9.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 42
PM × Wind × Precip
PM2.5 at 6.7 µg/m³, PM10 at 25.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.26
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:41 AM
- Moonset
- 3:53 PM
- In sign
- ♒︎ Aquarius
Heat hardens the dust
Glendale at a glance
- Today vs. normal: 14°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 4, 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 Glendale's warmest temperatures (~92°F mean) while December delivers the coldest (~52°F). Rainfall peaks in February (1.3 inches) and drops to nothing in June (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 53° | 1.0″ | 2 |
| February | 56° | 1.3″ | 3 |
| March | 63° | 1.0″ | 2 |
| April | 70° | 0.3″ | 1 |
| May | 78° | 0.1″ | 0 |
| June | 87° | 0.0″ | 0 |
| July | 92° | 0.8″ | 2 |
| August | 91° | 1.0″ | 2 |
| September | 85° | 0.7″ | 1 |
| October | 73° | 0.6″ | 1 |
| November | 61° | 0.6″ | 1 |
| December | 52° | 0.9″ | 2 |
Regional context
Glendale belongs to a hot desert climate region — sharing similar temperature ranges, seasonal patterns, and growing conditions with nearby cities.
Similar climates: Phoenix, AZ, Tucson, AZ, Mesa, AZ, Gilbert, AZ, Chandler, AZ.
Naturalist notes
Desert lupines begin their purple bloom across Glendale's open spaces in late March, marking the transition from cool to warm season.
Anna's hummingbirds start their courtship displays in February, their metallic calls echoing through residential yards as daylight hours lengthen.
Frequently asked
- When does it freeze in Glendale?
- Glendale's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Glendale?
- February is the wettest month with about 1.3 inches of rain on average; the city receives roughly 8 inches annually.
- What is the warmest month in Glendale?
- July is typically warmest, averaging about 92°F.
- What is the coldest month in Glendale?
- December is typically coldest, averaging about 52°F.
- When can I start a vegetable garden in Glendale?
- 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 Glendale get?
- Glendale averages about 18 rainy days per year.
- What hardiness zone is Glendale?
- Glendale'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
Glendale, Arizona sits in a hot desert climate zone. January temperatures hover near 53°F while July averages 92°F — a 39°F seasonal swing.
Throughout the year, Glendale receives about 8 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 what the daily weather story looks like.