Parker, Arizona Weather
Heat hardens the dust. Day 77 of spring. Read this microseason across nine climate regions →
Parker weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Partly Cloudy——104°72°—
- ThursdayJun 4Clear——106°75°+2°
- FridayJun 5Clear——106°74°0°
- SaturdayJun 6Overcast——106°74°0°
- SundayJun 7Overcast——103°73°-3°
- MondayJun 8Clear——103°72°0°
- TuesdayJun 9Clear——106°72°+3°
Ozone at AQI 45 now. AQI up 6 over the last 6 hours (gradual rise). With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 11 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 45 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 11 by mid-afternoon.
- Present
- AQI 45
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 11
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
- 5:50 AM
- Moonset
- 4:00 PM
- In sign
- ♑︎ Capricorn
Heat hardens the dust
Parker at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: March 11 (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
Parker's warmest month is July (~95°F mean) and its coldest is December (~54°F). Rainfall peaks in January (0.8 inches) and bottoms out in June (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 55° | 0.8″ | 2 |
| February | 59° | 0.7″ | 2 |
| March | 65° | 0.6″ | 2 |
| April | 72° | 0.2″ | 0 |
| May | 80° | 0.1″ | 0 |
| June | 90° | 0.0″ | 0 |
| July | 95° | 0.2″ | 1 |
| August | 94° | 0.4″ | 1 |
| September | 88° | 0.4″ | 1 |
| October | 76° | 0.4″ | 1 |
| November | 63° | 0.2″ | 1 |
| December | 54° | 0.5″ | 1 |
Regional context
Parker's baseline climate, derived from NOAA NCEI 1991-2020 normals at the nearest reporting station, swings from a January mean of 55°F to a July mean of 95°F — a 39°F seasonal arc typical of the mid-latitude bands. Annual precipitation runs about 4.6 inches spread across roughly 11 days with measurable rain or snow each year.
Precipitation peaks in the cool season: January averages 0.8 inches across 1.8 days with measurable rain, mostly from frontal systems and winter storms, while June bottoms out at 0.0 inches across just 0.0 rainy days during the drier warm-season stretch. The pattern groups Parker with places like Bluewater, AZ, Poston, AZ and Cienega Springs, AZ, places whose summer-dry rhythm and cool-season-wet recharge run on the same regional storm-track exposure.
Hard freezes are uncommon here: the coldest month averages 54°F, well above the freezing threshold, so the growing window stretches across most of the year. Cool-season crops can be planted in late fall through early spring, and warm-season transplants tolerate the local winter unless an unusual frontal passage drops temperatures below the 30-year normal. The hottest stretch arrives in July at a mean of 95°F, which limits cool-season vegetables to the shoulder months on either side of the summer peak. Those are 1991-2020 normals; in a given year an unusual frontal passage can drop temperatures briefly below the seasonal mean. Within Parker, neighborhood-scale variation — coastal proximity, elevation, tree cover, urban heat-island intensity — drives a 4-7°F spread in overnight lows that the regional average masks.
Similar climates: Bluewater, AZ, Poston, AZ, Cienega Springs, AZ, Bouse, AZ, Parker Strip, AZ.
Frequently asked
- When does it freeze in Parker?
- Parker's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Parker?
- January is the wettest month with about 0.8 inches of rain on average; the city receives roughly 5 inches annually.
- What is the warmest month in Parker?
- July is typically warmest, averaging about 95°F.
- What is the coldest month in Parker?
- December is typically coldest, averaging about 54°F.
- When can I start a vegetable garden in Parker?
- 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 Parker get?
- Parker averages about 11 rainy days per year.
- What hardiness zone is Parker?
- Parker'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
Parker, Arizona sits in a hot desert climate zone. January means hover near 55°F while July averages 95°F — a 39°F seasonal swing.
Across the year, Parker receives about 5 inches of precipitation spread over roughly 11 rainy days.
The rhythm of the year is set by latitude (34.0°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.