Walnut Creek, Arizona Weather
The monsoon settles in. Day 15 of summer. Read this microseason across nine climate regions →
Walnut Creek weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——101°80°—
- MondayJul 6Overcast——102°80°+1°
- TuesdayJul 7Clear——103°79°+1°
- WednesdayJul 8Clear——103°82°0°
- ThursdayJul 9Clear——102°81°-1°
- FridayJul 10Clear——101°77°-1°
- SaturdayJul 11Clear——103°78°+2°
AQI 30 (Good), driven by PM2.5. AQI down 11 over the last 6 hours (gradual decline). PM2.5 at 6.5 µg/m³, PM10 at 16.6 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35 now. With UV 8.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 37 around 1 PM.
- Present
- AQI 35
- UV peak
- 8.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 37
PM × Wind × Precip
PM2.5 at 6.5 µg/m³, PM10 at 16.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.39
- Wind
- calm
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:53 PM
- Moonset
- 10:55 AM
- In sign
- ♓︎ Pisces
The monsoon settles in
Walnut Creek at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: March 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Walnut Creek
- Sun101°80°2%
- Mon102°80°2%
- Tue103°79°0%
- Wed103°82°0%
- Thu102°81°0%
- Fri101°77°0%
- Sat103°78°1%
- Sun102°79°8%
- Mon104°81°15%
- Tue99°69°22%
- Wed94°78°12%
- Thu100°82°19%
- Fri107°86°19%
- Sat111°90°26%
- Sun109°90°24%
- Mon109°90°11%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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.
ZIP codes in Walnut Creek
- 86413