Arroyo Grande, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Arroyo Grande weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——66°57°—
- MondayJul 6Overcast——66°56°0°
- TuesdayJul 7Overcast——66°54°0°
- WednesdayJul 8Mostly Clear——70°56°+4°
- ThursdayJul 9Partly Cloudy——71°57°+1°
- FridayJul 10Partly Cloudy——68°56°-3°
- SaturdayJul 11Overcast——68°56°0°
AQI 38 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 10.4 µg/m³ (AQI 53), ratio 0.67 with 9 mph wind — characteristic of long-range haze transport rather than a local source.
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 36 now. With UV 8.5 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 29 around 1 PM.
- Present
- AQI 36
- UV peak
- 8.5 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 29
PM × Wind × Precip
PM2.5 at 10.4 µg/m³ (AQI 53), ratio 0.67 with 9 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.67
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 11:19 PM
- Moonset
- 11:21 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Arroyo Grande at a glance
- Today vs. normal: 14°F below 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.
ZIP code: 93420
16-Day Forecast — Arroyo Grande
- Sun66°57°6%
- Mon66°56°0%
- Tue66°54°0%
- Wed70°56°0%
- Thu71°57°0%
- Fri68°56°0%
- Sat68°56°1%
- Sun70°61°1%
- Mon72°58°6%
- Tue66°60°2%
- Wed74°63°1%
- Thu76°64°3%
- Fri93°65°3%
- Sat87°67°10%
- Sun71°63°6%
- Mon71°58°6%
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 Arroyo Grande
- 93420
- 93421