Colusa, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Colusa weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Partly Cloudy——91°60°—
- MondayJul 6Clear——92°58°+1°
- TuesdayJul 7Overcast——100°55°+8°
- WednesdayJul 8Clear——103°56°+3°
- ThursdayJul 9Clear——106°63°+3°
- FridayJul 10Overcast——107°63°+1°
- SaturdayJul 11Overcast——109°66°+2°
AQI 26 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.8 µg/m³ (AQI 43) with a 0.74 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
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 37 now. With UV 8.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 44 around 1 PM.
- Present
- AQI 37
- UV peak
- 8.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 44
PM × Wind × Precip
PM2.5 at 7.8 µg/m³ (AQI 43) with a 0.74 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.74
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 11:28 PM
- Moonset
- 11:26 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Colusa at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: April 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 95932
16-Day Forecast — Colusa
- Sun91°60°0%
- Mon92°58°1%
- Tue100°55°0%
- Wed103°56°0%
- Thu106°63°0%
- Fri107°63°0%
- Sat109°66°0%
- Sun95°71°1%
- Mon105°67°1%
- Tue113°68°3%
- Wed112°67°1%
- Thu113°66°2%
- Fri114°72°0%
- Sat113°70°3%
- Sun110°67°3%
- Mon109°60°3%
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 Colusa
- 95932