Columbia, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Columbia weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast11%—86°64°—
- MondayJul 6Overcast——89°65°+3°
- TuesdayJul 7Clear——92°63°+3°
- WednesdayJul 8Clear——94°65°+2°
- ThursdayJul 9Clear——97°67°+3°
- FridayJul 10Partly Cloudy——101°69°+4°
- SaturdayJul 11Overcast——103°73°+2°
AQI 23 (Good), driven by Ozone. AQI down 7 over the last 6 hours (gradual decline). Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~97%) — afternoon ozone should stay flat.
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 43. Overcast through the UV peak window (cloud cover ~97%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 7.8 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 22
PM × Wind × Precip
PM2.5 at 6.6 µg/m³ (AQI 37), ratio 0.64 with 7 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.64
- 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
- 11:20 PM
- Moonset
- 11:20 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Columbia at a glance
- Today vs. normal: 5°F above the seasonal normal for this latitude
- Last frost: April 4 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 95310
16-Day Forecast — Columbia
- Sun86°64°11%
- Mon89°65°1%
- Tue92°63°0%
- Wed94°65°0%
- Thu97°67°0%
- Fri101°69°0%
- Sat103°73°0%
- Sun90°69°1%
- Mon96°66°5%
- Tue102°71°5%
- Wed103°74°3%
- Thu104°75°3%
- Fri107°77°6%
- Sat104°76°10%
- Sun101°73°11%
- Mon100°71°10%
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 Columbia
- 95310
- 95370