Lewiston, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Lewiston weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——94°61°—
- MondayJul 6Partly Cloudy——92°64°-2°
- TuesdayJul 7Clear——93°55°+1°
- WednesdayJul 8Clear——97°51°+4°
- ThursdayJul 9Clear——99°52°+2°
- FridayJul 10Overcast——100°55°+1°
- SaturdayJul 11Overcast——103°55°+3°
AQI 43 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±4 points). Ozone at AQI 49. Overcast through the UV peak window (cloud cover ~88%) — 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 49. Overcast through the UV peak window (cloud cover ~88%) — afternoon ozone should stay flat.
- Present
- AQI 49
- UV peak
- 6.1 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 20
PM × Wind × Precip
PM2.5 at 6.2 µg/m³ (AQI 34) with a 0.65 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.65
- Wind
- calm
- 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
- 11:32 PM
- Moonset
- 11:29 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Lewiston at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: April 20 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 96052
16-Day Forecast — Lewiston
- Sun94°61°1%
- Mon92°64°2%
- Tue93°55°0%
- Wed97°51°0%
- Thu99°52°0%
- Fri100°55°0%
- Sat103°55°0%
- Sun91°62°0%
- Mon97°60°2%
- Tue100°55°3%
- Wed102°52°2%
- Thu104°54°2%
- Fri106°56°3%
- Sat104°59°6%
- Sun102°58°0%
- Mon102°52°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 Lewiston
- 96052