Corona, California Weather
Ceanothus blooms again. Day 93 of summer. Read this microseason across nine climate regions →
Corona weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 7:24 AM PDT · Open-Meteo
- TodaySep 21Clear later——82°64°—
- TuesdaySep 22Overcast——83°64°+1°
- WednesdaySep 23Clear——93°61°+10°
- ThursdaySep 24Clear——92°73°-1°
- FridaySep 25Overcast——93°74°+1°
- SaturdaySep 26Overcast——95°77°+2°
- SundaySep 27Overcast——91°76°-4°
Air quality now AQI 61 · Moderate
AQI 61 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 25.3 µg/m³ (AQI 81) with a 0.86 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 25.3 µg/m³ (AQI 81) with a 0.86 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.86
- 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).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:09 PM
- Moonset
- 1:34 AM
- In sign
- ♑︎ Capricorn
Ceanothus blooms again
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Corona at a glance
- Today vs. normal: Today averages 73°F (high 82°F, low 64°F), about the 73°F normal for Sep 21
- Last frost: January 17 (1991–2020 median, NOAA station 14 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant tomatoes, peppers, beans, squash; harvest tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Corona
- Mon82°64°2%
- Tue83°64°1%
- Wed93°61°0%
- Thu92°73°1%
- Fri93°74°2%
- Sat95°77°1%
- Sun91°76°3%
- Mon95°74°5%
- Tue98°79°5%
- Wed102°82°7%
- Thu104°86°5%
- Fri104°88°11%
- Sat102°86°13%
- Sun100°86°12%
- Mon100°85°10%
- Tue95°81°6%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Corona
Interactive wind and temperature map centered on Corona — it loads in your browser. Open the full weather map.
Right now in the garden
Peak growing season
As of September 21, the growing season is at its peak — the first frost (around December 19) is weeks away. Fall transplants go in about 10–12 weeks before the first frost, September 26 to October 10 here. This city's planting calendar for September: plant tomatoes, peppers, beans, and squash; harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Corona
Corona sits in Riverside County, where the year’s longest day runs 14h 24m of daylight and its shortest just 9h 54m — a swing of +4h 31m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Los Angeles, the state’s largest city, lies about 51 miles to the WNW. The nearest town Corona tracks is Riverside, roughly 11 miles to the ENE.
Air quality in Corona
Air quality in Corona’s county has trended cleaner since 2020; its cleanest year on record was 2022 (median AQI 77). See the full air-quality history for Corona.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | radishes, fall brassicas, carrots |
| February | — | lettuce, peas, spinach, radishes |
| March | — | lettuce, peas, spinach, radishes |
| April | tomatoes, peppers, beans, squash | lettuce, peas |
| May | tomatoes, peppers, beans, squash | garlic |
| June | beans, squash | beans, summer squash |
| July | beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| August | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| September | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| October | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| November | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
A year in weather
August is Corona's warmest stretch (~78°F) and January its coldest (~51°F); precipitation crests in February at 3.3 inches and ebbs in August to 0.0 inches.
| Month | Mean temp | Precip |
|---|---|---|
| January | 51° | 3.2″ |
| February | 52° | 3.3″ |
| March | 55° | 2.9″ |
| April | 60° | 1.4″ |
| May | 65° | 0.5″ |
| June | 71° | 0.1″ |
| July | 77° | 0.1″ |
| August | 78° | 0.0″ |
| September | 75° | 0.1″ |
| October | 67° | 0.5″ |
| November | 57° | 1.5″ |
| December | 51° | 2.5″ |
Regional context
Similar climates Coronita, CA, Home Gardens, CA, Norco, CA
In Corona, modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo) put January near 51°F and July near 77°F — a 27°F seasonal arc — with about 16.3 inches of precipitation.
Precipitation in Corona peaks in the cool season: February averages 3.3 inches, while August bottoms out at 0.0 inches. It is a winter-storm rhythm Corona shares with places like Coronita, CA, Home Gardens, CA and Norco, CA.
Once Corona passes January 17, freezes fade and Corona's beds take lettuce, chard, arugula, and mustard greens. Heat-demanding starts go out a fortnight on in Corona, after the soil warms and cold snaps clear. By December 19, frost is back in Corona — protect or harvest anything tender. Open lawns in Corona whiten first when frost returns.
Similar climates: Coronita, CA, Home Gardens, CA, Norco, CA, El Sobrante, CA, Eastvale, CA.
Frequently asked
- When does it freeze in Corona?
- In Corona, expect the last spring frost near January 17; Corona's first autumn frost comes around December 19.
- What is the rainy season in Corona?
- Corona sees its heaviest rain in February (around 3.3 inches), part of roughly 16 inches a year.
- What is the warmest month in Corona?
- August is Corona's warmest month, averaging about 78°F.
- What is the coldest month in Corona?
- Corona bottoms out in January, with a mean near 51°F.
- When can I start a vegetable garden in Corona?
- Corona's last frost (January 17) cues hardy greens; in Corona, hold heat-lovers two weeks past.
- What hardiness zone is Corona?
- Corona sits in the USDA zone set by January lows near 51°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for Corona?
- Corona's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Corona?
- See this week's day-by-day rain chances for Corona in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Corona?
- Current conditions for Corona and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Corona forecast updated?
- The Corona forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Corona?
- Today's sunrise and sunset times for Corona are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Corona?
- The next few days in Corona's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Corona sits at 33.9°N; its climate zone is hot-summer Mediterranean (Köppen approximation).
ZIP codes in Corona
- 92877
- 92878
- 92879
- 92880
- 92881
- 92882
- 92883