Mission Viejo, California Weather
August begins in scorching stillness. Day 43 of summer. Read this microseason across nine climate regions →
Mission Viejo weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Foggy——91°69°—
- MondayAug 3Foggy——88°65°-3°
- TuesdayAug 4Overcast——85°66°-3°
- WednesdayAug 5Mostly Clear——87°68°+2°
- ThursdayAug 6Clear——85°68°-2°
- FridayAug 7Clear——83°67°-2°
- SaturdayAug 8Clear——85°68°+2°
AQI 51 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.8 µg/m³ (AQI 49) with a 0.70 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.
What's driving it
PM × Wind × Precip
PM2.5 at 8.8 µg/m³ (AQI 49) with a 0.70 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.70
- 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).
Red sky at night, sailor's delight.
- Moonrise
- 9:35 PM
- Moonset
- 10:00 AM
- In sign
- ♓︎ Pisces
August begins in scorching stillness
Mission Viejo at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: March 9 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
ZIP codes: 92691, 92692
16-Day Forecast — Mission Viejo
- Sun91°69°0%
- Mon88°65°0%
- Tue85°66°0%
- Wed87°68°0%
- Thu85°68°1%
- Fri83°67°1%
- Sat85°68°0%
- Sun85°67°1%
- Mon82°67°2%
- Tue82°66°1%
- Wed81°66°1%
- Thu82°66°3%
- Fri85°68°16%
- Sat84°68°4%
- Sun84°67°6%
- Mon82°66°6%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Mission Viejo
Right now in the garden
Peak growing season
As of August 2, 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.
Sun & seasons in Mission Viejo
Mission Viejo sits in Orange County, where the year’s longest day runs 14h 23m of daylight and its shortest just 9h 55m — a swing of +4h 28m 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 55 miles to the NW. The nearest town Mission Viejo tracks is Irvine, roughly 8 miles to the NW.
Air quality in Mission Viejo’s county has held roughly steady since 2020; its cleanest year on record was 2023 (median AQI 52). See the full air-quality history for Mission Viejo.
Microseason · August 1–5
August begins in scorching stillness
Calm days dominate early August; temperatures peak; the entire ecosystem is in survival mode.
Day 214 of 365 · Wedge 43 of 72
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
August is Mission Viejo's warmest stretch (~71°F) and December its coldest (~56°F); precipitation crests in February at 3.4 inches and ebbs in August to 0.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 56° | 2.8″ | 5 |
| February | 56° | 3.4″ | 5 |
| March | 59° | 1.6″ | 3 |
| April | 61° | 0.8″ | 2 |
| May | 65° | 0.2″ | 1 |
| June | 67° | 0.1″ | 1 |
| July | 70° | 0.1″ | 0 |
| August | 71° | 0.0″ | 0 |
| September | 70° | 0.2″ | 0 |
| October | 66° | 0.5″ | 1 |
| November | 60° | 1.1″ | 1 |
| December | 56° | 1.9″ | 3 |
Regional context
By the nearest station's NOAA NCEI 1991-2020 normals, Mission Viejo sees 56°F Januarys and 70°F Julys, a 14°F range, plus around 12.7 inches of precipitation across 23 days.
Cool-season fronts carry Mission Viejo's rain: February logs 3.4 inches on 5.3 days, against August's 0.0 inches on 0.0 — winter does the heavy lifting in Mission Viejo. That groups Mission Viejo with places like Las Flores, CA, Laguna Hills, CA and Rancho Santa Margarita, CA on the same cool-season storm track.
Freezes are uncommon in Mission Viejo, where the coldest month averages 56°F; cool-season crops grow fall through spring. Summer heat in August (about 71°F) is the binding constraint, not cold. Mission Viejo's coastal lots stay 4-7°F milder overnight than Mission Viejo's inland parcels.
Similar climates: Las Flores, CA, Laguna Hills, CA, Rancho Santa Margarita, CA, Lake Forest, CA, Coto de Caza, CA.
Naturalist notes
California poppies typically begin their peak bloom in late April, painting hillsides orange across Mission Viejo's Mediterranean landscape.
Allen's hummingbirds start their northward migration through the area in late February, often arriving just as the first wildflowers open.
Frequently asked
- When does it freeze in Mission Viejo?
- Mission Viejo's last spring frost lands near mid-March, and in Mission Viejo the first fall frost follows around mid-December.
- What is the rainy season in Mission Viejo?
- Rainfall in Mission Viejo peaks in February near 3.4 inches, out of about 13 inches annually.
- What is the warmest month in Mission Viejo?
- On average August tops the year in Mission Viejo at about 71°F.
- What is the coldest month in Mission Viejo?
- The coldest stretch in Mission Viejo falls in December, around 56°F on average.
- When can I start a vegetable garden in Mission Viejo?
- In Mission Viejo, sow peas and hardy greens around mid-March; Mission Viejo's tomatoes and peppers wait two weeks more.
- How many rainy days does Mission Viejo get?
- Mission Viejo averages about 23 days with measurable rain or snow each year.
- What hardiness zone is Mission Viejo?
- With December around 56°F, Mission Viejo's zone reflects that minimum — the USDA ZIP map confirms Mission Viejo's band.
- What is the 10-day forecast for Mission Viejo?
- Mission Viejo'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 Mission Viejo?
- See this week's day-by-day rain chances for Mission Viejo in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Mission Viejo?
- Current conditions for Mission Viejo and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Mission Viejo forecast updated?
- The Mission Viejo forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Mission Viejo?
- Today's sunrise and sunset times for Mission Viejo 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 Mission Viejo?
- The next few days in Mission Viejo's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
The hot-summer Mediterranean climate of Mission Viejo, California carries typical Januarys near 56°F and Julys around 70°F — 14°F of seasonal travel.
Rain and snow bring Mission Viejo roughly 13 inches a year across approximately 23 measurable-precipitation days.
From 33.6°N, Mission Viejo sees a 14°F seasonal swing that governs Mission Viejo's planting and frost windows.
ZIP codes in Mission Viejo
- 92692
- 92691
- 92690