Moreno Valley, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Moreno Valley weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Foggy——90°54°—
- ThursdayJun 4Clear——94°56°+4°
- FridayJun 5Clear——94°57°0°
- SaturdayJun 6Overcast——89°58°-5°
- SundayJun 7Clear——86°55°-3°
- MondayJun 8Clear——89°54°+3°
- TuesdayJun 9Clear——88°56°-1°
PM2.5 at 18.9 µg/m³ (AQI 69) with a 0.71 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust. AQI up 22 in the last 6 hours — air quality is degrading.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 AM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 51 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 12 by mid-afternoon.
- Present
- AQI 51
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 18.9 µg/m³ (AQI 69) with a 0.71 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.71
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:02 AM
- Moonset
- 4:12 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Moreno Valley at a glance
- Today vs. normal: 13°F below the seasonal normal for this latitude
- Last frost: March 11 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, 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.
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 brings Moreno Valley's warmest temperatures (~80°F mean) while December delivers the coldest (~53°F). February sees peak rainfall at 3.0 inches, contrasting sharply with August's minimal 0.1 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 54° | 2.8″ | 5 |
| February | 55° | 3.0″ | 5 |
| March | 58° | 2.0″ | 4 |
| April | 62° | 0.9″ | 2 |
| May | 66° | 0.3″ | 1 |
| June | 72° | 0.1″ | 0 |
| July | 79° | 0.1″ | 1 |
| August | 80° | 0.1″ | 0 |
| September | 76° | 0.1″ | 0 |
| October | 68° | 0.5″ | 1 |
| November | 60° | 0.9″ | 2 |
| December | 53° | 2.0″ | 4 |
Regional context
Moreno Valley belongs to a hot-summer Mediterranean climate region that encompasses nearby cities with similar temperature ranges, seasonal patterns, and growing conditions.
Similar climates: Los Angeles, CA, San Francisco, CA, San Diego, CA, Riverside, CA, Sacramento, CA.
Naturalist notes
California poppies begin their peak bloom in late April, painting hillsides orange across the region.
Anna's hummingbirds start their primary nesting season in March, with males performing elaborate dive displays.
Frequently asked
- When does it freeze in Moreno Valley?
- Mid-March typically marks Moreno Valley's last spring frost, while the first fall frost usually arrives around mid-December.
- What is the rainy season in Moreno Valley?
- February stands as the wettest month with about 3.0 inches of rain on average; annual precipitation totals roughly 13 inches.
- What is the warmest month in Moreno Valley?
- August typically registers as the warmest month, averaging about 80°F.
- What is the coldest month in Moreno Valley?
- December usually brings the coldest temperatures, averaging about 53°F.
- When can I start a vegetable garden in Moreno Valley?
- Plant cool-season crops like peas and lettuce around the last spring frost in mid-March; warm-season crops such as tomatoes and peppers should wait 1–2 weeks after.
- How many rainy days does Moreno Valley get?
- Moreno Valley experiences about 24 rainy days per year on average.
- What hardiness zone is Moreno Valley?
- Check the USDA's online lookup using the city ZIP code to find Moreno Valley's current hardiness zone designation, which reflects the lowest average winter temperature.
Climate
Moreno Valley, California experiences a hot-summer Mediterranean climate zone. January temperatures hover near 54°F while July averages 79°F — a 25°F seasonal swing.
Throughout the year, Moreno Valley receives about 13 inches of precipitation spread over roughly 24 rainy days.
Location determines the weather patterns here: latitude (33.9°N), proximity to large water bodies, and elevation all influence what grows, when frost threatens, and the daily weather conditions.