Roseville, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Roseville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——95°59°—
- FridayJun 5Overcast——98°63°+3°
- SaturdayJun 6Overcast——86°62°-12°
- SundayJun 7Overcast——84°57°-2°
- MondayJun 8Rain19%0.67″62°57°-22°
- TuesdayJun 9Drizzle22%0.04″72°58°+10°
- WednesdayJun 10Clear——83°59°+11°
PM2.5 at 7.0 µg/m³ (AQI 39) with a 0.78 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. AQI down 9 over the last 6 hours (steady decline since this morning).
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 33 now. With UV 9.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 40 by mid-afternoon.
- Present
- AQI 33
- UV peak
- 9.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 40
PM × Wind × Precip
PM2.5 at 7.0 µg/m³ (AQI 39) with a 0.78 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.78
- Wind
- light
- 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
- 6:34 AM
- Moonset
- 4:16 PM
- In sign
- ♒︎ Aquarius
Coastal fog thickens at dawn
Roseville at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 9 (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 | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
July brings Roseville's warmest temperatures (~76°F mean) while December delivers the coldest (~46°F). Rain follows the opposite pattern, with January receiving the most precipitation (3.7 inches) and July staying bone dry (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 47° | 3.7″ | 6 |
| February | 50° | 3.5″ | 7 |
| March | 54° | 2.6″ | 6 |
| April | 59° | 1.2″ | 3 |
| May | 66° | 0.6″ | 2 |
| June | 73° | 0.2″ | 1 |
| July | 76° | 0.0″ | 0 |
| August | 75° | 0.1″ | 0 |
| September | 72° | 0.1″ | 0 |
| October | 64° | 0.8″ | 2 |
| November | 53° | 1.8″ | 4 |
| December | 46° | 3.3″ | 7 |
Regional context
Roseville falls within a hot-summer Mediterranean climate region, sharing temperature ranges, seasonal patterns, and growing conditions with surrounding cities in this climate zone.
Similar climates: Los Angeles, CA, San Francisco, CA, San Diego, CA, Riverside, CA, Sacramento, CA.
Naturalist notes
Valley oaks begin their spring leafout in late April, their fresh green canopy emerging as soil temperatures warm consistently above 50°F.
Western bluebirds start their second nesting cycle in May, taking advantage of the abundant insects that emerge during California's late spring warming period.
Frequently asked
- When does it freeze in Roseville?
- The last spring frost in Roseville typically occurs around mid-April, while the first fall frost returns around mid-November.
- What is the rainy season in Roseville?
- January stands as the wettest month, delivering about 3.7 inches of rain on average, contributing to the city's annual total of roughly 18 inches.
- What is the warmest month in Roseville?
- July typically records the warmest temperatures, averaging about 76°F.
- What is the coldest month in Roseville?
- December usually brings the coldest conditions, averaging about 46°F.
- When can I start a vegetable garden in Roseville?
- Cool-season crops like peas and lettuce can be planted around the last spring frost in mid-April, while warm-season crops such as tomatoes and peppers should wait 1–2 weeks after that date.
- How many rainy days does Roseville get?
- Roseville experiences about 36 rainy days per year on average.
- What hardiness zone is Roseville?
- Roseville's USDA hardiness zone depends on its lowest average winter temperature; the USDA's online lookup tool using the city ZIP code will provide the current zone designation.
Climate
Roseville, California experiences a hot-summer Mediterranean climate. January temperatures hover near 47°F while July averages 76°F, creating a 30°F seasonal swing.
The city receives about 18 inches of precipitation annually, distributed across roughly 36 rainy days throughout the year.
Weather patterns here follow the influence of latitude (38.8°N), proximity to large water bodies, and elevation. These factors determine what plants thrive, when frost threatens, and how daily weather unfolds.