Roseville, California Weather
Ceanothus blooms again. Day 93 of summer. Read this microseason across nine climate regions →
Roseville weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 1:00 AM PDT · Open-Meteo
- TodaySep 21Clear later——84°56°—
- TuesdaySep 22Clear——85°55°+1°
- WednesdaySep 23Overcast——93°67°+8°
- ThursdaySep 24Overcast——93°70°0°
- FridaySep 25Overcast——87°65°-6°
- SaturdaySep 26Overcast——88°68°+1°
- SundaySep 27Overcast——87°65°-1°
Air quality now AQI 54 · Moderate
AQI 54 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.7 µg/m³ (AQI 56) with a 0.79 fine-to-coarse ratio and 6 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 11.7 µg/m³ (AQI 56) with a 0.79 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.79
- 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).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:38 PM
- Moonset
- 1:36 AM
- In sign
- ♑︎ Capricorn
Ceanothus blooms again
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Roseville at a glance
- Today vs. normal: Today averages 70°F (high 84°F, low 56°F), about the 70°F normal for Sep 21
- Last frost: February 22 (1991–2020 median, NOAA station 25 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant beans, squash, fall brassicas, carrots; harvest tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Roseville
- Mon84°56°2%
- Tue85°55°1%
- Wed93°67°0%
- Thu93°70°0%
- Fri87°65°1%
- Sat88°68°0%
- Sun87°65°1%
- Mon95°65°1%
- Tue98°69°2%
- Wed83°68°10%
- Thu85°67°3%
- Fri88°67°3%
- Sat84°63°6%
- Sun88°59°6%
- Mon81°68°6%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Roseville
Interactive wind and temperature map centered on Roseville — it loads in your browser. Open the full weather map.
Right now in the garden
Late season
As of September 21, the first frost (around November 24) is about 9 weeks away. Frost-tender plants keep producing until then. This city's planting calendar for September: plant beans, squash, fall brassicas, and carrots; harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Roseville
Roseville sits in Placer County, where the year’s longest day runs 14h 53m of daylight and its shortest just 9h 27m — a swing of +5h 26m 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 360 miles to the SSE. The nearest town Roseville tracks is Sacramento, roughly 16 miles to the SSW.
Air quality in Roseville
Air quality in Roseville’s county has trended cleaner since 2020; its cleanest year on record was 2024 (median AQI 50). See the full air-quality history for Roseville.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | — |
| February | lettuce, peas, spinach, radishes | radishes |
| March | lettuce, peas, spinach, radishes | lettuce, spinach, radishes |
| April | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| May | tomatoes, peppers, beans, squash | lettuce, peas, spinach, garlic |
| June | beans, squash | beans, summer squash |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash |
| August | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| September | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| November | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| December | — | fall brassicas, carrots |
A year in weather
Roseville's warmest month is July (~76°F mean) and its coldest is December (~46°F). Rainfall peaks in January (3.7 inches) and bottoms out in July (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
Similar climates Antelope, CA, Rocklin, CA, Citrus Heights, CA
Drawing on NOAA NCEI 1991-2020 normals, Roseville's January averages 47°F and July 76°F — 30°F apart — while precipitation totals roughly 18 inches over some 36 days.
Cool-season fronts carry Roseville's rain: January logs 3.7 inches on 5.9 days, against July's 0.0 inches on 0.0 — winter does the heavy lifting in Roseville. It is a winter-storm rhythm Roseville shares with places like Antelope, CA, Rocklin, CA and Citrus Heights, CA.
The cool-season window in Roseville starts at February 22, when nights stop freezing — think lettuce, chard, arugula, and mustard greens. Hold Roseville's tender crops — tomatoes, peppers, basil — until 10-14 days past Roseville's last frost. Around November 24, freezing nights resume in Roseville and tender crops must come in. In about half of years, Roseville's last freeze comes after February 22.
Similar climates: Antelope, CA, Rocklin, CA, Citrus Heights, CA, Foothill Farms, CA, Loomis, CA.
Frequently asked
- When does it freeze in Roseville?
- In Roseville, expect the last spring frost near February 22; Roseville's first autumn frost comes around November 24.
- What is the rainy season in Roseville?
- Rainfall in Roseville peaks in January near 3.7 inches, out of about 18 inches annually.
- What is the warmest month in Roseville?
- On average July tops the year in Roseville at about 76°F.
- What is the coldest month in Roseville?
- The coldest stretch in Roseville falls in December, around 46°F on average.
- When can I start a vegetable garden in Roseville?
- Hardy spring crops go in near February 22 in Roseville; tender peppers and squash wait 10–14 days.
- How many rainy days does Roseville get?
- Roseville records around 36 days of measurable precipitation annually.
- What hardiness zone is Roseville?
- Because Roseville bottoms near 46°F in December, that winter low sets Roseville's USDA zone — verify by ZIP.
- What is the 10-day forecast for Roseville?
- Roseville'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 Roseville?
- See this week's day-by-day rain chances for Roseville in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Roseville?
- Current conditions for Roseville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Roseville forecast updated?
- The Roseville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Roseville?
- Today's sunrise and sunset times for Roseville 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 Roseville?
- The next few days in Roseville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Roseville sits at 38.8°N; its climate zone is hot-summer Mediterranean (Köppen approximation).
ZIP codes in Roseville
- 95661
- 95678
- 95747