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Santa Rosa Valley, California Weather

Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →

Santa Rosa Valley weather forecast — hour by hour, 7-day outlook, NOAA radar

Santa Rosa Valley, CA
Sunday, July 5 at 10:59 AM
82
°
Clear
Feels like
84°
Humidity
42%
Wind
6 mph
Sunrise
10:49 PM
Sunset
1:10 PM
Santa Rosa Valley, CA
Hour by hour · 24h
24-Hour ForecastSanta Rosa Valley, CA: 24-hour forecast. Temperatures range from 56 to 82 degrees Fahrenheit.
L 56°H 82°
Santa Rosa Valley, CA
7-day forecast
  1. Today
    Jul 5
    Overcast
    —
    —
    82°61°—
  2. Monday
    Jul 6
    Mostly Clear
    —
    —
    80°56°-2°
  3. Tuesday
    Jul 7
    Clear
    —
    —
    87°60°+7°
  4. Wednesday
    Jul 8
    Clear
    —
    —
    90°62°+3°
  5. Thursday
    Jul 9
    Clear
    —
    —
    93°64°+3°
  6. Friday
    Jul 10
    Partly Cloudy
    —
    —
    92°63°-1°
  7. Saturday
    Jul 11
    Overcast
    —
    —
    96°64°+4°
Santa Rosa Valley, CA
Next 24 hours · Mild now
HOT 90°50°70°90°6a12p6p12anow 79°high 82°low 56°
Santa Rosa Valley, CA
Anemometer · 24h winds · from true
NESW
From · True
WNW
283° · steady
Direction
WNW
283°
Sustained
6
mph
Gust
6
mph
Peak 24h
16
avg 6
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 6 · pk 16 @ 4:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 164SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Santa Rosa Valley, CA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
998.1
-0.4 mb in 3h · steady · 29.47 inHg
Now
998.1
mb
3h
-0.4
mb
12h
-0.8
mb
24h
-2.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 998–1000
9909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1000.1997.5997.5
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Santa Rosa Valley, CA
Air quality
45
AQI
Good
→-1 in 6h

AQI 45 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.2 µg/m³ (AQI 55) with a 0.73 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
11.2μg/m³
PM 10Good
15μg/m³
NO₂Good
4μg/m³
OzoneModerate
70μg/m³
UV IndexHigh
6.7

What's driving it

Ozone × UV × Sky

Ozone at AQI 33 now. With UV 9.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 42 around 1 PM.

Present
AQI 33
UV peak
9.5 at 1 PM
Sky at peak
clear
Projected peak
AQI 42

PM × Wind × Precip

PM2.5 at 11.2 µg/m³ (AQI 55) with a 0.73 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.73
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).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³300
Santa Rosa Valley, CA
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
88.3mi
UNLIMITED
95 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
17:59 UTC · Santa Rosa Valley, CA · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
17:59 UTC · Santa Rosa Valley, CA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Santa Rosa Valley, CA
Satellite · infrared · animated
Santa Rosa Valley, CA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Santa Rosa Valley, CA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:21 AM
Sunrise
10:49 PM
Daylight
14h 21m
Sunset
1:10 PM
Civil dusk
8:41 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Santa Rosa Valley, CA
The moon
Waning Gibbous
70% illuminated
Moonrise
11:12 PM
Moonset
11:14 AM
In sign
♓︎ Pisces
Santa Rosa Valley, CA
Microseason
Jul 1–5

Summer heat deepens across the valleys

weather
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Santa Rosa Valley at a glance

  • Today vs. normal: 5°F above the seasonal normal for this latitude
  • Last frost: March 12 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

16-Day Forecast — Santa Rosa Valley

  1. Sun82°61°1%
  2. Mon80°56°0%
  3. Tue87°60°0%
  4. Wed90°62°0%
  5. Thu93°64°0%
  6. Fri92°63°0%
  7. Sat96°64°1%
  8. Sun83°64°3%
  9. Mon94°64°5%
  10. Tue100°74°6%
  11. Wed97°72°1%
  12. Thu100°73°10%
  13. Fri100°76°10%
  14. Sat95°70°6%
  15. Sun96°73°6%
  16. Mon96°67°7%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 5, 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.

January 1–5: New year in coastal mist.January 6–10: Hills hold the winter cold.January 11–15: Light lengthens over wet earth.January 16–20: The green pulse quickens.January 21–25: Spring green spreads inland.January 26–31: Winter's grip releases.February 1–5: Fog lifts, flowers open.February 6–10: Blooms erupt across chaparral.February 11–15: Winter blooms at their peak.February 16–20: Rivers recede, flowers spread.February 21–25: Earth warms, flowers rush upslope.February 26–28: Spring advances on cool winds.March 1–5: Grass and trees bud and break.March 6–10: Insects wake and feed.March 11–15: Blossoms crown the hillsides.March 16–20: Monarch chrysalis emergence.March 21–25: Light overtakes dark at equinox.March 26–31: California poppy ablaze.April 1–5: Spring rain feeds the seedlings.April 6–10: Warblers flood the understory.April 11–15: Allen's hummingbirds in courtship dives.April 16–20: Coastal fog settles; sun breaks midday.April 21–25: Oak canopies full and green.April 26–30: Chaparral awakens after spring rains.May 1–5: Coastal wildflowers at their peak.May 6–10: Gray whales complete their migration north.May 11–15: Redwood coast in cool shade.May 16–20: Fog and sun in daily rhythm.May 21–25: Summer approaches; hills turn gold.May 26–31: Dry season begins; tule fog in valleys.June 1–5: Coastal fog thickens at dawn.June 6–10: California poppies fade as heat rises.June 11–15: Summer solstice light stretched thin.June 16–20: Bay laurel fragrance sweetens shade.June 21–25: Longest daylight, driest air.June 26–30: Fog banks mask the turning tide.July 1–5: Summer heat deepens across the valleys.July 6–10: Warm winds drive dryness inland.July 11–15: Pacific high settles in firmly.July 16–20: Young hawks take to the thermals.July 21–25: Peak fire season, peak heat.July 26–31: Chaparral poised for ignition.August 1–5: August begins in scorching stillness.August 6–10: Autumn's first cool breath arrives.August 11–15: Cool winds signal the turning year.August 16–20: Evening cicada chorus.August 21–25: Marine layer descent.August 26–31: Monarch staging begins.September 1–5: Fire season intensity.September 6–10: Dew on drying grasses.September 11–15: Raptor passage begins.September 16–20: Equinox descent.September 21–25: Ceanothus blooms again.September 26–30: Insects retreat below.October 1–5: Creeks begin to whisper.October 6–10: Santa Ana wind season.October 11–15: Wildflower anticipation.October 16–20: Chaparral embers glow.October 21–25: First atmospheric river looms.October 26–31: Rains return at last.November 1–5: Coast live oak leaves turn amber.November 6–10: California lilac blooms in winter light.November 11–15: First rain greens the chaparral.November 16–20: Coastal fog thickens as storms approach.November 21–25: Thanksgiving rains swell the valleys.November 26–30: Autumn's last breath yields to winter.December 1–5: December arrives, storms accelerate.December 6–10: Winter solstice season intensifies.December 11–15: Deep winter: rivers at flood stage.December 16–20: Winter salmon runs peak in northern rivers.December 21–25: Winter solstice: the sun turns.December 26–31: Year's end in wind and rain.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Summer heat deepens across the valleys

Inland temperatures exceed 95°F regularly; fire danger reaches moderate to high across most of the region.

Day 186 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
Marchlettuce, peas, spinach, radishes—
Aprillettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash—
Maytomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
July—tomatoes, beans, summer squash
August—tomatoes, beans, summer squash
September—tomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
Novemberfall brassicas, garlic (overwinter), carrots—
December——

A year in weather

In Santa Rosa Valley, August runs warmest near 70°F and December coldest around 56°F, while February is the wettest month (2.9 inches) and August the driest (0.0 inches).

MonthMean tempPrecipRainy days
January57°2.9″4
February57°2.9″5
March58°2.0″3
April60°0.6″1
May62°0.3″1
June66°0.1″0
July69°0.0″0
August70°0.0″0
September70°0.1″0
October65°0.5″1
November61°0.9″2
December56°1.7″3

Regional context

Drawing on NOAA NCEI 1991-2020 normals, Santa Rosa Valley's January averages 57°F and July 69°F — 13°F apart — while precipitation totals roughly 12 inches over some 19 days.

Precipitation in Santa Rosa Valley peaks in the cool season: February averages 2.9 inches across 4.5 storm-fed days, while August bottoms out at 0.0 inches over just 0.0 rainy days. That groups Santa Rosa Valley with places like Moorpark, CA, Thousand Oaks, CA and Casa Conejo, CA on the same cool-season storm track.

Santa Rosa Valley rarely sees a hard freeze — its coldest month sits near 56°F — so planting spans most of the calendar. Heat peaks in August around 70°F, which confines cool-season crops to the shoulders of summer. Santa Rosa Valley's coastal lots stay 4-7°F milder overnight than Santa Rosa Valley's inland parcels.

Similar climates: Moorpark, CA, Thousand Oaks, CA, Casa Conejo, CA, Somis, CA, Camarillo, CA.

Frequently asked

When does it freeze in Santa Rosa Valley?
Frost typically leaves Santa Rosa Valley by mid-March and returns to Santa Rosa Valley near mid-December.
What is the rainy season in Santa Rosa Valley?
Santa Rosa Valley sees its heaviest rain in February (around 2.9 inches), part of roughly 12 inches a year.
What is the warmest month in Santa Rosa Valley?
Santa Rosa Valley peaks in August, when the mean runs near 70°F.
What is the coldest month in Santa Rosa Valley?
December is Santa Rosa Valley's coldest month, averaging about 56°F.
When can I start a vegetable garden in Santa Rosa Valley?
In Santa Rosa Valley, sow peas and hardy greens around mid-March; Santa Rosa Valley's tomatoes and peppers wait two weeks more.
How many rainy days does Santa Rosa Valley get?
Santa Rosa Valley averages about 19 days with measurable rain or snow each year.
What hardiness zone is Santa Rosa Valley?
Because Santa Rosa Valley bottoms near 56°F in December, that winter low sets Santa Rosa Valley's USDA zone — verify by ZIP.
What is the 10-day forecast for Santa Rosa Valley?
Santa Rosa Valley'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 Santa Rosa Valley?
See this week's day-by-day rain chances for Santa Rosa Valley in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Santa Rosa Valley?
Current conditions for Santa Rosa Valley and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Santa Rosa Valley forecast updated?
The Santa Rosa Valley forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Santa Rosa Valley?
Today's sunrise and sunset times for Santa Rosa Valley 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 Santa Rosa Valley?
The next few days in Santa Rosa Valley's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

In Santa Rosa Valley, California, the hot-summer Mediterranean climate runs from about 57°F in January to 69°F in July, a 12°F seasonal range.

Yearly precipitation in Santa Rosa Valley totals around 12 inches, spread over about 19 days of rain or snow.

From 34.2°N, Santa Rosa Valley sees a 12°F seasonal swing that governs Santa Rosa Valley's planting and frost windows.

All cities in California →

Thousand Oaks, CA weather →

ZIP codes in Santa Rosa Valley

  • 93012

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.