Weather StoryAlmanac, microseasons, and the day's weather story.

Pacheco, California Weather

Bay laurel fragrance sweetens shade. Day 89 of spring. Read this microseason across nine climate regions →

Pacheco weather forecast — hour by hour, 7-day outlook, NOAA radar

Pacheco, CA
Monday, June 15 at 10:40 PM
61
°
Clear
Feels like
61°
Humidity
79%
Wind
5 mph
Sunrise
10:45 PM
Sunset
1:32 PM
Pacheco, CA
Hour by hour · 24h
24-Hour ForecastPacheco, CA: 24-hour forecast. Temperatures range from 58 to 80 degrees Fahrenheit.
L 58°H 80°
Pacheco, CA
7-day forecast
  1. Today
    Jun 15
    Partly Cloudy
    —
    —
    80°57°—
  2. Tuesday
    Jun 16
    Clear
    —
    —
    80°58°0°
  3. Wednesday
    Jun 17
    Mostly Clear
    —
    —
    77°57°-3°
  4. Thursday
    Jun 18
    Mostly Clear
    —
    —
    75°58°-2°
  5. Friday
    Jun 19
    Clear
    —
    —
    73°58°-2°
  6. Saturday
    Jun 20
    Clear
    —
    —
    75°58°+2°
  7. Sunday
    Jun 21
    Partly Cloudy
    —
    —
    80°56°+5°
Pacheco, CA
Next 24 hours · Cool now
50°68°85°6p12a6a12pnow 62°high 80°low 58°
Pacheco, CA
Anemometer · 24h winds · from true
NESW
From · True
SSW
211° · veering 150°
Direction
SSW
211°
Sustained
5
mph
Gust
18
mph
Peak 24h
19
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 19 @ 10:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 197SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 150° from the ssw.
Pacheco, CA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1013.3
+1.1 mb in 3h · rising · 29.92 inHg
Now
1013.3
mb
3h
+1.1
mb
12h
-0.5
mb
24h
+0.9
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1013–1015
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1014.71012.81014.0
−24h−18h−12h−6hnow
Pressure climbing through the change line — drier air pushing in.
Pacheco, CA
Air quality
42
AQI
Good
→-2 in 6h

AQI 42 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 9.6 µg/m³ (AQI 52) with a 0.73 fine-to-coarse ratio and 5 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
9.6μg/m³
PM 10Good
13μg/m³
NO₂Good
10μg/m³
OzoneGood
59μg/m³
UV IndexLow
0.0

What's driving it

PM × Wind × Precip

PM2.5 at 9.6 µg/m³ (AQI 52) with a 0.73 fine-to-coarse ratio and 5 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 TREND50100TUEWEDTHUFRISATSUNMONTUE7-DAY PM2.5 TREND · μg/m³300
Pacheco, CA
Sky cover · visibility · 24h
Cloud cover
2%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
36.3mi
UNLIMITED
82 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
05:40 UTC · Pacheco, 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
05:40 UTC · Pacheco, CA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Pacheco, CA
Satellite · infrared · animated
Pacheco, CA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Pacheco, CA
Almanac · Monday, June 15
Cut your thistles before St. John, you will have two instead of one.
Civil dawn
5:15 AM
Sunrise
10:45 PM
Daylight
14h 47m
Sunset
1:32 PM
Civil dusk
9:05 PM
Planting note
Stake and prune tomato suckers. Watch for squash vine borers.
Pacheco, CA
The moon
Waxing Crescent
2% illuminated
Moonrise
7:06 AM
Moonset
9:53 PM
In sign
♋︎ Cancer
Pacheco, CA
Microseason
Jun 16–20

Bay laurel fragrance sweetens shade

weather
Jan 146% of the yearDec 31

Read this microseason across nine climate regions →

Pacheco at a glance

  • Today vs. normal: 16°F below the seasonal normal for this latitude
  • Last frost: April 4 (climatological average for this latitude)
  • Microseason: Jun 16–20
  • Planting window: Stake and prune tomato suckers. Watch for squash vine borers.

16-Day Forecast — Pacheco

  1. Mon80°57°0%
  2. Tue80°58°0%
  3. Wed77°57°0%
  4. Thu75°58°0%
  5. Fri73°58°1%
  6. Sat75°58°0%
  7. Sun80°56°0%
  8. Mon77°57°1%
  9. Tue82°57°0%
  10. Wed88°59°0%
  11. Thu79°59°0%
  12. Fri80°56°0%
  13. Sat95°61°0%
  14. Sun91°64°0%
  15. Mon79°61°0%
  16. Tue77°59°0%

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

Right now in the garden

Peak growing season

As of June 16, 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 · June 16–20

Bay laurel fragrance sweetens shade

In cooler coastal canyons, bay laurel foliage releases its sharp, anise-like scent as temperatures climb.

Day 167 of 365 · Wedge 34 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——
March——
Aprillettuce, peas, spinach, radishes—
Maylettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
August—tomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
November——
December——

A year in weather

Pacheco's warmest month is July (~70°F mean) and its coldest is January (~49°F). Rainfall peaks in January (3.5 inches) and bottoms out in July (0.0 inches).

MonthMean tempPrecipRainy days
January49°3.5″13
February51°3.3″12
March53°2.7″13
April58°1.4″9
May64°0.5″4
June68°0.0″1
July70°0.0″1
August70°0.0″1
September69°0.1″1
October64°0.6″4
November55°2.2″8
December49°3.2″12

Regional context

Drawing on NOAA NCEI 1991-2020 normals, Pacheco's January averages 49°F and July 70°F — 22°F apart — while precipitation totals roughly 17.5 inches over some 79 days.

Cool-season fronts carry Pacheco's rain: January logs 3.5 inches on 13.3 days, against July's 0.0 inches on 0.9 — winter does the heavy lifting in Pacheco. That groups Pacheco with places like Vine Hill, CA, Pleasant Hill, CA and Martinez, CA on the same cool-season storm track.

Pacheco rarely sees a hard freeze — its coldest month sits near 49°F — so planting spans most of the calendar. Heat peaks in July around 70°F, which confines cool-season crops to the shoulders of summer. Pacheco's coastal lots stay 4-7°F milder overnight than Pacheco's inland parcels.

Similar climates: Vine Hill, CA, Pleasant Hill, CA, Martinez, CA, Clyde, CA, Reliez Valley, CA.

Frequently asked

When does it freeze in Pacheco?
Frost typically leaves Pacheco by mid-April and returns to Pacheco near mid-November.
What is the rainy season in Pacheco?
Rainfall in Pacheco peaks in January near 3.5 inches, out of about 18 inches annually.
What is the warmest month in Pacheco?
On average July tops the year in Pacheco at about 70°F.
What is the coldest month in Pacheco?
The coldest stretch in Pacheco falls in January, around 49°F on average.
When can I start a vegetable garden in Pacheco?
Around mid-April, start frost-hardy crops in Pacheco; tomatoes and basil belong a fortnight later.
How many rainy days does Pacheco get?
Pacheco records around 79 days of measurable precipitation annually.
What hardiness zone is Pacheco?
Because Pacheco bottoms near 49°F in January, that winter low sets Pacheco's USDA zone — verify by ZIP.
What is the 10-day forecast for Pacheco?
Pacheco'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 Pacheco?
See this week's day-by-day rain chances for Pacheco in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Pacheco?
Current conditions for Pacheco and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Pacheco forecast updated?
The Pacheco forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Pacheco?
Day length in Pacheco peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
How accurate is the weather forecast for Pacheco?
The next few days in Pacheco's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

In Pacheco, California, the hot-summer Mediterranean climate runs from about 49°F in January to 70°F in July, a 21°F seasonal range.

Yearly precipitation in Pacheco totals around 18 inches, spread over about 79 days of rain or snow.

Pacheco's 21°F range, set by its 38.0°N position, drives frost timing and what thrives in Pacheco.

All cities in California →

Concord, CA weather →

ZIP codes in Pacheco

  • 94553

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.