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Los Alamitos, California Weather

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

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

Los Alamitos, CA
Sunday, July 5 at 11:02 AM
77
°
Clear
Feels like
81°
Humidity
63%
Wind
8 mph
Sunrise
10:47 PM
Sunset
1:06 PM
Los Alamitos, CA
Hour by hour · 24h
24-Hour ForecastLos Alamitos, CA: 24-hour forecast. Temperatures range from 61 to 84 degrees Fahrenheit.
L 61°H 84°
Los Alamitos, CA
7-day forecast
  1. Today
    Jul 5
    Foggy
    —
    —
    84°65°—
  2. Monday
    Jul 6
    Partly Cloudy
    —
    —
    82°61°-2°
  3. Tuesday
    Jul 7
    Clear
    —
    —
    82°63°0°
  4. Wednesday
    Jul 8
    Clear
    —
    —
    84°69°+2°
  5. Thursday
    Jul 9
    Clear
    —
    —
    81°70°-3°
  6. Friday
    Jul 10
    Overcast
    —
    —
    81°69°0°
  7. Saturday
    Jul 11
    Overcast
    —
    —
    79°70°-2°
Los Alamitos, CA
Next 24 hours · Mild now
HOT 90°55°73°90°6a12p6p12anow 77°high 84°low 61°
Los Alamitos, CA
Anemometer · 24h winds · from true
NESW
From · True
SW
225° · backing 32°
Direction
SW
225°
Sustained
8
mph
Gust
9
mph
Peak 24h
15
avg 4
Beaufort · 3 · GENTLE 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 4 · pk 15 @ 9:00p
010MPHB1B2B3B4-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 115SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 32° from the sw.
Los Alamitos, CA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1013.6
-0.6 mb in 3h · falling · 29.93 inHg
Now
1013.6
mb
3h
-0.6
mb
12h
-0.4
mb
24h
-1.6
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-24hNOW1015.21012.51013.6
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
Los Alamitos, CA
Air quality
36
AQI
Good
→0 in 6h

AQI 36 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 9.7 µg/m³, PM10 at 13.3 µg/m³ — typical background levels with no transport signature.

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

PM 2.5DRIVERGood
9.7μg/m³
PM 10Good
13μg/m³
NO₂Good
6μg/m³
OzoneGood
60μg/m³
UV IndexVery high
9.8

What's driving it

PM × Wind × Precip

PM2.5 at 9.7 µg/m³, PM10 at 13.3 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.73
Wind
light
Recent rain
0h in last 6h
Pattern
background

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
Los Alamitos, CA
Sky cover · visibility · 24h
Cloud cover
9%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
51.4mi
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
18:02 UTC · Los Alamitos, 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
18:02 UTC · Los Alamitos, CA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Los Alamitos, CA
Satellite · infrared · animated
Los Alamitos, CA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Los Alamitos, CA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:19 AM
Sunrise
10:47 PM
Daylight
14h 19m
Sunset
1:06 PM
Civil dusk
8:36 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Los Alamitos, CA
The moon
Waning Gibbous
70% illuminated
Moonrise
11:08 PM
Moonset
11:11 AM
In sign
♓︎ Pisces
Los Alamitos, 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 →

Los Alamitos at a glance

  • Today vs. normal: 77°F — typical for the season
  • Last frost: March 10 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 90720

16-Day Forecast — Los Alamitos

  1. Sun84°65°1%
  2. Mon82°61°0%
  3. Tue82°63°0%
  4. Wed84°69°0%
  5. Thu81°70°0%
  6. Fri81°69°0%
  7. Sat79°70°0%
  8. Sun85°70°1%
  9. Mon88°70°5%
  10. Tue85°74°9%
  11. Wed87°74°3%
  12. Thu93°76°10%
  13. Fri91°74°10%
  14. Sat86°74°10%
  15. Sun84°73°19%
  16. Mon90°73°19%

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

Los Alamitos's warmest month is August (~73°F mean) and its coldest is January (~54°F). Rainfall peaks in February (2.5 inches) and bottoms out in August (0.0 inches).

MonthMean tempPrecipRainy days
January54°2.3″9
February56°2.5″8
March58°2.0″9
April61°0.9″7
May64°0.3″4
June68°0.0″2
July72°0.1″1
August73°0.0″0
September72°0.0″2
October68°0.3″3
November60°1.1″6
December54°1.8″7

Regional context

Per NOAA NCEI 1991-2020 normals, Los Alamitos runs from a 54°F January mean to 72°F in July, a 18°F seasonal spread, with near 11.3 inches of precipitation across about 57 wet days.

Precipitation in Los Alamitos peaks in the cool season: February averages 2.5 inches across 7.6 storm-fed days, while August bottoms out at 0.0 inches over just 0.2 rainy days. That groups Los Alamitos with places like Rossmoor, CA, Cypress, CA and Hawaiian Gardens, CA on the same cool-season storm track.

Hard freezes are rare in Los Alamitos: the coldest month averages 54°F, so Los Alamitos's growing window runs most of the year. August is the hottest stretch near 73°F, pushing cool-season crops to the milder shoulder months. Across Los Alamitos, elevation and tree cover drive a 4-7°F spread in Los Alamitos's overnight lows.

Similar climates: Rossmoor, CA, Cypress, CA, Hawaiian Gardens, CA, Seal Beach, CA, Stanton, CA.

Frequently asked

When does it freeze in Los Alamitos?
Los Alamitos's last spring frost lands near mid-March, and in Los Alamitos the first fall frost follows around mid-December.
What is the rainy season in Los Alamitos?
Rainfall in Los Alamitos peaks in February near 2.5 inches, out of about 11 inches annually.
What is the warmest month in Los Alamitos?
The warmest stretch in Los Alamitos comes in August, around 73°F on average.
What is the coldest month in Los Alamitos?
On average January is the chilliest month in Los Alamitos, about 54°F.
When can I start a vegetable garden in Los Alamitos?
Los Alamitos's last frost (mid-March) cues hardy greens; in Los Alamitos, hold heat-lovers two weeks past.
How many rainy days does Los Alamitos get?
Expect roughly 57 wet days a year in Los Alamitos.
What hardiness zone is Los Alamitos?
Los Alamitos's USDA zone comes from its January mean (54°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Los Alamitos?
Los Alamitos'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 Los Alamitos?
See this week's day-by-day rain chances for Los Alamitos in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Los Alamitos?
Current conditions for Los Alamitos and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Los Alamitos forecast updated?
The Los Alamitos forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Los Alamitos?
Today's sunrise and sunset times for Los Alamitos 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 Los Alamitos?
The next few days in Los Alamitos's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Los Alamitos's hot-summer Mediterranean climate in California pairs 54°F Januarys with 72°F Julys, 18°F apart across the seasons.

Yearly precipitation in Los Alamitos totals around 11 inches, spread over about 57 days of rain or snow.

The 18°F gap between Los Alamitos's summer and winter, at 33.8°N, shapes Los Alamitos's frost calendar.

All cities in California →

Westminster, CA weather →

ZIP codes in Los Alamitos

  • 90720
  • 90721

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.