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

Lake Arrowhead, California Weather

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

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

Lake Arrowhead, CA
Sunday, July 5 at 9:58 AM
72
°
Mostly Clear
Feels like
66°
Humidity
37%
Wind
11 mph
Sunrise
10:42 PM
Sunset
1:04 PM
Lake Arrowhead, CA
Hour by hour · 24h
24-Hour ForecastLake Arrowhead, CA: 24-hour forecast. Temperatures range from 60 to 75 degrees Fahrenheit.
L 60°H 75°
Lake Arrowhead, CA
7-day forecast
  1. Today
    Jul 5
    Overcast
    —
    —
    75°61°—
  2. Monday
    Jul 6
    Clear
    —
    —
    77°60°+2°
  3. Tuesday
    Jul 7
    Clear
    —
    —
    87°60°+10°
  4. Wednesday
    Jul 8
    Clear
    —
    —
    90°62°+3°
  5. Thursday
    Jul 9
    Clear
    —
    —
    89°63°-1°
  6. Friday
    Jul 10
    Clear
    —
    —
    88°60°-1°
  7. Saturday
    Jul 11
    Overcast
    —
    —
    87°60°-1°
Lake Arrowhead, CA
Next 24 hours · Mild now
56°67°78°6a12p6p12anow 73°high 75°low 60°
Lake Arrowhead, CA
Anemometer · 24h winds · from true
NESW
From · True
SSW
195° · veering 6°
Direction
SSW
195°
Sustained
11
mph
Gust
15
mph
Peak 24h
27
avg 13
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 13 · pk 27 @ 1:00a
0102030MPHB1B2B3B4B5B6-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 243SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 6° from the ssw.
Lake Arrowhead, CA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
847.2
+3.3 mb in 3h · rising rapidly · 25.02 inHg
Now
847.2
mb
3h
+3.3
mb
12h
+1.1
mb
24h
-1.6
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 844–851
835840845850855-21h-18h-15h-12h-9h-6h-3h-24hNOW850.6843.7847.8
−24h−18h−12h−6hnow
The low is filling — pressure climbing out of storm territory.
Lake Arrowhead, CA
Air quality
29
AQI
Good
→+2 in 6h▲Peak ~35 @ 11 PM

AQI 29 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.0 µg/m³, PM10 at 8.8 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
7.0μg/m³
PM 10Good
9μg/m³
NO₂Good
5μg/m³
OzoneModerate
64μg/m³
UV IndexModerate
4.3

What's driving it

Ozone × UV × Sky

Ozone at AQI 30 now. With UV 8.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 34 around 1 PM.

Present
AQI 30
UV peak
8.6 at 1 PM
Sky at peak
clear
Projected peak
AQI 34

PM × Wind × Precip

PM2.5 at 7.0 µg/m³, PM10 at 8.8 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.80
Wind
breezy
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
Lake Arrowhead, CA
Sky cover · visibility · 24h
Cloud cover
39%
MOSTLY CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
102.3mi
UNLIMITED
159 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
16:58 UTC · Lake Arrowhead, 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
16:58 UTC · Lake Arrowhead, CA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Lake Arrowhead, CA
Satellite · infrared · animated
Lake Arrowhead, CA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Lake Arrowhead, CA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:14 AM
Sunrise
10:42 PM
Daylight
14h 22m
Sunset
1:04 PM
Civil dusk
8:34 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Lake Arrowhead, CA
The moon
Waning Gibbous
71% illuminated
Moonrise
11:05 PM
Moonset
11:07 AM
In sign
♓︎ Pisces
Lake Arrowhead, 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 →

Lake Arrowhead at a glance

  • Today vs. normal: 5°F below the seasonal normal for this latitude
  • Last frost: March 13 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 92352

16-Day Forecast — Lake Arrowhead

  1. Sun75°61°2%
  2. Mon77°60°1%
  3. Tue87°60°0%
  4. Wed90°62°0%
  5. Thu89°63°0%
  6. Fri88°60°1%
  7. Sat87°60°2%
  8. Sun90°62°4%
  9. Mon89°65°15%
  10. Tue85°65°23%
  11. Wed85°66°12%
  12. Thu87°66°16%
  13. Fri95°70°17%
  14. Sat99°74°12%
  15. Sun91°69°13%
  16. Mon89°66°13%

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

August is Lake Arrowhead's warmest stretch (~79°F) and December its coldest (~49°F); precipitation crests in February at 2.0 inches and ebbs in June to 0.0 inches.

MonthMean tempPrecipRainy days
January49°1.9″9
February51°2.0″9
March53°1.8″11
April59°0.9″8
May66°0.3″5
June72°0.0″2
July79°0.4″3
August79°0.3″3
September75°0.2″3
October67°0.4″4
November56°0.9″6
December49°1.6″9

Regional context

Per NOAA NCEI 1991-2020 normals, Lake Arrowhead runs from a 49°F January mean to 79°F in July, a 30°F seasonal spread, with near 10.9 inches of precipitation across about 72 wet days.

Precipitation in Lake Arrowhead peaks in the cool season: February averages 2.0 inches across 9.4 storm-fed days, while June bottoms out at 0.0 inches over just 1.6 rainy days. That groups Lake Arrowhead with places like Crestline, CA, Running Springs, CA and San Bernardino, CA on the same cool-season storm track.

With a coldest-month mean of 49°F, Lake Arrowhead stays mostly frost-free and grows year-round. The August peak near 79°F is Lake Arrowhead's real limit, pushing cool-season vegetables to spring and fall. Within Lake Arrowhead, low or inland lots lose 3-5°F overnight versus Lake Arrowhead's coastal ground.

Similar climates: Crestline, CA, Running Springs, CA, San Bernardino, CA, Highland, CA, Muscoy, CA.

Frequently asked

When does it freeze in Lake Arrowhead?
Lake Arrowhead's last spring frost lands near mid-March, and in Lake Arrowhead the first fall frost follows around mid-December.
What is the rainy season in Lake Arrowhead?
Lake Arrowhead sees its heaviest rain in February (around 2.0 inches), part of roughly 11 inches a year.
What is the warmest month in Lake Arrowhead?
August is Lake Arrowhead's warmest month, averaging about 79°F.
What is the coldest month in Lake Arrowhead?
Lake Arrowhead bottoms out in December, with a mean near 49°F.
When can I start a vegetable garden in Lake Arrowhead?
Frost-hardy sowings begin at mid-March in Lake Arrowhead; warm-season starts follow two weeks on.
How many rainy days does Lake Arrowhead get?
Lake Arrowhead records around 72 days of measurable precipitation annually.
What hardiness zone is Lake Arrowhead?
Lake Arrowhead's hardiness zone tracks its winter low; with December near 49°F, check the USDA ZIP map for the exact zone.
What is the 10-day forecast for Lake Arrowhead?
Lake Arrowhead'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 Lake Arrowhead?
See this week's day-by-day rain chances for Lake Arrowhead in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Lake Arrowhead?
Current conditions for Lake Arrowhead and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Lake Arrowhead forecast updated?
The Lake Arrowhead forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Lake Arrowhead?
Today's sunrise and sunset times for Lake Arrowhead 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 Lake Arrowhead?
The next few days in Lake Arrowhead's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Lake Arrowhead, California has a hot-summer Mediterranean climate: January averages roughly 49°F, July about 79°F, 30°F between them.

Yearly precipitation in Lake Arrowhead totals around 11 inches, spread over about 72 days of rain or snow.

Latitude 34.3°N gives Lake Arrowhead its 30°F swing, and with it the rhythm of Lake Arrowhead's growing season.

All cities in California →

San Bernardino, CA weather →

ZIP codes in Lake Arrowhead

  • 92391
  • 92378
  • 92317
  • 92385
  • 92352
  • 92321

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.