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

Crestline, California Weather

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

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

Crestline, CA
Sunday, July 5 at 10:49 AM
71
°
Partly Cloudy
Feels like
68°
Humidity
33%
Wind
11 mph
Sunrise
10:42 PM
Sunset
1:04 PM
Crestline, CA
Hour by hour · 24h
24-Hour ForecastCrestline, CA: 24-hour forecast. Temperatures range from 59 to 74 degrees Fahrenheit.
L 59°H 74°
Crestline, CA
7-day forecast
  1. Today
    Jul 5
    Overcast
    —
    —
    74°60°—
  2. Monday
    Jul 6
    Clear
    —
    —
    76°59°+2°
  3. Tuesday
    Jul 7
    Clear
    —
    —
    86°55°+10°
  4. Wednesday
    Jul 8
    Clear
    —
    —
    91°58°+5°
  5. Thursday
    Jul 9
    Clear
    —
    —
    89°59°-2°
  6. Friday
    Jul 10
    Overcast
    —
    —
    88°57°-1°
  7. Saturday
    Jul 11
    Overcast
    —
    —
    86°57°-2°
Crestline, CA
Next 24 hours · Mild now
56°67°78°6a12p6p12anow 69°high 74°low 59°
Crestline, CA
Anemometer · 24h winds · from true
NESW
From · True
S
181° · backing 17°
Direction
S
181°
Sustained
11
mph
Gust
13
mph
Peak 24h
23
avg 11
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 11 · pk 23 @ 4:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 195SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 17° from the s.
Crestline, CA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
850.8
+1.9 mb in 3h · rising · 25.12 inHg
Now
850.8
mb
3h
+1.9
mb
12h
-0.1
mb
24h
-3.2
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 848–854
840845850855860-21h-18h-15h-12h-9h-6h-3h-24hNOW854.3847.6850.4
−24h−18h−12h−6hnow
The low is filling — pressure climbing out of storm territory.
Crestline, 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 5.6 µg/m³, PM10 at 7.2 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
5.6μg/m³
PM 10Good
7μg/m³
NO₂Good
3μg/m³
OzoneModerate
65μg/m³
UV IndexVery high
7.5

What's driving it

Ozone × UV × Sky

Ozone at AQI 31 now. With UV 11 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 44 around 1 PM.

Present
AQI 31
UV peak
10.6 at 1 PM
Sky at peak
clear
Projected peak
AQI 44

PM × Wind × Precip

PM2.5 at 5.6 µg/m³, PM10 at 7.2 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.78
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
Crestline, CA
Sky cover · visibility · 24h
Cloud cover
63%
PARTLY CLOUDY
100%0%−24h−18h−12h−6hnow
Visibility
115.6mi
UNLIMITED
152 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
17:49 UTC · Crestline, 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
17:49 UTC · Crestline, CA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Crestline, CA
Satellite · infrared · animated
Crestline, CA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Crestline, 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.
Crestline, CA
The moon
Waning Gibbous
71% illuminated
Moonrise
11:05 PM
Moonset
11:08 AM
In sign
♓︎ Pisces
Crestline, 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 →

Crestline at a glance

  • Today vs. normal: 6°F below 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.

ZIP code: 92325

16-Day Forecast — Crestline

  1. Sun74°60°1%
  2. Mon76°59°1%
  3. Tue86°55°0%
  4. Wed91°58°0%
  5. Thu89°59°0%
  6. Fri88°57°1%
  7. Sat86°57°1%
  8. Sun87°57°2%
  9. Mon89°62°10%
  10. Tue86°63°17%
  11. Wed87°65°7%
  12. Thu88°64°13%
  13. Fri96°68°14%
  14. Sat102°75°12%
  15. Sun90°68°19%
  16. Mon88°62°18%

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 Crestline'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

Crestline's climate, from NOAA NCEI 1991-2020 station normals, pairs 49°F Januarys with 79°F Julys — a 30°F swing. About 10.9 inches of precipitation falls over roughly 72 days a year.

Crestline's moisture rides winter storm tracks: February brings 2.0 inches over 9.4 wet days, while June sees only 0.0 inches across 1.6 days in the dry warm season. That cool-season-wet pattern aligns Crestline with places like Lake Arrowhead, CA, Muscoy, CA and San Bernardino, CA.

Freezes are uncommon in Crestline, where the coldest month averages 49°F; cool-season crops grow fall through spring. Summer heat in August (about 79°F) is the binding constraint, not cold. Crestline's coastal lots stay 4-7°F milder overnight than Crestline's inland parcels.

Similar climates: Lake Arrowhead, CA, Muscoy, CA, San Bernardino, CA, Running Springs, CA, Hesperia, CA.

Frequently asked

When does it freeze in Crestline?
Crestline's last spring frost lands near mid-March, and in Crestline the first fall frost follows around mid-December.
What is the rainy season in Crestline?
February is the wettest month in Crestline, about 2.0 inches on average; the year totals roughly 11 inches.
What is the warmest month in Crestline?
On average August tops the year in Crestline at about 79°F.
What is the coldest month in Crestline?
The coldest stretch in Crestline falls in December, around 49°F on average.
When can I start a vegetable garden in Crestline?
Around mid-March, start frost-hardy crops in Crestline; tomatoes and basil belong a fortnight later.
How many rainy days does Crestline get?
Crestline records around 72 days of measurable precipitation annually.
What hardiness zone is Crestline?
Since December in Crestline averages 49°F, Crestline's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Crestline?
Crestline'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 Crestline?
See this week's day-by-day rain chances for Crestline in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Crestline?
Current conditions for Crestline and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Crestline forecast updated?
The Crestline forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Crestline?
Today's sunrise and sunset times for Crestline 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 Crestline?
The next few days in Crestline's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

The hot-summer Mediterranean climate of Crestline, California carries typical Januarys near 49°F and Julys around 79°F — 30°F of seasonal travel.

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

From 34.2°N, Crestline sees a 30°F seasonal swing that governs Crestline's planting and frost windows.

All cities in California →

San Bernardino, CA weather →

ZIP codes in Crestline

  • 92391
  • 92407
  • 92322
  • 92325

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.