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Casa de Oro-Mount Helix, California Weather

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

Casa de Oro-Mount Helix weather forecast — hour by hour, 7-day outlook, NOAA radar

Casa de Oro-Mount Helix, CA
Sunday, July 5 at 10:55 AM
78
°
Clear
Feels like
83°
Humidity
56%
Wind
7 mph
Sunrise
10:45 PM
Sunset
12:59 PM
Casa de Oro-Mount Helix, CA
Hour by hour · 24h
24-Hour ForecastCasa de Oro-Mount Helix, CA: 24-hour forecast. Temperatures range from 60 to 84 degrees Fahrenheit.
L 60°H 84°
Casa de Oro-Mount Helix, CA
7-day forecast
  1. Today
    Jul 5
    Foggy
    —
    —
    84°62°—
  2. Monday
    Jul 6
    Partly Cloudy
    —
    —
    84°60°0°
  3. Tuesday
    Jul 7
    Foggy
    —
    —
    83°60°-1°
  4. Wednesday
    Jul 8
    Clear
    —
    —
    86°69°+3°
  5. Thursday
    Jul 9
    Clear
    —
    —
    87°71°+1°
  6. Friday
    Jul 10
    Partly Cloudy
    —
    —
    87°72°0°
  7. Saturday
    Jul 11
    Overcast
    —
    —
    81°71°-6°
Casa de Oro-Mount Helix, CA
Next 24 hours · Mild now
HOT 90°55°73°90°6a12p6p12anow 75°high 84°low 60°
Casa de Oro-Mount Helix, CA
Anemometer · 24h winds · from true
NESW
From · True
W
266° · veering 8°
Direction
W
266°
Sustained
7
mph
Gust
8
mph
Peak 24h
11
avg 5
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 5 · pk 11 @ 3:00p
010MPHB1B2B3B4-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 124SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Casa de Oro-Mount Helix, CA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
984.9
-0.2 mb in 3h · steady · 29.08 inHg
Now
984.9
mb
3h
-0.2
mb
12h
-0.7
mb
24h
-2.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 984–987
9759809859909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW987.0983.9984.5
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Casa de Oro-Mount Helix, 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 10.0 µg/m³ (AQI 53), ratio 0.70 with 7 mph wind — characteristic of long-range haze transport rather than a local source.

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

PM 2.5DRIVERGood
10.0μg/m³
PM 10Good
14μg/m³
NO₂Good
3μg/m³
OzoneModerate
78μg/m³
UV IndexHigh
7.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 37 now. With UV 9.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 49 around 1 PM.

Present
AQI 37
UV peak
9.9 at 1 PM
Sky at peak
clear
Projected peak
AQI 49

PM × Wind × Precip

PM2.5 at 10.0 µg/m³ (AQI 53), ratio 0.70 with 7 mph wind — characteristic of long-range haze transport rather than a local source.

PM2.5/PM10
0.70
Wind
light
Recent rain
0h in last 6h
Pattern
transport

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
Casa de Oro-Mount Helix, CA
Sky cover · visibility · 24h
Cloud cover
3%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
64.8mi
UNLIMITED
111 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
17:55 UTC · Casa de Oro-Mount Helix, 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
17:55 UTC · Casa de Oro-Mount Helix, CA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Casa de Oro-Mount Helix, CA
Satellite · infrared · animated
Casa de Oro-Mount Helix, CA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Casa de Oro-Mount Helix, CA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:18 AM
Sunrise
10:45 PM
Daylight
14h 14m
Sunset
12:59 PM
Civil dusk
8:29 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Casa de Oro-Mount Helix, CA
The moon
Waning Gibbous
71% illuminated
Moonrise
11:03 PM
Moonset
11:07 AM
In sign
♓︎ Pisces
Casa de Oro-Mount Helix, 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 →

Casa de Oro-Mount Helix at a glance

  • Today vs. normal: 78°F — typical for the season
  • Last frost: March 4 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

16-Day Forecast — Casa de Oro-Mount Helix

  1. Sun84°62°0%
  2. Mon84°60°0%
  3. Tue83°60°0%
  4. Wed86°69°0%
  5. Thu87°71°0%
  6. Fri87°72°0%
  7. Sat81°71°1%
  8. Sun90°71°4%
  9. Mon92°73°13%
  10. Tue90°77°14%
  11. Wed91°78°5%
  12. Thu97°82°13%
  13. Fri98°82°19%
  14. Sat95°78°15%
  15. Sun91°79°14%
  16. Mon95°76°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 Casa de Oro-Mount Helix's warmest stretch (~74°F) and January its coldest (~55°F); precipitation crests in February at 2.1 inches and ebbs in July to 0.1 inches.

MonthMean tempPrecipRainy days
January55°2.0″10
February56°2.1″10
March58°1.9″12
April61°1.0″10
May64°0.3″10
June68°0.1″8
July73°0.1″3
August74°0.1″4
September73°0.1″5
October68°0.3″6
November61°1.0″7
December55°2.0″9

Regional context

Drawing on NOAA NCEI 1991-2020 normals, Casa de Oro-Mount Helix's January averages 55°F and July 73°F — 18°F apart — while precipitation totals roughly 11 inches over some 94 days.

Precipitation in Casa de Oro-Mount Helix peaks in the cool season: February averages 2.1 inches across 9.6 storm-fed days, while July bottoms out at 0.1 inches over just 3.0 rainy days. That cool-season-wet pattern aligns Casa de Oro-Mount Helix with places like Spring Valley, CA, El Cajon, CA and Rancho San Diego, CA.

Casa de Oro-Mount Helix rarely sees a hard freeze — its coldest month sits near 55°F — so planting spans most of the calendar. Heat peaks in August around 74°F, which confines cool-season crops to the shoulders of summer. Across Casa de Oro-Mount Helix, elevation and tree cover drive a 4-7°F spread in Casa de Oro-Mount Helix's overnight lows.

Similar climates: Spring Valley, CA, El Cajon, CA, Rancho San Diego, CA, La Mesa, CA, Bostonia, CA.

Frequently asked

When does it freeze in Casa de Oro-Mount Helix?
Casa de Oro-Mount Helix's last spring frost lands near mid-March, and in Casa de Oro-Mount Helix the first fall frost follows around mid-December.
What is the rainy season in Casa de Oro-Mount Helix?
Rainfall in Casa de Oro-Mount Helix peaks in February near 2.1 inches, out of about 11 inches annually.
What is the warmest month in Casa de Oro-Mount Helix?
On average August tops the year in Casa de Oro-Mount Helix at about 74°F.
What is the coldest month in Casa de Oro-Mount Helix?
The coldest stretch in Casa de Oro-Mount Helix falls in January, around 55°F on average.
When can I start a vegetable garden in Casa de Oro-Mount Helix?
Around mid-March, start frost-hardy crops in Casa de Oro-Mount Helix; tomatoes and basil belong a fortnight later.
How many rainy days does Casa de Oro-Mount Helix get?
Expect roughly 94 wet days a year in Casa de Oro-Mount Helix.
What hardiness zone is Casa de Oro-Mount Helix?
Since January in Casa de Oro-Mount Helix averages 55°F, Casa de Oro-Mount Helix's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Casa de Oro-Mount Helix?
Casa de Oro-Mount Helix'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 Casa de Oro-Mount Helix?
See this week's day-by-day rain chances for Casa de Oro-Mount Helix in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Casa de Oro-Mount Helix?
Current conditions for Casa de Oro-Mount Helix and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Casa de Oro-Mount Helix forecast updated?
The Casa de Oro-Mount Helix forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Casa de Oro-Mount Helix?
Today's sunrise and sunset times for Casa de Oro-Mount Helix 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 Casa de Oro-Mount Helix?
The next few days in Casa de Oro-Mount Helix's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

The hot-summer Mediterranean climate of Casa de Oro-Mount Helix, California carries typical Januarys near 55°F and Julys around 73°F — 18°F of seasonal travel.

In a typical year Casa de Oro-Mount Helix records about 11 inches of precipitation on around 94 days.

From 32.8°N, Casa de Oro-Mount Helix sees a 18°F seasonal swing that governs Casa de Oro-Mount Helix's planting and frost windows.

All cities in California →

El Cajon, CA weather →

ZIP codes in Casa de Oro-Mount Helix

  • 91977
  • 91941
  • 92020
  • 91976

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.