Quartz Hill, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Quartz Hill weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——90°72°—
- MondayJul 6Clear——92°72°+2°
- TuesdayJul 7Clear——95°64°+3°
- WednesdayJul 8Clear——101°64°+6°
- ThursdayJul 9Clear——101°66°0°
- FridayJul 10Partly Cloudy——98°66°-3°
- SaturdayJul 11Overcast——96°69°-2°
AQI 42 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 13.7 µg/m³, PM10 at 47.4 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.
What's driving it
Ozone × UV × Sky
Ozone at AQI 34 now. With UV 9.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 45 around 1 PM.
- Present
- AQI 34
- UV peak
- 9.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 45
PM × Wind × Precip
PM2.5 at 13.7 µg/m³, PM10 at 47.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.29
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:09 PM
- Moonset
- 11:11 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Quartz Hill at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: March 15 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Quartz Hill
- Sun90°72°1%
- Mon92°72°0%
- Tue95°64°0%
- Wed101°64°0%
- Thu101°66°0%
- Fri98°66°0%
- Sat96°69°0%
- Sun84°65°3%
- Mon100°65°7%
- Tue100°73°10%
- Wed101°72°8%
- Thu102°73°13%
- Fri104°74°16%
- Sat98°74°10%
- Sun103°73°16%
- Mon103°73°15%
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.
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
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
July is Quartz Hill's warmest stretch (~81°F) and December its coldest (~46°F); precipitation crests in February at 1.6 inches and ebbs in June to 0.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 47° | 1.4″ | 8 |
| February | 49° | 1.6″ | 8 |
| March | 52° | 1.3″ | 9 |
| April | 59° | 0.5″ | 5 |
| May | 68° | 0.1″ | 2 |
| June | 75° | 0.0″ | 0 |
| July | 81° | 0.1″ | 1 |
| August | 81° | 0.1″ | 1 |
| September | 75° | 0.1″ | 1 |
| October | 65° | 0.2″ | 2 |
| November | 54° | 0.6″ | 4 |
| December | 46° | 1.1″ | 7 |
Regional context
Per NOAA NCEI 1991-2020 normals, Quartz Hill runs from a 47°F January mean to 81°F in July, a 35°F seasonal spread, with near 7 inches of precipitation across about 48 wet days.
Precipitation in Quartz Hill peaks in the cool season: February averages 1.6 inches across 8.3 storm-fed days, while June bottoms out at 0.0 inches over just 0.4 rainy days. That groups Quartz Hill with places like Lancaster, CA, Leona Valley, CA and Desert View Highlands, CA on the same cool-season storm track.
Hard freezes are rare in Quartz Hill: the coldest month averages 46°F, so Quartz Hill's growing window runs most of the year. July is the hottest stretch near 81°F, pushing cool-season crops to the milder shoulder months. Within Quartz Hill, low or inland lots lose 3-5°F overnight versus Quartz Hill's coastal ground.
Similar climates: Lancaster, CA, Leona Valley, CA, Desert View Highlands, CA, Palmdale, CA, Elizabeth Lake, CA.
Frequently asked
- When does it freeze in Quartz Hill?
- Quartz Hill's last spring frost lands near mid-March, and in Quartz Hill the first fall frost follows around mid-December.
- What is the rainy season in Quartz Hill?
- Rainfall in Quartz Hill peaks in February near 1.6 inches, out of about 7 inches annually.
- What is the warmest month in Quartz Hill?
- The warmest stretch in Quartz Hill comes in July, around 81°F on average.
- What is the coldest month in Quartz Hill?
- On average December is the chilliest month in Quartz Hill, about 46°F.
- When can I start a vegetable garden in Quartz Hill?
- Quartz Hill's last frost (mid-March) cues hardy greens; in Quartz Hill, hold heat-lovers two weeks past.
- How many rainy days does Quartz Hill get?
- Expect roughly 48 wet days a year in Quartz Hill.
- What hardiness zone is Quartz Hill?
- Quartz Hill's USDA zone comes from its December mean (46°F); enter the ZIP on the USDA lookup for the number.
- What is the 10-day forecast for Quartz Hill?
- Quartz Hill'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 Quartz Hill?
- See this week's day-by-day rain chances for Quartz Hill in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Quartz Hill?
- Current conditions for Quartz Hill and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Quartz Hill forecast updated?
- The Quartz Hill forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Quartz Hill?
- Today's sunrise and sunset times for Quartz Hill 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 Quartz Hill?
- The next few days in Quartz Hill's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Quartz Hill, California has a hot-summer Mediterranean climate: January averages roughly 47°F, July about 81°F, 34°F between them.
Yearly precipitation in Quartz Hill totals around 7 inches, spread over about 48 days of rain or snow.
At 34.7°N, Quartz Hill's 34°F summer-to-winter swing sets when Quartz Hill's gardens wake and when frost returns.
ZIP codes in Quartz Hill
- 93536
- 93586