Santa Clara, California Weather
California lilac blooms in winter light. Day 50 of autumn. Read this microseason across nine climate regions →
Santa Clara weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 11:11 AM PST · Open-Meteo
- TodayNov 10Clear——74°49°—
- WednesdayNov 11Foggy——68°54°-6°
- ThursdayNov 12Foggy——77°55°+9°
- FridayNov 13Showers74%0.36″66°56°-11°
- SaturdayNov 14Drizzle42%—62°54°-4°
- SundayNov 15Overcast51%—68°52°+6°
- MondayNov 16Showers44%0.92″57°52°-11°
Air quality now AQI 61 · Moderate
AQI 61 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 6.4 µg/m³ (AQI 36) with a 0.94 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant air, not road dust.
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 32 now. With UV 3.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 17.
- Present
- AQI 32
- UV peak
- 3.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 17
PM × Wind × Precip
PM2.5 at 6.4 µg/m³ (AQI 36) with a 0.94 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.94
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
When the wind is in the west, the weather is at its best.
- Moonrise
- 8:24 AM
- Moonset
- 5:07 PM
- In sign
- ♐︎ Sagittarius
California lilac blooms in winter light
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Santa Clara at a glance
- Today vs. normal: Today averages 62°F (high 74°F, low 49°F), 5°F above the 57°F normal for Nov 10
- Last frost: January 12 (1991–2020 median, NOAA station 4 km away)
- Microseason: Nov 6–10
- Planting calendar: November — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Santa Clara
- Tue74°49°0%
- Wed68°54°0%
- Thu77°55°9%
- Fri66°56°74%
- Sat62°54°42%
- Sun68°52°51%
- Mon57°52°44%
- Tue62°53°28%
- Wed56°51°59%
- Thu56°48°50%
- Fri59°48°14%
- Sat60°46°8%
- Sun60°46°19%
- Mon61°47°27%
- Tue57°52°13%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Santa Clara
Interactive wind and temperature map centered on Santa Clara — it loads in your browser. Open the full weather map.
Right now in the garden
Fall planting + final harvests
As of November 10, the season's first frost (typically December 22) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for November: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Santa Clara
Santa Clara sits in Santa Clara County, where the year’s longest day runs 14h 44m of daylight and its shortest just 9h 35m — a swing of +5h 9m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Los Angeles, the state’s largest city, lies about 300 miles to the SE. The nearest town Santa Clara tracks is Sunnyvale, roughly 3 miles to the WNW.
Air quality in Santa Clara
Air quality in Santa Clara’s county has trended cleaner since 2020; its cleanest year on record was 2023 (median AQI 43). See the full air-quality history for Santa Clara.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | spinach, radishes, fall brassicas, carrots |
| February | — | lettuce, peas, spinach, radishes |
| March | — | lettuce, peas, spinach |
| April | tomatoes, peppers, beans, squash | lettuce, peas |
| May | tomatoes, peppers, beans, squash | garlic |
| June | beans, squash | beans, summer squash |
| July | beans, squash | tomatoes, peppers, beans, summer squash |
| August | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| September | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| October | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| November | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes, garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
A year in weather
August is Santa Clara's warmest stretch (~70°F) and December its coldest (~51°F); precipitation crests in January at 2.8 inches and ebbs in July to 0.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 51° | 2.8″ | 9 |
| February | 53° | 2.7″ | 10 |
| March | 56° | 2.1″ | 9 |
| April | 59° | 1.1″ | 6 |
| May | 63° | 0.4″ | 3 |
| June | 67° | 0.2″ | 1 |
| July | 70° | 0.0″ | 0 |
| August | 70° | 0.1″ | 0 |
| September | 69° | 0.1″ | 1 |
| October | 64° | 0.5″ | 3 |
| November | 56° | 1.3″ | 7 |
| December | 51° | 2.3″ | 10 |
Regional context
Similar climates Sunnyvale, CA, Fruitdale, CA, Cupertino, CA
Santa Clara swings from 51°F in January to 70°F in July (19°F) per NOAA NCEI 1991-2020 normals; precipitation in Santa Clara runs about 13.5 inches on roughly 59 measurable days.
Santa Clara's moisture rides winter storm tracks: January brings 2.8 inches over 9.2 wet days, while July sees only 0.0 inches across 0.1 days in the dry warm season. It is a winter-storm rhythm Santa Clara shares with places like Sunnyvale, CA, Fruitdale, CA and Cupertino, CA.
Santa Clara reaches its last hard frost near January 12; that is the cue for lettuce, chard, arugula, and mustard greens. Tomatoes and peppers do best set out two weeks later in Santa Clara, once nights clear the mid-40s°F. By December 22, frost is back in Santa Clara — protect or harvest anything tender. That date is a median: Santa Clara freezes sooner in half of years.
Similar climates: Sunnyvale, CA, Fruitdale, CA, Cupertino, CA, Campbell, CA, Milpitas, CA.
Frequently asked
- When does it freeze in Santa Clara?
- Frost typically leaves Santa Clara by January 12 and returns to Santa Clara near December 22.
- What is the rainy season in Santa Clara?
- Rainfall in Santa Clara peaks in January near 2.8 inches, out of about 13 inches annually.
- What is the warmest month in Santa Clara?
- The warmest stretch in Santa Clara comes in August, around 70°F on average.
- What is the coldest month in Santa Clara?
- On average December is the chilliest month in Santa Clara, about 51°F.
- When can I start a vegetable garden in Santa Clara?
- Frost-hardy sowings begin at January 12 in Santa Clara; warm-season starts follow two weeks on.
- How many rainy days does Santa Clara get?
- Expect roughly 59 wet days a year in Santa Clara.
- What hardiness zone is Santa Clara?
- Santa Clara's hardiness zone tracks its winter low; with December near 51°F, check the USDA ZIP map for the exact zone.
- What is the 10-day forecast for Santa Clara?
- Santa Clara'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 Santa Clara?
- See this week's day-by-day rain chances for Santa Clara in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Santa Clara?
- Current conditions for Santa Clara and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Santa Clara forecast updated?
- The Santa Clara forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Santa Clara?
- Today's sunrise and sunset times for Santa Clara 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 Santa Clara?
- The next few days in Santa Clara's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Santa Clara sits at 37.4°N; its climate zone is hot-summer Mediterranean (Köppen approximation).
ZIP codes in Santa Clara
- 95050
- 95051
- 95052
- 95053
- 95054
- 95055
- 95056