Santa Clara County Weather Forecast
Santa Clara County weather: 60°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
Santa Clara County is a county in California. Santa Clara County is a county in the United States. It has a population of about 1.9 million.
Right now it is 60°F (16°C) in Santa Clara County with overcast. It feels like 60°F. Today runs from 56°F to 67°F. Chance of precipitation is 1%. Sightseeing conditions score 9.8/10 - excellent - go now.
The best time to visit Santa Clara County is May, June, July, August, September and October. The climate is Mediterranean. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 84°F, while January is the coldest with lows near 43°F.
The closest major airport is San Francisco International Airport (SFO), about 30 mi away. Nearby highlights include Alcatraz Island, Golden Gate Bridge, Point Lobos State Natural Reserve and Pinnacles National Park.
In plain terms. Today is much colder than average for September. The forecast high of 67°F is 15.8°F below the 83°F typical for this month. The best window to be outside is roughly 12 PM to 3 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in Santa Clara County today at 9.8/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Weather in Santa Clara County right now
Source: Open-Meteo. Updated 8:30 PM, Sep 20 local time.
See the Santa Clara County forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for Santa Clara County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Sun, Sep 20 | ☁️ Overcast | 67° / 56° | 1% | 8 mph | 6 |
| Mon, Sep 21 | ☁️ Overcast | 73° / 56° | 1% | 12 mph | 6 |
| Tue, Sep 22 | ⛅ Partly cloudy | 79° / 53° | 1% | 10 mph | 6 |
| Wed, Sep 23 | ☀️ Clear sky | 87° / 61° | 0% | 10 mph | 6 |
| Thu, Sep 24 | ☁️ Overcast | 88° / 64° | 0% | 12 mph | 6 |
| Fri, Sep 25 | ☀️ Clear sky | 83° / 63° | 1% | 9 mph | 6 |
| Sat, Sep 26 | ☁️ Overcast | 85° / 62° | 0% | 11 mph | 6 |
| Sun, Sep 27 | ☁️ Overcast | 80° / 61° | 1% | 9 mph | 6 |
| Mon, Sep 28 | ☀️ Clear sky | 86° / 61° | 1% | 6 mph | 6 |
| Tue, Sep 29 | ☁️ Overcast | 92° / 69° | 2% | 6 mph | 6 |
| Wed, Sep 30 | ☁️ Overcast | 96° / 73° | 6% | 8 mph | 6 |
| Thu, Oct 1 | ☁️ Overcast | 75° / 66° | 2% | 8 mph | 1 |
| Fri, Oct 2 | ☁️ Overcast | 79° / 65° | 3% | 9 mph | 6 |
| Sat, Oct 3 | ☀️ Clear sky | 85° / 62° | 3% | 7 mph | 6 |
| Sun, Oct 4 | ⛅ Partly cloudy | 85° / 64° | 3% | 8 mph | 6 |
| Mon, Oct 5 | 🌥️ Fog | 78° / 58° | 0% | 10 mph | 6 |
Climate in Santa Clara County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 60° | 43° | 2,9 in | ★★★☆☆ |
| February | 62° | 45° | 5,7 in | ★★★☆☆ |
| March | 68° | 48° | 2,5 in | ★★★★☆ |
| April | 70° | 50° | 1,8 in | ★★★★☆ |
| May | 77° | 54° | 0,5 in | ★★★★★ |
| June | 83° | 57° | 0,0 in | ★★★★★ |
| July | 84° | 59° | 0,0 in | ★★★★★ |
| August | 84° | 60° | 0,0 in | ★★★★★ |
| September | 83° | 59° | 0,1 in | ★★★★★ |
| October | 78° | 56° | 0,6 in | ★★★★★ |
| November | 66° | 48° | 3,2 in | ★★★★☆ |
| December | 60° | 46° | 4,6 in | ★★★☆☆ |
Climate type: Mediterranean. Source: Open-Meteo archive (ERA5).
Weather map for Santa Clara County
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in Santa Clara County
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit Santa Clara County
Go in May, June, July, August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
Explore Santa Clara County
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Santa Clara County?
Santa Clara County is a county in California. Its coordinates are 37.3541, -121.9552. It lies in North America.
What is the weather like in Santa Clara County right now?
It is currently 60°F (16°C) with overcast. Humidity is 85% and wind is 4 mph.
When is the best time to visit Santa Clara County?
May, June, July, August, September and October offer the most comfortable conditions in Santa Clara County, which has a Mediterranean climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Santa Clara County in?
Santa Clara County observes America/Los_Angeles (UTC-07:00). The local time is 8:30 PM.
How many people live in Santa Clara County?
Santa Clara County has a population of approximately 1.9 million.
What is the nearest airport to Santa Clara County?
The closest airports are San Francisco International Airport (SFO), 30 mi away and Los Angeles International Airport (LAX), 309 mi away.
What are the top things to do in Santa Clara County?
Popular options include Alcatraz Island, Golden Gate Bridge, Point Lobos State Natural Reserve, Pinnacles National Park, Julia Pfeiffer Burns State Park and Half Dome.
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| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated September 20, 2026 at 8:30 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
