Santa Clara County Weather Forecast
Santa Clara County weather: 60°F, clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Santa Clara County weather in September
Weather map for Santa Clara County
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Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
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 | 85° | 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).
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.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
How Santa Clara County compares with nearby places
Annual averages, and the difference against Santa Clara County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| San Francisco International Airport | 30 mi | 58°F | 36°F cooler | 24 in |
| Mission District | 38 mi | 57°F | 36°F cooler | 25 in |
| Area Code 415 | 39 mi | 57°F | 36°F cooler | 25 in |
| San Francisco County | 39 mi | 57°F | 36°F cooler | 25 in |
| San Francisco | 39 mi | 57°F | 36°F cooler | 25 in |
See the Santa Clara County forecast by time range
Santa Clara County weather - more answers
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 (15°C) with clear. Humidity is 89% and wind is 3 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 1:08 AM.
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 August 22, 2026 at 1:08 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
