Photo: JaGa · CC BY-SA 3.0Less rain and snow falls on Santa Clara than on 92% of U.S. towns: 16 inches a year
Midsummer highs settle at about 82°. By January nights alone, it runs milder than 89% of U.S. towns. June has warmed most since 1901–2000, part of a 1.9° rise. Central heating does most of its work from December, in months below 50° on average.
A year in Santa Clara at a glance
Each month’s typical high and low, and what it brings.
What stands out about Santa Clara’s climate
Compared with towns across the U.S., with Santa Clara’s place in California beside it.
What a year in Santa Clara feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A freeze most winters
Frost and day counts come from NOAA’s station at Moffett Federal Airfield, CA, 5 miles from the city’s center point, at about the same height.
The 2023 USDA map puts Santa Clara’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 30°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 16 inches of rain a year
February is the wettest month and July the driest. Rain falls on about 64 days a year. Snow is rare: about 0.0" in a normal year at San Jose, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Santa Clara
84% of the work is heating. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Moffett Federal Airfield, CA.
Living with Santa Clara’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 9b. Frost comes about 7 winters in 10, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: February, March, April, May, June, July, August, September, October and November. 7.7 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Santa Clara from natural hazards, earthquakes are the largest share (56%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Santa Clara and its neighbors
San Jose has the coldest January nights next door (39°, 1° colder) and San Jose the hottest July afternoons (86°, 3° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Santa Clara’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Santa Clara, CA | 40° | 82° | 16" | 0.0" |
| Green, OR | 37° | 86° | 32" | 0.0" |
| Alpine, TX | 30° | 90° | 15" | 2.2" |
| Sierra Vista Southeast, AZ | 32° | 91° | 15" | 0.7" |
| Makawao, HI | 53° | 75° | 23" | 0.0" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Santa Clara averaged 1.9° warmer than the 1900s. The biggest change is in June (+2.3°).
A bigger shift than in 83% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods. In a city of 133,000 people, part of the change is the city itself: pavement and buildings hold heat (the urban heat island).
How Santa Clara compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Santa Clara’s place among California’s.
Santa Clara weather by month
Highs, lows and precipitation from NOAA’s grid at Santa Clara’s center; snow, wet days and snow on the ground from San Jose, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 60° | 40° | 3.0" | 0.0" | 10 | 0 | 47° – 54° |
| February | 63° | 43° | 3.3" | 0.0" | 12 | 0 | 48° – 57° |
| March | 67° | 44° | 2.5" | 0.0" | 9 | 0 | 51° – 61° |
| April | 70° | 46° | 1.2" | 0.0" | 6 | 0 | 54° – 62° |
| May | 75° | 50° | 0.5" | 0.0" | 4 | 0 | 58° – 67° |
| June | 80° | 53° | 0.1" | 0.0" | 1 | 0 | 63° – 69° |
| July | 82° | 56° | 0.0" | 0.0" | 0 | 0 | 67° – 72° |
| August | 82° | 56° | 0.0" | 0.0" | 0 | 0 | 66° – 73° |
| September | 82° | 54° | 0.1" | 0.0" | 1 | 0 | 65° – 72° |
| October | 77° | 50° | 0.7" | 0.0" | 3 | 0 | 60° – 69° |
| November | 66° | 44° | 1.6" | 0.0" | 7 | 0 | 49° – 59° |
| December | 59° | 40° | 2.9" | 0.0" | 11 | 0 | 46° – 55° |
| Year | 72° | 48° | 15.8" | 0.0" | 64 | 0 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 51° to 61°. July is the most reliable, staying within 6°.
Where Santa Clara’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Santa Clara’s center.
- Snow: San Jose, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Moffett Federal Airfield, CA, 5 miles from the city’s center point, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Santa Clara’s climate
What is the weather like in Santa Clara?
A typical July afternoon reaches 82°, a January night drops to 40°, and snow is almost unheard of. Milder January nights than 89% of U.S. towns; cooler July afternoons than 78% of U.S. towns.
How cold does it get in Santa Clara in winter?
December nights average 40°. About 2 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 46°.
How much snow does Santa Clara get?
About 0.0 inches in a normal winter at San Jose, CA, so most winters see none.
How hot does it get in Santa Clara?
July, with a typical high of 82° and a low of 56°. About 9 days a year reach 90° (Moffett Federal Airfield, CA).
When is the first and last frost in Santa Clara?
There is no reliable frost date: a 32° night comes in about 70% of winters at Moffett Federal Airfield, CA, so most years bring a freeze but some pass without one.
What growing zone is Santa Clara in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 30°.
What is the best time of year to visit Santa Clara?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March, April, May, June, July, August, September, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Santa Clara getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 83% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Santa Clara.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.