When to plant in Mountain View, CA
USDA Zone 9bEverything below — frost dates, hardiness zone, and what to plant when in Mountain View, California — is derived from the closest NOAA station with complete climate normals.
Mountain View enjoys a long ~351-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. In zone 9b, frost is a minor factor for Mountain View — most perennials thrive, and annual vegetables can go out early and stay late.
The average first fall frost in Mountain View is now 7 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
MOFFETT FEDERAL AIRFIELD · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Mountain View’s own odds, recorded at MOFFETT FEDERAL AIRFIELD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 6 | Feb 6 | Jan 3 | Nov 20 | Dec 6 | Dec 30 |
| 32°F | Feb 4 | Jan 6 | Dec 16 | Dec 3 | Dec 23 | Jan 16 |
| 28°F | Jan 22 | Jan 1 | Dec 16 | Dec 13 | Dec 31 | Jan 22 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Mountain View, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Mountain View planting FAQ
When is the last spring frost in Mountain View, CA?
Plan for the last spring frost in Mountain View around January 6 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Mountain View, CA?
The first fall frost in Mountain View typically arrives around December 23 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Mountain View in?
Mountain View is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Mountain View?
Mountain View has about 351 frost-free days — a long growing season — between the average last spring frost (January 6) and first fall frost (December 23).
When should I plant tomatoes in Mountain View?
For Mountain View, sow tomatoes indoors about November 11–November 25 and move the seedlings out around January 13, after the last spring frost.
Never miss a window in Mountain View
An email when it’s time to start seeds, transplant, and sow — timed to Mountain View’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Los Altos · 4 km
- Sunnyvale · 5 km
- Palo Alto · 6 km
- Stanford · 8 km
- East Palo Alto · 9 km
- Cupertino · 9 km
- Santa Clara · 11 km
- Menlo Park · 11 km
Frost dates recorded at MOFFETT FEDERAL AIRFIELD, 3 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Mountain View, CA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00023244. Retrieved from https://blissgarden.com/california/mountain-view.