Pleasanton, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pleasanton, a city in Alameda County, California.
This Afternoon
81°F
Sunny
Sunny, with a high near 81. West wind around 8 mph, with gusts as high as 18 mph.
7-day forecast for Pleasanton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Sunny | 8 mph W | 0% |
| Tonight | 56°F | Mostly Clear | 1 to 6 mph WSW | 0% |
| Saturday | 86°F | Sunny | 0 to 7 mph W | 0% |
| Saturday Night | 57°F | Partly Cloudy | 1 to 5 mph WSW | 0% |
| Sunday | 77°F | Partly Sunny | 1 to 7 mph WSW | 3% |
| Sunday Night | 56°F | Mostly Cloudy | 1 to 7 mph WSW | 3% |
| Monday | 80°F | Mostly Sunny | 1 to 7 mph WSW | 0% |
| Monday Night | 56°F | Mostly Clear | 0 to 7 mph SW | 0% |
| Tuesday | 85°F | Sunny | 0 to 7 mph WSW | 0% |
| Tuesday Night | 58°F | Mostly Clear | 0 to 7 mph W | 0% |
| Wednesday | 95°F | Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 63°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Thursday | 95°F | Sunny | 0 to 7 mph NW | 0% |
| Thursday Night | 62°F | Mostly Clear | 0 to 7 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Pleasanton (37.667, -121.881). Updated through the day.
Growing snapshot for Pleasanton
Last spring frost
Feb 15
First fall frost
Dec 2
Growing season
292 days
Hardiness zone
9b
More local growing data for Pleasanton: nearby ZIP 94566 weather · frost dates · planting calendar · California frost dates
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Union City
Climate data from the nearest NOAA station, Livermore, Ca (3.6 mi from Pleasanton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.