Suisun City, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Suisun City, a city in Solano County, California.
Today
70°F
Sunny
Sunny. High near 70, with temperatures falling to around 66 in the afternoon. Northwest wind around 7 mph.
7-day forecast for Suisun City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Sunny | 7 mph NW | 2% |
| Tonight | 48°F | Mostly Cloudy | 1 to 5 mph W | 2% |
| Thursday | 73°F | Patchy Fog then Mostly Sunny | 1 to 5 mph NW | 0% |
| Thursday Night | 48°F | Mostly Clear | 0 to 3 mph WNW | 0% |
| Friday | 72°F | Sunny | 0 to 3 mph NE | 0% |
| Friday Night | 48°F | Mostly Clear | 2 mph W | 0% |
| Saturday | 72°F | Sunny | 0 to 7 mph NE | 0% |
| Saturday Night | 50°F | Mostly Clear | 2 mph NE | 0% |
| Sunday | 73°F | Sunny | 0 to 3 mph NNE | 0% |
| Sunday Night | 50°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 72°F | Mostly Sunny | 0 to 3 mph WSW | 1% |
| Monday Night | 50°F | Partly Cloudy | 0 to 3 mph NW | 2% |
| Tuesday | 72°F | Sunny | 0 to 3 mph NW | 5% |
| Tuesday Night | 51°F | Mostly Clear | 3 mph WSW | 11% |
Forecast source: National Weather Service (api.weather.gov) for Suisun City (38.248, -122.010). Updated through the day.
Growing snapshot for Suisun City
Last spring frost
Jan 15
First fall frost
Dec 14
Growing season
336 days
Hardiness zone
9b
More local growing data for Suisun City: nearby ZIP 94533 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Fairfield, Ca (3.4 mi from Suisun City). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.