McSwain, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McSwain, a community in Merced County, California.
Tonight
47°F
Partly Cloudy
Partly cloudy. Low around 47, with temperatures rising to around 49 overnight. North northwest wind 0 to 10 mph, with gusts as high as 20 mph.
7-day forecast for McSwain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Partly Cloudy | 0 to 10 mph NNW | 9% |
| Wednesday | 69°F | Sunny | 5 to 10 mph NW | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Thursday | 71°F | Mostly Sunny | 0 to 10 mph NNW | 0% |
| Thursday Night | 45°F | Mostly Clear | 0 to 5 mph N | 0% |
| Friday | 73°F | Sunny | 0 to 5 mph NNW | 0% |
| Friday Night | 47°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 75°F | Sunny | 0 to 5 mph SE | 0% |
| Saturday Night | 48°F | Mostly Clear | 0 mph | 0% |
| Sunday | 76°F | Sunny | 0 to 5 mph NW | 0% |
| Sunday Night | 49°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Monday | 75°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Monday Night | 49°F | Partly Cloudy | 0 to 5 mph NW | 1% |
| Tuesday | 74°F | Sunny | 0 mph | 3% |
Forecast source: National Weather Service (api.weather.gov) for McSwain (37.315, -120.587). Updated through the day.
Growing snapshot for McSwain
Last spring frost
Mar 3
First fall frost
Nov 24
Growing season
263 days
Hardiness zone
9a
More local growing data for McSwain: nearby ZIP 95301 weather · frost dates · planting calendar · California frost dates
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University of California-Merced
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Climate data from the nearest NOAA station, Merced, Ca (7.8 mi from McSwain). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.