Signal Hill, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Signal Hill, a city in Los Angeles County, California.

Overnight

65°F

Patchy Fog

Patchy fog after 5am. Mostly cloudy, with a low around 65. Southeast wind around 5 mph.

7-day forecast for Signal Hill

When	Temp	Forecast	Wind	Precip
Overnight	65°F	Patchy Fog	5 mph SE	0%
Saturday	83°F	Patchy Fog then Partly Sunny	5 to 10 mph SSW	0%
Saturday Night	66°F	Patchy Fog	5 mph SSW	0%
Sunday	81°F	Patchy Fog then Partly Sunny	5 to 10 mph SSW	1%
Sunday Night	66°F	Patchy Fog	5 mph S	1%
Monday	75°F	Mostly Sunny	5 to 10 mph SSW	1%
Monday Night	66°F	Patchy Fog	0 to 10 mph SSW	0%
Tuesday	77°F	Patchy Fog then Mostly Sunny	0 to 10 mph SSW	0%
Tuesday Night	66°F	Partly Cloudy then Patchy Fog	0 to 10 mph WSW	0%
Wednesday	81°F	Patchy Fog then Mostly Sunny	0 to 10 mph WSW	0%
Wednesday Night	68°F	Mostly Clear	0 to 10 mph SW	0%
Thursday	83°F	Mostly Sunny	0 to 10 mph SW	2%
Thursday Night	68°F	Partly Cloudy	0 to 10 mph SW	2%
Friday	84°F	Mostly Sunny	0 to 10 mph SW	1%

Forecast source: National Weather Service (api.weather.gov) for Signal Hill (33.803, -118.170). Updated through the day.

Growing snapshot for Signal Hill

Growing season

365 days

Hardiness zone

10b

More local growing data for Signal Hill: nearby ZIP 90755 weather · frost dates · planting calendar · California frost dates

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Acton Agoura Hills Agua Dulce Alhambra Alondra Park Altadena Arcadia Artesia Avalon Avocado Heights Azusa Baldwin Park Bell Bell Canyon Bell Gardens Bellflower Beverly Hills Bradbury Burbank Calabasas Carson Castaic Cerritos Charter Oak Citrus Claremont Commerce Compton Covina Cudahy

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Climate data from the nearest NOAA station, Long Beach Daugherty Fld, Ca (1.3 mi from Signal Hill). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.