Fallbrook Weather in March

What's the weather like in Fallbrook (California) in March 2026?

The climate in Fallbrook during March can be summarized as mild and reasonably dry.

March is in the spring in Fallbrook and is typically the 4th coldest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 7°C (45°F) is normal.

Fallbrook weather averages (imperial / metric)
Daytime temperature 18.9°C 65.9°F
Nightly temperature 7.2°C 44.9°F
Average temperature 13°C 55.4°F
Daily sunshine 9.2 hrs
Avg rainfall 60 mm 2.3 ins
Rainy days 6 days
Sea temperature 15.1°C 59.3°F
Humidity 63%
Windspeed 14kph 9 mph

On average March is the 3rd wettest month of the year in Fallbrook with around 60mm 2.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.2 hours of sunshine per day.

March temperatures in Fallbrook

Fallbrook average temperature in March

March rainfall

Fallbrook average rain in March

March hourly sunshine

Fallbrook average rain in March

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Fallbrook in March 2025.