Fallbrook Weather in May

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

The climate in Fallbrook during May can be summarized as mild and very dry.

May is in the spring in Fallbrook and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a comfortable 23°C (73°F), whilst at night 12°C (53°F) is normal.

Fallbrook weather averages (imperial / metric)
Daytime temperature 23°C 73.3°F
Nightly temperature 11.7°C 53°F
Average temperature 17.3°C 63.1°F
Daily sunshine 9.5 hrs
Avg rainfall 9 mm 0.3 ins
Rainy days 2 days
Sea temperature 16.6°C 61.8°F
Humidity 64%
Windspeed 14.8kph 9 mph

On average May is the 6th driest month of the year in Fallbrook with around 9mm 0.3 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 9.5 hours of sunshine per day.

May temperatures in Fallbrook

Fallbrook average temperature in May

May rainfall

Fallbrook average rain in May

May hourly sunshine

Fallbrook average rain in May

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 May 2025.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Fallbrook weather stats

Fallbrook weather statistics
Hottest month: August 29.4°C 84.9°F
Driest month: July 2mm 0.1ins
Sunniest month: August 11.1hrs
Coldest month: January 17.7°C 63.9°F
Wettest month: January 70mm 2.8ins
Map showing location of Fallbrook (33.37642, -117.25115) Fallbrook map pin © Google

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