Imperial Beach (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Imperial Beach.
Climate overview of Imperial Beach
Imperial Beach, California, United States of America, has a stable climate with little temperature variation across the year. Average daytime temperatures hover around 22°C (72°F), peaking in September at 25°C (77°F) and dipping in December to 19°C (66°F).
With just 202 mm (8 in) of annual rainfall, the city has a dry, desert-like climate. The sunniest month is July, with 10.4 hours of sunshine per day on average.
Imperial Beach Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Imperial Beach - and find the best time to visit.
Monthly Temperature in Imperial Beach
With minimal seasonal shifts, Imperial Beach experiences a constant climate year-round. Average daytime temperatures reach a comfortable 25°C (77°F) in September. In December, the coolest month of the year, temperatures drop to a pleasant 19°C (66°F).
At night, temperatures range from around 18°C (64°F) in September to 8°C (46°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Imperial Beach
Imperial Beach is known for its low rainfall, with yearly precipitation amounts around 202 mm (8 in). Imperial Beach can be quite wet during December, receiving approximately 53 mm (2.1 in) of precipitation over 7 rainy days.
In contrast, during the driest month (June), you will experience much drier conditions, with 0.2 mm (0.01 in) of precipitation spread across 0 rainy days. For more details, please visit our Imperial Beach Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Imperial Beach
Imperial Beach experiences moderate variation in sunshine hours across the seasons. With 10.4 hours daily sunshine in July, it dips to 7.3 hours in January, offering a balanced mix of sunny and overcast days.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Imperial Beach by Month
The relative humidity is high throughout the year in Imperial Beach.
The city experiences its highest humidity in July, reaching 80%. In November, the humidity drops to its lowest level at 69%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Imperial Beach
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, April, May, June, July, August, September, October and November
- Warmest weather: July, August, September and October
- Most sunshine: July
- Fewer rainy days: May, June, July, August and September
- Seasonal pattern: Very little rainfall for most of the year
Frequently asked questions about the climate in Imperial Beach
What is the best time to visit Imperial Beach?
January, February, March, April, May, June, July, August, September, October and November typically offer the most optimal weather in Imperial Beach. In contrast, December tends to have less optimal conditions. Imperial Beach has very little rainfall for most of the year.
What temperatures can I expect in Imperial Beach?
Daytime highs range from 19°C (66°F) in December to 25°C (77°F) in September. Nighttime lows range from 8°C (46°F) to 18°C (64°F). Temperatures stay relatively stable year-round.
How much rain does Imperial Beach get?
Annual rainfall is around 202 mm (8 in). December is the wettest month with 53 mm (2.1 in), while June is the driest with 0.2 mm (0.01 in).
How sunny is Imperial Beach?
Imperial Beach receives around 3,037 hours of sunshine per year. July is the sunniest month with 312 hours, while January is the cloudiest with just 219 hours. Overall, Imperial Beach enjoys abundant sunshine.
Imperial Beach 3-Day Forecast
Imperial Beach (CA) 3-Day Forecast
Imperial Beach on the map
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