Irvine (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Irvine.
Climate overview of Irvine
Temperatures in Irvine, California, United States of America, shift moderately through the seasons. The warmest month is September at 29°C (84°F), and the coolest is December at 20°C (68°F).
The area sees almost no rainfall, totalling just 218 mm (8.6 in) per year. July is the sunniest month, averaging 12.3 hours of sunshine per day.
Irvine Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Irvine - and find the best time to visit.
Monthly Temperature in Irvine
The climate in Irvine experiences moderate temperature changes, with mild shifts between seasons. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in September to a pleasant 20°C (68°F) in the coolest month, December.
Nights vary from 18°C (64°F) in September to around 8°C (46°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Irvine
Irvine is known for its low rainfall, with yearly precipitation amounts around 218 mm (8.6 in). The climate in Irvine shows significant variation throughout the year. Expect moderate rainfall in December, the wettest month, with an average of 58 mm (2.3 in) of precipitation over 8 rainy days.
In contrast, the driest month August offers drier and sunnier days, with around 0.2 mm (0.01 in) of rainfall over 0 rainy days. For more details, please visit our Irvine 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 Irvine
For those who appreciate different seasons, Irvine serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 12.3 hours of sunshine daily, and embrace the darker days in January, offering only 6.6 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Irvine
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Warmest weather: July, August and September
- Most sunshine: July and August
- Fewest rainy days: June, July, August and September
- Seasonal pattern: A distinct dry season from February to November
Frequently asked questions about the climate in Irvine
What is the best time to visit Irvine?
Irvine has a distinct dry season from February to November.
What temperatures can I expect in Irvine?
Daytime highs range from 20°C (68°F) in December to 29°C (84°F) in September. Nighttime lows range from 8°C (46°F) to 18°C (64°F).
How much rain does Irvine get?
Annual rainfall is around 218 mm (8.6 in). December is the wettest month with 58 mm (2.3 in), while August is the driest with 0.2 mm (0.01 in).
How sunny is Irvine?
Irvine receives around 3,279 hours of sunshine per year. July is the sunniest month with 369 hours, while January is the cloudiest with just 198 hours. Overall, Irvine enjoys abundant sunshine.
Irvine 3-Day Forecast
Irvine (CA) 3-Day Forecast
Irvine on the map
Irvine is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.