April to May and September to October. Month by month below, with the weather, what's on and what it costs to fly there from your city.
Spring (April to May) and fall (September to October) are the most named; for Southern California sources also favor September.
4 of the 4 travel guides we read name these months.
Average high and low in Los Angeles, and days with rain
JanuaryChecking fares…Cheapest month for flights into San Diego, per one source.January and February are the wettest months in Southern California.Rain in LA is rare but usually falls in January and February.Rose Parade · Rose Bowl Game
FebruaryChecking fares…January and February are the wettest months in Southern California.BNP Paribas Open · Yosemite Firefall
MarchChecking fares…Spring Break brings crowds to many parts of the state.The Flower Fields at Carlsbad Ranch · Indian Wells Arts Festival
Best timeAprilChecking fares…Spring (April to May) is among the most pleasant times for weather.Coachella Valley Music and Arts Festival
Best timeMayChecking fares…Daytime temperature around 68F in the San Diego area.Yosemite waterfalls at peak snowmelt · The Napa Table
JuneChecking fares…Summer crowds arrive; June Gloom fog can linger into August on parts of the coast.Around 70F during the day in Southern California.San Francisco Pride Parade · Disneyland After Dark: Pride Nite
JulyChecking fares…Summer is the high season and the most expensive time to visit.San Francisco and Monterey rarely go much above 20C in July and August.San Diego Comic-Con · Festival Napa Valley
AugustChecking fares…August is the hottest month in Southern California.D23 Expo · Monterey Car Week
Best timeSeptemberChecking fares…Crowds begin thinning out as kids return to school.September is described as warm, with far fewer people at beaches.In LA it is often warmer in September than June.Monterey Jazz Festival · Laver Cup
Best timeOctoberChecking fares…Warm season in Southern California runs July to October.Fall is ideal for coastal hikes such as Big Sur.Downtown Día de los Muertos at Grand Park
NovemberChecking fares…Best deals often in November and early December, though rain can be prevalent in places like San Francisco.Thanksgiving is one of the most expensive times to travel.Monarch butterflies at Pacific Grove · Disney Festival of Holidays
DecemberChecking fares…Winter is prime surfing season in central California from December to February.Flight and hotel prices spike around the holidays.Elephant seal pupping at Piedras Blancas · Balboa Park December NightsWeather: Los Angeles averages from NOAA (1961 to 1990 averages), as listed in its climate table on Wikipedia.
Live fares from your airport. Watch them and we alert you when they drop.
Festivals and seasons through the year
Rose Parade
Rose Bowl Game
Lunar New Year at Disney California Adventure
San Diego Tet Festival
BNP Paribas Open
Yosemite Firefall
Super Bowl LXI
The Flower Fields at Carlsbad Ranch
Indian Wells Arts Festival
San Diego Crew Classic
Coachella Valley Music and Arts Festival
Yosemite waterfalls at peak snowmelt
The Napa Table
San Francisco Pride Parade
Disneyland After Dark: Pride Nite
San Diego County Fair
San Diego Comic-Con
Festival Napa Valley
D23 Expo
Monterey Car Week
Halloween Time at Disneyland Resort
Splash House
Monterey Jazz Festival
Laver Cup
Miramar Air Show
Downtown Día de los Muertos at Grand Park
Monarch butterflies at Pacific Grove
Disney Festival of Holidays
Cathedral City Hot Air Balloon Festival
Props and Hops Craft Beer Festival
Elephant seal pupping at Piedras Blancas
Balboa Park December Nights
Cancún
The Grand Canyon
Disneyland
Miami
Myrtle Beach
Prague
Bali
Maui
Montreal
Venice
Aruba
New Orleans
Nashville
Disney World
New York
Rome
San Diego
Phuket
Boston
Dubai
Seoul
Florida
Lisbon
Los Angeles
Chicago
Paris
Las Vegas
San Francisco
Edinburgh
Napa
Sydney
Hawaii
Scotland
Punta Cana
Savannah
Washington, DC
Mexico City
Zion National Park
Turks and Caicos
Puerto Vallarta
Honolulu
Banff
Yosemite
Tulum
The Bahamas
Sedona
Seattle
Santorini
Buenos Aires
London
Charleston
Rio de Janeiro
Palm Springs
Yellowstone
Amsterdam
Toronto
Key West
Orlando
Europe
Austin
Machu Picchu
Cabo San Lucas
Niagara Falls
Colorado
Oregon
Arizona
Acadia National Park
Galapagos
Lake Tahoe
Montana
Kauai
Okinawa
US Virgin Islands
Amalfi Coast
Santa Fe
Destin
Curacao
Utah
Joshua Tree
Patagonia
St. Thomas
Florida Keys
Smoky Mountains
Copenhagen
Death Valley
Mallorca
Madeira
Cape Town
Ibiza
Zanzibar
Lake Como
Madrid
New Mexico
Tennessee
Vermont
Wyoming
Bryce Canyon
Oahu
St. Martin
Hilton Head
Dolomites
Cape Cod
San Antonio
Rocky Mountain National Park
Dublin
Catalina Island
Athens
Asheville
Texas
South America
Shenandoah National Park
Phoenix
North Carolina
Medellín
Cairo
Budapest
Arches National Park
St. John
South Carolina
Reykjavik
Mykonos
Milan
Houston
Hanoi
Canary Islands
Big Island of Hawaii
Atlanta
The Caribbean
St. Barts
South Dakota
Rhode Island
New England
Nassau
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Kyoto
Koh Samui
Colorado Springs
Chiang Mai
Stockholm
Porto
Montego Bay
Michigan
Melbourne
Louisiana
Kuala Lumpur
Kruger National Park
Jeju
Florence
Dallas
Zurich
Tampa
St. Kitts
Osaka
Munich
Moorea
Kailua-Kona
Everglades
Door County
Cusco
Calgary
Boracay
Bonaire
Swiss Alps
St. Croix
Seville
San Juan Islands
New Hampshire
Minnesota
Mazatlán
Manila
Kentucky
Isla Mujeres
Guam
French Riviera
Fort Lauderdale
Cinque Terre
Asia
Algarve
Virginia
Tenerife
Sapporo
Nairobi
Mumbai
The Hamptons
Grand Teton National Park
Finger Lakes
Charlotte
Bogotá
Auckland
Maine
Bora Bora
Olympic National Park
Redwood National Park
Sequoia National Park
Big Bend National Park
Mackinac Island
Sint Maarten
Nantucket
Outer Banks
Big Sur
Crater Lake
Scottsdale
Nice
Mount Rainier
Cozumel
Badlands National Park
Salt Lake City
Denali
Philadelphia
Tucson
Provence
Guadalajara
Albuquerque
Upper Peninsula
Sonoma
Memphis
Idaho
Da Nang
Cotswolds
Arkansas
St. Louis
Capri
Glacier National Park
Barcelona
Vancouver
Denver
Istanbul
Riviera Maya
Carmel-by-the-Sea
Santiago, Chile
Naples, Italy
Central America
Minneapolis
Sarasota
Halifax, Nova Scotia
Pittsburgh
Helsinki
Pensacola
Johannesburg
Brisbane
Málaga
Phu Quoc
Perth
Dubrovnik
Corpus Christi
Massachusetts
Oklahoma
Torres del Paine
Czech Republic
Ho Chi Minh City
Anchorage
Boise
Louisville
Juneau
Quito
West Virginia
Wisconsin
Canyonlands National Park
Baja California
Blue Ridge Mountains
Fort Myers
Detroit
Kansas City, Missouri
Kathmandu
Reno
Cebu
Brussels
Guangzhou
Chattanooga
Antalya
Daytona Beach
Cairns
Hilo
Alabama
Connecticut
New Jersey
Pennsylvania
Capitol Reef National Park