Sonoma weather by month - Nearby Airport

Sonoma County, California, is renowned for its stunning vineyards, charming towns, and breathtaking coastline. But to truly enjoy everything Sonoma has to offer, knowing what to expect from the weather is key. This guide breaks down the Sonoma weather by month, helping you plan your visit for optimal conditions, whether you’re a wine enthusiast, outdoor adventurer, or simply seeking a relaxing getaway.

January: Cool & Cozy

January in Sonoma is typically the coolest and wettest month. Expect average high temperatures around 57°F (14°C) and lows around 40°F (4°C). Rainfall is common, creating lush landscapes, but also potentially impacting outdoor activities. It’s a great time for cozying up by a fireplace with a glass of local wine, enjoying indoor wine tastings, and exploring the region’s art galleries and museums.

February: Winter Lingers, Buds Begin

February continues the winter pattern, with similar temperatures to January – highs around 58°F (14°C) and lows around 41°F (5°C). Rainfall remains likely, but the days are starting to get noticeably longer. This is a beautiful time to witness the early signs of spring as buds begin to swell on the vines.

March: Spring Awakening

March marks the transition to spring. Temperatures begin to climb, with average highs reaching 62°F (17°C) and lows around 44°F (7°C). Rainfall decreases, and wildflowers start to bloom, painting the hillsides in vibrant colors. It’s a fantastic time for hiking and exploring the Sonoma Coast.

April: Blossoms & Sunshine

April is a truly magical month in Sonoma. The vineyards come alive with blossoms, creating a stunning visual spectacle. Temperatures are mild, averaging 66°F (19°C) for highs and 48°F (9°C) for lows. Sunshine is plentiful, making it ideal for outdoor activities like biking, kayaking, and wine tasting.

May: Warm Days & Gentle Breezes

May offers warm, sunny days and gentle breezes. Average high temperatures reach 71°F (22°C), with lows around 52°F (11°C). The weather is perfect for enjoying picnics in the vineyards, exploring the Russian River, and attending outdoor events.

June: Summer Arrives

June officially kicks off summer in Sonoma. Temperatures continue to rise, with average highs around 75°F (24°C) and lows around 56°F (13°C). The days are long and sunny, perfect for all kinds of outdoor adventures. Expect minimal rainfall.

July & August: Peak Summer Heat

July and August are the hottest months in Sonoma. Average high temperatures reach 80-82°F (27-28°C), with lows around 58-60°F (14-16°C). These months are ideal for swimming, sunbathing, and enjoying outdoor concerts and festivals. Be prepared for potential heat waves, especially inland.

September: Harvest Season & Golden Light

September is arguably the best month to visit Sonoma. The weather is warm and sunny, with average highs around 78°F (26°C) and lows around 57°F (14°C). It’s harvest season, so the vineyards are bustling with activity, and the air is filled with the sweet scent of grapes. The light is particularly beautiful this time of year, making for stunning photos.

October: Crisp Air & Fall Colors

October brings crisp, cool air and beautiful fall colors. Average high temperatures are around 72°F (22°C), with lows around 52°F (11°C). Rainfall starts to increase, but there are still plenty of sunny days. It’s a great time for wine tasting, hiking, and enjoying the fall foliage.

November: Quiet Season & Cozy Vibes

November marks the beginning of the quiet season in Sonoma. Temperatures cool down, with average highs around 64°F (18°C) and lows around 46°F (8°C). Rainfall becomes more frequent, creating a peaceful and cozy atmosphere. It’s a good time to find deals on accommodations and enjoy a more relaxed pace.

December: Festive Cheer & Mild Weather

December in Sonoma is mild and festive. Average high temperatures are around 57°F (14°C) and lows around 41°F (5°C). While rainfall is possible, it’s often interspersed with sunny days. The towns are decorated for the holidays, and there are plenty of festive events to enjoy.

Sonoma Weather by Month: A Quick Reference

Month	Avg. High (°F)	Avg. Low (°F)	Rainfall (inches)
January	57	40	4.5
February	58	41	4.0
March	62	44	3.5
April	66	48	2.5
May	71	52	1.5
June	75	56	0.8
July	80	58	0.3
August	82	60	0.2
September	78	57	0.5
October	72	52	1.8
November	64	46	2.8
December	57	41	3.8

Frequently Asked Questions (FAQ)

Q: What is the rainiest month in Sonoma?
A: January is typically the rainiest month in Sonoma.

Q: What is the hottest month in Sonoma?
A: August is usually the hottest month, with average highs around 82°F.

Q: Is Sonoma foggy?
A: The Sonoma Coast can experience fog, especially during the summer months. Inland areas are generally less foggy.

Q: What should I pack for a trip to Sonoma in the fall?
A: Layers are key! Pack a light jacket, sweater, long-sleeved shirts, and comfortable walking shoes.

Q: Is September a good time to visit Sonoma for wine tasting?
A: Absolutely! September is harvest season, making it a particularly exciting time to visit the vineyards.