Walnut Creek weather by month

Walnut Creek, California, enjoys a classic Mediterranean climate – mild, wet winters and warm, dry summers. Located in the East Bay region, it’s a fantastic place to live and visit, but knowing what to expect weather-wise throughout the year is key to planning your activities. This guide provides a detailed look at Walnut Creek’s weather by month, helping you make the most of everything this vibrant city has to offer.

January: Cool and Wet Beginnings

January in Walnut Creek is typically the coolest and wettest month. Average high temperatures hover around 57°F (14°C), and lows dip to around 43°F (6°C). Rainfall is frequent, with an average of around 3.5 inches. Expect overcast skies and occasional stronger storms. It’s a good time for cozy indoor activities, but also for enjoying the lush, green hills surrounding the city.

February: Lingering Winter Showers

February continues the pattern of cool temperatures and rainfall, though typically slightly drier than January. Average highs reach 60°F (16°C), and lows remain around 45°F (7°C). Rainfall averages around 3 inches. Wildflowers begin to appear in the hills as the days slowly get longer.

March: Transition to Spring

March marks a noticeable shift towards spring. Temperatures begin to climb, with average highs around 64°F (18°C) and lows around 48°F (9°C). Rainfall decreases to approximately 2.5 inches. The hillsides become increasingly vibrant with blooming wildflowers, making it a beautiful time for hiking and outdoor exploration.

April: Blossoming Beauty

April is a delightful month in Walnut Creek. The weather is mild and pleasant, with average highs of 69°F (21°C) and lows of 51°F (11°C). Rainfall is minimal, averaging around 1.5 inches. Parks and gardens are in full bloom, and outdoor dining becomes increasingly popular.

May: Warm and Sunny Days

May brings consistently warm and sunny weather. Average highs reach 74°F (23°C), and lows are around 55°F (13°C). Rainfall is rare, typically less than 0.5 inches. It’s an ideal time for outdoor activities like hiking, biking, and enjoying the many parks and open spaces.

June: The Start of Summer Heat

June officially kicks off summer in Walnut Creek. Temperatures continue to rise, with average highs around 80°F (27°C) and lows around 59°F (15°C). Rainfall is virtually nonexistent. Expect long, sunny days perfect for outdoor events and exploring the downtown area.

July: Peak Summer Warmth

July is typically the hottest month of the year. Average highs soar to 86°F (30°C), and lows remain around 63°F (17°C). The sun is strong, and shade is welcome during the hottest part of the day. It’s a great time for swimming, visiting Mount Diablo State Park, or enjoying a cool drink on a patio.

August: Continued Summer Heat

August is very similar to July, with continued hot and dry conditions. Average highs are around 85°F (29°C), and lows are around 62°F (17°C). The Delta Breeze often provides some relief in the evenings.

September: Pleasant Autumn Begins

September marks the beginning of autumn, bringing a welcome decrease in temperatures. Average highs are around 80°F (27°C), and lows are around 58°F (14°C). The weather remains sunny and dry, making it a perfect time for outdoor activities.

October: Golden Fall Days

October is arguably one of the most beautiful months in Walnut Creek. Temperatures are mild and comfortable, with average highs around 74°F (23°C) and lows around 53°F (12°C). The hillsides display stunning fall colors.

November: Cool and Crisp

November brings cooler temperatures and a slight increase in rainfall. Average highs are around 64°F (18°C), and lows are around 46°F (8°C). Rainfall averages around 1.5 inches. It’s a good time for hiking and enjoying the changing foliage.

December: Return of Winter Weather

December sees a return to cooler, wetter conditions. Average highs are around 57°F (14°C), and lows are around 43°F (6°C). Rainfall averages around 3 inches. The city often embraces the holiday spirit with festive decorations and events.

Walnut Creek Weather by Month – At a Glance

Month	Avg High (°F)	Avg Low (°F)	Avg Rainfall (inches)
January	57	43	3.5
February	60	45	3.0
March	64	48	2.5
April	69	51	1.5
May	74	55	0.5
June	80	59	0.1
July	86	63	0.0
August	85	62	0.0
September	80	58	0.2
October	74	53	1.0
November	64	46	1.5
December	57	43	3.0

Frequently Asked Questions (FAQ)

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

Q: What is the hottest month in Walnut Creek?
A: July is generally the hottest month.

Q: Does Walnut Creek get snow?
A: Snow is extremely rare in Walnut Creek.

Q: What is the Delta Breeze?
A: The Delta Breeze is a cooling wind that often blows in from the Sacramento-San Joaquin Delta, providing relief from the summer heat, especially in the evenings.

Q: What should I pack if I’m visiting Walnut Creek in the winter?
A: Pack layers, including a waterproof jacket, sweater, and comfortable walking shoes.