Mountain View weather by month

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Mountain View, California, nestled in the heart of Silicon Valley, enjoys a wonderfully mild Mediterranean climate. This means pleasant weather is the norm, but conditions do vary throughout the year. Whether you’re planning a tech conference, a family vacation, or a visit to the Computer History Museum, knowing what to expect weather-wise is key to packing appropriately and maximizing your enjoyment. This guide breaks down the Mountain View weather by month, offering insights into temperature, rainfall, and sunshine hours.

Overview of Mountain View’s Climate

Mountain View benefits from the moderating influence of the San Francisco Bay. This results in warm, dry summers and mild, relatively wet winters. Fog is a common occurrence, particularly during the summer months, rolling in from the Bay and keeping temperatures cooler than inland areas. The city experiences very little extreme weather, making it a comfortable destination year-round. However, microclimates exist – areas closer to the hills can be noticeably warmer during the day and cooler at night.

Spring in Mountain View (March – May)

Spring is a beautiful time to visit Mountain View. Wildflowers bloom, the hills turn green, and the weather begins to warm up.

March: Transition month. Average highs are in the low 60s (°F), and lows dip into the high 40s. Rainfall is still common, with around 2.5 inches expected.

April: Temperatures continue to rise, with average highs reaching the mid-60s. Rainfall decreases, averaging around 1.5 inches. Expect more sunny days.

May: Often considered one of the best months. Average highs are in the upper 60s to low 70s, and sunshine is plentiful. Rainfall is minimal, typically less than 1 inch. The "May Gray" phenomenon (morning fog) can occur, but usually burns off by afternoon.

Summer in Mountain View (June – August)

Summer in Mountain View is warm and dry, though rarely scorching. The Bay breeze and morning fog play a significant role in keeping temperatures comfortable.

June: The fog starts to become more consistent, especially in the mornings. Average highs are in the low 70s, and lows are in the mid-50s. Rainfall is extremely rare.

July: The warmest month of the year. Average highs reach the mid-70s, but can occasionally climb into the 80s. The fog is a regular visitor, providing relief from the heat.

August: Similar to July, with average highs in the mid-70s. The fog continues to be a factor, and evenings are generally pleasant.

Autumn in Mountain View (September – November)

Autumn is often the warmest and clearest time of year in Mountain View, as the fog retreats. It’s a fantastic time for outdoor activities.

September: Considered by many to be the peak season. Average highs are in the upper 70s, and lows are in the mid-50s. Sunshine is abundant, and rainfall is virtually non-existent.

October: Temperatures begin to cool slightly, with average highs in the low 70s. The chance of rain increases, but remains relatively low (around 1.5 inches).

November: A true transition month. Average highs are in the upper 60s, and lows are in the low 50s. Rainfall becomes more frequent, averaging around 2 inches.

Winter in Mountain View (December – February)

Winters in Mountain View are mild and wet compared to many other parts of the country. Snow is extremely rare.

December: The wettest month of the year, with an average of around 3.5 inches of rainfall. Average highs are in the upper 50s, and lows are in the low 40s.

January: Similar to December in terms of rainfall (around 3 inches). Average highs are in the upper 50s, and lows are in the low 40s.

February: Rainfall begins to decrease, averaging around 2.5 inches. Average highs are in the low 60s, and lows are in the upper 40s. The days start to get noticeably longer.

Mountain View Weather by Month: A Quick Reference Table

Month	Avg High (°F)	Avg Low (°F)	Avg Rainfall (inches)	Sunshine Hours
January	58	43	3.0	150
February	62	47	2.5	180
March	63	49	2.5	200
April	66	51	1.5	230
May	71	54	0.8	270
June	73	56	0.2	290
July	75	57	0.1	300
August	75	57	0.1	290
September	78	56	0.2	260
October	72	53	1.5	220
November	67	50	2.0	180
December	58	43	3.5	150

Frequently Asked Questions (FAQ)

Q: What is the hottest month in Mountain View?
A: July is typically the hottest month, with average highs around 75°F.

Q: Does it ever snow in Mountain View?
A: Snow is extremely rare in Mountain View.

Q: What should I pack if I’m visiting in the spring?
A: Layers are key! Pack a light jacket, long-sleeved shirts, and comfortable walking shoes, as well as some warmer weather clothing.

Q: Is the fog really that bad in the summer?
A: The fog isn’t "bad," it’s a characteristic of the area. It often burns off by afternoon, and it keeps temperatures comfortable.

Q: What’s the best month to visit Mountain View for warm, sunny weather?
A: September is generally considered the best month, with warm temperatures and abundant sunshine.