Palo Alto
California, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Palo Alto, CA

A beautiful view of palm trees and the iconic Hoover Tower within Stanford University in Palo Alto, California, a cool and sunny day with cloudy skies
A beautiful view of palm trees and the iconic Hoover Tower within Stanford University in Palo Alto, California, a cool and sunny day with cloudy skies
January, the same as December, in Palo Alto, California, is a moderate winter month, with temperature in the range of an average high of 57.6°F (14.2°C) and an average low of 45.1°F (7.3°C). In Palo Alto, the average high-temperature is relatively the same as in December - a still moderate 57.6°F (14.2°C). Weather in January »

February, the last month of the winter, in Palo Alto, is also a moderate month, with average temperature ranging between max 59.5°F (15.3°C) and min 45.1°F (7.3°C). In Palo Alto, the average high-temperature in February is essentially the same as in January - a still mild 59.5°F (15.3°C). Weather in February »

The first month of the spring, March, is a comfortable month in Palo Alto, California, with average temperature varying between 45.7°F (7.6°C) and 61.3°F (16.3°C). In March, the average high-temperature is almost the same as in February - an enjoyable 61.3°F (16.3°C). Weather in March »

April, like March, in Palo Alto, California, is another comfortable spring month, with average temperature ranging between min 47.1°F (8.4°C) and max 64.9°F (18.3°C). In Palo Alto, the average high-temperature is essentially the same as in March - a still enjoyable 64.9°F (18.3°C). Weather in April »

May, the last month of the spring, in Palo Alto, is an agreeable month, with average temperature fluctuating between 68.2°F (20.1°C) and 49.6°F (9.8°C). In May, the average high-temperature is essentially the same as in April - an agreeable 68.2°F (20.1°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Palo Alto, California, with average temperature ranging between max 74.8°F (23.8°C) and min 53.8°F (12.1°C). In Palo Alto, the average high-temperature in June slightly increases, from a pleasant 68.2°F (20.1°C) in May, to a moderately hot 74.8°F (23.8°C). Weather in June »

July, like June, in Palo Alto, California, is a moderately hot summer month, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 77.5°F (25.3°C). The warmest months are July and August, with an average high-temperature of 77.5°F (25.3°C). Weather in July »

The last month of the summer, August, is another warm month in Palo Alto, California, with temperature in the range of an average low of 57°F (13.9°C) and an average high of 77.5°F (25.3°C). The warmest months are July and August, with an average high-temperature of 77.5°F (25.3°C). Weather in August »

The first month of the autumn, September, is also a moderately hot month in Palo Alto, California, with average temperature varying between 56.7°F (13.7°C) and 76.5°F (24.7°C). In September, the average high-temperature is almost the same as in August - a still warm 76.5°F (24.7°C). Weather in September »

October, the same as September, in Palo Alto, California, is another pleasant autumn month, with temperature in the range of an average low of 54.5°F (12.5°C) and an average high of 70.3°F (21.3°C). In Palo Alto, the average high-temperature in October slightly decreases, from a moderately hot 76.5°F (24.7°C) in September, to an agreeable 70.3°F (21.3°C). Weather in October »

The last month of the autumn, November, is another comfortable month in Palo Alto, California, with average temperature varying between 62.8°F (17.1°C) and 49.3°F (9.6°C). In November, the average high-temperature marginally drops, from a pleasant 70.3°F (21.3°C) in October, to a comfortable 62.8°F (17.1°C). Weather in November »

The first month of the winter, December, is still a mild month in Palo Alto, California, with average temperature fluctuating between 56.3°F (13.5°C) and 45.5°F (7.5°C). December is the coldest month, with an average high-temperature of 56.3°F (13.5°C) and an average low-temperature of 45.5°F (7.5°C). Weather in December »

How much does it rain in Palo Alto?

In Palo Alto, during the entire year, the rain falls for 63.3 days and collects up to 9.53" (242mm) of precipitation.

What is the rainiest month in Palo Alto?

The month with the most rainfall in Palo Alto, California, is February when the rain falls for 7.8 days and typically aggregates up to 2.01" (51mm) of precipitation.

What are the months with the lowest UV index in Palo Alto?

Months with the lowest UV index are February, November and December, with an average maximum UV index of 3.

What is the most humid month in Palo Alto?

The most humid month is March, with an average relative humidity of 74%.

When is the highest UV index in Palo Alto?

April through October, with an average maximum UV index of 5, are months with the highest UV index in Palo Alto, California.

When are the longest days in Palo Alto?

June has the longest days of the year in Palo Alto, California, with an average of 14.7h of daylight.

What are the warmest months in Palo Alto?

July and August, with an average high-temperature of 77.5°F (25.3°C), are warmest months in Palo Alto, California.

What is the driest month in Palo Alto?

The only month without rainfall in Palo Alto, California, is July.

What month has the most sunshine in Palo Alto?

With an average of 12.1h of sunshine, July has the most sunshine of the year.

When does it rain in Palo Alto?

January through June, August through December are months with rainfall in Palo Alto, California.

What are the least humid months in Palo Alto?

Months with the lowest humidity are September and October, with an average relative humidity of 65%.

What is the coldest month in Palo Alto?

The coldest month is December, with an average high-temperature of 56.3°F (13.5°C) and an average low-temperature of 45.5°F (7.5°C).

What is the month with the shortest days in Palo Alto?

The month with the shortest days in Palo Alto is December, with an average of 9.6h of daylight.

What is the month with the least sunshine in Palo Alto?

The month with the least sunshine in Palo Alto is December, with an average of 5.9h of sunshine.
Average temperature - Palo Alto, CA

Warmest months (with the highest average high temperature) are July and August (77.5°F).
The month with the lowest average high temperature is December (56.3°F).

The month with the highest average low temperature is August (57°F).
Coldest months (with the lowest average low temperature) are January and February (45.1°F).

Average humidity - Palo Alto, CA
Average rainfall - Palo Alto, CA
Average rainfall days - Palo Alto, CA

The month with the highest number of rainy days is March (12.3 days).
The month with the lowest number of rainy days is August (0.6 days).

Average daylight / Average sunshine - Palo Alto, CA

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

The month with most sunshine is July (Average sunshine: 12.1h).
The month with least sunshine is December (Average sunshine: 5.9h).

Average UV index - Palo Alto, CA

Months with the highest UV index are April, May, June, July, August, September and October (UV index 5).
Months with the lowest UV index are February, November and December (UV index 3).