Monthly weather forecast and climate
Los Altos, CA

Weather in January

January, like December, is a moderate winter month in Los Altos, California, with temperature in the range of an average low of 44.2°F (6.8°C) and an average high of 57.7°F (14.3°C). In Los Altos, the average high-temperature is relatively the same as in December - a still mild 57.7°F (14.3°C). Weather in January »

Weather in February

February, the last month of the winter, in Los Altos, is also a moderate month, with average temperature fluctuating between 59.9°F (15.5°C) and 44.2°F (6.8°C). In February, the average high-temperature is almost the same as in January - a still moderate 59.9°F (15.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a comfortable month in Los Altos, California, with average temperature ranging between max 62.2°F (16.8°C) and min 45°F (7.2°C). In Los Altos, the average high-temperature is relatively the same as in February - a comfortable 62.2°F (16.8°C). Weather in March »

Weather in April

April, the same as March, is another enjoyable spring month in Los Altos, California, with average temperature varying between 46°F (7.8°C) and 66.2°F (19°C). In Los Altos, the average high-temperature is essentially the same as in March - a still comfortable 66.2°F (19°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Los Altos, California, with average temperature fluctuating between 49.5°F (9.7°C) and 69.3°F (20.7°C). In Los Altos, the average high-temperature is relatively the same as in April - a pleasant 69.3°F (20.7°C). Weather in May »

Weather in June

June, the first month of the summer, in Los Altos, is a warm month, with average temperature ranging between max 76.6°F (24.8°C) and min 53.4°F (11.9°C). In Los Altos, California, the average high-temperature slightly increases, from a pleasant 69.3°F (20.7°C) in May, to a warm 76.6°F (24.8°C). Weather in June »

Weather in July

July, like June, in Los Altos, California, is a moderately hot summer month, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 55.2°F (12.9°C). July is the warmest month, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 55.2°F (12.9°C). Weather in July »

Weather in August

August, the last month of the summer, in Los Altos, is another warm month, with average temperature fluctuating between 56.8°F (13.8°C) and 79.3°F (26.3°C). In Los Altos, the average high-temperature is relatively the same as in July - a still moderately hot 79.3°F (26.3°C). Weather in August »

Weather in September

September, the first month of the autumn, in Los Altos, is also a moderately hot month, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 77.9°F (25.5°C). In Los Altos, the average high-temperature is practically the same as in August - a still warm 77.9°F (25.5°C). Weather in September »

Weather in October

October, like September, is an agreeable autumn month in Los Altos, California, with average temperature ranging between max 71.8°F (22.1°C) and min 54°F (12.2°C). In October, the average high-temperature marginally drops, from a moderately hot 77.9°F (25.5°C) in September, to an agreeable 71.8°F (22.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is another comfortable month in Los Altos, California, with temperature in the range of an average high of 63.7°F (17.6°C) and an average low of 48.7°F (9.3°C). In Los Altos, California, the average high-temperature slightly decreases, from a pleasant 71.8°F (22.1°C) in October, to an enjoyable 63.7°F (17.6°C). Weather in November »

Weather in December

The first month of the winter, December, is also a moderate month in Los Altos, California, with average temperature ranging between max 56.5°F (13.6°C) and min 44.1°F (6.7°C). With an average high-temperature of 56.5°F (13.6°C) and an average low-temperature of 44.1°F (6.7°C), December is the coldest month. Weather in December »
[Resources]

FAQ

How much does it rain in Los Altos?

In Los Altos, California, during the entire year, the rain falls for 53.1 days and collects up to 4.41" (112mm) of precipitation.

What is the wettest month in Los Altos?

Months with the most rainfall in Los Altos, California, are February, March and December, with an average 0.83" (21mm) of precipitation.

What are the months with the lowest UV index in Los Altos?

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 Los Altos?

March is the most humid month in Los Altos, with an average relative humidity of 73%.

What is the driest month in Los Altos?

June through August are months with the least rain in Los Altos, California, when the rain falls for 1.5 days and typically aggregates up to 0.04" (1mm) of rain.

When are the longest days in Los Altos?

The month with the longest days is June, with an average of 14.7h of daylight.

When is the highest UV index in Los Altos?

June is the month with the highest UV index in Los Altos, with an average maximum UV index of 6.

What is the warmest month in Los Altos?

July is the warmest month, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 55.2°F (12.9°C).

What is the least humid month in Los Altos?

July, September and October, with an average relative humidity of 63%, are the least humid months in Los Altos.

What are the months with the most sunshine in Los Altos?

Months with the most sunshine are July and August, with an average of 12h of sunshine.

What is the coldest month in Los Altos?

With an average high-temperature of 56.5°F (13.6°C) and an average low-temperature of 44.1°F (6.7°C), December is the coldest month.

What is the month with the shortest days in Los Altos?

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

What is the month with the least sunshine in Los Altos?

With an average of 5.9h of sunshine, December has the least sunshine of the year in Los Altos.

Average temperature
Los Altos, CA

Average temperature - Los Altos, CA

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (56.5°F).

The month with the highest average low temperature is August (56.8°F).
The coldest month (with the lowest average low temperature) is December (44.1°F).

[Resources]

Average pressure
Los Altos, CA

Average pressure - Los Altos, CA

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June and September (29.92").

[Resources]

Average wind speed
Los Altos, CA

Average wind speed - Los Altos, CA

The windiest months (with the highest average wind speed) are April and May (6.2mph).
The calmest months (with the lowest average wind speed) are August, September, October and November (4.7mph).

[Resources]

Average humidity
Los Altos, CA

Average humidity - Los Altos, CA

The month with the highest relative humidity is March (73%).
Months with the lowest relative humidity are July, September and October (63%).

[Resources]

Average rainfall
Los Altos, CA

Average rainfall - Los Altos, CA

The wettest months (with the highest rainfall) are February, March and December (0.83").
The driest months (with the least rainfall) are June, July and August (0.04").

[Resources]

Average rainfall days
Los Altos, CA

Average rainfall days - Los Altos, CA

The month with the highest number of rainy days is March (10 days).
The month with the least rainy days is August (0.4 days).

[Resources]

Average daylight / Average sunshine
Los Altos, CA

Average daylight / Average sunshine - Los Altos, CA

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

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.9h).

[Resources]

Average sunshine days
Los Altos, CA

Average sunshine days - Los Altos, CA

Months with the most sunshine days are July and August (29.8 days).
The month with the least sunshine days is March (19.4 days).

[Resources]

Average visibility
Los Altos, CA

Average visibility - Los Altos, CA

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]