Monthly weather forecast and climate
Winnetka, CA

Weather in January

January, like December, in Winnetka, California, is another enjoyable winter month, with average temperature varying between 47.7°F (8.7°C) and 63.5°F (17.5°C). In January, the average high-temperature is relatively the same as in December - a still comfortable 63.5°F (17.5°C). Weather in January »

Weather in February

The last month of the winter, February, is also an enjoyable month in Winnetka, California, with average temperature ranging between max 63.3°F (17.4°C) and min 47.1°F (8.4°C). In February, the average high-temperature is essentially the same as in January - a still comfortable 63.3°F (17.4°C). Weather in February »

Weather in March

The first month of the spring, March, is still a comfortable month in Winnetka, California, with average temperature fluctuating between 66.6°F (19.2°C) and 48.7°F (9.3°C). In March, the average high-temperature is relatively the same as in February - a still enjoyable 66.6°F (19.2°C). Weather in March »

Weather in April

April in Winnetka, California, is a pleasant spring month, with temperature in the range of an average high of 70.3°F (21.3°C) and an average low of 50.9°F (10.5°C). In Winnetka, the average high-temperature in April is almost the same as in March - a pleasant 70.3°F (21.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Winnetka, California, with average temperature fluctuating between 54.5°F (12.5°C) and 73.8°F (23.2°C). In May, the average high-temperature is relatively the same as in April - a moderately hot 73.8°F (23.2°C). Weather in May »

Weather in June

June, the first month of the summer, in Winnetka, is also a moderately hot month, with temperature in the range of an average low of 58.6°F (14.8°C) and an average high of 79°F (26.1°C). In June, the average high-temperature is essentially the same as in May - a still moderately hot 79°F (26.1°C). Weather in June »

Weather in July

July, like June, in Winnetka, California, is another warm summer month, with average temperature fluctuating between 84.2°F (29°C) and 63.7°F (17.6°C). In July, the average high-temperature is practically the same as in June - a still warm 84.2°F (29°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Winnetka, California, with average temperature fluctuating between 64.8°F (18.2°C) and 85.6°F (29.8°C). August is the warmest month, with an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 64.8°F (18.2°C). In August, the average heat index is estimated at a tropical 88°F (31.1°C). Weather in August »

Weather in September

September, the first month of the autumn, in Winnetka, is also a moderately hot month, with average temperature ranging between min 63°F (17.2°C) and max 83.1°F (28.4°C). In September, the average high-temperature is essentially the same as in August - a still moderately hot 83.1°F (28.4°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Winnetka, California, with average temperature varying between 76.8°F (24.9°C) and 58.5°F (14.7°C). In October, the average high-temperature marginally drops, from 83.1°F (28.4°C) in September, to a still warm 76.8°F (24.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is another pleasant month in Winnetka, California, with average temperature fluctuating between 69.6°F (20.9°C) and 52.7°F (11.5°C). In Winnetka, the average high-temperature in November slightly decreases, from a warm 76.8°F (24.9°C) in October, to an agreeable 69.6°F (20.9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Winnetka, California, with average temperature varying between 61.9°F (16.6°C) and 46.9°F (8.3°C). With an average high-temperature of 61.9°F (16.6°C) and an average low-temperature of 46.9°F (8.3°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Winnetka?

In Winnetka, during the entire year, the rain falls for 42.7 days and collects up to 6.46" (164mm) of precipitation.

How many days does it snow in Winnetka?

Throughout the year, in Winnetka, California, there are 0.1 snowfall days.

When it does not snow in Winnetka?

January through November are months without snowfall in Winnetka.

What is the month with the least sunshine in Winnetka?

January, February and December, with an average of 6.8h of sunshine, are months with the least sunshine in Winnetka.

What is the wettest month in Winnetka?

The month with the most rainfall in Winnetka, California, is February when the rain falls for 4.8 days and typically aggregates up to 1.22" (31mm) of precipitation.

What is the most humid month in Winnetka?

The most humid month in Winnetka, California, is June, with an average relative humidity of 59%.

What is the driest month in Winnetka?

The month with the least rainfall is June when the rain falls for 1.4 days and typically collects 0.04" (1mm) of precipitation.

When are the longest days in Winnetka?

With an average of 14.4h of daylight, June has the longest days of the year.

What is the month with the most sunshine in Winnetka?

June and July, with an average of 12.1h of sunshine, are months with the most sunshine in Winnetka.

What are the months with the highest UV index in Winnetka?

Months with the highest UV index are June through September, with an average maximum UV index of 6.

What is the warmest month in Winnetka?

The warmest month in Winnetka, California, is August, with an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 64.8°F (18.2°C).

What is the least humid month in Winnetka?

November is the least humid month in Winnetka, California, with an average relative humidity of 47%.

What is the coldest month in Winnetka?

The coldest month in Winnetka, California, is December, with an average high-temperature of 61.9°F (16.6°C) and an average low-temperature of 46.9°F (8.3°C).

When does it snow in Winnetka?

The only month with snowfall in Winnetka is December.

When does it snow the most in Winnetka?

December has the most snowfall days of the year in Winnetka. Snow falls for 0.1 days.

What is the month with the shortest days in Winnetka?

The month with the shortest days in Winnetka, California, is December, with an average of 9.9h of daylight.

When is the lowest UV index in Winnetka?

The month with the lowest UV index in Winnetka is December, with an average maximum UV index of 3.

Average temperature
Winnetka, CA

Average temperature - Winnetka, CA

The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (61.9°F).

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.9°F).

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Average pressure
Winnetka, CA

Average pressure - Winnetka, CA

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.89").

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Average wind speed
Winnetka, CA

Average wind speed - Winnetka, CA

The windiest months (with the highest average wind speed) are January and December (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average rainfall
Winnetka, CA

Average rainfall - Winnetka, CA

The wettest month (with the highest rainfall) is February (1.22").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Winnetka, CA

Average rainfall days - Winnetka, CA

The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.4 days).

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Average snowfall days
Winnetka, CA

Average snowfall days - Winnetka, CA

The month with the highest number of snowfall days is December (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight / Average sunshine
Winnetka, CA

Average daylight / Average sunshine - Winnetka, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

Months with the most sunshine are June and July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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Average sunshine days
Winnetka, CA

Average sunshine days - Winnetka, CA

Months with the most sunshine days are August and October (27.3 days).
The month with the least sunshine days is February (22 days).

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Average visibility
Winnetka, CA

Average visibility - Winnetka, 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).

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