Monthly weather forecast and climate
Willowbrook, CA

Weather in January

January, the same as December, is another comfortable winter month in Willowbrook, California, with average temperature varying between 65.8°F (18.8°C) and 52.2°F (11.2°C). In Willowbrook, the average high-temperature in January is relatively the same as in December - a still enjoyable 65.8°F (18.8°C). Weather in January »

Weather in February

The last month of the winter, February, is another comfortable month in Willowbrook, California, with average temperature ranging between max 64.9°F (18.3°C) and min 51.4°F (10.8°C). In February, the average high-temperature is essentially the same as in January - a still enjoyable 64.9°F (18.3°C). Weather in February »

Weather in March

The first month of the spring, March, is still a comfortable month in Willowbrook, California, with average temperature varying between 53.1°F (11.7°C) and 67.1°F (19.5°C). In March, the average high-temperature is relatively the same as in February - a still enjoyable 67.1°F (19.5°C). Weather in March »

Weather in April

April is a pleasant spring month in Willowbrook, California, with average temperature varying between 69.4°F (20.8°C) and 54.5°F (12.5°C). In April, the average high-temperature is practically the same as in March - a pleasant 69.4°F (20.8°C). Weather in April »

Weather in May

The last month of the spring, May, is also an agreeable month in Willowbrook, California, with average temperature fluctuating between 71.4°F (21.9°C) and 56.7°F (13.7°C). In May, the average high-temperature is almost the same as in April - a still pleasant 71.4°F (21.9°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Willowbrook, California, with temperature in the range of an average high of 74.8°F (23.8°C) and an average low of 59.4°F (15.2°C). In Willowbrook, the average high-temperature in June is essentially the same as in May - a warm 74.8°F (23.8°C). Weather in June »

Weather in July

July, like June, in Willowbrook, California, is another warm summer month, with average temperature fluctuating between 63.9°F (17.7°C) and 79.3°F (26.3°C). In Willowbrook, the average high-temperature in July is practically the same as in June - a still warm 79.3°F (26.3°C). Weather in July »

Weather in August

August, the last month of the summer, in Willowbrook, is another warm month, with average temperature ranging between max 81.1°F (27.3°C) and min 65.1°F (18.4°C). The warmest month is August, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 65.1°F (18.4°C). In August, the average heat index is estimated at 83.7°F (28.7°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Willowbrook, California, with average temperature ranging between max 80.2°F (26.8°C) and min 64.8°F (18.2°C). In Willowbrook, the average high-temperature in September is almost the same as in August - a still moderately hot 80.2°F (26.8°C). Weather in September »

Weather in October

October, like September, in Willowbrook, California, is a moderately hot autumn month, with temperature in the range of an average low of 62.2°F (16.8°C) and an average high of 76.1°F (24.5°C). In Willowbrook, California, the average high-temperature in October is relatively the same as in September - a still warm 76.1°F (24.5°C). Weather in October »

Weather in November

November, the last month of the autumn, in Willowbrook, is another pleasant month, with temperature in the range of an average high of 70.3°F (21.3°C) and an average low of 56.8°F (13.8°C). In November, the average high-temperature slightly decreases, from a moderately hot 76.1°F (24.5°C) in October, to an agreeable 70.3°F (21.3°C). Weather in November »

Weather in December

December, the first month of the winter, in Willowbrook, is still a comfortable month, with average temperature varying between 64°F (17.8°C) and 51.6°F (10.9°C). December is the coldest month, with an average high-temperature of 64°F (17.8°C) and an average low-temperature of 51.6°F (10.9°C). Weather in December »
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FAQ

How much does it rain in Willowbrook?

Throughout the year, in Willowbrook, California, there are 49.7 rainfall days, and 6.77" (172mm) of precipitation is accumulated.

What is the wettest month in Willowbrook?

Months with the most rainfall in Willowbrook are January and February, with an average 1.26" (32mm) of precipitation.

What are the months with the lowest UV index in Willowbrook?

January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index.

What is the most humid month in Willowbrook?

The most humid month in Willowbrook is June, with an average relative humidity of 69%.

What is the driest month in Willowbrook?

June is the month with the least rainfall in Willowbrook, California. Rain falls for 1.3 days and accumulates 0.08" (2mm) of precipitation.

When are the longest days in Willowbrook?

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

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

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

What are the months with the most sunshine in Willowbrook?

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

What is the warmest month in Willowbrook?

With an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 65.1°F (18.4°C), August is the warmest month in Willowbrook.

What is the least humid month in Willowbrook?

The least humid month is November, with an average relative humidity of 53%.

What is the coldest month in Willowbrook?

The coldest month in Willowbrook, California, is December, with an average high-temperature of 64°F (17.8°C) and an average low-temperature of 51.6°F (10.9°C).

What is the month with the shortest days in Willowbrook?

December has the shortest days of the year, with an average of 9.9h of daylight.

What is the month with the least sunshine in Willowbrook?

The month with the least sunshine in Willowbrook is December, with an average of 6.7h of sunshine.

Average temperature
Willowbrook, CA

Average temperature - Willowbrook, CA

The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (64°F).

The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (51.4°F).

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Average pressure
Willowbrook, CA

Average pressure - Willowbrook, CA

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are June and September (29.89").

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Average wind speed
Willowbrook, CA

Average wind speed - Willowbrook, CA

The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are September and October (4.8mph).

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Average rainfall
Willowbrook, CA

Average rainfall - Willowbrook, CA

The wettest months (with the highest rainfall) are January and February (1.26").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days
Willowbrook, CA

Average rainfall days - Willowbrook, CA

The month with the highest number of rainy days is March (7 days).
The month with the least rainy days is June (1.3 days).

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Average daylight / Average sunshine
Willowbrook, CA

Average daylight / Average sunshine - Willowbrook, 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 July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days
Willowbrook, CA

Average sunshine days - Willowbrook, CA

The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is February (21.1 days).

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Average UV index
Willowbrook, CA

Average UV index - Willowbrook, CA

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average visibility
Willowbrook, CA

Average visibility - Willowbrook, 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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