Climate and monthly weather forecast
Montclair, CA

Weather in January

January, the same as December, is another comfortable winter month in Montclair, California, with an average temperature ranging between max 64.6°F (18.1°C) and min 46.8°F (8.2°C). In January, the average high-temperature is relatively the same as in December - a still comfortable 64.6°F (18.1°C). Weather in January »

Weather in February

The last month of the winter, February, is another comfortable month in Montclair, California, with an average temperature fluctuating between 64°F (17.8°C) and 45.7°F (7.6°C). In February, the average high-temperature is almost the same as in January - a still comfortable 64°F (17.8°C). Weather in February »

Weather in March

March, the first month of the spring in Montclair, is a pleasant month, with an average temperature varying between 68.4°F (20.2°C) and 46.9°F (8.3°C). In March, the average high-temperature is relatively the same as in February - an agreeable 68.4°F (20.2°C). Weather in March »

Weather in April

April, the same as March, in Montclair, California, is another pleasant spring month, with an average temperature varying between 50.2°F (10.1°C) and 72.9°F (22.7°C). In April, the average high-temperature is essentially the same as in March - a still agreeable 72.9°F (22.7°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Montclair, California, with an average temperature varying between 76.6°F (24.8°C) and 53.6°F (12°C). In Montclair, the average high-temperature in May is almost the same as in April - a moderately hot 76.6°F (24.8°C). Weather in May »

Weather in June

The first month of the summer, June, is also a moderately hot month in Montclair, California, with an average temperature varying between 58.5°F (14.7°C) and 84°F (28.9°C). In Montclair, the average high-temperature in June slightly increases from 76.6°F (24.8°C) in May to a still moderately hot 84°F (28.9°C). Weather in June »

Weather in July

July in Montclair, California, is a tropical summer month, with an average temperature fluctuating between 64.8°F (18.2°C) and 90°F (32.2°C). In Montclair, the average high-temperature in July slightly increases from a warm 84°F (28.9°C) in June to a hot 90°F (32.2°C). Weather in July »

Weather in August

August, the last month of the summer in Montclair, is another hot month, with an average temperature fluctuating between 65.8°F (18.8°C) and 91°F (32.8°C). August is the warmest month, with an average high-temperature of 91°F (32.8°C) and an average low-temperature of 65.8°F (18.8°C). In August, the average heat index is calculated to be a tropical 93.2°F (34°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a hot month in Montclair, California, with an average temperature varying between 63.5°F (17.5°C) and 88.2°F (31.2°C). In September, the average high-temperature is almost the same as in August - a still hot 88.2°F (31.2°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Montclair, California, with an average temperature varying between 57.9°F (14.4°C) and 79°F (26.1°C). In Montclair, the average high-temperature in October decreases from a hot 88.2°F (31.2°C) in September to a warm 79°F (26.1°C). Weather in October »

Weather in November

November, the last month of the autumn in Montclair, is another pleasant month, with temperature in the range of an average high of 70.7°F (21.5°C) and an average low of 50.9°F (10.5°C). In November, the average high-temperature slightly decreases from a warm 79°F (26.1°C) in October to an agreeable 70.7°F (21.5°C). Weather in November »

Weather in December

December, the first month of the winter in Montclair, is also an enjoyable month, with an average temperature varying between 62.1°F (16.7°C) and 45.5°F (7.5°C). December is the coldest month, with an average high-temperature of 62.1°F (16.7°C) and an average low-temperature of 45.5°F (7.5°C). Weather in December »
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FAQ

How many days does it rain in Montclair?

Throughout the year, there are 49.6 rainfall days, and 7.8" (198mm) of precipitation is accumulated.

When it does not snow in Montclair?

In Montclair, snow does not fall in January, March through December.

How many days does it snow in Montclair?

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

What is the rainiest month in Montclair?

The month with the most rainfall in Montclair is February, when the rain falls for 6 days and typically aggregates up to 1.77" (45mm) of precipitation.

When does it snow in Montclair?

The only month with snowfall in Montclair is February.

What is the snowiest month in Montclair?

The month with the most snowfall days is February, when snow falls for 0.1 days.

What are the months with the least sunshine in Montclair?

The months with the least sunshine are February and December, with an average of 6.9h of sunshine.

What are the most humid months in Montclair?

March and May, with an average relative humidity of 54%, are most humid months in Montclair, California.

When is Daylight Saving Time (DST) in Montclair?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Montclair, California, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from PDT to PST.

What is the driest month in Montclair?

The month with the least rainfall in Montclair, California, is June, when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.

When are the longest days in Montclair?

The month with the longest days is June, with an average of 14h and 23min of daylight.

What month has the most sunshine in Montclair?

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

When is the highest UV index in Montclair?

The months with the highest UV index are July and August, with an average maximum UV index of 7.

What is the warmest month in Montclair?

August is the warmest month, with an average high-temperature of 91°F (32.8°C) and an average low-temperature of 65.8°F (18.8°C).

What is the least humid month in Montclair?

August is the least humid month, with an average relative humidity of 42%.

What is the coldest month in Montclair?

The coldest month in Montclair is December, with an average high-temperature of 62.1°F (16.7°C) and an average low-temperature of 45.5°F (7.5°C).

What is the month with the shortest days in Montclair?

With an average of 9h and 56min of daylight, December has the shortest days of the year in Montclair, California.

When is the lowest UV index in Montclair?

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

Average temperature
Montclair, CA

Average temperature - Montclair, CA

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is December (62.1°F).

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).

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Average pressure
Montclair, CA

Average pressure - Montclair, CA

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed
Montclair, CA

Average wind speed - Montclair, CA

The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity
Montclair, CA

Average humidity - Montclair, CA

The months with the highest relative humidity are March and May (54%).
The month with the lowest relative humidity is August (42%).

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Average rainfall
Montclair, CA

Average rainfall - Montclair, CA

The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Montclair, CA

Average rainfall days - Montclair, CA

The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days
Montclair, CA

Average snowfall days - Montclair, CA

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

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Average daylight / Average sunshine
Montclair, CA

Average daylight / Average sunshine - Montclair, CA

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

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Average sunshine days
Montclair, CA

Average sunshine days - Montclair, CA

The month with the most sunshine days is June (28.2 days).
The month with the least sunshine days is February (21.5 days).

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Average visibility
Montclair, CA

Average visibility - Montclair, CA

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

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