Monthly weather forecast and climate
Montclair, CA

Weather in January

January, the same as December, is another enjoyable winter month in Montclair, California, with 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 enjoyable 64.6°F (18.1°C). Weather in January »

Weather in February

February, the last month of the winter, in Montclair, is another comfortable month, with average temperature varying between 45.7°F (7.6°C) and 64°F (17.8°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

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

Weather in April

April, like March, is an agreeable spring month in Montclair, California, with temperature in the range of an average high of 72.9°F (22.7°C) and an average low of 50.2°F (10.1°C). In April, the average high-temperature is relatively the same as in March - a still pleasant 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 average temperature varying between 76.6°F (24.8°C) and 53.6°F (12°C). In May, the average high-temperature is essentially 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 still a warm month in Montclair, California, with temperature in the range of an average low of 58.5°F (14.7°C) and an average high of 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 warm 84°F (28.9°C). Weather in June »

Weather in July

July in Montclair, California, is a hot summer month, with average temperature varying between 64.8°F (18.2°C) and 90°F (32.2°C). In Montclair, the average high-temperature 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 average temperature varying between 65.8°F (18.8°C) and 91°F (32.8°C). With an average high-temperature of 91°F (32.8°C) and an average low-temperature of 65.8°F (18.8°C), August is the warmest month. The average heat index in August is calculated to a hot 93°F (33.9°C). Weather in August »

Weather in September

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

Weather in October

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

Weather in November

November, the last month of the autumn, in Montclair, is also an agreeable month, with average temperature fluctuating between 70.7°F (21.5°C) and 50.9°F (10.5°C). In Montclair, the average high-temperature slightly decreases, from a moderately hot 79°F (26.1°C) in October, to an agreeable 70.7°F (21.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Montclair, California, with 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?

In Montclair, California, during the entire year, the rain falls for 49.6 days and collects up to 7.8" (198mm) of precipitation.

How many days does it snow in Montclair?

In Montclair, California, during the entire year, snow falls for 0.1 days.

When it does not snow in Montclair?

January, March through December are months without snowfall.

What is the rainiest month in Montclair?

February is the month with the most rainfall. Rain falls for 6 days and accumulates 1.77" (45mm) of precipitation.

When does it snow in Montclair?

February is the only month when snow falls.

What is the snowiest month in Montclair?

February has the most snowfall days of the year. Snow falls for 0.1 days.

What is the month with the least sunshine in Montclair?

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

What are the most humid months in Montclair?

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

What is the driest month in Montclair?

The month with the least rainfall 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?

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

What month has the most sunshine in Montclair?

The month with the most sunshine in Montclair, California, is July, with an average of 12.1h of sunshine.

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

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

What is the warmest month in Montclair?

August is the warmest month in Montclair, 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?

With an average relative humidity of 42%, August is the least humid month in Montclair, California.

What is the coldest month in Montclair?

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).

What is the month with the shortest days in Montclair?

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

When is the lowest UV index in Montclair?

With an average maximum UV index of 3, December is the month with the lowest UV index.

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").
The month with the lowest atmospheric pressure is June (29.86").

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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

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

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.9).

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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

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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