Monthly weather forecast and climate
Alta Loma, CA

Weather in January

January, like December, in Alta Loma, California, is another enjoyable winter month, with average temperature fluctuating between 63.9°F (17.7°C) and 46°F (7.8°C). In January, the average high-temperature is practically the same as in December - a still comfortable 63.9°F (17.7°C). Weather in January »

Weather in February

The last month of the winter, February, is also an enjoyable month in Alta Loma, California, with average temperature fluctuating between 63.9°F (17.7°C) and 45.1°F (7.3°C). In Alta Loma, California, the average high-temperature in February remains equal as in January - a still enjoyable 63.9°F (17.7°C). Weather in February »

Weather in March

The first month of the spring, March, is still a comfortable month in Alta Loma, California, with temperature in the range of an average high of 67.8°F (19.9°C) and an average low of 46.6°F (8.1°C). In Alta Loma, the average high-temperature is almost the same as in February - a still enjoyable 67.8°F (19.9°C). Weather in March »

Weather in April

April is a pleasant spring month in Alta Loma, California, with average temperature varying between 72.9°F (22.7°C) and 50.2°F (10.1°C). In April, the average high-temperature is essentially the same as in March - a 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 Alta Loma, California, with average temperature varying between 76.6°F (24.8°C) and 53.2°F (11.8°C). In Alta Loma, California, the average high-temperature 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 Alta Loma, California, with average temperature fluctuating between 58.3°F (14.6°C) and 84.7°F (29.3°C). In Alta Loma, the average high-temperature in June slightly increases, from a warm 76.6°F (24.8°C) in May, to a still moderately hot 84.7°F (29.3°C). Weather in June »

Weather in July

July in Alta Loma, California, is a tropical summer month, with average temperature varying between 90.3°F (32.4°C) and 64.8°F (18.2°C). In July, the average high-temperature slightly increases, from a moderately hot 84.7°F (29.3°C) in June, to a tropical 90.3°F (32.4°C). Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Alta Loma, California, with average temperature varying between 66.7°F (19.3°C) and 91.2°F (32.9°C). With an average high-temperature of 91.2°F (32.9°C) and an average low-temperature of 66.7°F (19.3°C), August is the warmest month. In August, the average heat index is evaluated at a hot 92.8°F (33.8°C). Weather in August »

Weather in September

September, the first month of the autumn, in Alta Loma, is still a hot month, with average temperature ranging between max 88.3°F (31.3°C) and min 63.9°F (17.7°C). In September, the average high-temperature is almost the same as in August - a still hot 88.3°F (31.3°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Alta Loma, California, with average temperature fluctuating between 78.8°F (26°C) and 57.4°F (14.1°C). In October, the average high-temperature decreases, from a tropical 88.3°F (31.3°C) in September, to a warm 78.8°F (26°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Alta Loma, California, with average temperature fluctuating between 50.9°F (10.5°C) and 70.7°F (21.5°C). In November, the average high-temperature marginally drops, from a warm 78.8°F (26°C) in October, to a pleasant 70.7°F (21.5°C). Weather in November »

Weather in December

December, the first month of the winter, in Alta Loma, is also an enjoyable month, with average temperature ranging between max 61.3°F (16.3°C) and min 45.3°F (7.4°C). With an average high-temperature of 61.3°F (16.3°C) and an average low-temperature of 45.3°F (7.4°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Alta Loma?

In Alta Loma, during the entire year, the rain falls for 50.5 days and collects up to 7.56" (192mm) of precipitation.

What are the most humid months in Alta Loma?

Months with the highest humidity are February, March and May, with an average relative humidity of 53%.

What is the rainiest month in Alta Loma?

The month with the most rainfall in Alta Loma is February when the rain falls for 6 days and typically aggregates up to 1.73" (44mm) of precipitation.

What is the month with the least sunshine in Alta Loma?

The month with the least sunshine is February, with an average of 6.9h of sunshine.

What is the driest month in Alta Loma?

June is the month with the least rainfall in Alta Loma. Rain falls for 1.2 days and accumulates 0.04" (1mm) of precipitation.

When are the longest days in Alta Loma?

The month with the longest days in Alta Loma is June, with an average of 14.4h of daylight.

What month has the most sunshine in Alta Loma?

July has the most sunshine of the year in Alta Loma, with an average of 12.1h of sunshine.

When is the highest UV index in Alta Loma?

Months with the highest UV index in Alta Loma are July and August, with an average maximum UV index of 7.

What is the warmest month in Alta Loma?

With an average high-temperature of 91.2°F (32.9°C) and an average low-temperature of 66.7°F (19.3°C), August is the warmest month.

What is the least humid month in Alta Loma?

August is the least humid month in Alta Loma, with an average relative humidity of 41%.

What is the coldest month in Alta Loma?

December is the coldest month, with an average high-temperature of 61.3°F (16.3°C) and an average low-temperature of 45.3°F (7.4°C).

What is the month with the shortest days in Alta Loma?

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

What is the month with the lowest UV index in Alta Loma?

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

Average temperature
Alta Loma, CA

Average temperature - Alta Loma, CA

The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is December (61.3°F).

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is February (45.1°F).

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Average pressure
Alta Loma, CA

Average pressure - Alta Loma, 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
Alta Loma, CA

Average wind speed - Alta Loma, CA

The windiest months (with the highest average wind speed) are April and May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity
Alta Loma, CA

Average humidity - Alta Loma, CA

Months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).

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Average rainfall
Alta Loma, CA

Average rainfall - Alta Loma, CA

The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Alta Loma, CA

Average rainfall days - Alta Loma, CA

The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).

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Average daylight / Average sunshine
Alta Loma, CA

Average daylight / Average sunshine - Alta Loma, 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).
The month with the least sunshine is February (Average sunshine: 6.9h).

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Average sunshine days
Alta Loma, CA

Average sunshine days - Alta Loma, CA

The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (21.4 days).

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Average visibility
Alta Loma, CA

Average visibility - Alta Loma, 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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