Rancho Cucamonga
California, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Rancho Cucamonga, CA

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Contents

Weather in January

January, the same as December, is another comfortable winter month in Rancho Cucamonga, California, with average temperature ranging between max 64°F (17.8°C) and min 46.2°F (7.9°C). In Rancho Cucamonga, the average high-temperature is practically the same as in December - a still enjoyable 64°F (17.8°C). Weather in January »

Weather in February

February, the last month of the winter, in Rancho Cucamonga, is another comfortable month, with average temperature fluctuating between 45.3°F (7.4°C) and 64°F (17.8°C). In February, the average high-temperature remains equal 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 a pleasant month in Rancho Cucamonga, California, with average temperature fluctuating between 68.4°F (20.2°C) and 46.9°F (8.3°C). In Rancho Cucamonga, the average high-temperature in March is essentially the same as in February - a pleasant 68.4°F (20.2°C). Weather in March »

Weather in April

April, the same as March, in Rancho Cucamonga, California, is an agreeable spring month, with average temperature ranging between max 72.9°F (22.7°C) and min 50.5°F (10.3°C). In April, the average high-temperature is almost 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 Rancho Cucamonga, California, with temperature in the range of an average high of 76.6°F (24.8°C) and an average low of 53.6°F (12°C). In Rancho Cucamonga, the average high-temperature in May is relatively the same as in April - a warm 76.6°F (24.8°C). Weather in May »

Weather in June

June, the first month of the summer, in Rancho Cucamonga, is still a warm month, with average temperature ranging between max 84.7°F (29.3°C) and min 58.6°F (14.8°C). In Rancho Cucamonga, the average high-temperature marginally rises, from a moderately hot 76.6°F (24.8°C) in May, to a still warm 84.7°F (29.3°C). Weather in June »

Weather in July

July in Rancho Cucamonga, California, is a hot summer month, with average temperature varying between 64.8°F (18.2°C) and 90.5°F (32.5°C). In Rancho Cucamonga, the average high-temperature in July marginally rises, from a warm 84.7°F (29.3°C) in June, to a hot 90.5°F (32.5°C). Weather in July »

Weather in August

August, the last month of the summer, in Rancho Cucamonga, is also a hot month, with temperature in the range of an average low of 66.6°F (19.2°C) and an average high of 91.8°F (33.2°C). The warmest month is August, with an average high-temperature of 91.8°F (33.2°C) and an average low-temperature of 66.6°F (19.2°C). In August, the average heat index is evaluated at a tropical 93.7°F (34.3°C). Weather in August »

Weather in September

September, the first month of the autumn, in Rancho Cucamonga, is also a hot month, with temperature in the range of an average low of 63.7°F (17.6°C) and an average high of 88.3°F (31.3°C). In September, the average high-temperature is relatively the same as in August - a still tropical 88.3°F (31.3°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Rancho Cucamonga, California, with average temperature varying between 79.2°F (26.2°C) and 57.6°F (14.2°C). In Rancho Cucamonga, the average high-temperature decreases, from a hot 88.3°F (31.3°C) in September, to a warm 79.2°F (26.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Rancho Cucamonga, California, with average temperature ranging between max 70.7°F (21.5°C) and min 50.9°F (10.5°C). In Rancho Cucamonga, California, the average high-temperature in November marginally drops, from a moderately hot 79.2°F (26.2°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 Rancho Cucamonga, California, with temperature in the range of an average low of 45.3°F (7.4°C) and an average high of 61.7°F (16.5°C). December is the coldest month, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 45.3°F (7.4°C). Weather in December »

FAQ

How many days does it rain in Rancho Cucamonga?

Throughout the year, there are 42.3 rainfall days, and 4.53" (115mm) of precipitation is accumulated.

How many days does it snow in Rancho Cucamonga?

Throughout the year, there are 0.1 snowfall days.

When it does not snow in Rancho Cucamonga?

January, March through December are months without snowfall in Rancho Cucamonga.

What is the most humid month in Rancho Cucamonga?

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

What is the rainiest month in Rancho Cucamonga?

The month with the most rainfall in Rancho Cucamonga, California, is February when the rain falls for 4.5 days and typically aggregates up to 0.98" (25mm) of precipitation.

When does it snow in Rancho Cucamonga?

The only month with snowfall is February.

When does it snow the most in Rancho Cucamonga?

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

What is the month with the least sunshine in Rancho Cucamonga?

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

What is the driest month in Rancho Cucamonga?

The month with the least rainfall is June when the rain falls for 0.9 days and typically collects 0.04" (1mm) of precipitation.

When are the longest days in Rancho Cucamonga?

The month with the longest days in Rancho Cucamonga, California, is June, with an average of 14.4h of daylight.

What month has the most sunshine in Rancho Cucamonga?

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

What are the months with the highest UV index in Rancho Cucamonga?

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

What is the warmest month in Rancho Cucamonga?

With an average high-temperature of 91.8°F (33.2°C) and an average low-temperature of 66.6°F (19.2°C), August is the warmest month in Rancho Cucamonga, California.

What is the least humid month in Rancho Cucamonga?

With an average relative humidity of 41%, August is the least humid month.

What is the coldest month in Rancho Cucamonga?

With an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 45.3°F (7.4°C), December is the coldest month.

What is the month with the shortest days in Rancho Cucamonga?

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

When is the lowest UV index in Rancho Cucamonga?

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

Average temperature
Rancho Cucamonga, CA

Average temperature - Rancho Cucamonga, CA

The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).

Average humidity
Rancho Cucamonga, CA

Average humidity - Rancho Cucamonga, CA

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

Average rainfall
Rancho Cucamonga, CA

Average rainfall - Rancho Cucamonga, CA

The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days
Rancho Cucamonga, CA

Average rainfall days - Rancho Cucamonga, CA

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).

Average snowfall days
Rancho Cucamonga, CA

Average snowfall days - Rancho Cucamonga, 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).

Average daylight / Average sunshine
Rancho Cucamonga, CA

Average daylight / Average sunshine - Rancho Cucamonga, 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).

Average UV index
Rancho Cucamonga, CA

Average UV index - Rancho Cucamonga, CA

Months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).