Monthly weather forecast and climate
Norco, CA

Weather in January

January, the same as December, is another enjoyable winter month in Norco, California, with average temperature ranging between max 66.2°F (19°C) and min 48°F (8.9°C). In January, the average high-temperature is essentially the same as in December - a still enjoyable 66.2°F (19°C). Weather in January »

Weather in February

The last month of the winter, February, is also an enjoyable month in Norco, California, with average temperature varying between 47.1°F (8.4°C) and 65.3°F (18.5°C). In Norco, the average high-temperature is almost the same as in January - a still comfortable 65.3°F (18.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a pleasant month in Norco, California, with temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 68.9°F (20.5°C). In March, the average high-temperature is relatively the same as in February - an agreeable 68.9°F (20.5°C). Weather in March »

Weather in April

April, like March, is an agreeable spring month in Norco, California, with temperature in the range of an average low of 51.3°F (10.7°C) and an average high of 72.5°F (22.5°C). In Norco, the average high-temperature in April is relatively the same as in March - a still pleasant 72.5°F (22.5°C). Weather in April »

Weather in May

May, the last month of the spring, in Norco, is a warm month, with temperature in the range of an average high of 75.4°F (24.1°C) and an average low of 54.9°F (12.7°C). In May, the average high-temperature is relatively the same as in April - a warm 75.4°F (24.1°C). Weather in May »

Weather in June

The first month of the summer, June, is also a moderately hot month in Norco, California, with average temperature ranging between max 82°F (27.8°C) and min 58.6°F (14.8°C). In Norco, the average high-temperature marginally rises, from a moderately hot 75.4°F (24.1°C) in May, to a still warm 82°F (27.8°C). Weather in June »

Weather in July

July in Norco, California, is a tropical summer month, with average temperature fluctuating between 64.2°F (17.9°C) and 88°F (31.1°C). In Norco, the average high-temperature in July marginally rises, from a moderately hot 82°F (27.8°C) in June, to a tropical 88°F (31.1°C). Weather in July »

Weather in August

August, the last month of the summer, in Norco, is also a hot month, with average temperature ranging between min 65.8°F (18.8°C) and max 89.4°F (31.9°C). With an average high-temperature of 89.4°F (31.9°C) and an average low-temperature of 65.8°F (18.8°C), August is the warmest month. In August, the average heat index is appraised at 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 Norco, California, with temperature in the range of an average high of 86.9°F (30.5°C) and an average low of 63.5°F (17.5°C). In Norco, California, the average high-temperature is practically the same as in August - a still hot 86.9°F (30.5°C). Weather in September »

Weather in October

October, like September, in Norco, California, is another warm autumn month, with temperature in the range of an average low of 58.8°F (14.9°C) and an average high of 79.5°F (26.4°C). In Norco, California, the average high-temperature slightly decreases, from a tropical 86.9°F (30.5°C) in September, to a warm 79.5°F (26.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is another pleasant month in Norco, California, with temperature in the range of an average high of 71.8°F (22.1°C) and an average low of 52.5°F (11.4°C). In November, the average high-temperature marginally drops, from a warm 79.5°F (26.4°C) in October, to an agreeable 71.8°F (22.1°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Norco, California, with average temperature ranging between min 46.9°F (8.3°C) and max 63.5°F (17.5°C). With an average high-temperature of 63.5°F (17.5°C) and an average low-temperature of 46.9°F (8.3°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Norco?

Throughout the year, there are 53.9 rainfall days, and 8.86" (225mm) of precipitation is accumulated.

When is the lowest UV index in Norco?

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 Norco?

With an average relative humidity of 60%, May is the most humid month in Norco, California.

What is the driest month in Norco?

June is the month with the least rainfall in Norco, California. Rain falls for 1.3 days and accumulates 0.04" (1mm) of precipitation.

When are the longest days in Norco?

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

What is the month with the most sunshine in Norco?

Months with the most sunshine are July and August, with an average of 12.1h of sunshine.

When is the highest UV index in Norco?

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

What is the warmest month in Norco?

The warmest month is August, with an average high-temperature of 89.4°F (31.9°C) and an average low-temperature of 65.8°F (18.8°C).

What is the least humid month in Norco?

The least humid month is November, with an average relative humidity of 48%.

What is the coldest month in Norco?

December is the coldest month, with an average high-temperature of 63.5°F (17.5°C) and an average low-temperature of 46.9°F (8.3°C).

What is the rainiest month in Norco?

The month with the most rainfall is December when the rain falls for 6.5 days and typically aggregates up to 1.89" (48mm) of precipitation.

What is the month with the shortest days in Norco?

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

What is the month with the least sunshine in Norco?

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

Average temperature
Norco, CA

Average temperature - Norco, CA

The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is December (63.5°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 (46.9°F).

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Average pressure
Norco, CA

Average pressure - Norco, CA

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed
Norco, CA

Average wind speed - Norco, CA

The windiest months (with the highest average wind speed) are April and May (5.4mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).

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Average rainfall
Norco, CA

Average rainfall - Norco, CA

The wettest month (with the highest rainfall) is December (1.89").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Norco, CA

Average rainfall days - Norco, CA

The month with the highest number of rainy days is March (8.2 days).
The month with the least rainy days is June (1.3 days).

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Average daylight / Average sunshine
Norco, CA

Average daylight / Average sunshine - Norco, 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: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days
Norco, CA

Average sunshine days - Norco, CA

The month with the most sunshine days is June (27.1 days).
The month with the least sunshine days is February (20.8 days).

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Average UV index
Norco, CA

Average UV index - Norco, CA

Months with the highest UV index are July and August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average visibility
Norco, CA

Average visibility - Norco, 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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