May weather forecast
Norco, CA

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Weather in May

May, the last month of the spring in Norco, is a moderately hot month, with an average temperature fluctuating between 54.9°F (12.7°C) and 75.4°F (24.1°C).

Temperature

Norco ushers in May with an average high-temperature of a warm 75.4°F (24.1°C), showing a close resemblance to the previous month. Norco, in May, experiences an average temperature of 54.9°F (12.7°C) at night.

Humidity

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

Rainfall

In Norco, in May, during 4.5 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. Throughout the year, there are 53.9 rainfall days, and 8.86" (225mm) of precipitation is accumulated.

Daylight

In Norco, California, the average length of the day in May is 13h and 56min.
On the first day of May, sunrise is at 6:00 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 7:55 pm PDT.

Sunshine

The average sunshine in May is 11.1h.

UV index

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: During May, 5 as the daily maximum UV index converts into the following advice:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What are May temperatures in Norco?

May temperatures in Norco vary between a high-temperature of 75.4°F (24.1°C) and a low-temperature of 54.9°F (12.7°C).

What is the most humid month in Norco?

The most humid month in Norco is May, with an average relative humidity of 60%.

What is the average humidity in May in Norco?

In May, the average relative humidity is 60%.

How many days does it rain in May in Norco?

In Norco, during May, the rain falls for 4.5 days and regularly aggregates up to 0.35" (9mm) of precipitation.

What is the average length of the day in May in Norco?

In Norco, California, the average day length in May is 13h and 56min.

When is the sunrise / sunset in May in Norco?

In May, on the first day of the month, sunrise is at 6:00 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 7:55 pm PDT.

How many hours of sunshine does Norco have in May?

In May, the average sunshine duration in Norco, California, is 11.1h.

What is the UV index reading in May in Norco?

In May, the average daily maximum UV index in Norco, California, is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Norco, CA

Average temperature in May - Norco, CA
  • Average high temperature in May: 75.4°F

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).

  • Average low temperature in May: 54.9°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 in May
Norco, CA

Average pressure in May - Norco, CA
  • Average pressure in May: 29.91"Hg

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

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Average wind speed in May
Norco, CA

Average wind speed in May - Norco, CA
  • Average wind speed in May: 5.4mph

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 humidity in May
Norco, CA

Average humidity in May - Norco, CA
  • Average humidity in May: 60%

The month with the highest relative humidity is May (60%).
The month with the lowest relative humidity is November (48%).

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Average rainfall in May
Norco, CA

Average rainfall in May - Norco, CA
  • Average rainfall in May: 0.35"

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 in May
Norco, CA

Average rainfall days in May - Norco, CA
  • Average rainfall days in May: 4.5 days

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 in May /
Average sunshine in May
Norco, CA

Average daylight in May / Average sunshine in May - Norco, CA
  • Average daylight in May: 13h and 5min

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).

  • Average sunshine in May: 11h and 1min

The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in May
Norco, CA

Average sunshine days in May - Norco, CA
  • Average sunshine days in May: 23.9 days

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 in May
Norco, CA

Average UV index in May - Norco, CA
  • Average UV index in May: 5

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

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Average cloud cover in May
Norco, CA

Average cloud cover in May - Norco, CA
  • Average cloud cover in May: 18

The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in May
Norco, CA

Average visibility in May - Norco, CA
  • Average visibility in May: 6mi

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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Norco, California, USA

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