May weather forecastNorco, CA
May
Weather in May
The last month of the spring, May, is a moderately hot month in Norco, California, with an average temperature fluctuating between 54.9°F (12.7°C) and 75.4°F (24.1°C).Temperature
May experiences an average high-temperature of a warm 75.4°F (24.1°C), barely different from April's 72.5°F (22.5°C). An average minimum temperature of 54.9°F (12.7°C) marks the month of May.Humidity
The most humid month in Norco is May, 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 May, the average length of the day in Norco is 13h and 56min.On the first day of the month, sunrise is at 6:00 am and sunset at 7:34 pm. On the last day of May, sunrise is at 5:40 am and sunset at 7:55 pm PDT.
Sunshine
In Norco, California, the average sunshine in May is 11.1h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during May leads to these instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
Average daylight in May /
Average sunshine in May
Norco, CA
- Average daylight in May: 13h and 54min
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 6min
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).
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).
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).
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).
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).
