May weather forecastNorwalk, CA
May
Weather in May
Weather in May stays consistent with the pleasantness of spring, with a continued rise in temperature and more daylight hours. The highest average temperature in May soars to 72.5°F (22.5°C), a marked increase from April, signaling that summer is approaching. Cloud coverage is at its lowest for the year, resulting in clear skies and maximum sunshine hours. May boasts almost 14 hours of sunlight each day, making it the perfect weather for picnics and other outdoor adventures. Concurrently, with minimal rainfall, the region presents a dry and inviting atmosphere, consistent with the onset of summer.Temperature
Norwalk experiences a transition to a still pleasant 72.5°F (22.5°C) in average high-temperatures with the arrival of May, not greatly differing from April's 71.1°F (21.7°C). During May, Norwalk's temperature averages to a mild 57°F (13.9°C) at night.Humidity
In May, the average relative humidity is 63%.Rainfall
In Norwalk, in May, during 3.6 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. In Norwalk, during the entire year, the rain falls for 49.5 days and collects up to 7.05" (179mm) of precipitation.Daylight
The average length of the day in May is 13h and 56min.On the first day of the month, sunrise is at 6:02 am and sunset at 7:36 pm. On the last day of May, sunrise is at 5:42 am and sunset at 7:57 pm PDT.
Sunshine
In Norwalk, the average sunshine in May is 11.2h.UV index
In May, the average daily maximum UV index in Norwalk, California, is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In May, the maximum UV index of 5 suggests this advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Norwalk, CA
- Average high temperature in May: 72.5°F
The warmest month (with the highest average high temperature) is August (83.1°F).
The month with the lowest average high temperature is December (64.6°F).
- Average low temperature in May: 57°F
The month with the highest average low temperature is August (65.7°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).
Average pressure in May
Norwalk, CA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in May
Norwalk, CA
- Average wind speed in May: 5.9mph
The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is October (4.7mph).
Average humidity in May
Norwalk, CA
- Average humidity in May: 63%
The month with the highest relative humidity is June (66%).
The month with the lowest relative humidity is November (51%).
Average rainfall in May
Norwalk, CA
- Average rainfall in May: 0.2"
The wettest month (with the highest rainfall) is December (1.46").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in May
Norwalk, CA
- Average rainfall days in May: 3.6 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.2 days).
Average daylight in May /
Average sunshine in May
Norwalk, 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 12min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in May
Norwalk, CA
- Average sunshine days in May: 23.8 days
The months with the most sunshine days are January and August (25.6 days).
The month with the least sunshine days is February (21.1 days).
Average UV index in May
Norwalk, CA
- Average UV index in May: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are February, November and December (UV index 4).
Average cloud cover in May
Norwalk, CA
- Average cloud cover in May: 17
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in May
Norwalk, 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).
