May weather forecast
Norwalk, CA

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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

In May, Norwalk experiences a minor shift in meteorological conditions with average high-temperatures marked at a still agreeable 72.5°F (22.5°C), closely mirroring the climate in April. Nighttime temperatures in May average to a mild 57°F (13.9°C) in Norwalk.

Humidity

In May, the average relative humidity is 63%.

Rainfall

In Norwalk, California, during May, the rain falls for 3.6 days and regularly aggregates up to 0.2" (5mm) of precipitation. Throughout the year, in Norwalk, California, there are 49.5 rainfall days, and 7.05" (179mm) of precipitation is accumulated.

Daylight

In May, the average length of the day in Norwalk, California, is 13h and 56min.
On the first day of May, sunrise is at 6:02 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 7:57 pm PDT.

Sunshine

In May, the average sunshine in Norwalk is 11.2h.

UV index

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In May, a daily maximum UV index of 5 leads to the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What are May temperatures in Norwalk?

The high-temperature, in May, in Norwalk, records 72.5°F (22.5°C), while the low-temperature is 57°F (13.9°C).

What is the average humidity in May in Norwalk?

In May, the average relative humidity in Norwalk, California, is 63%.

How much does it rain in Norwalk in May?

In Norwalk, California, in May, during 3.6 rainfall days, 0.2" (5mm) of precipitation is typically accumulated.

How many hours of daylight does Norwalk have in May?

The average day length in May in Norwalk is 13h and 56min.

When are sunrise and sunset in May in Norwalk?

On the first day of May in Norwalk, sunrise is at 6:02 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 7:57 pm PDT.

How long on average sun shines in May in Norwalk?

The average sunshine duration in May in Norwalk is 11.2h.

What is the UV index intensity in May in Norwalk?

In May, the average daily maximum UV index in Norwalk, California, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Norwalk, CA

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).

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Average pressure in May
Norwalk, CA

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).

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Average wind speed in May
Norwalk, CA

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).

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Average humidity in May
Norwalk, CA

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%).

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Average rainfall in May
Norwalk, CA

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").

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Average rainfall days in May
Norwalk, CA

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).

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Average daylight in May /
Average sunshine in May
Norwalk, CA

Average daylight in May / Average sunshine in May - Norwalk, 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 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in May
Norwalk, CA

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).

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Average UV index in May
Norwalk, CA

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).

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Average cloud cover in May
Norwalk, CA

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).

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Average visibility in May
Norwalk, CA

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).

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Norwalk, California, USA

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