May weather forecast
Signal Hill, CA

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Weather in May

The last month of the spring, May, is also an agreeable month in Signal Hill, California, with temperature in the range of an average high of 70°F (21.1°C) and an average low of 57°F (13.9°C).

Temperature

Signal Hill starts May with an average high-temperature of a still agreeable 70°F (21.1°C), hinting at a minimal fluctuation from April. May witnesses an average nighttime temperature of 57°F (13.9°C).

Humidity

In Signal Hill, the average relative humidity in May is 67%.

Rainfall

In May, in Signal Hill, California, the rain falls for 3.4 days. Throughout May, 0.16" (4mm) of precipitation is accumulated. Throughout the year, in Signal Hill, there are 47.2 rainfall days, and 5.59" (142mm) of precipitation is accumulated.

Daylight

In Signal Hill, California, the average length of the day in May 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 7:58 pm PDT.

Sunshine

In Signal Hill, the average sunshine in May is 11.2h.

UV index

In Signal Hill, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 5 in May leads to these recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Frequently asked questions

What are May temperatures in Signal Hill?

The high-temperature, in May, in Signal Hill, is 70°F (21.1°C), while the low-temperature averages to 57°F (13.9°C).

What is the average humidity in May in Signal Hill?

In May, the average relative humidity is 67%.

How much does it rain in Signal Hill in May?

In Signal Hill, in May, during 3.4 rainfall days, 0.16" (4mm) of precipitation is typically accumulated.

What is the average length of the day in May in Signal Hill?

In May, the average day length in Signal Hill is 13h and 56min.

When is the sunrise / sunset in May in Signal Hill?

On the first day of May in Signal Hill, California, 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 7:58 pm PDT.

How many hours of sunshine does Signal Hill have in May?

In Signal Hill, the average sunshine duration in May is 11.2h.

How high is the UV index in May in Signal Hill?

The average daily maximum UV index in May in Signal Hill, California, is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's 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
Signal Hill, CA

Average temperature in May - Signal Hill, CA
  • Average high temperature in May: 70°F

The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is December (63.5°F).

  • Average low temperature in May: 57°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (52°F).

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Average pressure in May
Signal Hill, CA

Average pressure in May - Signal Hill, 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
Signal Hill, CA

Average wind speed in May - Signal Hill, CA
  • Average wind speed in May: 6.2mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (5mph).

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Average humidity in May
Signal Hill, CA

Average humidity in May - Signal Hill, CA
  • Average humidity in May: 67%

The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (55%).

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Average rainfall in May
Signal Hill, CA

Average rainfall in May - Signal Hill, CA
  • Average rainfall in May: 0.16"

The wettest month (with the highest rainfall) is December (1.14").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in May
Signal Hill, CA

Average rainfall days in May - Signal Hill, CA
  • Average rainfall days in May: 3.4 days

The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is June (1.8 days).

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Average daylight in May /
Average sunshine in May
Signal Hill, CA

Average daylight in May / Average sunshine in May - Signal Hill, 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: 10h and 0min).

  • Average sunshine in May: 11h and 1min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).

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Average sunshine days in May
Signal Hill, CA

Average sunshine days in May - Signal Hill, CA
  • Average sunshine days in May: 23 days

The month with the most sunshine days is January (25.7 days).
The month with the least sunshine days is June (20.8 days).

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Average UV index in May
Signal Hill, CA

Average UV index in May - Signal Hill, 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 January, February, November and December (UV index 4).

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Average cloud cover in May
Signal Hill, CA

Average cloud cover in May - Signal Hill, CA
  • Average cloud cover in May: 18

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 7).

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Average visibility in May
Signal Hill, CA

Average visibility in May - Signal Hill, 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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Signal Hill, California, USA

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