Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The average high-temperature during May registers at a still pleasant 70°F (21.1°C), maintaining a close resemblance to the previous month. May brings with it a nighttime average temperature of 57°F (13.9°C).Humidity
In May, the average relative humidity is 67%.Rainfall
In Signal Hill, California, in May, it is raining for 3.4 days, with typically 0.16" (4mm) of accumulated precipitation. In Signal Hill, during the entire year, the rain falls for 47.2 days and collects up to 5.59" (142mm) of precipitation.Daylight
In May, the average length of the day 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 7:58 pm PDT.
Sunshine
In May, the average sunshine is 11.2h.UV index
In Signal Hill, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
How much does it rain in Signal Hill in May?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
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).
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).
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).
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%).
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").
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).
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).
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).
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).
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).
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).
Signal Hill, California, USA
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