April weather forecastSignal Hill, CA
April
Weather in April
April is an agreeable spring month in Signal Hill, California, with an average temperature ranging between max 68.5°F (20.3°C) and min 55°F (12.8°C).Temperature
Signal Hill's weather in April, with an average high-temperature of a pleasant 68.5°F (20.3°C), subtly shifts from March's 66.4°F (19.1°C). In April, the temperature in Signal Hill drops to an average of 55°F (12.8°C) at night.Humidity
In April, the average relative humidity is 64%.Rainfall
In April, in Signal Hill, the rain falls for 4.8 days. Throughout April, 0.31" (8mm) of precipitation is accumulated. 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 Signal Hill, the average length of the day in April is 13h and 3min.On the first day of April, sunrise is at 6:38 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 7:35 pm PDT.
Sunshine
In Signal Hill, the average sunshine in April is 11h.UV index
In April, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In April, a daily UV index of 5 turns into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Signal Hill, CA
- Average high temperature in April: 68.5°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 April: 55°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 April
Signal Hill, CA
- Average pressure in April: 29.97"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 April
Signal Hill, CA
- Average wind speed in April: 6.5mph
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 April
Signal Hill, CA
- Average humidity in April: 64%
The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (55%).
Average rainfall in April
Signal Hill, CA
- Average rainfall in April: 0.31"
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 April
Signal Hill, CA
- Average rainfall days in April: 4.8 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 April /
Average sunshine in April
Signal Hill, CA
- Average daylight in April: 13h and 6min
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 April: 11h and 0min
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 April
Signal Hill, CA
- Average sunshine days in April: 24.4 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 April
Signal Hill, CA
- Average UV index in April: 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 April
Signal Hill, CA
- Average cloud cover in April: 19
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 April
Signal Hill, CA
- Average visibility in April: 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).
