April weather forecastPort Costa, CA
April
Weather in April
April, the same as March, is another comfortable spring month in Port Costa, California, with temperature in the range of an average high of 66.7°F (19.3°C) and an average low of 46.8°F (8.2°C).Temperature
Port Costa experiences a minor change to a still refreshing 66.7°F (19.3°C) in average high-temperature during April, closely reflecting March. The low-temperature average for Port Costa during April stands at a frosty 46.8°F (8.2°C).Humidity
In Port Costa, the average relative humidity in April is 69%.Rainfall
In Port Costa, in April, during 5.8 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. In Port Costa, during the entire year, the rain falls for 56.9 days and collects up to 4.88" (124mm) of precipitation.Daylight
In April, the average length of the day is 13h and 13min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:32 pm. On the last day of April, sunrise is at 6:12 am and sunset at 7:59 pm PDT.
Sunshine
The average sunshine in April is 10.3h.UV index
The average daily maximum UV index in April in Port Costa is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: In April, the UV index of 5 transforms into the following advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Port Costa, CA
- Average high temperature in April: 66.7°F
The warmest months (with the highest average high temperature) are July and September (80.1°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in April: 46.8°F
The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is January (43°F).
Average pressure in April
Port Costa, CA
- Average pressure in April: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Port Costa, CA
- Average wind speed in April: 6.5mph
The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity in April
Port Costa, CA
- Average humidity in April: 69%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (60%).
Average rainfall in April
Port Costa, CA
- Average rainfall in April: 0.2"
The wettest month (with the highest rainfall) is February (1.14").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in April
Port Costa, CA
- Average rainfall days in April: 5.8 days
The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.9 days).
Average daylight in April /
Average sunshine in April
Port Costa, CA
- Average daylight in April: 13h and 12min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 10h and 18min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in April
Port Costa, CA
- Average sunshine days in April: 22.8 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (18.8 days).
Average UV index in April
Port Costa, CA
- Average UV index in April: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in April
Port Costa, CA
- Average cloud cover in April: 27
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in April
Port Costa, 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).
