April weather forecastUnion City, CA
April
Weather in April
April, the same as March, is another comfortable spring month in Union City, California, with an average temperature varying between 46.6°F (8.1°C) and 65.8°F (18.8°C).Temperature
Union City experiences an average high-temperature of a still comfortable 65.8°F (18.8°C) with the onset of April, subtly varied from March's 62.2°F (16.8°C). Union City's average low-temperature is measured at a chilly 46.6°F (8.1°C) during April.Humidity
In Union City, the average relative humidity in April is 70%.Rainfall
In Union City, in April, it is raining for 4.7 days, with typically 0.12" (3mm) of accumulated precipitation. In Union City, during the entire year, the rain falls for 38 days and collects up to 2.13" (54mm) of precipitation.Daylight
In April, the average length of the day is 13h and 12min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:31 pm. On the last day of April, sunrise is at 6:12 am and sunset at 7:57 pm PDT.
Sunshine
In April, the average sunshine is 10.5h.UV index
In Union City, the average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In April, the maximum UV index of 5 transforms into these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Union City, CA
- Average high temperature in April: 65.8°F
The warmest months (with the highest average high temperature) are July and August (80.1°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in April: 46.6°F
The months with the highest average low temperature are August and September (56.7°F).
The coldest month (with the lowest average low temperature) is December (43.7°F).
Average pressure in April
Union City, CA
- Average pressure in April: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in April
Union City, CA
- Average wind speed in April: 6.2mph
The windiest month (with the highest average wind speed) is May (6.4mph).
The calmest months (with the lowest average wind speed) are October and November (4.7mph).
Average humidity in April
Union City, CA
- Average humidity in April: 70%
The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are September and October (62%).
Average rainfall in April
Union City, CA
- Average rainfall in April: 0.12"
The wettest month (with the highest rainfall) is February (0.47").
The driest months (with the least rainfall) are June, July and August (0").
Average rainfall days in April
Union City, CA
- Average rainfall days in April: 4.7 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is July (0.3 days).
Average daylight in April /
Average sunshine in April
Union City, CA
- Average daylight in April: 13h and 12min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 10h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in April
Union City, CA
- Average sunshine days in April: 24.8 days
The months with the most sunshine days are July and August (30.4 days).
The month with the least sunshine days is February (22.2 days).
Average UV index in April
Union City, CA
- Average UV index in April: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in April
Union City, CA
- Average cloud cover in April: 26
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in April
Union City, 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).
