Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
Hillsborough's average high-temperature in April sits at an enjoyable 61.3°F (16.3°C), showing little difference from the previous month. In Hillsborough, an average nighttime temperature of 49.1°F (9.5°C) is expected during April.Humidity
The average relative humidity in April is 75%.Rainfall
In Hillsborough, in April, it is raining for 8.4 days, with typically 0.67" (17mm) of accumulated precipitation. Throughout the year, in Hillsborough, there are 81.5 rainfall days, and 12.8" (325mm) of precipitation is accumulated.Daylight
The average length of the day in April in Hillsborough is 13h and 12min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:32 pm. On the last day of April, sunrise is at 6:14 am and sunset at 7:59 pm PDT.
Sunshine
In April, the average sunshine is 10.3h.UV index
The average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 during April leads to these advisories:
Take necessary precautions - Defending against sun damage is advocated. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What is the temperature in April in Hillsborough?
What is the average humidity in April in Hillsborough?
How much does it rain in Hillsborough in April?
What is the average length of the day in April in Hillsborough?
When are sunrise and sunset in April in Hillsborough?
How long on average sun shines in April in Hillsborough?
What is the UV index intensity in April in Hillsborough?
Average temperature in April
Hillsborough, CA
- Average high temperature in April: 61.3°F
The warmest month (with the highest average high temperature) is September (70.2°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in April: 49.1°F
The month with the highest average low temperature is September (56.8°F).
The coldest month (with the lowest average low temperature) is January (47.5°F).
Average pressure in April
Hillsborough, CA
- Average pressure in April: 30.04"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in April
Hillsborough, CA
- Average wind speed in April: 8.3mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is September (6.1mph).
Average humidity in April
Hillsborough, CA
- Average humidity in April: 75%
The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (70%).
Average rainfall in April
Hillsborough, CA
- Average rainfall in April: 0.67"
The wettest month (with the highest rainfall) is February (2.44").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in April
Hillsborough, CA
- Average rainfall days in April: 8.4 days
The month with the highest number of rainy days is March (12.8 days).
The months with the least rainy days are June and July (2.4 days).
Average daylight in April /
Average sunshine in April
Hillsborough, CA
- Average daylight in April: 13h and 1min
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 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in April
Hillsborough, CA
- Average sunshine days in April: 20.1 days
The month with the most sunshine days is July (24.6 days).
The month with the least sunshine days is March (16.3 days).
Average UV index in April
Hillsborough, CA
- Average UV index in April: 4
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February and December (UV index 3).
Average cloud cover in April
Hillsborough, CA
- Average cloud cover in April: 28
The month with the most cloud cover is March (Cloud cover 36).
The months with the least cloud cover are July and September (Cloud cover 15).
Average visibility in April
Hillsborough, 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).
Hillsborough, California, USA
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