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
The commencement of April sees a minor shift in the average high-temperature, moving from 61.3°F (16.3°C) in March to a still comfortable 67.1°F (19.5°C). Throughout April nights, Napa Junction experiences a consistent temperature average of 46°F (7.8°C).Humidity
In Napa Junction, California, the average relative humidity in April is 69%.Rainfall
In Napa Junction, in April, it is raining for 7.3 days, with typically 0.67" (17mm) of accumulated precipitation. In Napa Junction, during the entire year, the rain falls for 68.2 days and collects up to 11.93" (303mm) of precipitation.Daylight
The average length of the day in April in Napa Junction, California, is 13h and 13min.On the first day of April, sunrise is at 6:52 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 7:59 pm PDT.
Sunshine
The average sunshine in April in Napa Junction, California, is 10.2h.UV index
In Napa Junction, the average daily maximum UV index in April 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 average individuals.Note: A daily high UV index of 5 in April leads to these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature in Napa Junction?
What is the average humidity in April in Napa Junction?
How many days does it rain in April in Napa Junction?
How many hours of daylight does Napa Junction have in April?
What time are sunrise and sunset in April in Napa Junction?
How long on average sun shines in April in Napa Junction?
What is the UV index intensity in April in Napa Junction?
Average temperature in April
Napa Junction, CA
- Average high temperature in April: 67.1°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is December (54.9°F).
- Average low temperature in April: 46°F
The month with the highest average low temperature is August (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (42.3°F).
Average pressure in April
Napa Junction, 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
Napa Junction, CA
- Average wind speed in April: 6.2mph
The windiest month (with the highest average wind speed) is May (6.6mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in April
Napa Junction, CA
- Average humidity in April: 69%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (58%).
Average rainfall in April
Napa Junction, CA
- Average rainfall in April: 0.67"
The wettest month (with the highest rainfall) is February (2.32").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in April
Napa Junction, CA
- Average rainfall days in April: 7.3 days
The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is August (0.9 days).
Average daylight in April /
Average sunshine in April
Napa Junction, CA
- Average daylight in April: 13h and 1min
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 1min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in April
Napa Junction, CA
- Average sunshine days in April: 21.8 days
The months with the most sunshine days are July and August (29.1 days).
The month with the least sunshine days is March (18.3 days).
Average UV index in April
Napa Junction, CA
- Average UV index in April: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in April
Napa Junction, CA
- Average cloud cover in April: 28
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in April
Napa Junction, 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).
Napa Junction, California, USA
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