April weather forecast
Yountville, CA

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Weather in April

April is a pleasant spring month in Yountville, California, with an average temperature varying between 68°F (20°C) and 44.4°F (6.9°C).

Temperature

April's arrival signals a subtle increase in average high-temperatures, moving from March's comfortable 61.3°F (16.3°C) to a pleasant 68°F (20°C). Yountville's average nighttime temperatures present a clear contrast to its daytime highs, measured at a chilly 44.4°F (6.9°C) in April.

Humidity

The average relative humidity in April is 69%.

Rainfall

In Yountville, in April, during 8.3 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 77.8 rainfall days, and 16.02" (407mm) of precipitation is accumulated.

Daylight

The average length of the day in April in Yountville is 13h and 14min.
On the first day of April in Yountville, sunrise is at 6:52 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:00 pm PDT.

Sunshine

In Yountville, the average sunshine in April is 10h.

UV index

In Yountville, the average daily maximum UV index in April is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: During April, 5 as the daily maximum UV index converts into the following advice:
Act with care - The need to guard against sun damage is communicated. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
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Frequently asked questions

What is the temperature in April in Yountville?

The average high-temperature, in April, in Yountville, is 68°F (20°C), while the average low-temperature is 44.4°F (6.9°C).

What is the average humidity in April in Yountville?

In Yountville, California, the average relative humidity in April is 69%.

How much does it rain in Yountville in April?

In Yountville, California, in April, it is raining for 8.3 days, with typically 0.79" (20mm) of accumulated precipitation.

What is the average length of the day in April in Yountville?

In Yountville, the average day length in April is 13h and 14min.

When are sunrise and sunset in April in Yountville?

On the first day of April in Yountville, California, sunrise is at 6:52 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:00 pm PDT.

How long on average sun shines in April in Yountville?

In April, the average sunshine duration in Yountville, California, is 10h.

How high is the UV index in April in Yountville?

In April, the average daily maximum UV index in Yountville is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Yountville, CA

Average temperature in April - Yountville, CA
  • Average high temperature in April: 68°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in April: 44.4°F

The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).

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Average pressure in April
Yountville, CA

Average pressure in April - Yountville, CA
  • Average pressure in April: 30.03"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in April
Yountville, CA

Average wind speed in April - Yountville, CA
  • Average wind speed in April: 5.8mph

The windiest month (with the highest average wind speed) is May (6mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).

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Average humidity in April
Yountville, CA

Average humidity in April - Yountville, CA
  • Average humidity in April: 69%

The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (54%).

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Average rainfall in April
Yountville, CA

Average rainfall in April - Yountville, CA
  • Average rainfall in April: 0.79"

The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in April
Yountville, CA

Average rainfall days in April - Yountville, CA
  • Average rainfall days in April: 8.3 days

The month with the highest number of rainy days is March (13.9 days).
The month with the least rainy days is August (0.9 days).

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Average daylight in April /
Average sunshine in April
Yountville, CA

Average daylight in April / Average sunshine in April - Yountville, 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 30min).

  • Average sunshine in April: 10h and 0min

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 36min).

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Average sunshine days in April
Yountville, CA

Average sunshine days in April - Yountville, CA
  • Average sunshine days in April: 20.8 days

The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (15.8 days).

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Average UV index in April
Yountville, CA

Average UV index in April - Yountville, 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).

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Average cloud cover in April
Yountville, CA

Average cloud cover in April - Yountville, CA
  • Average cloud cover in April: 30

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in April
Yountville, CA

Average visibility in April - Yountville, 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).

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Yountville, California, USA

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