April weather forecast
Riverdale, CA

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Weather in April

April in Riverdale, California, is a warm spring month, with an average temperature fluctuating between 51.4°F (10.8°C) and 74.8°F (23.8°C).

Temperature

As Riverdale welcomes April, the average high-temperature displays a subtle shift, adjusting from a comfortable 67.8°F (19.9°C) in March to a warm 74.8°F (23.8°C). Riverdale, after hot April days, encounters a marked drop to an average nighttime temperature of 51.4°F (10.8°C).

Humidity

The average relative humidity in April is 53%.

Rainfall

In Riverdale, in April, during 7 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. In Riverdale, California, during the entire year, the rain falls for 58.2 days and collects up to 9.29" (236mm) of precipitation.

Daylight

The average length of the day in April is 13h and 9min.
On the first day of the month, sunrise is at 6:44 am and sunset at 7:22 pm. On the last day of April, sunrise is at 6:06 am and sunset at 7:47 pm PDT.

Sunshine

In April, the average sunshine in Riverdale is 10.9h.

UV index

The average daily maximum UV index in April in Riverdale is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 6 during April translates into the following directions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
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Frequently asked questions

What are the temperatures in Riverdale in April?

In April, in Riverdale, the average high-temperature is 74.8°F (23.8°C), and the average low-temperature is 51.4°F (10.8°C).

What is the average humidity in April in Riverdale?

In April, the average relative humidity is 53%.

How many days does it rain in April in Riverdale?

In Riverdale, during April, the rain falls for 7 days and regularly aggregates up to 0.94" (24mm) of precipitation.

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

In April, the average day length in Riverdale is 13h and 9min.

What time are sunrise and sunset in April in Riverdale?

In April, on the first day of the month, sunrise is at 6:44 am and sunset at 7:22 pm. On the last day of the month, in Riverdale, California, sunrise is at 6:06 am and sunset at 7:47 pm PDT.

How many hours of sunshine does Riverdale have in April?

In Riverdale, California, the average sunshine duration in April is 10.9h.

What is the UV index reading in April in Riverdale?

In Riverdale, the average daily maximum UV index in April is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe 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
Riverdale, CA

Average temperature in April - Riverdale, CA
  • Average high temperature in April: 74.8°F

The warmest month (with the highest average high temperature) is July (102.2°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in April: 51.4°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is December (43°F).

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Average pressure in April
Riverdale, CA

Average pressure in April - Riverdale, CA
  • Average pressure in April: 30"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in April
Riverdale, CA

Average wind speed in April - Riverdale, CA
  • Average wind speed in April: 6.5mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and November (4.8mph).

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Average humidity in April
Riverdale, CA

Average humidity in April - Riverdale, CA
  • Average humidity in April: 53%

The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).

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Average rainfall in April
Riverdale, CA

Average rainfall in April - Riverdale, CA
  • Average rainfall in April: 0.94"

The wettest months (with the highest rainfall) are January, February and March (1.54").
The driest month (with the least rainfall) is August (0.08").

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Average rainfall days in April
Riverdale, CA

Average rainfall days in April - Riverdale, CA
  • Average rainfall days in April: 7 days

The month with the highest number of rainy days is March (9.6 days).
The month with the least rainy days is August (0.8 days).

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

Average daylight in April / Average sunshine in April - Riverdale, CA
  • Average daylight in April: 13h and 1min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in April: 10h and 5min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in April
Riverdale, CA

Average sunshine days in April - Riverdale, CA
  • Average sunshine days in April: 22.5 days

The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (19.4 days).

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Average UV index in April
Riverdale, CA

Average UV index in April - Riverdale, CA
  • Average UV index in April: 6

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).

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Average cloud cover in April
Riverdale, CA

Average cloud cover in April - Riverdale, CA
  • Average cloud cover in April: 21

The months with the most cloud cover are March and December (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in April
Riverdale, CA

Average visibility in April - Riverdale, 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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Riverdale, California, USA

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