April weather forecast
Petaluma, CA

Share

Weather in April

April in Petaluma, California, is a comfortable spring month, with an average temperature varying between 64.8°F (18.2°C) and 46.9°F (8.3°C).

Temperature

The onset of April brings an average high-temperature of a still refreshing 64.8°F (18.2°C), nearly matching the March temperature. An average low-temperature of 46.9°F (8.3°C) is anticipated throughout the nights in Petaluma, California, during April.

Humidity

In Petaluma, the average relative humidity in April is 73%.

Rainfall

In Petaluma, in April, during 7.3 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, in Petaluma, California, there are 71.1 rainfall days, and 15.24" (387mm) of precipitation is accumulated.

Daylight

The average length of the day in April is 13h and 13min.
On the first day of the month, sunrise is at 6:54 am and sunset at 7:34 pm. On the last day of April, sunrise is at 6:13 am and sunset at 8:01 pm PDT.

Sunshine

In April, the average sunshine is 10.2h.

UV index

The average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In April, the average maximum UV index of 5 translates into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Minimize direct exposure to the Sun during midday when its radiation is at its peak. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
[Resources]

Frequently asked questions

What are the temperatures in Petaluma in April?

In April, the average high-temperature and low-temperature in Petaluma are 64.8°F (18.2°C) and 46.9°F (8.3°C) respectively.

What is the average humidity in April in Petaluma?

In Petaluma, the average relative humidity in April is 73%.

How much does it rain in Petaluma in April?

In April, in Petaluma, California, the rain falls for 7.3 days. Throughout April, 0.75" (19mm) of precipitation is accumulated.

How many hours of daylight does Petaluma have in April?

The average day length in April in Petaluma is 13h and 13min.

When is the sunrise / sunset in April in Petaluma?

In April, on the first day of the month, sunrise is at 6:54 am and sunset at 7:34 pm. On the last day of the month, in Petaluma, sunrise is at 6:13 am and sunset at 8:01 pm PDT.

How many hours of sunshine does Petaluma have in April?

The average sunshine duration in April in Petaluma is 10.2h.

What is the UV index reading in April in Petaluma?

In April, the average daily maximum UV index in Petaluma is 5. A UV Index reading of 3 to 5 represents a medium health risk 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
Petaluma, CA

Average temperature in April - Petaluma, CA
  • Average high temperature in April: 64.8°F

The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in April: 46.9°F

The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is December (43.2°F).

[Resources]

Average pressure in April
Petaluma, CA

Average pressure in April - Petaluma, 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).

[Resources]

Average wind speed in April
Petaluma, CA

Average wind speed in April - Petaluma, CA
  • Average wind speed in April: 7mph

The windiest months (with the highest average wind speed) are April and May (7mph).
The calmest month (with the lowest average wind speed) is November (5mph).

[Resources]

Average humidity in April
Petaluma, CA

Average humidity in April - Petaluma, CA
  • Average humidity in April: 73%

The month with the highest relative humidity is March (77%).
The months with the lowest relative humidity are September and October (65%).

[Resources]

Average rainfall in April
Petaluma, CA

Average rainfall in April - Petaluma, CA
  • Average rainfall in April: 0.75"

The wettest month (with the highest rainfall) is February (3.5").
The driest months (with the least rainfall) are July and August (0.04").

[Resources]

Average rainfall days in April
Petaluma, CA

Average rainfall days in April - Petaluma, CA
  • Average rainfall days in April: 7.3 days

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is July (1 days).

[Resources]

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

Average daylight in April / Average sunshine in April - Petaluma, 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 month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

[Resources]

Average sunshine days in April
Petaluma, CA

Average sunshine days in April - Petaluma, CA
  • Average sunshine days in April: 21.6 days

The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is March (17.2 days).

[Resources]

Average UV index in April
Petaluma, CA

Average UV index in April - Petaluma, CA
  • Average UV index in April: 5

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

[Resources]

Average cloud cover in April
Petaluma, CA

Average cloud cover in April - Petaluma, CA
  • Average cloud cover in April: 29

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 10).

[Resources]

Average visibility in April
Petaluma, CA

Average visibility in April - Petaluma, 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).

[Resources]

Petaluma, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location