April weather forecast
Pasadena, CA

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Pasadena City Hall in California, with neon-lit paths and natural gardens, under a perfect blue night sky
Pasadena City Hall in California, with neon-lit paths and natural gardens, under a perfect blue night sky

Weather in April

Pasadena's April weather shows a further increment in the temperature range from March, reaching up to 71.2°F (21.8°C) at its high. Changes on the meteorological front in April are evident with a clear rise in temperatures, indicating the departure from the early spring season. Outdoor activities continue to flourish with warm temperatures and increased sunshine hours. The blossoming flowers and burgeoning vegetation become even more conspicuous, painting the city in an eruption of colors. Despite the rising heat, the comfortable wind speed keeps the weather from becoming unbearably hot, marking April as an excellent time to immerse oneself in Pasadena's vibrant spring season.

Temperature

The transition into April shows a subtle variation to an agreeable 71.2°F (21.8°C) from March's 66.9°F (19.4°C) in the average high-temperature. Pasadena's average low-temperature in April is measured at a fresh 50.7°F (10.4°C).

Humidity

In Pasadena, the average relative humidity in April is 55%.

Rainfall

In Pasadena, in April, it is raining for 5.3 days, with typically 0.59" (15mm) of accumulated precipitation. In Pasadena, during the entire year, the rain falls for 50.1 days and collects up to 8.5" (216mm) of precipitation.

Daylight

The average length of the day in April is 13h and 4min.
On the first day of the month, sunrise is at 6:38 am and sunset at 7:13 pm. On the last day of April, in Pasadena, sunrise is at 6:03 am and sunset at 7:36 pm PDT.

Sunshine

The average sunshine in April in Pasadena is 11.4h.

UV index

In Pasadena, California, 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 ordinary individuals.
Note: The daily high UV index of 5 in April translates into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
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Frequently asked questions

What is the temperature in April in Pasadena?

The average high-temperature and low-temperature in Pasadena during April are 71.2°F (21.8°C) and 50.7°F (10.4°C) respectively.

What is the average humidity in April in Pasadena?

In April, the average relative humidity in Pasadena is 55%.

How much does it rain in Pasadena in April?

In April, in Pasadena, the rain falls for 5.3 days. Throughout April, 0.59" (15mm) of precipitation is accumulated.

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

In April, the average day length in Pasadena is 13h and 4min.

When are sunrise and sunset in April in Pasadena?

On the first day of April in Pasadena, sunrise is at 6:38 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 7:36 pm PDT.

How many hours of sunshine does Pasadena have in April?

The average sunshine duration in April in Pasadena, California, is 11.4h.

What is the UV index reading in April in Pasadena?

In Pasadena, California, the average daily maximum UV index in April is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Pasadena, CA

Average temperature in April - Pasadena, CA
  • Average high temperature in April: 71.2°F

The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in April: 50.7°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (46.6°F).

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Average pressure in April
Pasadena, CA

Average pressure in April - Pasadena, CA
  • Average pressure in April: 29.97"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in April
Pasadena, CA

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

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in April
Pasadena, CA

Average humidity in April - Pasadena, CA
  • Average humidity in April: 55%

The month with the highest relative humidity is June (58%).
The month with the lowest relative humidity is November (47%).

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Average rainfall in April
Pasadena, CA

Average rainfall in April - Pasadena, CA
  • Average rainfall in April: 0.59"

The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in April
Pasadena, CA

Average rainfall days in April - Pasadena, CA
  • Average rainfall days in April: 5.3 days

The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.1 days).

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

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

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in April: 11h and 2min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).

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Average sunshine days in April
Pasadena, CA

Average sunshine days in April - Pasadena, CA
  • Average sunshine days in April: 24.5 days

The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in April
Pasadena, CA

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

The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in April
Pasadena, CA

Average cloud cover in April - Pasadena, CA
  • Average cloud cover in April: 16

The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in April
Pasadena, CA

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

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