April weather - Spring 2024

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

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 advent of April presents an average high-temperature of a pleasant 71.2°F (21.8°C), maintaining a close correlation with the preceding month. In April, Pasadena experiences an average nighttime temperature of 50.7°F (10.4°C).

Humidity

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. Throughout the year, there are 50.1 rainfall days, and 8.5" (216mm) of precipitation is accumulated.

Daylight

In April, the average length of the day 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, sunrise is at 6:03 am and sunset at 7:36 pm PDT.

Sunshine

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

UV index

In April, the average daily maximum UV index in Pasadena is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 5 in April interprets into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.

Updated: Jun 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are April temperatures?

The average high-temperature and low-temperature 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 April, the average relative humidity is 55%.

How much does it rain in April?

In Pasadena, during April, the rain falls for 5.3 days and regularly aggregates up to 0.59" (15mm) of precipitation.

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

The average day length in April is 13h and 4min.

When are sunrise and sunset in April?

On the first day of April, 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 long on average sun shines in April?

In April, the average sunshine duration is 11.4h.

How high is the UV index in April?

In Pasadena, the average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M April M J J A S O N D

Mar

April

May

Average high temperature

66.9°F 19.4°C

71.2°F 21.8°C

73.9°F 23.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.8mph 9.3km/h

6.3mph 10.1km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

22.8

24.5

25.3

Average UV index

Average cloud cover

Average visibility

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).

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).

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).

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%).

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").

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).

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).

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).

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).

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).

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).

April weather forecast
Pasadena, CA

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