April weather forecastPasadena, CA
April
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 6min
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 24min
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).
