April Weather in Pomona, United States

Last updated: June 24, 2025

In April, the average temperature in Pomona, United States hovers around 12°C (54°F). Be prepared for a temperature range that can dip to a brisk -1°C (31°F) and soar to a warm 31°C (88°F). With an average humidity of 79%, you're likely to feel the moisture in the air. Don't forget your umbrella, as 98 mm (3.9 in) of precipitation can be expected over 10 days.

April Temperature in Pomona

In April in Pomona, the average temperature is 12°C (54°F), with maximums reaching 31°C (88°F) and minimums dropping as low as -1°C (31°F). This diverse range of temperatures makes it essential for travelers to pack for both warm days and chilly nights.

April Weather in Pomona: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Pomona, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pomona, April typically has an average temperature of 12°C (54°F), with highs reaching up to 31°C (88°F) and lows dropping to around -1°C (31°F).

Data source: Temperature data for Pomona generated using information from the Copernicus Climate Change Service.

April Precipitation in Pomona

In Pomona in April, the total precipitation amount is 98 mm (3.9 in) recorded over a span of 10 days.

April Precipitation Trends in Pomona

The chart displays monthly precipitation patterns in Pomona, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Pomona, April typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Pomona

In Pomona in April, humidity is 79%. With an average temperature of 12°C (54°F), this humidity makes traveling feel quite muggy, leading to a sticky discomfort that can sap your energy and make outdoor activities less enjoyable.

April Average Humidity in Pomona

This chart illustrates the average monthly humidity levels in Pomona, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Pomona is approximately 79%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Pomona

In Pomona in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Pomona.

Maximum UV Index Levels in Pomona for April

The chart shows the monthly maximum UV Index (UVI) for Pomona in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Pomona typically reaches 8, which falls under the very high exposure category.

Data source: Pomona April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How April Weather in Pomona Compares to Other Months

Weather in Pomona varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Pomona, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Pomona, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	65 mm (2.5 inches)	83%	moderate
February Weather	5°C (41°F)	102 mm (4.0 inches)	82%	moderate
March Weather	7°C (45°F)	109 mm (4.3 inches)	81%	high
April Weather	12°C (54°F)	98 mm (3.9 inches)	79%	very high
May Weather	17°C (63°F)	109 mm (4.3 inches)	74%	very high
June Weather	23°C (73°F)	90 mm (3.5 inches)	77%	very high
July Weather	26°C (79°F)	125 mm (4.9 inches)	76%	very high
August Weather	25°C (77°F)	132 mm (5.2 inches)	77%	very high
September Weather	22°C (72°F)	112 mm (4.4 inches)	74%	very high
October Weather	17°C (63°F)	136 mm (5.4 inches)	75%	high
November Weather	9°C (49°F)	80 mm (3.1 inches)	80%	moderate
December Weather	5°C (42°F)	106 mm (4.2 inches)	81%	moderate