April Weather in Pomona, United States

Last updated: June 24, 2025

In April, the average temperature in Pomona, United States is a mild 13°C (56°F). However, be prepared for a range of conditions, with minimum temperatures dipping to -4°C (24°F) and maximums soaring up to 30°C (86°F). Precipitation can be expected, with an average of 163 mm (6.4 in) over about 12 days, and humidity levels can reach a high of 80%.

April Temperature in Pomona

In April in Pomona, the average temperature is 13°C (56°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop as low as -4°C (24°F). Be prepared for a range of weather, making it essential to pack layers for your travels.

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 13°C (56°F), with highs reaching up to 30°C (86°F) and lows dropping to around -4°C (24°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 precipitation amount reaches 163 mm (6.4 in) over the course of 12 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 163 mm (6.4 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Pomona

In Pomona in April humidity is 80%. With average temperature 13°C (56°F) this humidity feels like a damp chill that seeps into your bones, making outdoor exploration more challenging and necessitating layered clothing for comfort.

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 80%, 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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check 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 10, 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	2°C (36°F)	84 mm (3.3 inches)	83%	moderate
February Weather	4°C (39°F)	113 mm (4.4 inches)	81%	high
March Weather	10°C (50°F)	153 mm (6.0 inches)	80%	high
April Weather	13°C (56°F)	163 mm (6.4 inches)	80%	very high
May Weather	19°C (67°F)	187 mm (7.4 inches)	83%	extreme
June Weather	24°C (75°F)	79 mm (3.1 inches)	83%	extreme
July Weather	26°C (79°F)	77 mm (3.0 inches)	76%	extreme
August Weather	25°C (77°F)	109 mm (4.3 inches)	69%	very high
September Weather	23°C (73°F)	50 mm (2.0 inches)	68%	very high
October Weather	15°C (60°F)	127 mm (5.0 inches)	72%	high
November Weather	8°C (46°F)	76 mm (3.0 inches)	83%	moderate
December Weather	5°C (42°F)	77 mm (3.0 inches)	86%	moderate