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April Weather in Pomona, United States

Last updated: June 24, 2025

In April, the average temperature in Pomona, United States hovers around 13°C (55°F). Be prepared for a range of temperatures, as it can drop to a brisk -7°C (20°F) and soar up to a warm 31°C (88°F). Throughout the month, expect 94 mm (3.7 in) of precipitation spread over 11 days, with an average humidity level of 73%.

April Temperature in Pomona

In April, in Pomona, the average temperature is 13°C (55°F). Maximums can reach 31°C (88°F), while minimums can dip as low as -7°C (20°F). This range of temperatures makes Pomona a versatile destination for travelers, so be sure to pack accordingly!

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 (55°F), with highs reaching up to 31°C (88°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec323447556677807772574539
Data source: Temperature data for Pomona generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Pomona

In Pomona in April, the precipitation amount is 94 mm (3.7 in) over the course of 11 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 94 mm (3.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec53359594202111105121801183832
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Pomona

In Pomona in April humidity is 73%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that can penetrate layers of clothing, making it essential for travelers to dress in warm, moisture-wicking fabrics to stay comfortable while exploring.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109743
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.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)53 mm (2.1 inches)76%moderate
February Weather1°C (34°F)35 mm (1.4 inches)77%high
March Weather9°C (48°F)95 mm (3.7 inches)70%high
April Weather13°C (55°F)94 mm (3.7 inches)73%very high
May Weather19°C (66°F)202 mm (7.9 inches)82%very high
June Weather25°C (78°F)111 mm (4.4 inches)82%extreme
July Weather27°C (80°F)105 mm (4.1 inches)81%extreme
August Weather25°C (77°F)121 mm (4.8 inches)78%very high
September Weather22°C (72°F)80 mm (3.1 inches)71%very high
October Weather14°C (58°F)118 mm (4.6 inches)71%high
November Weather7°C (45°F)38 mm (1.5 inches)81%moderate
December Weather4°C (39°F)32 mm (1.3 inches)84%moderate

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