April Weather in Riverside, United States

Last updated: June 24, 2025

In April, the average temperature in Riverside, United States hovers around 10°C (49°F). Expect a range with minimums dipping to -5°C (24°F) and maximums soaring up to 27°C (82°F). Precipitation is typically around 60 mm (2.4 in) spread over 9 days, contributing to an average humidity of 74%. Be prepared for a mix of weather this month!

April Temperature in Riverside

In April in Riverside, the average temperature is 10°C (49°F). Maximums can reach 27°C (82°F), and minimums can be as low as -5°C (24°F). This diverse weather means travelers should prepare for both warm and cold conditions during their visit.

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

The chart illustrates April temperature patterns in Riverside, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riverside, April typically has an average temperature of 10°C (49°F), with highs reaching up to 27°C (82°F) and lows dropping to around -5°C (24°F).

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

April Precipitation in Riverside

In Riverside in April, the total precipitation amount is 60 mm (2.4 in), occurring over a span of 9 days.

April Precipitation Trends in Riverside

The chart displays monthly precipitation patterns in Riverside, 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 Riverside, April typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 9 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 Riverside

In Riverside in April humidity is 74%. With an average temperature of 10°C (49°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting you to seek warmth and cozy shelter more often.

April Average Humidity in Riverside

This chart illustrates the average monthly humidity levels in Riverside, 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 Riverside is approximately 74%, 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 Riverside

In Riverside 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 Riverside.

Maximum UV Index Levels in Riverside for April

The chart shows the monthly maximum UV Index (UVI) for Riverside 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 Riverside typically reaches 9, which falls under the very high exposure category.

Data source: Riverside 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 Riverside Compares to Other Months

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

This table compares monthly weather conditions in Riverside, 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 (27°F)	53 mm (2.1 inches)	91%	moderate
February Weather	0°C (31°F)	63 mm (2.5 inches)	92%	moderate
March Weather	5°C (42°F)	58 mm (2.3 inches)	84%	high
April Weather	10°C (49°F)	60 mm (2.4 inches)	74%	very high
May Weather	15°C (59°F)	44 mm (1.7 inches)	62%	very high
June Weather	22°C (71°F)	19 mm (0.7 inches)	56%	extreme
July Weather	27°C (80°F)	12 mm (0.5 inches)	44%	extreme
August Weather	25°C (77°F)	16 mm (0.6 inches)	37%	very high
September Weather	19°C (67°F)	34 mm (1.3 inches)	46%	very high
October Weather	10°C (50°F)	41 mm (1.6 inches)	67%	high
November Weather	4°C (39°F)	38 mm (1.5 inches)	84%	moderate
December Weather	-2°C (28°F)	42 mm (1.7 inches)	88%	moderate