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June Weather in Rialto, United States

Last updated: June 24, 2025

In Rialto, United States, the average temperature in June hovers around 22°C (72°F). However, be prepared for a wide range, as temperatures can dip to a brisk 10°C (51°F) or soar to a scorching 39°C (102°F). During this time, you can expect minimal precipitation, with only about 3 mm (0.1 in) falling over 1 day, and the average humidity sits comfortably at 48%.

June Temperature in Rialto

In June in Rialto, the average temperature is 22°C (72°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 10°C (51°F). This variety in temperatures makes Rialto a suitable destination for travelers looking to experience both warm days and cooler evenings.

June Weather in Rialto: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Rialto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rialto, June typically has an average temperature of 22°C (72°F), with highs reaching up to 39°C (102°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec515154606472787874665951
Data source: Temperature data for Rialto 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.

June Precipitation in Rialto

In Rialto in June, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

June Precipitation Trends in Rialto

The chart displays monthly precipitation patterns in Rialto, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Rialto, June typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec70707531183111010112870
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Rialto

In Rialto in June, humidity is 48%. With an average temperature of 22°C (72°F), this humidity feels like a pleasant embrace, making it comfortable for traveling and exploring the sights without feeling overly muggy or sticky.

June Average Humidity in Rialto

This chart illustrates the average monthly humidity levels in Rialto, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Rialto is approximately 48%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%77%67%56%46%48%46%42%52%58%66%74%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Rialto

In Rialto in June, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Rialto.

Maximum UV Index Levels in Rialto for June

The chart shows the monthly maximum UV Index (UVI) for Rialto in June, 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 June, the maximum UV index in Rialto typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101112121110854
Data source: Rialto June 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 June Weather in Rialto Compares to Other Months

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

This table compares monthly weather conditions in Rialto, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)70 mm (2.8 inches)72%moderate
February Weather11°C (52°F)70 mm (2.7 inches)77%high
March Weather12°C (54°F)75 mm (2.9 inches)67%very high
April Weather16°C (61°F)31 mm (1.2 inches)56%very high
May Weather18°C (64°F)18 mm (0.7 inches)46%extreme
June Weather22°C (72°F)3 mm (0.1 inches)48%extreme
July Weather26°C (78°F)11 mm (0.4 inches)46%extreme
August Weather26°C (79°F)10 mm (0.4 inches)42%extreme
September Weather23°C (74°F)10 mm (0.4 inches)52%very high
October Weather19°C (66°F)11 mm (0.4 inches)58%very high
November Weather15°C (59°F)28 mm (1.1 inches)66%moderate
December Weather11°C (51°F)70 mm (2.7 inches)74%moderate

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