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June Weather in Santa Rosa, United States

Last updated: June 24, 2025

In Santa Rosa, United States, the average temperature in June hovers around 21°C (69°F), making it a pleasant time to visit. However, be prepared for a temperature range that can drop to a cool 8°C (47°F) and soar up to a scorching 40°C (105°F). Expect minimal rainfall, with only 2 mm (0.1 in) of precipitation over 0 days, and enjoy the relatively high average humidity of 76%.

June Temperature in Santa Rosa

In June in Santa Rosa, the average temperature is 21°C (69°F), with maximums reaching up to 40°C (105°F) and minimums dipping as low as 8°C (47°F). This variability in temperature means travelers should be prepared for both warm and cool conditions while exploring.

June Weather in Santa Rosa: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Santa Rosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Rosa, June typically has an average temperature of 21°C (69°F), with highs reaching up to 40°C (105°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec485052576269717169635348
Data source: Temperature data for Santa Rosa 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 Santa Rosa

In Santa Rosa in June, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

June Precipitation Trends in Santa Rosa

The chart displays monthly precipitation patterns in Santa Rosa, 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 Santa Rosa, June typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec13915597452820024158101
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Santa Rosa

In Santa Rosa in June, humidity is 76%. With an average temperature of 21°C (69°F), this humidity feels like a warm, enveloping blanket, making travel slightly uncomfortable and creating a sticky atmosphere that can sap your energy as you explore.

June Average Humidity in Santa Rosa

This chart illustrates the average monthly humidity levels in Santa Rosa, 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 Santa Rosa is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%80%80%76%70%66%68%72%84%84%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Santa Rosa

In Santa Rosa in June, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Santa Rosa.

Maximum UV Index Levels in Santa Rosa for June

The chart shows the monthly maximum UV Index (UVI) for Santa Rosa 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 Santa Rosa typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Santa Rosa 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 Santa Rosa Compares to Other Months

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

This table compares monthly weather conditions in Santa Rosa, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)139 mm (5.5 inches)86%moderate
February Weather10°C (50°F)155 mm (6.1 inches)84%moderate
March Weather11°C (52°F)97 mm (3.8 inches)83%high
April Weather14°C (57°F)45 mm (1.8 inches)80%very high
May Weather17°C (62°F)27 mm (1.1 inches)80%very high
June Weather21°C (69°F)2 mm (0.1 inches)76%extreme
July Weather22°C (71°F)0 mm (0.0 inches)70%extreme
August Weather21°C (71°F)0 mm (0.0 inches)66%very high
September Weather20°C (69°F)2 mm (0.1 inches)68%very high
October Weather17°C (63°F)41 mm (1.6 inches)72%high
November Weather12°C (54°F)58 mm (2.3 inches)84%moderate
December Weather9°C (48°F)101 mm (4.0 inches)84%moderate

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