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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 25°C (78°F). However, be prepared for a range, as it can dip to a chilly 9°C (49°F) or soar up to a sizzling 39°C (103°F). Expect about 41 mm (1.6 in) of precipitation spread over 6 days, and humidity levels are notably high at 74%.

June Temperature in Santa Rosa

In June in Santa Rosa, the average temperature is 25°C (78°F). Maximum temperatures can reach up to 39°C (103°F), while minimum temperatures can drop as low as 9°C (49°F). Be sure to pack both light clothing for the heat and warmer layers for the cooler evenings.

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 25°C (78°F), with highs reaching up to 39°C (103°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec394251586877797772584941
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 41 mm (1.6 in) over the course of 6 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 41 mm (1.6 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec151228273041315633481411
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 74%. With an average temperature of 25°C (78°F), this humidity feels like you're enveloped in a warm, thick blanket, making outdoor activities feel more strenuous and necessitating frequent breaks and hydration for comfortable travel.

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 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%75%61%62%69%74%75%78%76%76%80%77%
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 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, 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 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213121211854
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 Weather4°C (39°F)15 mm (0.6 inches)74%moderate
February Weather6°C (43°F)12 mm (0.5 inches)75%high
March Weather11°C (51°F)28 mm (1.1 inches)61%very high
April Weather14°C (58°F)27 mm (1.1 inches)61%extreme
May Weather20°C (68°F)30 mm (1.2 inches)69%extreme
June Weather25°C (78°F)41 mm (1.6 inches)74%extreme
July Weather26°C (80°F)31 mm (1.2 inches)75%extreme
August Weather25°C (77°F)56 mm (2.2 inches)78%extreme
September Weather22°C (72°F)33 mm (1.3 inches)76%extreme
October Weather14°C (58°F)47 mm (1.9 inches)76%very high
November Weather9°C (49°F)14 mm (0.6 inches)80%moderate
December Weather5°C (42°F)11 mm (0.4 inches)77%moderate

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