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April Weather in San Francisco, Mexico

Last updated: August 26, 2025

In April, the average temperature in San Francisco, Mexico is a pleasant 21°C (69°F), with a minimum dipping to 8°C (47°F) and a maximum soaring to 33°C (92°F). Expect minimal rainfall, with just 3 mm (0.1 in) of precipitation over 0 days. The average humidity hovers around 60%, creating a comfortable atmosphere for any activities you have planned!

April Temperature in San Francisco

In April in San Francisco, the average temperature is 21°C (69°F). The maximum can reach 33°C (92°F), while the minimum can drop to as low as 8°C (47°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities, from warm sunny days to cooler evenings.

April Weather in San Francisco: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in San Francisco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Francisco, April typically has an average temperature of 21°C (69°F), with highs reaching up to 33°C (92°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec616367697170686868676461
Data source: Temperature data for San Francisco 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 San Francisco

In San Francisco in April, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

April Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, 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 San Francisco, April typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec9147343207280313278139347
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Francisco

In San Francisco in April, humidity is 60%. With an average temperature of 21°C (69°F), this humidity feels like a warm embrace, making it perfect for leisurely strolls and outdoor adventures, though you might want to stay hydrated and take breaks in shaded areas for a comfortable travel experience.

April Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, 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 San Francisco is approximately 60%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%65%59%60%67%80%81%83%83%80%77%76%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Francisco

In San Francisco in April, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Francisco, you can check here.

Maximum UV Index Levels in San Francisco for April

The chart shows the monthly maximum UV Index (UVI) for San Francisco 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 San Francisco typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911141414141313141298
Data source: San Francisco 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 San Francisco Compares to Other Months

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

This table compares monthly weather conditions in San Francisco, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (62°F)9 mm (0.3 inches)70%very high
February Weather17°C (64°F)14 mm (0.6 inches)65%extreme
March Weather19°C (67°F)7 mm (0.3 inches)59%extreme
April Weather21°C (69°F)3 mm (0.1 inches)60%extreme
May Weather22°C (71°F)43 mm (1.7 inches)67%extreme
June Weather21°C (70°F)207 mm (8.1 inches)80%extreme
July Weather20°C (68°F)280 mm (11.0 inches)81%extreme
August Weather20°C (68°F)313 mm (12.3 inches)83%extreme
September Weather20°C (68°F)278 mm (10.9 inches)83%extreme
October Weather19°C (67°F)139 mm (5.5 inches)80%extreme
November Weather18°C (65°F)34 mm (1.3 inches)77%very high
December Weather16°C (62°F)7 mm (0.3 inches)76%very high

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