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April Weather in San Francisco, Mexico

Last updated: August 27, 2025

In April, the average temperature in San Francisco, Mexico is a pleasant 19°C (67°F). While you can enjoy warm days, be prepared for lows of 8°C (47°F) and the occasional heat spike reaching a maximum of 37°C (99°F). With just 1 mm (0.0 in) of precipitation over 0 days, you'll likely find the weather dry, complemented by an average humidity level of 58%.

April Temperature in San Francisco

In April in San Francisco, the average temperature is 19°C (67°F). Maximums can reach 37°C (99°F) and minimums can be as low as 8°C (47°F). Be prepared for a wide range of temperatures, making it ideal for various outdoor activities.

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 19°C (67°F), with highs reaching up to 37°C (99°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec616163666771788179746861
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 1 mm (0.0 in) during a span 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 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec121014111221191512
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 58%. With an average temperature of 19°C (67°F), this humidity feels like a comfortable embrace, making it ideal for leisurely strolls and outdoor adventures, though you might want to stay hydrated as you explore.

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 58%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%69%61%58%61%61%63%70%75%72%72%72%
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 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 San Francisco.

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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6810121212121212975
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 (61°F)12 mm (0.5 inches)71%high
February Weather16°C (62°F)10 mm (0.4 inches)69%very high
March Weather17°C (64°F)14 mm (0.6 inches)61%very high
April Weather19°C (67°F)1 mm (0.0 inches)58%extreme
May Weather19°C (67°F)1 mm (0.0 inches)61%extreme
June Weather22°C (72°F)1 mm (0.0 inches)61%extreme
July Weather26°C (79°F)2 mm (0.1 inches)63%extreme
August Weather27°C (81°F)2 mm (0.1 inches)70%extreme
September Weather26°C (79°F)11 mm (0.4 inches)75%extreme
October Weather23°C (74°F)9 mm (0.4 inches)71%very high
November Weather20°C (68°F)15 mm (0.6 inches)72%high
December Weather16°C (62°F)12 mm (0.5 inches)72%moderate

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