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April Weather in San Jose, United States

Last updated: June 24, 2025

In April, the average temperature in San Jose, United States is a pleasant 20°C (68°F), with minimums dipping to 5°C (41°F) and maximums soaring up to 34°C (94°F). With only 2 mm (0.1 in) of precipitation over 0 days, you can expect mostly dry conditions. On top of that, the average humidity sits at a comfortable 55%, making for an enjoyable climate.

April Temperature in San Jose

In April in San Jose, the average temperature is 20°C (68°F). Maximum temperatures can reach 34°C (94°F) and minimums can drop as low as 5°C (41°F). This varied climate makes it a great time for travelers to experience both warm days and cooler evenings, perfect for outdoor activities and exploration.

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

The chart illustrates April temperature patterns in San Jose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose, April typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec465058687686868579685848
Data source: Temperature data for San Jose 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 Jose

In San Jose in April, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

April Precipitation Trends in San Jose

The chart displays monthly precipitation patterns in San Jose, 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 Jose, April typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec233216234452228132025
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Jose

In San Jose in April humidity is 55%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it comfortable for traveling but slightly sticky, encouraging leisurely strolls and relaxed outdoor activities.

April Average Humidity in San Jose

This chart illustrates the average monthly humidity levels in San Jose, 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 Jose is approximately 55%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%82%68%55%45%37%43%53%66%72%81%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Jose

In San Jose in April, 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 San Jose.

Maximum UV Index Levels in San Jose for April

The chart shows the monthly maximum UV Index (UVI) for San Jose 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 Jose typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710111212121211864
Data source: San Jose 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 Jose Compares to Other Months

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

This table compares monthly weather conditions in San Jose, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)23 mm (0.9 inches)81%moderate
February Weather10°C (50°F)32 mm (1.2 inches)82%high
March Weather15°C (59°F)16 mm (0.6 inches)68%very high
April Weather20°C (68°F)2 mm (0.1 inches)55%extreme
May Weather24°C (76°F)3 mm (0.1 inches)45%extreme
June Weather30°C (86°F)4 mm (0.2 inches)37%extreme
July Weather30°C (86°F)45 mm (1.8 inches)43%extreme
August Weather29°C (85°F)22 mm (0.9 inches)53%extreme
September Weather26°C (79°F)28 mm (1.1 inches)66%extreme
October Weather20°C (68°F)13 mm (0.5 inches)72%very high
November Weather14°C (58°F)20 mm (0.8 inches)81%high
December Weather9°C (48°F)25 mm (1.0 inches)84%moderate

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