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April Weather in San Marino, United States

Last updated: June 24, 2025

In April, the average temperature in San Marino, United States is 17°C (63°F). Expect a range from a brisk 8°C (47°F) at night to a warm 36°C (97°F) during the day. During this month, precipitation averages around 23 mm (0.9 in) over the course of 3 days, with an average humidity of 70%.

April Temperature in San Marino

In April in San Marino, the average temperature is 17°C (63°F). Maximum temperatures can reach up to 36°C (97°F), while minimum temperatures can drop as low as 8°C (47°F). This variation makes it advisable for travelers to pack a mix of light clothing for warmer days and layers for cooler evenings.

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

The chart illustrates April temperature patterns in San Marino, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Marino, April typically has an average temperature of 17°C (63°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec555658636570757674696255
Data source: Temperature data for San Marino 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 Marino

In San Marino in April, the precipitation amount is 23 mm (0.9 in) over the course of 3 days.

April Precipitation Trends in San Marino

The chart displays monthly precipitation patterns in San Marino, 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 Marino, April typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec75636723163224102072
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Marino

In San Marino in April humidity is 70%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making travel both refreshing and slightly sticky, as you navigate the air thick with moisture.

April Average Humidity in San Marino

This chart illustrates the average monthly humidity levels in San Marino, 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 Marino is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%79%75%71%70%72%73%69%68%67%68%71%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Marino

In San Marino in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in San Marino.

Maximum UV Index Levels in San Marino for April

The chart shows the monthly maximum UV Index (UVI) for San Marino 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 Marino typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101011111010754
Data source: San Marino 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 Marino Compares to Other Months

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

This table compares monthly weather conditions in San Marino, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)75 mm (3.0 inches)74%moderate
February Weather13°C (56°F)63 mm (2.5 inches)79%high
March Weather14°C (58°F)67 mm (2.7 inches)75%very high
April Weather17°C (63°F)23 mm (0.9 inches)70%very high
May Weather18°C (65°F)16 mm (0.6 inches)70%very high
June Weather21°C (70°F)3 mm (0.1 inches)72%extreme
July Weather24°C (76°F)2 mm (0.1 inches)73%extreme
August Weather25°C (76°F)2 mm (0.1 inches)69%very high
September Weather23°C (74°F)4 mm (0.1 inches)68%very high
October Weather20°C (69°F)10 mm (0.4 inches)67%high
November Weather17°C (62°F)20 mm (0.8 inches)68%moderate
December Weather13°C (56°F)72 mm (2.8 inches)71%moderate

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