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April Weather in San Martin, United States

Last updated: June 24, 2025

In April, the average temperature in San Martin, United States hovers around 14°C (57°F). Expect a chill with minimums dipping to 3°C (37°F), while highs can reach a warm 32°C (89°F). During this month, anticipate approximately 26 mm (1.0 in) of precipitation spread over 4 days, contributing to an average humidity of 78%.

April Temperature in San Martin

In April in San Martin, the average temperature is 14°C (57°F). The maximum can reach 32°C (89°F) and the minimum can be as low as 3°C (37°F). Travelers should be prepared for a wide range of temperatures, so layering clothing is advisable.

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

The chart illustrates April temperature patterns in San Martin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Martin, April typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (89°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec505153576065676867625550
Data source: Temperature data for San Martin 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 Martin

In San Martin in April, the precipitation amount is 26 mm (1.0 in) over the course of 4 days.

April Precipitation Trends in San Martin

The chart displays monthly precipitation patterns in San Martin, 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 Martin, April typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec103797326151112173079
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Martin

In San Martin in April, humidity is 78%. With an average temperature of 14°C (57°F), this humidity feels like a damp blanket wrapping around you, making outdoor exploration a bit uncomfortable but still enjoyable if you stay hydrated and plan for breaks in the shade.

April Average Humidity in San Martin

This chart illustrates the average monthly humidity levels in San Martin, 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 Martin is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Martin

In San Martin in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in San Martin.

Maximum UV Index Levels in San Martin for April

The chart shows the monthly maximum UV Index (UVI) for San Martin 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 Martin typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111111109753
Data source: San Martin 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 Martin Compares to Other Months

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

This table compares monthly weather conditions in San Martin, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)103 mm (4.0 inches)82%moderate
February Weather11°C (52°F)79 mm (3.1 inches)84%moderate
March Weather12°C (53°F)73 mm (2.9 inches)82%very high
April Weather14°C (57°F)26 mm (1.0 inches)78%very high
May Weather15°C (60°F)15 mm (0.6 inches)71%extreme
June Weather18°C (65°F)1 mm (0.0 inches)64%extreme
July Weather19°C (67°F)1 mm (0.0 inches)58%extreme
August Weather20°C (68°F)1 mm (0.0 inches)54%very high
September Weather19°C (67°F)2 mm (0.1 inches)55%very high
October Weather17°C (62°F)17 mm (0.7 inches)62%high
November Weather13°C (55°F)30 mm (1.2 inches)78%moderate
December Weather10°C (50°F)79 mm (3.1 inches)80%moderate

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