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January Weather in San Martin, United States

Last updated: June 24, 2025

In January, the average temperature in San Martin, United States hovers around 10°C (50°F). Expect a range from a chilly -2°C (29°F) to a pleasant 24°C (75°F). Be prepared for 103 mm (4.0 in) of precipitation spread over 7 days, coupled with an average humidity of 82%.

January Temperature in San Martin

In January in San Martin, the average temperature is 10°C (50°F). Maximums can reach 24°C (75°F), while minimums can be as low as -2°C (29°F). Expect a varied climate, so pack layers to enjoy your travels comfortably.

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

The chart illustrates January 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, January typically has an average temperature of 10°C (50°F), with highs reaching up to 24°C (75°F) and lows dropping to around -2°C (29°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.

January Precipitation in San Martin

In San Martin in January, the precipitation amount is 103 mm (4.0 in) over a span of 7 days.

January Precipitation Trends in San Martin

The chart displays monthly precipitation patterns in San Martin, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In San Martin, January typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec103797326151112173079
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in San Martin

In San Martin in January, humidity is 82%. With an average temperature of 10°C (50°F), this humidity feels like a dense, heavy blanket wrapping around you, making every step feel sluggish and the air thick, which can make traveling quite uncomfortable.

January Average Humidity in San Martin

This chart illustrates the average monthly humidity levels in San Martin, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in San Martin is approximately 82%, 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 January generated using information from the Copernicus Climate Change Service.

January UV Index in San Martin

In San Martin in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in San Martin for better planning.

Maximum UV Index Levels in San Martin for January

The chart shows the monthly maximum UV Index (UVI) for San Martin in January, 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 January, the maximum UV index in San Martin typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111111109753
Data source: San Martin January 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 January 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 January’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 January’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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