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January Weather in San Marino, United States

Last updated: June 24, 2025

In January, the average temperature in San Marino, United States typically hovers around 13°C (56°F). You can expect a minimum of 2°C (37°F) and a maximum soaring to 31°C (88°F). During this period, precipitation averages 75 mm (3.0 in) over approximately 5 days, while the humidity remains relatively high at 74%.

January Temperature in San Marino

In January in San Marino, the average temperature is 13°C (56°F), with maximums reaching up to 31°C (88°F) and minimums dropping as low as 2°C (37°F). This variation in temperature makes San Marino an ideal destination for travelers who enjoy both warm days and cool evenings.

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

The chart illustrates January 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, January typically has an average temperature of 13°C (56°F), with highs reaching up to 31°C (88°F) and lows dropping to around 2°C (37°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.

January Precipitation in San Marino

In San Marino in January, the precipitation amount is 75 mm (3.0 in) spread over a duration of 5 days.

January Precipitation Trends in San Marino

The chart displays monthly precipitation patterns in San Marino, 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 Marino, January typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec75636723163224102072
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in San Marino

In San Marino in January humidity is 74%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, especially for travelers unaccustomed to such conditions.

January Average Humidity in San Marino

This chart illustrates the average monthly humidity levels in San Marino, 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 Marino is approximately 74%, 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 January generated using information from the Copernicus Climate Change Service.

January UV Index in San Marino

In San Marino 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 Marino for better planning.

Maximum UV Index Levels in San Marino for January

The chart shows the monthly maximum UV Index (UVI) for San Marino 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 Marino typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101011111010754
Data source: San Marino 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 Marino Compares to Other Months

Weather in San Marino varies notably across the year, with each month offering distinct climate conditions. This page compares January’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 January’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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