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January Weather in San Joaquin, United States

Last updated: June 24, 2025

In January in San Joaquin, United States, the average temperature hovers around 11°C (51°F), with a minimum of -1°C (30°F) and a maximum reaching 23°C (74°F). Visitors can expect about 60 mm (2.4 in) of precipitation over roughly 6 days, complemented by an average humidity level of 82%. Prepare for a varied climate!

January Temperature in San Joaquin

In January in San Joaquin, the average temperature is 11°C (51°F). The maximum can reach 23°C (74°F) and the minimum can be as low as -1°C (30°F). This makes San Joaquin a great destination for travelers looking to experience mild weather with a mix of cool and warm days.

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

The chart illustrates January temperature patterns in San Joaquin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Joaquin, January typically has an average temperature of 11°C (51°F), with highs reaching up to 23°C (74°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec515458667282888679685850
Data source: Temperature data for San Joaquin 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 Joaquin

In San Joaquin in January, the total precipitation amount is 60 mm (2.4 in) spread over 6 days.

January Precipitation Trends in San Joaquin

The chart displays monthly precipitation patterns in San Joaquin, 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 Joaquin, January typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec6047652517201192249
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in San Joaquin

In San Joaquin in January, humidity is 82%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring additional layers to stay warm while exploring.

January Average Humidity in San Joaquin

This chart illustrates the average monthly humidity levels in San Joaquin, 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 Joaquin 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 Joaquin

In San Joaquin 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 Joaquin for better planning.

Maximum UV Index Levels in San Joaquin for January

The chart shows the monthly maximum UV Index (UVI) for San Joaquin 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 Joaquin typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111211119753
Data source: San Joaquin 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 Joaquin Compares to Other Months

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

This table compares monthly weather conditions in San Joaquin, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)60 mm (2.4 inches)82%moderate
February Weather12°C (54°F)47 mm (1.9 inches)84%moderate
March Weather14°C (58°F)65 mm (2.5 inches)82%very high
April Weather19°C (66°F)25 mm (1.0 inches)78%very high
May Weather22°C (73°F)17 mm (0.7 inches)71%extreme
June Weather28°C (82°F)2 mm (0.1 inches)64%extreme
July Weather31°C (88°F)0 mm (0.0 inches)58%extreme
August Weather30°C (86°F)1 mm (0.0 inches)54%extreme
September Weather26°C (80°F)1 mm (0.0 inches)55%very high
October Weather20°C (68°F)9 mm (0.4 inches)62%high
November Weather14°C (58°F)22 mm (0.9 inches)78%moderate
December Weather10°C (51°F)49 mm (1.9 inches)80%moderate

Compare San Joaquin's Climate with Cities Worldwide