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January Weather in Hercules, United States

Last updated: June 24, 2025

In January, the average temperature in Hercules, United States hovers around 10°C (50°F), with a range that can dip as low as -2°C (29°F) and soar up to 25°C (78°F). Expect precipitation of about 101 mm (4.0 in) over the course of 8 days, contributing to an average humidity level of 82%. Embrace the mild and sometimes rainy climate as you explore this beautiful region!

January Temperature in Hercules

In January in Hercules, the average temperature is 10°C (50°F), with maximums reaching 25°C (78°F) and minimums dropping as low as -2°C (29°F). This variation in temperature makes it essential for travelers to pack layers for comfortable exploration of Hercules.

January Weather in Hercules: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Hercules, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hercules, January typically has an average temperature of 10°C (50°F), with highs reaching up to 25°C (78°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec505254596267676868645550
Data source: Temperature data for Hercules 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 Hercules

In Hercules in January, the precipitation amount is 101 mm (4.0 in) spread over 8 days.

January Precipitation Trends in Hercules

The chart displays monthly precipitation patterns in Hercules, 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 Hercules, January typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1011017732182001254188
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Hercules

In Hercules 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 Hercules

This chart illustrates the average monthly humidity levels in Hercules, 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 Hercules 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 Hercules

In Hercules in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Hercules, you can check the information here.

Maximum UV Index Levels in Hercules for January

The chart shows the monthly maximum UV Index (UVI) for Hercules 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 Hercules typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109643
Data source: Hercules 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 Hercules Compares to Other Months

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

This table compares monthly weather conditions in Hercules, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)101 mm (4.0 inches)82%moderate
February Weather11°C (53°F)101 mm (4.0 inches)84%moderate
March Weather12°C (54°F)77 mm (3.0 inches)82%very high
April Weather15°C (59°F)32 mm (1.3 inches)78%very high
May Weather17°C (63°F)18 mm (0.7 inches)71%very high
June Weather19°C (67°F)1 mm (0.1 inches)64%extreme
July Weather19°C (67°F)0 mm (0.0 inches)58%extreme
August Weather20°C (68°F)0 mm (0.0 inches)54%very high
September Weather20°C (68°F)1 mm (0.0 inches)55%very high
October Weather18°C (64°F)25 mm (1.0 inches)62%high
November Weather13°C (56°F)41 mm (1.6 inches)78%moderate
December Weather10°C (50°F)88 mm (3.5 inches)80%moderate

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