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January Weather in Erin, United States

Last updated: June 24, 2025

In Erin, United States, the average temperature for January is a chilly 4°C (40°F), with extremes ranging from a frosty -15°C (5°F) to a mild 22°C (72°F). During this month, you can expect about 104 mm (4.1 in) of precipitation spread across 9 days, and a notable average humidity of 86% that adds a brisk edge to the air.

January Temperature in Erin

In January in Erin, the average temperature is 4°C (40°F), with maximums reaching 22°C (72°F) and minimums dropping as low as -15°C (5°F). Be prepared for a wide range of temperatures whether you're planning outdoor adventures or cozy indoor activities.

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

The chart illustrates January temperature patterns in Erin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Erin, January typically has an average temperature of 4°C (40°F), with highs reaching up to 22°C (72°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec404452597077817874634945
Data source: Temperature data for Erin 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 Erin

In Erin in January, the precipitation amount is 104 mm (4.1 in) over the course of 9 days.

January Precipitation Trends in Erin

The chart displays monthly precipitation patterns in Erin, 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 Erin, January typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec10417616016212810911611711212892132
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Erin

In Erin in January humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

January Average Humidity in Erin

This chart illustrates the average monthly humidity levels in Erin, 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 Erin is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Erin

In Erin 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 Erin, you can check the information here.

Maximum UV Index Levels in Erin for January

The chart shows the monthly maximum UV Index (UVI) for Erin 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 Erin typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Erin 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 Erin Compares to Other Months

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

This table compares monthly weather conditions in Erin, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)104 mm (4.1 inches)86%moderate
February Weather7°C (44°F)175 mm (6.9 inches)84%high
March Weather11°C (53°F)160 mm (6.3 inches)84%high
April Weather15°C (59°F)162 mm (6.4 inches)80%very high
May Weather21°C (70°F)128 mm (5.1 inches)82%very high
June Weather25°C (77°F)109 mm (4.3 inches)83%extreme
July Weather27°C (81°F)115 mm (4.5 inches)79%extreme
August Weather26°C (78°F)117 mm (4.6 inches)76%very high
September Weather23°C (74°F)112 mm (4.4 inches)75%very high
October Weather17°C (63°F)128 mm (5.0 inches)74%high
November Weather9°C (49°F)92 mm (3.6 inches)85%moderate
December Weather7°C (46°F)132 mm (5.2 inches)88%moderate

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