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January Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in January hovers around -1°C (31°F). However, be prepared for temperature swings, as it can dip as low as -22°C (-8°F) or reach a high of 21°C (70°F). During this month, expect 92 mm (3.6 in) of precipitation spread over 11 days, and keep in mind that the average humidity levels are quite high at 88%.

January Temperature in Dover

In January in Dover, the average temperature is -1°C (31°F). The maximum can reach 21°C (70°F), while the minimum can drop as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly and milder conditions.

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

The chart illustrates January temperature patterns in Dover, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dover, January typically has an average temperature of -1°C (31°F), with highs reaching up to 21°C (70°F) and lows dropping to around -22°C (-8°F).
JanFebMarAprMayJunJulAugSepOctNovDec303441516370757368574236
Data source: Temperature data for Dover 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 Dover

In Dover in January, the precipitation amount is 92 mm (3.6 in) spread over 11 days.

January Precipitation Trends in Dover

The chart displays monthly precipitation patterns in Dover, 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 Dover, January typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec92109103132121128120921071119696
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Dover

In Dover in January, humidity is 88%. With an average temperature of -1°C (31°F), this humidity feels like a biting cold that penetrates your clothing, making outdoor exploration challenging and the air clingy, adding an extra chill that can make you feel even colder than the temperature suggests.

January Average Humidity in Dover

This chart illustrates the average monthly humidity levels in Dover, 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 Dover is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Dover

In Dover 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 Dover, you can check the information here.

Maximum UV Index Levels in Dover for January

The chart shows the monthly maximum UV Index (UVI) for Dover 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 Dover typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Dover 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 Dover Compares to Other Months

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

This table compares monthly weather conditions in Dover, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)92 mm (3.6 inches)88%moderate
February Weather1°C (34°F)109 mm (4.3 inches)88%moderate
March Weather5°C (42°F)103 mm (4.1 inches)87%high
April Weather11°C (51°F)132 mm (5.2 inches)87%very high
May Weather17°C (63°F)121 mm (4.7 inches)81%very high
June Weather21°C (71°F)128 mm (5.0 inches)83%very high
July Weather24°C (75°F)120 mm (4.7 inches)82%very high
August Weather23°C (73°F)92 mm (3.6 inches)76%very high
September Weather20°C (68°F)107 mm (4.2 inches)77%very high
October Weather14°C (57°F)111 mm (4.4 inches)82%high
November Weather5°C (42°F)96 mm (3.8 inches)89%moderate
December Weather2°C (36°F)96 mm (3.8 inches)86%low

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