January Weather in Onset, United States

Last updated: June 24, 2025

In January, the average temperature in Onset, United States hovers around 1°C (34°F). Temperatures can vary widely, with a minimum of -19°C (-1°F) and a maximum reaching 19°C (66°F). You can expect about 82 mm (3.2 in) of precipitation spread over 8 days, contributing to an average humidity of 84%.

January Temperature in Onset

In January in Onset, the average temperature is 1°C (34°F), with maximums reaching 19°C (66°F) and minimums dipping as low as -19°C (-1°F). It's essential to pack layers for your trip, as you can experience a wide range of temperatures during your stay.

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

The chart illustrates January temperature patterns in Onset, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onset, January typically has an average temperature of 1°C (34°F), with highs reaching up to 19°C (66°F) and lows dropping to around -19°C (-1°F).

Data source: Temperature data for Onset generated using information from the Copernicus Climate Change Service.

January Precipitation in Onset

In Onset in January, the total precipitation amount reached 82 mm (3.2 in) over the course of 8 days.

January Precipitation Trends in Onset

The chart displays monthly precipitation patterns in Onset, 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 Onset, January typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Onset

In Onset in January humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.

January Average Humidity in Onset

This chart illustrates the average monthly humidity levels in Onset, 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 Onset is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Onset

In Onset 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 Onset, you can check the information here.

Maximum UV Index Levels in Onset for January

The chart shows the monthly maximum UV Index (UVI) for Onset 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 Onset typically reaches 3, which falls under the moderate exposure category.

Data source: Onset 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 Onset Compares to Other Months

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

This table compares monthly weather conditions in Onset, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	82 mm (3.2 inches)	84%	moderate
February Weather	2°C (36°F)	97 mm (3.8 inches)	84%	moderate
March Weather	4°C (39°F)	107 mm (4.2 inches)	82%	high
April Weather	9°C (48°F)	122 mm (4.8 inches)	79%	very high
May Weather	14°C (57°F)	98 mm (3.9 inches)	75%	very high
June Weather	19°C (67°F)	90 mm (3.5 inches)	78%	very high
July Weather	23°C (74°F)	102 mm (4.0 inches)	76%	very high
August Weather	23°C (74°F)	81 mm (3.2 inches)	76%	very high
September Weather	19°C (67°F)	102 mm (4.0 inches)	75%	very high
October Weather	14°C (58°F)	143 mm (5.6 inches)	75%	high
November Weather	8°C (46°F)	93 mm (3.7 inches)	80%	moderate
December Weather	3°C (38°F)	116 mm (4.6 inches)	80%	low