January Weather in Grayson, United States

Last updated: June 24, 2025

In January, the average temperature in Grayson, United States hovers around 10°C (50°F). You can expect minimums to dip to -1°C (30°F) and highs reaching up to 23°C (74°F). With an average humidity of 82%, the atmosphere can feel quite damp. Be prepared for 93 mm (3.7 in) of precipitation spread over 8 days, so don’t forget your umbrella!

January Temperature in Grayson

In January in Grayson, the average temperature is 10°C (50°F). Maximums can reach 23°C (74°F), and minimums can be as low as -1°C (30°F). Be prepared for a range of weather conditions if you're planning to travel during this month.

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

The chart illustrates January temperature patterns in Grayson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grayson, January typically has an average temperature of 10°C (50°F), with highs reaching up to 23°C (74°F) and lows dropping to around -1°C (30°F).

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

January Precipitation in Grayson

In Grayson in January, the total precipitation amount is 93 mm (3.7 in) over the course of 8 days.

January Precipitation Trends in Grayson

The chart displays monthly precipitation patterns in Grayson, 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 Grayson, January typically receives around 93 mm (3.7 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 Grayson

In Grayson 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 Grayson

This chart illustrates the average monthly humidity levels in Grayson, 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 Grayson is approximately 82%, 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 Grayson

In Grayson 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 Grayson, you can check the information here.

Maximum UV Index Levels in Grayson for January

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

Data source: Grayson 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 Grayson Compares to Other Months

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

This table compares monthly weather conditions in Grayson, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	93 mm (3.7 inches)	82%	moderate
February Weather	11°C (52°F)	72 mm (2.8 inches)	84%	moderate
March Weather	13°C (55°F)	80 mm (3.1 inches)	82%	very high
April Weather	16°C (61°F)	31 mm (1.2 inches)	78%	very high
May Weather	20°C (68°F)	18 mm (0.7 inches)	71%	very high
June Weather	25°C (76°F)	2 mm (0.1 inches)	64%	extreme
July Weather	27°C (81°F)	0 mm (0.0 inches)	58%	extreme
August Weather	26°C (80°F)	0 mm (0.0 inches)	54%	very high
September Weather	24°C (75°F)	1 mm (0.1 inches)	55%	very high
October Weather	19°C (66°F)	16 mm (0.6 inches)	62%	high
November Weather	13°C (56°F)	29 mm (1.1 inches)	78%	moderate
December Weather	10°C (50°F)	78 mm (3.1 inches)	80%	moderate