January Weather in Grayson, United States

Last updated: June 24, 2025

In January, the average temperature in Grayson, United States hovers around 10°C (49°F). Expect minimums to dip to -11°C (12°F) and maximums to peak at 28°C (82°F). The region typically experiences 112 mm (4.4 in) of precipitation over 10 days, accompanied by an average humidity level of 83%.

January Temperature in Grayson

In January in Grayson, the average temperature is 10°C (49°F). Maximums can reach 28°C (82°F), while minimums can drop as low as -11°C (12°F). Be prepared for a wide range of temperatures when traveling during this time.

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 (49°F), with highs reaching up to 28°C (82°F) and lows dropping to around -11°C (12°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 112 mm (4.4 in) over the course of 10 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 112 mm (4.4 inches) of precipitation spread over approximately 10 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 83%. With an average temperature of 10°C (49°F), this humidity feels like a damp chill enveloping you, making outdoor activities feel more uncomfortable and potentially dampening your travel experience.

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 83%, 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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Grayson for better planning.

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 4, 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 (49°F)	112 mm (4.4 inches)	83%	moderate
February Weather	12°C (54°F)	169 mm (6.6 inches)	83%	high
March Weather	17°C (62°F)	114 mm (4.5 inches)	80%	very high
April Weather	19°C (66°F)	140 mm (5.5 inches)	81%	extreme
May Weather	24°C (75°F)	144 mm (5.7 inches)	81%	extreme
June Weather	27°C (80°F)	131 mm (5.1 inches)	78%	extreme
July Weather	28°C (83°F)	113 mm (4.4 inches)	79%	extreme
August Weather	28°C (83°F)	120 mm (4.7 inches)	79%	extreme
September Weather	26°C (80°F)	96 mm (3.8 inches)	79%	very high
October Weather	21°C (70°F)	120 mm (4.7 inches)	77%	very high
November Weather	13°C (56°F)	80 mm (3.2 inches)	85%	high
December Weather	12°C (53°F)	124 mm (4.9 inches)	88%	moderate