January Weather in John Day, United States

Last updated: June 24, 2025

In John Day, United States, the average temperature in January hovers around -3°C (28°F). Expect chilly days, with a minimum temperature dropping to a frigid -23°C (-9°F) and highs reaching up to 9°C (49°F). Be prepared for approximately 70 mm (2.7 in) of precipitation spread over 13 days, and a notable 86% humidity that adds to the wintry ambiance.

January Temperature in John Day

In January in John Day, the average temperature is -3°C (28°F). Maximum can reach 9°C (49°F) and minimum can be as low as -23°C (-9°F). Travelers should be prepared for a wide temperature range and dress accordingly for cold weather activities.

January Weather in John Day: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in John Day, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In John Day, January typically has an average temperature of -3°C (28°F), with highs reaching up to 9°C (49°F) and lows dropping to around -23°C (-9°F).

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

January Precipitation in John Day

In John Day in January, the precipitation amount is 70 mm (2.7 in) over the course of 13 days.

January Precipitation Trends in John Day

The chart displays monthly precipitation patterns in John Day, 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 John Day, January typically receives around 70 mm (2.7 inches) of precipitation spread over approximately 13 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 John Day

In John Day in January, humidity is 86%. With an average temperature of -3°C (28°F), this humidity feels like a biting chill that seeps through layers of clothing, making travel outside quite uncomfortable and necessitating frequent warm-up breaks indoors.

January Average Humidity in John Day

This chart illustrates the average monthly humidity levels in John Day, 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 John Day is approximately 86%, 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 John Day

In John Day 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 John Day, you can check the information here.

Maximum UV Index Levels in John Day for January

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

Data source: John Day 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 John Day Compares to Other Months

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

This table compares monthly weather conditions in John Day, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (28°F)	70 mm (2.7 inches)	86%	moderate
February Weather	-2°C (29°F)	101 mm (4.0 inches)	86%	moderate
March Weather	2°C (35°F)	78 mm (3.1 inches)	85%	high
April Weather	5°C (41°F)	80 mm (3.1 inches)	83%	very high
May Weather	10°C (50°F)	73 mm (2.9 inches)	77%	very high
June Weather	15°C (59°F)	41 mm (1.6 inches)	81%	extreme
July Weather	20°C (69°F)	3 mm (0.1 inches)	76%	very high
August Weather	20°C (68°F)	14 mm (0.6 inches)	60%	very high
September Weather	14°C (58°F)	31 mm (1.2 inches)	58%	very high
October Weather	6°C (44°F)	56 mm (2.2 inches)	75%	high
November Weather	1°C (35°F)	62 mm (2.4 inches)	85%	moderate
December Weather	-2°C (28°F)	67 mm (2.6 inches)	87%	low