December Weather in Olney, United States

Last updated: June 24, 2025

In December, the average temperature in Olney, United States hovers around 10°C (50°F). Expect a range with lows dipping to -7°C (20°F) and highs reaching up to 32°C (89°F). You'll encounter approximately 41 mm (1.6 in) of precipitation spread over about 4 days, contributing to a notably high average humidity of 85%.

December Temperature in Olney

In December in Olney, the average temperature is 10°C (50°F). The maximum can reach 32°C (89°F), and the minimum can be as low as -7°C (20°F). This wide range of temperatures makes it essential for travelers to pack both warm and light clothing to enjoy their visit comfortably.

December Weather in Olney: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Olney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Olney, December typically has an average temperature of 10°C (50°F), with highs reaching up to 32°C (89°F) and lows dropping to around -7°C (20°F).

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

December Precipitation in Olney

In Olney in December, the precipitation amount is 41 mm (1.6 in) over the course of 4 days.

December Precipitation Trends in Olney

The chart displays monthly precipitation patterns in Olney, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Olney, December typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 4 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Olney

In Olney in December, humidity is 85%. With an average temperature of 10°C (50°F), this humidity feels like a heavy, damp blanket surrounding you, making travel feel sluggish and uncomfortable as you navigate through the thick, moist air.

December Average Humidity in Olney

This chart illustrates the average monthly humidity levels in Olney, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Olney is approximately 85%, offering insight into how humid the weather typically is during this month.

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

December UV Index in Olney

In Olney in December, 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 Olney for better planning.

Maximum UV Index Levels in Olney for December

The chart shows the monthly maximum UV Index (UVI) for Olney in December, 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 December, the maximum UV index in Olney typically reaches 4, which falls under the moderate exposure category.

Data source: Olney December 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 December Weather in Olney Compares to Other Months

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

This table compares monthly weather conditions in Olney, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	37 mm (1.5 inches)	77%	moderate
February Weather	8°C (47°F)	44 mm (1.7 inches)	76%	high
March Weather	15°C (59°F)	71 mm (2.8 inches)	74%	very high
April Weather	18°C (65°F)	63 mm (2.5 inches)	75%	very high
May Weather	24°C (75°F)	99 mm (3.9 inches)	80%	extreme
June Weather	28°C (83°F)	57 mm (2.2 inches)	80%	extreme
July Weather	30°C (87°F)	23 mm (0.9 inches)	75%	extreme
August Weather	30°C (86°F)	48 mm (1.9 inches)	67%	extreme
September Weather	26°C (79°F)	94 mm (3.7 inches)	64%	very high
October Weather	19°C (67°F)	78 mm (3.1 inches)	70%	very high
November Weather	13°C (55°F)	33 mm (1.3 inches)	82%	high
December Weather	10°C (50°F)	41 mm (1.6 inches)	85%	moderate