January Weather in Glendora, United States

Last updated: June 24, 2025

In January, the average temperature in Glendora, United States hovers around 10°C (50°F). Expect a chill in the air with minimum temperatures dipping to -3°C (27°F), while warmer days can reach up to 26°C (80°F). Be prepared for some rain, as the region experiences 77 mm (3.0 in) of precipitation over 5 days. With an average humidity of 78%, it's a time for cozy layers and an eye (or umbrella) for the skies!

January Temperature in Glendora

In January in Glendora, the average temperature is 10°C (50°F). Maximums can reach 26°C (80°F), and minimums can drop as low as -3°C (27°F). Therefore, travelers should be prepared for a wide range of weather conditions during their visit.

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

The chart illustrates January temperature patterns in Glendora, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Glendora, January typically has an average temperature of 10°C (50°F), with highs reaching up to 26°C (80°F) and lows dropping to around -3°C (27°F).

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

January Precipitation in Glendora

In Glendora in January, the precipitation amount is 77 mm (3.0 in) over the course of 5 days.

January Precipitation Trends in Glendora

The chart displays monthly precipitation patterns in Glendora, 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 Glendora, January typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 5 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Glendora

In Glendora in January humidity is 78%. With an average temperature of 10°C (50°F), this humidity feels like a chilly dampness that can seep into your clothes, making outdoor activities less enjoyable and requiring extra layers to stay warm as you explore the area.

January Average Humidity in Glendora

This chart illustrates the average monthly humidity levels in Glendora, 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 Glendora is approximately 78%, 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 Glendora

In Glendora 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 Glendora for better planning.

Maximum UV Index Levels in Glendora for January

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

Data source: Glendora 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 Glendora Compares to Other Months

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

This table compares monthly weather conditions in Glendora, 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)	77 mm (3.0 inches)	78%	moderate
February Weather	10°C (50°F)	73 mm (2.9 inches)	82%	high
March Weather	11°C (53°F)	79 mm (3.1 inches)	75%	very high
April Weather	15°C (59°F)	25 mm (1.0 inches)	68%	very high
May Weather	17°C (62°F)	20 mm (0.8 inches)	57%	extreme
June Weather	21°C (71°F)	3 mm (0.1 inches)	52%	extreme
July Weather	25°C (77°F)	6 mm (0.2 inches)	46%	extreme
August Weather	25°C (77°F)	9 mm (0.4 inches)	39%	extreme
September Weather	23°C (73°F)	6 mm (0.2 inches)	48%	very high
October Weather	18°C (65°F)	11 mm (0.4 inches)	59%	high
November Weather	14°C (58°F)	25 mm (1.0 inches)	72%	moderate
December Weather	10°C (50°F)	79 mm (3.1 inches)	76%	moderate