April Weather in Upland, United States

Last updated: June 24, 2025

In April, the average temperature in Upland, United States hovers around 13°C (55°F). However, be prepared for a range from a chilly -1°C (30°F) to a warm 31°C (88°F). This month typically sees 105 mm (4.1 in) of precipitation over 11 days, contributing to an average humidity of 81%—making it a time for both cozy indoor activities and refreshing outdoor adventures!

April Temperature in Upland

In April in Upland, the average temperature is 13°C (55°F). Maximum temperatures can reach up to 31°C (88°F), while minimum temperatures can drop as low as -1°C (30°F). Overall, it's advisable to pack for both warm and cold weather if you're planning to travel during this month.

April Weather in Upland: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Upland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Upland, April typically has an average temperature of 13°C (55°F), with highs reaching up to 31°C (88°F) and lows dropping to around -1°C (30°F).

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

April Precipitation in Upland

In Upland in April, the precipitation amount is 105 mm (4.1 in) over the course of 11 days.

April Precipitation Trends in Upland

The chart displays monthly precipitation patterns in Upland, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Upland, April typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Upland

In Upland in April, humidity is 81%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making strolls outdoors feel heavy and slightly oppressive, which may be less than ideal for travelers looking to explore comfortably.

April Average Humidity in Upland

This chart illustrates the average monthly humidity levels in Upland, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Upland is approximately 81%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Upland

In Upland in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Upland.

Maximum UV Index Levels in Upland for April

The chart shows the monthly maximum UV Index (UVI) for Upland in April, 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 April, the maximum UV index in Upland typically reaches 9, which falls under the very high exposure category.

Data source: Upland April 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 April Weather in Upland Compares to Other Months

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

This table compares monthly weather conditions in Upland, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	64 mm (2.5 inches)	84%	moderate
February Weather	4°C (39°F)	103 mm (4.1 inches)	83%	moderate
March Weather	7°C (45°F)	106 mm (4.2 inches)	83%	high
April Weather	13°C (55°F)	105 mm (4.1 inches)	81%	very high
May Weather	18°C (65°F)	135 mm (5.3 inches)	78%	very high
June Weather	23°C (74°F)	118 mm (4.7 inches)	79%	very high
July Weather	26°C (79°F)	136 mm (5.4 inches)	74%	very high
August Weather	25°C (77°F)	140 mm (5.5 inches)	72%	very high
September Weather	22°C (71°F)	100 mm (3.9 inches)	75%	very high
October Weather	16°C (61°F)	109 mm (4.3 inches)	81%	high
November Weather	8°C (47°F)	83 mm (3.3 inches)	85%	moderate
December Weather	4°C (40°F)	100 mm (3.9 inches)	84%	moderate