April Weather in Sudbury, United States

Last updated: June 24, 2025

In April, the average temperature in Sudbury, United States is a crisp 9°C (48°F). Visitors should be prepared for a wide range of temperatures, with a minimum dipping to -4°C (25°F) and a maximum soaring up to 30°C (86°F). Expect 124 mm (4.9 in) of precipitation spread over about 12 days, and enjoy the refreshing ambiance with an average humidity of 80%.

April Temperature in Sudbury

In April in Sudbury, the average temperature is 9°C (48°F). The maximum can reach 30°C (86°F) and the minimum can be as low as -4°C (25°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates April temperature patterns in Sudbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sudbury, April typically has an average temperature of 9°C (48°F), with highs reaching up to 30°C (86°F) and lows dropping to around -4°C (25°F).

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

April Precipitation in Sudbury

In Sudbury in April, the total precipitation amount is 124 mm (4.9 in) over a span of 12 days.

April Precipitation Trends in Sudbury

The chart displays monthly precipitation patterns in Sudbury, 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 Sudbury, April typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Sudbury

In Sudbury in April humidity is 80%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel quite uncomfortable.

April Average Humidity in Sudbury

This chart illustrates the average monthly humidity levels in Sudbury, 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 Sudbury is approximately 80%, 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 Sudbury

In Sudbury in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Sudbury.

Maximum UV Index Levels in Sudbury for April

The chart shows the monthly maximum UV Index (UVI) for Sudbury 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 Sudbury typically reaches 8, which falls under the very high exposure category.

Data source: Sudbury 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 Sudbury Compares to Other Months

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

This table compares monthly weather conditions in Sudbury, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	69 mm (2.7 inches)	86%	moderate
February Weather	0°C (32°F)	85 mm (3.3 inches)	84%	moderate
March Weather	3°C (38°F)	86 mm (3.4 inches)	82%	high
April Weather	9°C (48°F)	124 mm (4.9 inches)	80%	very high
May Weather	15°C (59°F)	86 mm (3.4 inches)	72%	very high
June Weather	20°C (69°F)	85 mm (3.4 inches)	72%	very high
July Weather	23°C (74°F)	133 mm (5.3 inches)	67%	very high
August Weather	23°C (73°F)	85 mm (3.4 inches)	66%	very high
September Weather	19°C (66°F)	79 mm (3.1 inches)	71%	high
October Weather	13°C (55°F)	132 mm (5.2 inches)	78%	high
November Weather	5°C (42°F)	97 mm (3.8 inches)	84%	moderate
December Weather	0°C (33°F)	118 mm (4.6 inches)	81%	low