April Weather in Onset, United States

Last updated: June 24, 2025

In April, the average temperature in Onset, United States is a cool 9°C (48°F). Expect a range from a chilly -2°C (29°F) to a warm 24°C (76°F). With 122 mm (4.8 in) of precipitation spread over 13 days, be prepared for some wet weather. The average humidity sits at a comfortable 79%, making for an interesting climate this time of year!

April Temperature in Onset

In April in Onset, the average temperature is 9°C (48°F). The maximum can reach 24°C (76°F) and the minimum can be as low as -2°C (29°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cool conditions.

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

The chart illustrates April temperature patterns in Onset, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onset, April typically has an average temperature of 9°C (48°F), with highs reaching up to 24°C (76°F) and lows dropping to around -2°C (29°F).

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

April Precipitation in Onset

In Onset in April, the precipitation amount is 122 mm (4.8 in) recorded over a span of 13 days.

April Precipitation Trends in Onset

The chart displays monthly precipitation patterns in Onset, 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 Onset, April typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 13 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 Onset

In Onset in April humidity is 79%. With an average temperature of 9°C (48°F), this humidity feels like a chilly mist wrapping around you, making outdoor activities brisk yet invigorating, but it can also leave you feeling damp and slightly chilled if you're not dressed appropriately for the conditions.

April Average Humidity in Onset

This chart illustrates the average monthly humidity levels in Onset, 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 Onset is approximately 79%, 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 Onset

In Onset 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 Onset.

Maximum UV Index Levels in Onset for April

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

Data source: Onset 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 Onset Compares to Other Months

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

This table compares monthly weather conditions in Onset, 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 (34°F)	82 mm (3.2 inches)	84%	moderate
February Weather	2°C (36°F)	97 mm (3.8 inches)	84%	moderate
March Weather	4°C (39°F)	107 mm (4.2 inches)	82%	high
April Weather	9°C (48°F)	122 mm (4.8 inches)	79%	very high
May Weather	14°C (57°F)	98 mm (3.9 inches)	75%	very high
June Weather	19°C (67°F)	90 mm (3.5 inches)	78%	very high
July Weather	23°C (74°F)	102 mm (4.0 inches)	76%	very high
August Weather	23°C (74°F)	81 mm (3.2 inches)	76%	very high
September Weather	19°C (67°F)	102 mm (4.0 inches)	75%	very high
October Weather	14°C (58°F)	143 mm (5.6 inches)	75%	high
November Weather	8°C (46°F)	93 mm (3.7 inches)	80%	moderate
December Weather	3°C (38°F)	116 mm (4.6 inches)	80%	low