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Guide to Williamsburg weather in April. The average maximum daytime temperature in Williamsburg in April is a comfortable 21Â°C (70Â°F). The average night-time temperature is usually a cold 7Â°C (45Â°F). There are usually 9 hours of bright sunshine each day, which represents 65% of the 13 hours of daylight.
n/a. The highest average temperature in Williamsburg is August at 80.2 degrees. The coldest average temperature in Williamsburg is February at 42.4 degrees. The most monthly precipitation in Williamsburg occurs in January with 0 inches.The Williamsburg weather information is based on the average of the previous 3-7 years of data. Loading...he most monthly precipitation in Williamsburg occurs in January with 0 inches. The Williamsburg weather information is based on the average of the previous 3-7 years of data.