Millsboro, Delaware Weather by Month

Millsboro, Delaware, is a vibrant town located in Sussex County in the southern part of the state. Nestled along the Indian River, Millsboro is a blend of rich history, scenic beauty, and modern development. The town’s geographical coordinates are approximately 38.5918° N latitude and 75.2910° W longitude.

Millsboro is part of the United States and has seen significant growth over the years, transforming from a small agricultural community to a thriving town. As of the most recent census, Millsboro has a population of around 4,500 residents, reflecting its steady growth and development. The area covered by Millsboro is roughly 3.7 square miles, which includes residential neighborhoods, commercial districts, and expansive natural landscapes.

One notable company in Millsboro is Mountaire Farms, a large poultry processing company that plays a significant role in the local economy. While Millsboro does not host a major university, it is close to the University of Delaware’s Georgetown campus, which offers various educational programs and contributes to the region’s educational landscape.

Major landmarks in Millsboro include the Nanticoke Indian Museum, which preserves the history and culture of the Nanticoke people, and the Cupola Park, a popular spot for recreational activities and community events. Additionally, the nearby Indian River Bay offers opportunities for fishing, boating, and enjoying the natural beauty of the area, making Millsboro an appealing destination for outdoor enthusiasts.

Climate and Weather Overview

Millsboro, Delaware, experiences a humid subtropical climate, characterized by hot, humid summers and mild to cool winters. The town receives moderate annual precipitation, with the majority occurring during the late spring and summer months. The varied climate supports a diverse range of outdoor activities year-round, making Millsboro an attractive destination for both residents and visitors.

Average Monthly Temperature, Precipitation, and Sunny Days

Month Avg Temperature (°F) Avg Precipitation (inches) Avg Sunny Days
January 38.0 3.5 10
February 40.0 3.1 10
March 47.0 4.0 12
April 56.0 3.4 13
May 65.0 3.7 15
June 74.0 3.6 16
July 79.0 4.3 17
August 77.0 4.4 16
September 71.0 3.8 14
October 61.0 3.4 13
November 51.0 3.3 11
December 42.0 3.7 10

Detailed Weather by Month


January in Millsboro is the coldest month, with average temperatures around 38.0°F. The town typically receives about 3.5 inches of precipitation, mostly as rain with occasional snow. Sunny days are relatively few, averaging around 10 for the month.

Activities: Winter activities such as visiting local museums and indoor cultural venues are popular during this time. The cooler weather is also ideal for scenic drives along the Indian River. While major natural disasters are rare, occasional cold snaps and winter storms can occur, requiring preparedness for extreme weather conditions.


February remains cool with average temperatures slightly higher at 40.0°F. Precipitation decreases slightly to about 3.1 inches, primarily as rain. The town enjoys approximately 10 sunny days in February.

Activities: This month is ideal for continuing winter activities and attending Valentine’s Day events. The serene winter landscape is perfect for photography and exploring local parks. Indoor gatherings and cultural events remain popular during this colder period.


March marks the beginning of the transition to spring, with average temperatures rising to 47.0°F. Precipitation increases to 4.0 inches, with more frequent rain showers. The number of sunny days increases to 12.

Activities: As the weather starts to warm, early spring hikes and bird watching become more enjoyable. The longer days and blooming flora encourage outdoor activities, although trails can be muddy, so proper footwear is recommended. Local events and festivals celebrating the arrival of spring also begin to take place.


April brings milder temperatures, with averages around 56.0°F. Precipitation averages 3.4 inches, with more rain than snow. Sunny days become more frequent, averaging 13.

Activities: The arrival of spring blossoms makes April a perfect time for exploring the local parks and trails. Fishing season begins as rivers and lakes warm up, and it’s also an excellent time for visiting historical sites and museums. The warmer weather and blooming flowers create ideal conditions for photography and nature walks.


May sees a significant rise in temperatures, averaging 65.0°F. Precipitation increases slightly to 3.7 inches. The number of sunny days increases to 15.

Activities: The warming weather encourages outdoor activities such as hiking, biking, and fishing. Local farmers’ markets begin to open, offering fresh produce and handmade goods. May is also a great time for bird watching and exploring the diverse flora and fauna of the nearby parks and nature reserves. The month is also known for its numerous festivals and community events.


June marks the beginning of summer with average temperatures around 74.0°F. Precipitation decreases slightly to 3.6 inches. Sunny days are plentiful, averaging 16.

Activities: This is an excellent time for camping, boating, and participating in local festivals. The warm, sunny weather is perfect for exploring the Indian River and enjoying outdoor concerts and events. The numerous trails provide ample opportunities for adventure and exploration.


July is the warmest month in Millsboro, with average temperatures peaking at 79.0°F. Precipitation increases to 4.3 inches. Sunny days are most frequent, averaging 17.

Activities: Summer activities such as swimming, boating, and picnicking are popular. The Fourth of July celebrations in Millsboro include fireworks, parades, and community events. July is also a perfect time for outdoor adventures in the surrounding natural areas, with necessary precautions for sun protection.


August remains warm with average temperatures around 77.0°F. Precipitation remains high at 4.4 inches. Sunny days are abundant, averaging 16.

Activities: The warm weather is ideal for continued summer activities. Local agricultural fairs and markets offer fresh produce and crafts. Hiking, biking, and camping are popular, and the nearby lakes provide excellent conditions for water sports and fishing.


September sees a gradual cooling with average temperatures dropping to 71.0°F. Precipitation decreases slightly to 3.8 inches. Sunny days average 14.

Activities: This is a great month for outdoor sports and exploring historical sites. The cooler temperatures make hiking and biking more comfortable. The changing foliage adds a splash of color to the landscape. September is also a good time for attending local harvest festivals and enjoying the fall scenery.


October brings further cooling with average temperatures around 61.0°F. Precipitation remains steady at 3.4 inches. Sunny days are frequent, averaging 13.

Activities: Fall festivals and harvest events are popular in October. The mild weather is perfect for visiting pumpkin patches, corn mazes, and enjoying the fall scenery. The nearby parks and forests are particularly beautiful during this month with their vibrant autumn colors.


November marks the transition to winter with average temperatures dropping to 51.0°F. Precipitation remains steady at 3.3 inches. Sunny days average 11.

Activities: Indoor activities such as visiting museums and attending community events become more popular. The cooler weather signals the start of the holiday season, with local events and celebrations. November is also a good time for early holiday shopping in Millsboro’s charming shops and markets.


December is a cool month in Millsboro, with average temperatures around 42.0°F. Precipitation averages 3.7 inches, primarily as rain. Sunny days are still relatively few, averaging 10.

Activities: Holiday festivities and winter sports like ice skating and snowshoeing are common. The cooler weather and festive atmosphere make December a special time in Millsboro, with holiday markets and events adding to the charm. Exploring the rural landscape during the mild winter days can be particularly rewarding.

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