New Castle, Delaware Weather by Month

By | July 20, 2024

New Castle, Delaware, is a historic city located in New Castle County in the northern part of the state. It is part of the United States and lies along the Delaware River, approximately five miles south of Wilmington. New Castle covers an area of about 3.2 square miles and is known for its well-preserved colonial architecture and charming cobblestone streets.

As of the latest census, New Castle has a population of around 5,500 residents. The city is a blend of rich history and modern development. One of the most famous companies in the area is the New Castle-based refinery owned by Delaware City Refining Company, contributing significantly to the local economy. Although New Castle does not host a major university, it is within proximity to the University of Delaware in Newark, which provides higher education and cultural events to the local population.

New Castle is home to several significant landmarks and attractions. The New Castle Historic District is a major draw, featuring numerous buildings from the 17th and 18th centuries. The Read House and Gardens, a National Historic Landmark, offers a glimpse into the life of a prominent 19th-century family. The city also boasts the New Castle Court House Museum, which played a pivotal role in Delaware’s statehood, and Battery Park, a scenic riverfront area popular for picnics and outdoor activities.

Climate and Weather Overview

New Castle, Delaware, experiences a humid subtropical climate, characterized by hot, humid summers and mild to cool winters. The area receives a moderate amount of rainfall throughout the year, with occasional severe weather events such as thunderstorms and nor’easters.

Month Average Temperature (°F) Average Precipitation (inches) Average Sunny Days
January 32.1 3.40 8
February 35.6 2.90 9
March 44.1 4.10 10
April 54.8 3.30 12
May 64.6 3.70 13
June 73.4 3.50 14
July 78.5 4.30 14
August 76.8 4.10 13
September 69.8 3.90 12
October 58.1 3.40 10
November 47.2 3.20 9
December 36.4 3.60 8

January: Winter’s Chill

January in New Castle is characterized by cold temperatures, with an average of 32.1°F. Daytime highs typically reach around 41°F, while nighttime lows can drop to around 24°F. The city receives about 3.40 inches of precipitation, primarily as rain, with occasional light snowfall.

Natural Disasters: Severe weather events are rare in January, but cold snaps and occasional ice storms can disrupt daily life and lead to hazardous driving conditions.

Activities: January is a good time for indoor activities. Visiting the New Castle Court House Museum, exploring local shops, and enjoying indoor recreational facilities are recommended. Outdoor enthusiasts can enjoy mild winter walks in Battery Park and bird watching along the Delaware River.

February: Slightly Warmer

February sees a slight increase in temperatures, averaging 35.6°F. Precipitation decreases slightly to 2.90 inches, and the town enjoys around 9 sunny days.

Natural Disasters: Similar to January, cold fronts can bring frost and occasional snow or ice.

Activities: February offers similar activities as January, with an emphasis on indoor events and mild outdoor activities. Exploring local shops, attending community events, and enjoying the scenic views of the Delaware River are popular.

March: Transition to Spring

March brings a noticeable warming trend, with average temperatures rising to 44.1°F. Precipitation increases to 4.10 inches, and the town experiences more sunny days.

Natural Disasters: Early spring storms can occur, bringing strong winds and occasional hail.

Activities: March is a great time for outdoor activities as the weather becomes more pleasant. Hiking, biking, and exploring local parks are recommended. The warmer weather also encourages participation in community events and outdoor markets.

April: Spring in Full Bloom

April sees further warming, with average temperatures reaching 54.8°F. Precipitation averages 3.30 inches, and sunny days become more frequent.

Natural Disasters: Spring storms, including thunderstorms and hail, can occur, sometimes causing localized flooding.

Activities: April is perfect for outdoor activities such as hiking, bird watching, and picnicking. Visiting local gardens and participating in outdoor community events are popular. The blooming flowers and mild weather make it an ideal time for nature photography.

May: Pleasant Weather

May brings warm temperatures, averaging 64.6°F. Precipitation increases to 3.70 inches, and the town enjoys numerous sunny days.

Natural Disasters: Severe thunderstorms can occur, sometimes bringing hail and strong winds.

Activities: May is ideal for outdoor activities like hiking, biking, and exploring nature trails. The pleasant weather is perfect for attending local festivals and other community events. Visiting nearby lakes and enjoying outdoor dining are also popular.

June: Early Summer Heat

June ushers in early summer with average temperatures of 73.4°F. Precipitation remains steady at 3.50 inches, and sunny days become more frequent.

Natural Disasters: Thunderstorms can bring heavy rain, though they are less frequent than in spring.

Activities: June is great for outdoor recreation. Swimming, hiking, and visiting local parks are popular. Attending outdoor concerts and community events offers entertainment and socializing opportunities. The longer daylight hours are perfect for evening walks and stargazing.

July: Peak Summer

July is the warmest month, with average temperatures around 78.5°F. Precipitation averages 4.30 inches, often from afternoon thunderstorms.

Natural Disasters: The primary concern in July is the heightened risk of severe thunderstorms and occasional heatwaves, posing risks such as flash flooding and heat-related illnesses.

Activities: July is ideal for summer activities like swimming, picnicking, and enjoying water sports. Local festivals, outdoor movie nights, and farmers’ markets provide a variety of entertainment options. The warm evenings are perfect for stargazing and outdoor dining.

August: Late Summer

August remains warm, with average temperatures around 76.8°F. Precipitation is slightly lower at 4.10 inches, typically from late-day thunderstorms.

Natural Disasters: Thunderstorms and the associated risks, such as lightning and flash flooding, continue to be concerns.

Activities: August is great for enjoying the last full month of summer. Outdoor activities like hiking, fishing, and camping are popular. The warm weather is also perfect for attending local fairs and festivals. Water sports on nearby lakes offer a refreshing break from the heat.

September: Early Fall

September brings cooler temperatures, averaging 69.8°F. Precipitation decreases to 3.90 inches, and the weather is generally mild and pleasant.

Natural Disasters: The risk of thunderstorms decreases, but early fall storms can still bring heavy rain and wind.

Activities: September is ideal for outdoor activities as the weather becomes more comfortable. Hiking, biking, and exploring local trails are popular. The start of the fall foliage season attracts photographers and nature enthusiasts. Local harvest festivals celebrate the season with fresh produce and crafts.

October: Fall Colors

October is characterized by cooler temperatures, averaging 58.1°F, and 3.40 inches of precipitation. The vibrant fall foliage peaks, creating stunning landscapes.

Natural Disasters: Early winter storms can sometimes occur, bringing unexpected rain or hail.

Activities: October is perfect for enjoying the fall colors through scenic drives, hiking, and photography. Pumpkin patches, corn mazes, and local Halloween events provide seasonal entertainment. Visiting cider mills and farmers’ markets offers a taste of autumn.

November: Approach of Winter

November brings colder temperatures, averaging 47.2°F, and precipitation increases to 3.20 inches. The first frosts of the season can occur.

Natural Disasters: Early winter storms can disrupt travel and daily activities, with potential for heavy rain and icy conditions.

Activities: November is a good time for indoor activities as the weather becomes colder. Visiting local museums, attending community theater productions, and enjoying holiday shopping are popular. Preparing for winter sports by checking and maintaining equipment is also recommended.

December: Winter Returns

December sees the return of winter, with average temperatures around 36.4°F. Precipitation averages 3.60 inches, mostly as rain, but occasional snow can create a festive winter landscape.

Natural Disasters: Winter storms can bring heavy rainfall, impacting travel and daily life. Ice storms are also possible, causing power outages and hazardous conditions.

Activities: December is perfect for winter sports like ice skating and holiday events. Holiday markets and festivals add to the festive atmosphere. Indoor activities such as visiting local holiday markets and enjoying warm meals at cozy restaurants are popular.