Delaware Weather by Month: Temperature & Rainfall Guide

Delaware is a region in the United States of America. Many people wonder what the weather conditions are in Delaware over the year. What is the best time to visit Delaware?

This page shows the average weather conditions by month in Delaware over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Delaware is generally less favorable. January is a winter month. The average maximum daytime temperatures are low and range from 4°C (39°F) in Talleyville to 7°C (45°F) in Seaford. On average, this month is the coldest month of the year in Delaware.

Find more detailed climate information for Delaware in January here.

In February the weather in Delaware is generally less favorable. February is a winter month. The average maximum daytime temperatures are low and range from 5°C (41°F) in Talleyville to 8°C (46°F) in Seaford.

Find more detailed climate information for Delaware in February here.

In March the weather in Delaware is generally mixed. The temperatures range from low in Talleyville with 11°C (52°F) to moderate in Seaford with 13°C (55°F).

Find more detailed climate information for Delaware in March here.

In April the weather in Delaware is generally very good. The temperatures range from moderate in Fenwick Island with 17°C (63°F) to pleasant in Seaford with 19°C (66°F).

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In May the weather in Delaware is generally excellent. The average maximum daytime temperatures are high and range from 22°C (72°F) in Fenwick Island to 24°C (75°F) in Seaford.

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In June the weather in Delaware is generally very good. June is a summer month. In Dover you can expect warm maximum average daytime temperatures around 28°C (82°F) and nighttime temperatures around 18°C (64°F).

Find more detailed climate information for Delaware in June here.

In July the weather in Delaware is generally good. July is a summer month. In Dover you can expect very warm maximum average daytime temperatures around 31°C (88°F) and nighttime temperatures around 21°C (70°F). On average, this month is one of the warmest months of the year in Delaware. So be prepared and make sure to dress lightly.

Find more detailed climate information for Delaware in July here.

In August the weather in Delaware ranges from good in Seaford to very good in Dover. August is a summer month. In Dover you can expect warm maximum average daytime temperatures around 29°C (84°F) and nighttime temperatures around 20°C (68°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Delaware in August here.

In September the weather in Delaware is generally very good. In Dover you can expect warm maximum average daytime temperatures around 26°C (79°F) and nighttime temperatures around 16°C (61°F).

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In October the weather in Delaware ranges from good in Newark to very good in Dover. The average maximum daytime temperatures are pleasant and range from 19°C (66°F) in Talleyville to 21°C (70°F) in Seaford.

Find more detailed climate information for Delaware in October here.

In November the weather in Delaware ranges from mixed in Newark to good in Dover. The average maximum daytime temperatures are moderate and range from 12°C (54°F) in Talleyville to 15°C (59°F) in Seaford.

Find more detailed climate information for Delaware in November here.

In December the weather in Delaware is generally less favorable. December is a winter month. The average maximum daytime temperatures are low and range from 8°C (46°F) in Talleyville to 11°C (52°F) in Seaford.

Find more detailed climate information for Delaware in December here.