The best times to visit Delaware for ideal weather are

April 23rd to June 24th

or

August 20th to October 28th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

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Weather in Delaware

Temperature

Average temperatures in Delaware vary drastically. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 55th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Delaware, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 87°F (30.6°C) with temperatures rarely dropping below 71.1°F (21.7°C) at night.

Delaware Temperatures (Fahrenheit)

Key
High
Average
Low

Delaware Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Delaware Perceived Temperature (F)

Key
High
Average
Low

Delaware Perceived Temperature (C)

Key
High
Average
Low

 

Average Delaware Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 41.9 34.3 27.9
Feb 43.2 34.9 28.1
Mar 53 43.7 36.3
Apr 64.4 54.4 46.2
May 74.1 64.4 56.5
Jun 82 73.2 65.6
Jul 86 77.4 70
Aug 83.4 75.3 68.2
Sep 78 69.7 62.7
Oct 67.5 59 51.9
Nov 56.2 48.1 41.2
Dec 48.3 40.9 34.7

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 5.5 1.3 -2.3
Feb 6.2 1.6 -2.2
Mar 11.7 6.5 2.4
Apr 18 12.4 7.9
May 23.4 18 13.6
Jun 27.8 22.9 18.7
Jul 30 25.2 21.1
Aug 28.6 24.1 20.1
Sep 25.6 20.9 17.1
Oct 19.7 15 11.1
Nov 13.4 8.9 5.1
Dec 9.1 4.9 1.5


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Delaware are September, January, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid to late September. For example, on the week of September 17th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late December with an average of 1 days of significant precipitation the week of December 24th.

When can you find snow in Delaware? Weather stations report large amounts of snow likely to be deepest around December, especially close to mid December. The best time to ski (if at all) in Delaware is often around around December 17th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chanceof Precipitation

The graph below shows the % chance of rainy and snowy days in Delaware.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Delaware (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 8% 2.5 1.4
Feb 9% 4.8 1.1
Mar 11% 3.6 1.7
Apr 11% 0 1.8
May 10% 0 1.3
Jun 11% 0 2.3
Jul 9% 0 1.8
Aug 10% 0 2
Sep 8% 0 1.6
Oct 10% 0 2.1
Nov 9% 0 1.2
Dec 12% 5.1 2.2

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 8 6.4 3.6
Feb 9 12.2 2.8
Mar 11 9.1 4.3
Apr 11 0 4.6
May 10 0 3.3
Jun 11 0 5.8
Jul 9 0 4.6
Aug 10 0 5.1
Sep 8 0 4.1
Oct 10 0 5.3
Nov 9 0 3
Dec 12 13 5.6

 

Humidity and Wind

Delaware has some high humidity months, with other comfortably humid months. The least humid month is February (53.6% relative humidity), and the most humid month is September (66.2%).

Wind in Delaware is usually calm. The windiest month is February, followed by March and April. February’s average wind speed of around 7.9 knots (9.1 MPH or 14.6 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid February where average top sustained speeds reach 16.9 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Delaware.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 7.3 Gentle breeze 14.8 Significant breeze
Feb 7.9 Gentle breeze 16.1 Significant breeze
Mar 7.7 Gentle breeze 15.5 Significant breeze
Apr 7.7 Gentle breeze 15.6 Significant breeze
May 6.5 Light breeze 13.6 Significant breeze
Jun 6 Light breeze 13.4 Significant breeze
Jul 5.5 Light breeze 12.3 Significant breeze
Aug 5.2 Light breeze 11.8 Significant breeze
Sep 6 Light breeze 12.6 Significant breeze
Oct 6.7 Light breeze 13.8 Significant breeze
Nov 6.9 Light breeze 14 Significant breeze
Dec 7.3 Gentle breeze 14.7 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 55.2%
Feb 53.6%
Mar 53.6%
Apr 53.9%
May 62.6%
Jun 63.4%
Jul 62.8%
Aug 65.7%
Sep 66.2%
Oct 65.2%
Nov 61.4%
Dec 63.7%

 

Is it Safe to Travel to Delaware?

Our best data indicates this area is generally safe. As of Jan 19, 2018 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories


 

The Busiest and Least Crowded Months

The busiest month for tourism in Delaware, United States is June, followed by July and August. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Delaware in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is very reliable. Displayed data is calculated relative to the peak, so a score of 34.5 in November means 34.5% of the tourists vs. June.


Overall Delaware Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 81°F (27.2°C) and 45.3°F (7.4°C) with far warmer temperatures in the later months. Rain is rare with roughly 3 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with about 3 days of precipitation per month. June – August is the busiest season for tourism in Delaware, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 82.4°F (28°C) and 52.9°F (11.6°C), which will feel comfortable given the humidity and wind. It rains or snows a normal amount: 2 to 3 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is too cold this time of year in Delaware to be enjoyable for warm weather travelers. The average high during this season is between 49.4°F (9.7°C) and 38.7°F (3.7°C). On average, it rains or snows a smalll amount: 3 to 4 times per month. These times of year are the slowest with tourists.

 

Best Times to Travelthe United States › Delaware, United States

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