Delmar · Weather, flooding and hazards

Delmar, Delaware: weather, flooding and hazards

Weather, climate, flooding and hazards in Delmar, Sussex County, Delaware: 17 questions answered from NOAA, the state and other official sources.

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Questions about weather, flooding and hazards in Delmar

What is the climate like in Delmar, Delaware?

Using NOAA 1991 to 2020 climate normals from the Salisbury, Maryland (Wicomico Regional Airport) station, the nearest of the stations we use, the average January low is 28.0 degrees F and the average July high is 87.5 degrees F. Annual precipitation averages 47.49 inches. The station is not inside Delmar, so readings in town can differ a little, especially near the water. Source: ncei.noaa.gov.

How much snow does Delmar get per year?

The 1991 to 2020 normal for the Salisbury, Maryland (Wicomico Regional Airport) station, the nearest station we use, is 8.0 inches of snow a year. Individual winters vary a lot around that average. Source: ncei.noaa.gov.

Is Delmar in a flood zone?

Part of Delmar may sit in a FEMA Special Flood Hazard Area, and the answer depends on the address, so we do not give a town-wide yes or no. The USGS elevation at the town's Census center point is about 48 feet. Look up a specific property in the FEMA Flood Map Service Center and the DNREC Delaware Flood Planning Tool. Source: msc.fema.gov, floodplanning.dnrec.delaware.gov, epqs.nationalmap.gov.

Is Delmar in a hurricane evacuation zone?

Delaware labels hurricane evacuation zones A, B, C and D, and describes them as low-lying areas susceptible to flooding and storm surge. The state page does not list communities by zone, so we cannot say which zone Delmar or a given address falls in. Use the Know Your Zone lookup tool or interactive map to check an address. Source: preparede.org, dema.delaware.gov.

What body of water is Delmar on?

The Census Gazetteer lists 0 square miles of water area within Delmar's town limits, so we do not list a named river, bay or ocean for the town. Source: www2.census.gov.

How big is Delmar and how high above sea level is it?

The 2020 Census Gazetteer lists Delmar at 1.901 square miles of land and 0 square miles of water. Elevation at the Census center point is about 48 feet above sea level (USGS 3DEP), and ground height varies across town. Source: www2.census.gov, epqs.nationalmap.gov.

Which National Weather Service forecast zone covers Delmar?

The National Weather Service (Mount Holly office) places Delmar in forecast zone DEZ003, Inland Sussex, Delaware. This was read from the NWS point forecast page for the town's Census center point. Source: forecast.weather.gov.

Which month is the wettest in Delmar and which is the driest?

Using NOAA 1991 to 2020 normals from the Salisbury, Maryland (Wicomico Regional Airport) station, August is the wettest month at 5.27 inches and November is the driest at 3.16 inches. The Salisbury, Maryland (Wicomico Regional Airport) station is not inside Delmar, so readings in town can differ. Source: ncei.noaa.gov.

How many 90 degree days does Delmar get in a typical year?

Using NOAA 1991 to 2020 normals from the Salisbury, Maryland (Wicomico Regional Airport) station, the station averages 30.4 days a year with a high of 90 degrees F or more, and 0.6 days at 100 degrees F or more. The Salisbury, Maryland (Wicomico Regional Airport) station is not inside Delmar, so readings in town can differ. Source: ncei.noaa.gov.

How many days a year does it rain in Delmar?

Using NOAA 1991 to 2020 normals from the Salisbury, Maryland (Wicomico Regional Airport) station, the station averages 122.3 days a year with at least 0.01 inch of precipitation, 12.4 days with at least 1.00 inch and 2.8 days with at least 2.00 inches. The Salisbury, Maryland (Wicomico Regional Airport) station is not inside Delmar, so readings in town can differ. Source: ncei.noaa.gov.

When are the first and last freezes of the year in Delmar?

Using NOAA 1991 to 2020 normals from the Salisbury, Maryland (Wicomico Regional Airport) station, NOAA lists April 10 as the 50 percent probability date for the last spring freeze (32 degrees F or lower) and October 30 for the first fall freeze, a growing season of 201 days at that probability. The Salisbury, Maryland (Wicomico Regional Airport) station is not inside Delmar, so readings in town can differ. Source: ncei.noaa.gov.

What is the average yearly temperature in Delmar?

Using NOAA 1991 to 2020 normals from the Salisbury, Maryland (Wicomico Regional Airport) station, the annual normal temperature is 56.9 degrees F, with an average daily high of 66.9 and an average daily low of 47.0. The Salisbury, Maryland (Wicomico Regional Airport) station is not inside Delmar, so readings in town can differ. Source: ncei.noaa.gov.

How many nights a year fall to freezing in Delmar?

Using NOAA 1991 to 2020 normals from the Salisbury, Maryland (Wicomico Regional Airport) station, the station averages 93.6 days a year with a low of 32 degrees F or colder. The Salisbury, Maryland (Wicomico Regional Airport) station is not inside Delmar, so readings in town can differ. Source: ncei.noaa.gov.

How big are heating and cooling needs in Delmar over a year?

Using NOAA 1991 to 2020 normals from the Salisbury, Maryland (Wicomico Regional Airport) station, the annual normals are 4210.0 heating degree days and 1300.9 cooling degree days, standard measures of how much heating and cooling a year calls for. The Salisbury, Maryland (Wicomico Regional Airport) station is not inside Delmar, so readings in town can differ. Source: ncei.noaa.gov.

Which month is snowiest in Delmar?

Using NOAA 1991 to 2020 normals from the Salisbury, Maryland (Wicomico Regional Airport) station, February is the snowiest month at 3.4 inches, followed by January at 2.5 inches. Individual winters vary a lot. The Salisbury, Maryland (Wicomico Regional Airport) station is not inside Delmar, so readings in town can differ. Source: ncei.noaa.gov.

How long would a hurricane evacuation take in Sussex County, where Delmar is?

Delaware's 2023 Sussex County Evacuation Plan says it is estimated to take over 24 hours to evacuate a large population. It also states that approximately ninety percent of Delaware's coastal storm flood-vulnerable housing units (Category 2 hurricane) are in Sussex County. Source: deldot.gov.

Which evacuation routes does the state list near Delmar?

Delaware's 2023 Sussex County Evacuation Plan lists US 13 among primary north-south routes and DE 54 among primary east-west routes. The plan does not mention Delmar by name. Source: deldot.gov.

How these answers are sourced

Every answer on this page cites an official or primary source, such as the town, a state agency, NOAA or the institution itself. Answers SussexCounty.ai could not confirm from a primary source are left out until they can be.