Newark, Delaware climate: Normal weather by month, frost dates and records
Newark's normal year runs from 25°F January nights to 89°F July afternoons, with 47.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.2°C, January lows of −4°C, July highs of 31°C, 1,193 mm of precipitation a year.
- NOAA stationNewark Agricultural Farm
- Station IDUSC00076410
- Location39.67°N 75.75°W
- Elevation106 ft (32 m)
- From the centerunder 1 mile
- Population30,506
On October 14, the normal high in Newark is 70°F and the normal low 47°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Newark.
- Jan 43° 25°
- Feb 46° 25°
- Mar 54° 33°
- Apr 67° 42°
- May 76° 52°
- Jun 84° 62°
- Jul 89° 66°
- Aug 87° 65°
- Sep 79° 58°
- Oct 69° 46°
- Nov 57° 36°
- Dec 47° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Newark each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 25°F. The most precipitation falls in September (4.87 in), the least in February (2.91 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 43°F | 25°F | 33.8°F | 3.43 | 9 | <1 | 24 | 9 h 40 min |
| February | 46°F | 25°F | 35.5°F | 2.91 | 8 | <1 | 21 | 10 h 40 min |
| March | 54°F | 33°F | 43.5°F | 4.27 | 11 | <1 | 16 | 11 h 50 min |
| April | 67°F | 42°F | 54.5°F | 3.71 | 11 | <1 | 4 | 13 h 10 min |
| May | 76°F | 52°F | 63.8°F | 3.63 | 11 | 2 | <1 | 14 h 20 min |
| June | 84°F | 62°F | 72.6°F | 3.95 | 9 | 7 | <1 | 15 h |
| July | 89°F | 66°F | 77.5°F | 4.84 | 9 | 13 | <1 | 14 h 40 min |
| August | 87°F | 65°F | 75.7°F | 3.95 | 8 | 8 | <1 | 13 h 50 min |
| September | 79°F | 58°F | 68.9°F | 4.87 | 8 | 2 | <1 | 12 h 30 min |
| October | 69°F | 46°F | 57.7°F | 4.00 | 7 | <1 | 1 | 11 h 10 min |
| November | 57°F | 36°F | 46.4°F | 3.36 | 8 | <1 | 11 | 10 h |
| December | 47°F | 30°F | 38.4°F | 4.04 | 10 | <1 | 21 | 9 h 20 min |
| Year (annual) | 66°F | 45°F | 55.7°F | 46.96 | 111 | 33 | 97 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 6°C | −4°C | 1.0°C | 87 mm |
| February | 8°C | −4°C | 1.9°C | 74 mm |
| March | 12°C | 0°C | 6.4°C | 108 mm |
| April | 19°C | 6°C | 12.5°C | 94 mm |
| May | 24°C | 11°C | 17.7°C | 92 mm |
| June | 29°C | 16°C | 22.6°C | 100 mm |
| July | 31°C | 19°C | 25.3°C | 123 mm |
| August | 30°C | 18°C | 24.3°C | 100 mm |
| September | 26°C | 15°C | 20.5°C | 124 mm |
| October | 21°C | 8°C | 14.3°C | 102 mm |
| November | 14°C | 2°C | 8.0°C | 85 mm |
| December | 8°C | −1°C | 3.6°C | 103 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Wilmington (8 miles away), gets 20 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00076410; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Newark?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, October has the fewest days with rain (7).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00076410.
When is the last frost in Newark?
In Newark, the last spring frost (32°F) comes after April 7 in half of years and after April 21 in one year in ten; the first autumn frost comes before November 2 in half of years and before October 19 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 71 year in 10 after April 21; 9 in 10 after March 26
- First autumn frost, half of years before
- November 21 year in 10 before October 19; 9 in 10 before November 17
NOAA puts the median frost-free season at 208 days, and the season without a hard freeze (28°F) at 231 days.
A hard freeze (28°F) comes after March 27 in half of springs and before November 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Newark in zone 7b across its 4 ZIP code areas (7b in 19711, the largest).
Frost dates for every NOAA station in Delaware · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00076410; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
What hardiness zone is each Newark ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Newark's 4 ZIP code areas are all in zone 7b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Newark?
In a normal year in Newark, 33 days a year reach 90°F (1 of them 100°F or more), 97 nights fall to 32°F or colder and 111 days bring measurable precipitation.
- Days at 90°F or more
- 33a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 97a normal year
- Days that stay below freezing
- 10high of 32°F or less
- Days with 0.01 inch of precipitation
- 111a normal year
The highest temperature in this station's record (since 1894) is 105°F, on July 16, 1983; the lowest is −12°F, on February 11, 1899.
The wettest calendar year on that record is 1996, with 60.52 in; the snowiest season is 1978–79, with 35.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00076410; records: ACIS (NOAA Regional Climate Centers), station USC00076410. Records use complete months only; a month missing more than three days is left out.
How sunny is Newark?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Newark, 4.1 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 68% | 2.0 |
| February | 71% | 2.9 |
| March | 69% | 3.8 |
| April | 73% | 5.0 |
| May | 72% | 5.6 |
| June | 78% | 6.2 |
| July | 82% | 6.2 |
| August | 80% | 5.4 |
| September | 77% | 4.4 |
| October | 73% | 3.2 |
| November | 74% | 2.3 |
| December | 68% | 1.8 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Newark need?
A normal year in Newark brings 4,591 heating degree days, 15% fewer than the median U.S. place (5,373), and 1,234 cooling degree days, 36% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,866 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 967 | 0 |
| February | 826 | 0 |
| March | 667 | 1 |
| April | 329 | 14 |
| May | 119 | 80 |
| June | 11 | 240 |
| July | 0 | 387 |
| August | 1 | 334 |
| September | 37 | 154 |
| October | 251 | 23 |
| November | 559 | 1 |
| December | 825 | 0 |
| Year (annual) | 4,591 | 1,234 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00076410. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Newark been warmer than normal lately?
2025 averaged 54.1°F, 1.6°F below the 1991-2020 normal of 55.7°F. 2 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 55.6°F | −0.1°F | – |
| 2022 | 54.3°F | −1.4°F | – |
| 2023 | 55.8°F | +0.1°F | 46.49 |
| 2024 | 56.0°F | +0.3°F | 46.04 |
| 2025 | 54.1°F | −1.6°F | 39.07 |
Source: observed years: ACIS, station USC00076410. A year counts only with all twelve months complete.
How does Newark's climate compare?
Newark is warmer than 2 of the other 5 places with their own NOAA record in Delaware, and wetter than 3. Across the 7,247 U.S. stations with normals, its annual mean of 55.7°F is warmer than 63%.
In the Köppen classification computed from these normals, Newark is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Newark share this climate record?
11 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Bear, DE22,604 people · 5 mi SE
- Glasgow, DE16,095 people · 5 mi S
- Elkton, MD15,977 people · 6 mi SW
- Brookside, DE15,262 people · 2 mi E
- North East, MD4,191 people · 11 mi W
- West Grove, PA2,831 people · 11 mi NW
- Lincoln University, PA1,976 people · 14 mi NW
- Charlestown, MD1,538 people · 14 mi SW
- Chesapeake City, MD745 people · 10 mi S
- Toughkenamon, PA724 people · 11 mi N
- Cecilton, MD688 people · 19 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Newark's climate
What is the coldest month in Newark?
January, with a normal high of 43°F and a normal low of 25°F. The warmest is July (89°F by day, 66°F at night).
Does it snow in Newark?
Yes. NOAA publishes no 1991-2020 snowfall normal for Newark's NOAA station; the nearest record that keeps one, Wilmington (8 miles away), records 20 inches of snow in a normal year.
What is the rainiest month in Newark?
September, with 4.87 in of precipitation in a normal year; the driest is February with 2.91 in.
What plant hardiness zone is Newark in?
The USDA's 2023 map puts Newark in zone 7b across its 4 ZIP code areas (7b in 19711, the largest).
How late can frost come in Newark?
In half of years the last 32°F night comes after April 7; in one year in ten it comes after April 21. Waiting until April 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Newark in OctoberThis month day by day, its records and recent years
- Delaware climateThe statewide normals and every place in the state
- Wilmington, DE7 miles from this station, 55.5°F a year
- Wilmington Porter Research, DE13 miles from this station, 53.4°F a year
- Avondale, PA14 miles from this station, 52.3°F a year
- Octoraro Lake, PA18 miles from this station, 52.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made