Greenwood, Delaware climate: Normal weather by month, frost dates and records
Greenwood's normal year runs from 25°F January nights to 87°F July afternoons, with 46.3 inches of precipitation and 13 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.0°C, January lows of −4°C, July highs of 30°C, 1,176 mm of precipitation a year.
- NOAA stationGreenwood (2 mi NE)
- Station IDUSC00073595
- Location38.82°N 75.58°W
- Elevation45 ft (14 m)
- From the center1 miles
- Population1,123
On October 24, the normal high in Greenwood is 65°F and the normal low 44°F, and the chance of measurable rain or snow is 27%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Greenwood.
- Jan 44° 25°
- Feb 46° 26°
- Mar 54° 33°
- Apr 65° 42°
- May 73° 52°
- Jun 82° 62°
- Jul 87° 67°
- Aug 85° 65°
- Sep 79° 58°
- Oct 68° 46°
- Nov 57° 37°
- Dec 48° 29°
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 Greenwood each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 25°F. The most precipitation falls in September (4.77 in), the least in February (2.91 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 44°F | 25°F | 34.5°F | 3.61 | 3.3 | 9 | <1 | 23 | 9 h 40 min |
| February | 46°F | 26°F | 36.0°F | 2.91 | 5.9 | 8 | <1 | 22 | 10 h 40 min |
| March | 54°F | 33°F | 43.4°F | 4.01 | 1.6 | 11 | <1 | 15 | 11 h 50 min |
| April | 65°F | 42°F | 53.5°F | 3.44 | 0.2 | 10 | <1 | 4 | 13 h 10 min |
| May | 73°F | 52°F | 62.6°F | 3.67 | 0.0 | 10 | 1 | <1 | 14 h 20 min |
| June | 82°F | 62°F | 71.9°F | 4.19 | 0.0 | 10 | 4 | <1 | 14 h 50 min |
| July | 87°F | 67°F | 76.7°F | 4.01 | 0.0 | 9 | 9 | <1 | 14 h 40 min |
| August | 85°F | 65°F | 74.9°F | 4.50 | 0.0 | 8 | 7 | <1 | 13 h 40 min |
| September | 79°F | 58°F | 68.4°F | 4.77 | 0.0 | 8 | 1 | <1 | 12 h 30 min |
| October | 68°F | 46°F | 57.2°F | 4.23 | 0.0 | 9 | <1 | 2 | 11 h 20 min |
| November | 57°F | 37°F | 47.2°F | 3.19 | 0.0 | 8 | <1 | 10 | 10 h 10 min |
| December | 48°F | 29°F | 38.8°F | 3.78 | 1.8 | 10 | <1 | 21 | 9 h 30 min |
| Year (annual) | 66°F | 45°F | 55.4°F | 46.31 | 12.8 | 112 | 22 | 96 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 6°C | −4°C | 1.4°C | 92 mm | 8 cm |
| February | 8°C | −3°C | 2.2°C | 74 mm | 15 cm |
| March | 12°C | 0°C | 6.3°C | 102 mm | 4 cm |
| April | 18°C | 6°C | 11.9°C | 87 mm | 1 cm |
| May | 23°C | 11°C | 17.0°C | 93 mm | 0 cm |
| June | 28°C | 16°C | 22.2°C | 106 mm | 0 cm |
| July | 30°C | 19°C | 24.8°C | 102 mm | 0 cm |
| August | 29°C | 18°C | 23.8°C | 114 mm | 0 cm |
| September | 26°C | 14°C | 20.2°C | 121 mm | 0 cm |
| October | 20°C | 8°C | 14.0°C | 107 mm | 0 cm |
| November | 14°C | 3°C | 8.4°C | 81 mm | 0 cm |
| December | 9°C | −1°C | 3.8°C | 96 mm | 5 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00073595; 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 Greenwood?
Normal highs sit between 65°F and 85°F in May, June, August, September and October. Of those, August has the fewest days with rain (8).
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 USC00073595.
When is the last frost in Greenwood?
In Greenwood, the last spring frost (32°F) comes after April 11 in half of years and after April 28 in one year in ten; the first autumn frost comes before October 30 in half of years and before October 14 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 111 year in 10 after April 28; 9 in 10 after March 29
- First autumn frost, half of years before
- October 301 year in 10 before October 14; 9 in 10 before November 13
NOAA puts the median frost-free season at 200 days, and the season without a hard freeze (28°F) at 227 days.
A hard freeze (28°F) comes after March 30 in half of springs and before November 11 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Greenwood in zone 7b in ZIP code 19950, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Greenwood's NOAA station is in zone 7b: the coldest night of a typical year reaches 7°F (19 complete years).
Frost dates for every NOAA station in Delaware · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00073595; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Greenwood?
In a normal year in Greenwood, 22 days a year reach 90°F, 96 nights fall to 32°F or colder and 112 days bring measurable precipitation.
- Days at 90°F or more
- 22a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 96a normal year
- Days that stay below freezing
- 11high of 32°F or less
- Days with 0.01 inch of precipitation
- 112a normal year
- Days with 1 inch of snow or more
- 4a normal year
The highest temperature in this station's record (since 1986) is 101°F, on June 22, 1988; the lowest is −8°F, on January 28, 1987.
The wettest calendar year on that record is 2003, with 57.36 in; the snowiest season is 2009–10, with 49.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00073595; records: ACIS (NOAA Regional Climate Centers), station USC00073595. Records use complete months only; a month missing more than three days is left out.
How sunny is Greenwood?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Greenwood, 4.2 kWh per square metre a day. July is the sunniest month (83%) and January the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.2 |
| February | 71% | 3.0 |
| March | 71% | 4.0 |
| April | 75% | 5.2 |
| May | 75% | 5.8 |
| June | 80% | 6.3 |
| July | 83% | 6.2 |
| August | 81% | 5.5 |
| September | 77% | 4.5 |
| October | 75% | 3.3 |
| November | 75% | 2.5 |
| December | 71% | 1.9 |
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 Greenwood need?
A normal year in Greenwood brings 4,592 heating degree days, 15% fewer than the median U.S. place (5,373), and 1,135 cooling degree days, 25% 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 3,757 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 945 | 0 |
| February | 812 | 0 |
| March | 670 | 1 |
| April | 356 | 13 |
| May | 140 | 65 |
| June | 19 | 225 |
| July | 0 | 363 |
| August | 1 | 306 |
| September | 39 | 141 |
| October | 262 | 20 |
| November | 534 | 2 |
| December | 814 | 0 |
| Year (annual) | 4,592 | 1,135 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00073595. 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.
How does Greenwood's climate compare?
Greenwood is warmer than 0 of the other 5 places with their own NOAA record in Delaware, and wetter than 2. Across the 7,247 U.S. stations with normals, its annual mean of 55.4°F is warmer than 62%.
In the Köppen classification computed from these normals, Greenwood 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 Greenwood share this climate record?
18 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.
- Milford, DE14,079 people · 11 mi NE
- Denton, MD5,049 people · 14 mi W
- Harrington, DE3,934 people · 7 mi N
- Bridgeville, DE2,909 people · 6 mi S
- Federalsburg, MD2,871 people · 14 mi SW
- Greensboro, MD1,969 people · 17 mi NW
- Ridgely, MD1,646 people · 19 mi NW
- Lincoln, DE1,639 people · 9 mi NE
- Preston, MD688 people · 19 mi W
- Ellendale, DE556 people · 8 mi E
- Cordova, MD427 people · 23 mi W
- Houston, DE404 people · 8 mi NE
- Williston, MD302 people · 15 mi W
- Queen Anne, MD192 people · 21 mi W
- Hillsboro, MD135 people · 21 mi W
- Choptank, MD114 people · 22 mi SW
- Farmington, DE100 people · 4 mi N
- West Denton, MD32 people · 15 mi W
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 Greenwood's climate
What is the coldest month in Greenwood?
January, with a normal high of 44°F and a normal low of 25°F. The warmest is July (87°F by day, 67°F at night).
Does it snow in Greenwood?
Yes: 13 inches in a normal year, falling on 5 days with 0.1 inch or more, the most in February (5.9 inches).
What is the rainiest month in Greenwood?
September, with 4.77 in of precipitation in a normal year; the driest is February with 2.91 in.
What plant hardiness zone is Greenwood in?
The USDA's 2023 map puts Greenwood in zone 7b in ZIP code 19950, the nearest ZIP area. By the same method at Greenwood's NOAA station, the coldest night of a typical year reaches 7°F (19 years, 1991-2020): zone 7b.
How late can frost come in Greenwood?
In half of years the last 32°F night comes after April 11; in one year in ten it comes after April 28. Waiting until April 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Delaware climateThe statewide normals and every place in the state
- Georgetown, DE15 miles from this station, 57.6°F a year
- Lewes, DE22 miles from this station, 58.5°F a year
- Dover, DE23 miles from this station, 57.1°F a year
- Vienna, MD26 miles from this station, 58.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made