In New Gretna, July heat, January chill and rainfall all sit near the middle of U.S. towns
The coldest hours of a January night bottom out at 26° on average. Expect the heaviest rain or snow in August and the lightest in February. It is a wet place: more rain and snow fall here than on 67% of U.S. towns. The frost-free window for a garden runs roughly April 18 to October 29.
A year in New Gretna at a glance
Each month’s typical high and low, and what it brings.
What stands out about New Gretna’s climate
Compared with towns across the U.S., with New Gretna’s place in New Jersey beside it.
What a year in New Gretna feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 190 frost-free days a year
In half of years the last 32° night comes by April 18 and the first by October 29. Frost and day counts come from NOAA’s station at Atlantic City International Airport, 11 miles from the town’s center, at about the same height.
The 2023 USDA map puts New Gretna’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 5°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 17 inches of snow a winter
Snow, measured at Atlantic City International Airport, is heaviest from January through February, about 6 inches a month. Precipitation (rain plus melted snow) adds up to 46 inches a year; August is the wettest month and February the driest. Rain or snow falls on about 120 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in New Gretna
81% of the work is heating. Months averaging under 55° run from November through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Atlantic City International Airport.
Living with New Gretna’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
190 frost-free days in zone 7a. The last frost comes by Apr 18 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 29.
Months with highs of 62–84° and lows of 40° or more: April, May, June, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in New Gretna from natural hazards, river flooding is the largest share (37%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →New Gretna and similar climates
TownRatings has no climate map of the towns around New Gretna yet.
Climates most like New Gretna’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| New Gretna, NJ | 26° | 85° | 46" | 17" |
| Withamsville, OH | 23° | 86° | 46" | 16" |
| Woodfin, NC | 27° | 85° | 46" | 12" |
| Independence, KY | 23° | 86° | 46" | 23" |
| Massanetta Springs, VA | 24° | 85° | 43" | 19" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in New Gretna averaged 2.1° warmer than the 1900s. The biggest change is in December (+3.3°).
A bigger shift than in 93% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How New Gretna compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with New Gretna’s place among New Jersey’s.
New Gretna weather by month
Highs, lows and precipitation from NOAA’s grid at New Gretna’s center; snow, wet days and snow on the ground from Atlantic City International Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 43° | 26° | 3.5" | 5.7" | 11 | 4 | 27° – 41° |
| February | 45° | 27° | 3.1" | 5.9" | 10 | 4 | 25° – 43° |
| March | 51° | 33° | 4.5" | 2.2" | 11 | 1 | 37° – 51° |
| April | 62° | 42° | 3.4" | 0.3" | 11 | 0 | 48° – 57° |
| May | 71° | 51° | 3.4" | 0.0" | 11 | 0 | 57° – 66° |
| June | 81° | 61° | 3.8" | 0.0" | 10 | 0 | 66° – 75° |
| July | 85° | 67° | 4.6" | 0.0" | 10 | 0 | 72° – 80° |
| August | 84° | 66° | 4.6" | 0.0" | 9 | 0 | 70° – 79° |
| September | 78° | 59° | 3.7" | 0.0" | 9 | 0 | 65° – 72° |
| October | 67° | 47° | 3.9" | 0.0" | 9 | 0 | 52° – 64° |
| November | 56° | 38° | 3.3" | 0.1" | 9 | 0 | 41° – 52° |
| December | 47° | 30° | 4.5" | 3.2" | 11 | 1 | 31° – 51° |
| Year | 64° | 45° | 46.4" | 17.4" | 120 | 10 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 31° to 51°. July is the most reliable, staying within 7°.
Where New Gretna’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at New Gretna’s center.
- Snow: Atlantic City International Airport.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Atlantic City International Airport, 11 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about New Gretna’s climate
What is the weather like in New Gretna?
A typical July afternoon reaches 85°, a January night drops to 26°, and about 17 inches of snow falls in a normal winter. Milder January nights than 65% of U.S. towns; hotter July afternoons than 51% of U.S. towns.
How cold does it get in New Gretna in winter?
January nights average 26°. About 101 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 27°.
How much snow does New Gretna get?
About 17 inches in a normal winter at Atlantic City International Airport, heaviest from January through February, about 6 inches a month, with snow on the ground about 10 days a year.
How hot does it get in New Gretna?
July, with a typical high of 85° and a low of 67°. About 23 days a year reach 90° (Atlantic City International Airport).
When is the first and last frost in New Gretna?
In half of years the last spring frost (32°) comes by April 18 and the first fall frost by October 29, about 190 frost-free days, at Atlantic City International Airport.
What growing zone is New Gretna in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 5°.
What is the best time of year to visit New Gretna?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is New Gretna getting warmer?
Yes: 1991–2020 averaged 2.1° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 93% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in New Gretna.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.