Perth Amboy, New Jersey climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put Perth Amboy's center at January lows of 26°F and July highs of 86°F, a yearly mean of 54.9°F and 47.8 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Ny Ave V Brooklyn (16 miles E, 20 ft), has January lows of 28°F and July highs of 85°F.
56,939 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 41° 26°
- Feb 43° 27°
- Mar 51° 33°
- Apr 62° 43°
- May 72° 52°
- Jun 81° 62°
- Jul 86° 68°
- Aug 84° 66°
- Sep 78° 60°
- Oct 66° 48°
- Nov 55° 38°
- Dec 46° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
The months above are NOAA's gridded normals at Perth Amboy's center.
What is each month like in Perth Amboy?
NOAA's grid estimates the normals every 5 km or so from the stations around each point, terrain included. It smooths between stations, so night lows at the heart of a large city can run warmer than the grid shows: at five big-city airports we compared, the grid's highs were within about 1°F of the station and its lows 1-6°F cooler. The nearest record's high and low are beside each month.
| Month | High | Low | Mean | Precip. | Ny Ave V Brooklyn high | Ny Ave V Brooklyn low |
|---|---|---|---|---|---|---|
| January | 41°F | 26°F | 33.2°F | 3.53 | 40°F | 28°F |
| February | 43°F | 27°F | 35.0°F | 2.89 | 42°F | 29°F |
| March | 51°F | 33°F | 41.9°F | 4.23 | 50°F | 35°F |
| April | 62°F | 43°F | 52.4°F | 3.73 | 61°F | 45°F |
| May | 72°F | 52°F | 62.1°F | 4.02 | 71°F | 54°F |
| June | 81°F | 62°F | 71.5°F | 4.31 | 79°F | 64°F |
| July | 86°F | 68°F | 77.1°F | 4.81 | 85°F | 70°F |
| August | 84°F | 66°F | 75.3°F | 4.45 | 83°F | 69°F |
| September | 78°F | 60°F | 68.7°F | 4.01 | 77°F | 62°F |
| October | 66°F | 48°F | 57.1°F | 4.17 | 65°F | 51°F |
| November | 55°F | 38°F | 46.8°F | 3.28 | 54°F | 41°F |
| December | 46°F | 31°F | 38.2°F | 4.33 | 45°F | 33°F |
In metric: a yearly mean of 12.7°C, January lows of −4°C, July highs of 30°C and 1,213 mm of precipitation a year.
Source: NOAA NCEI U.S. Monthly Gridded Climate Normals 1991-2020 (nClimGrid, accession 0245564); NOAA NCEI 1991-2020 station normals. The grid cell holding the city's Census center point.
What do the station records around Perth Amboy say?
Each row is a NOAA station's own 1991-2020 normals, with the snow and frost dates the grid does not give. A record downhill or nearer the coast than the city can run warmer, one uphill cooler: compare the elevations.
| Record | Where | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Ny Ave V Brooklyn | 16 mi E | 20 ft | 55.5°F | 28°F | 85°F | 47.1 | 25 | April 1 |
| New Brunswick3 mi SE | 9 mi W | 111 ft | 53.7°F | 23°F | 87°F | 49.5 | 29 | April 15 |
| Plainfield | 9 mi NW | 90 ft | 54.9°F | 24°F | 88°F | 48.7 | 21 | April 11 |
Source: NOAA NCEI 1991-2020 U.S. Climate Normals; place center and population: Census Bureau 2024. Last frost: the median last spring date of 32°F.
How much snow, how late a frost, what zone and how much sun in Perth Amboy?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Ny Ave V Brooklyn (16 miles E, 20 ft). It gets 25 inches of snow in a normal year. The last spring frost (32°F) comes after April 1 in half of years and the first autumn frost before November 19. Its record high is 105°F (1966) and its record low −4°F (1985) (kept since 1953).
The USDA's 2023 Plant Hardiness Zone Map puts Perth Amboy in zone 7b (ZIP code 08861).
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area (4.0 kWh per square metre a day, NASA POWER 2001-2020); July is the sunniest month (82%) and December the cloudiest (66%).
Ny Ave V Brooklyn's page has its months, frost probabilities, records by month and recent years. NOAA's grid has monthly figures only, so there are no day-by-day month pages for Perth Amboy; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USC00305796; records: ACIS; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; sunshine: NASA POWER.
How does the climate vary across Perth Amboy, ZIP code by ZIP code?
One ZIP code area lies wholly or partly in Perth Amboy. Each row also names the nearest station record and its frost dates.
| ZIP code | Zone | Year | Jan low | Jul high | Precip. | Nearest record | Last frost | First frost |
|---|---|---|---|---|---|---|---|---|
| 08861 | 7b | 54.9°F | 26°F | 86°F | 47.8 | New Brunswick (9 mi) | April 15 | October 26 |
Source: Census Bureau 2020 ZCTA-to-place relationship file and ZCTA centers; NOAA NCEI gridded and station normals, 1991-2020. A ZIP area counts when at least a tenth of its land (and 0.5 km²) is in the city; its figures are the grid cell at its center; frost dates are the nearest record's medians of 32°F.