Address reportCitiesNew Jersey › Perth Amboy

Perth Amboy, NJ

Earthquake hazard, typical weather and growing season from public federal data. Population 51,982.

Flood zone: it depends on the exact parcel

There is no such thing as a flood zone for a whole city. Two houses on the same street can sit in different zones, and it is the single fact here that changes most over a short distance. So this page does not guess one.

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Earthquake hazard low

Design category B

Low seismic hazard. Earthquakes are infrequent and usually minor here, but the building code still applies light seismic detailing to new construction. The ASCE 7 Seismic Design Category here is B. (Short-period design value Ss ≈ 0.269 g — the standard headline measure of ground-shaking hazard.)

USGS Seismic Design Web Services (ASCE 7), assuming Site Class D — stiff or unknown soil. Real soil conditions can move the category either way.

Typical weather

86.5° in July, 22.9° in January

Thirty-year averages, not a forecast. Any individual year can differ substantially.

MonthHighLowRainSnow
Jan40.3°22.9°3.74"8.3"
Feb42.8°24°2.97"9.3"
Mar50.6°31°4.4"5.2"
Apr62.5°40.8°3.89"0.6"
May72.1°50.6°4.03"0"
Jun81.2°60.4°4.83"0"
Jul86.5°65.6°4.83"0"
Aug84.7°64°4.66"0"
Sep78.4°56.5°4.18"0"
Oct66.5°44.2°4.11"0.2"
Nov55.5°35.2°3.4"0.5"
Dec45.4°28.4°4.49"4.9"

NOAA/NCEI 1991–2020 U.S. Climate Normals — station NEW BRUNSWICK 3 SE, NJ US, 8.5 mi away.

Growing season zone 7b

193 frost-free days

Last spring frost around April 15, first fall frost around October 26. Roughly half of years see frost outside that window.

2023 USDA Plant Hardiness Zone Map and NOAA/NCEI 1991–2020 frost normals.

What this page does not tell you

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