Address reportCitiesMassachusetts › Lowell

Lowell, MA

Earthquake hazard, typical weather and growing season from public federal data. Population 108,861.

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 moderate

Design category C

Moderate seismic hazard. Occasional moderate earthquakes are credible over a building's life; new construction requires moderate seismic-resistant design and detailing. The ASCE 7 Seismic Design Category here is C. (Short-period design value Ss ≈ 0.356 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

84.7° in July, 15.8° in January

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

MonthHighLowRain
Jan34°15.8°3.61"
Feb37.3°16.9°3.2"
Mar45.4°24.4°4.32"
Apr59°34.6°4.06"
May70°45°3.81"
Jun79°55°4.37"
Jul84.7°60.9°3.86"
Aug83°59.3°4"
Sep75.5°51.5°3.89"
Oct62.4°39.5°5"
Nov50.5°30.3°3.85"
Dec39.8°22.1°4.54"

This station records temperature and precipitation but not snowfall, so no snow column is shown. That is missing data, not a report of zero snow — Lowell may well get plenty.

NOAA/NCEI 1991–2020 U.S. Climate Normals — station LOWELL, MA US, 3.2 mi away.

Growing season zone 6b

164 frost-free days

Last spring frost around April 30, first fall frost around October 10. 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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