150+ years of Boston weather,
all in one place.
The Boston Weather Data Archive is a historical record of daily surface observations collected at Logan International Airport and its predecessor stations dating back to January 1, 1872. It covers temperature highs and lows, precipitation, snowfall, snow depth and wind — including daily streaks of these various weather events for over a century and a half.
What you can do
Query
AI-powered — just ask in plain English: "last time we hit 95°F" or "longest dry weekends in a row." Or use the query builder directly for extremes, streaks, first occurrences, and seasonal totals.
Open Query →Charts
Visualize trends over any year range. Compare annual totals, see monthly averages, or drill down to daily values for a specific month. Download as PNG or CSV.
Open Charts →Calendar
Browse any month day-by-day. Each cell shows the temperature departure, precipitation, snowfall, and high/low — color-coded against the climate normal.
Open Calendar →Hurricanes
Every hurricane to make landfall in New England since 1851 — from the Great September Gale to Bob — with the odds of the next one and the long gaps between them. Then simulate possible futures, up to 500 years ahead, based on the historical record.
Open Hurricanes →Data Source
All observations are sourced from the NOAA Regional Climate Centers via the Applied Climate Information System (ACIS) API. The primary station is GHCND:USW00014739 — Boston Logan International Airport — one of the longest continuous surface records in New England.
Temperature departure values are calculated against the 1991–2020 climate normals, the current 30-year baseline established by NOAA. The dataset is updated automatically each day.
What's in the data
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Temperature max / min / avg — Daily high, low, and mean in °F
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Departure from normal — Difference vs 1991–2020 climate normals
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Precipitation — Total liquid equivalent in inches
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Snowfall — New snow accumulation in inches
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Snow depth — Depth of snow on the ground in inches
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Wind — Average daily wind (1984–) and peak gust (1950–) in mph
"If you don't like the weather in New England, just wait a few minutes."
Data source
Daily observations are sourced from NOAA's Global Historical Climatology Network Daily (GHCND) dataset, accessed via the Applied Climate Information System (ACIS) API. Station data is also available directly through weather.gov.
Disclaimer
This site is an independent project and is not affiliated with or endorsed by NOAA, the National Weather Service, or any government agency. All data is provided for informational and historical reference only.