Special Weather Report · September 27, 2026
A record-breaking day of rain on Great Blue Hill
The nor’easter dropped 5.15 inches of rain at the summit on Sunday, more than doubling a daily record that had stood since 1962.
Daily rainfall for September 27
Above record
+2.89 in.
Record stood
64 years
Summit
635 feet
What happened
Rainfall at the summit of Great Blue Hill totaled 5.15 inches for the calendar day on Sunday, September 27, as the nor’easter moved through eastern Massachusetts. That more than doubled the previous record daily rainfall for the date, 2.26 inches, set in 1962.
Why this record matters
A daily record only means something when there is a long, consistent history to measure it against. Every day since 1885, Blue Hill Observatory observers have recorded conditions at the summit, building the longest continuous weather record in the Western Hemisphere. Sunday’s rainfall now joins 141+ years of data that scientists, forecasters, and our community rely on.
The second record of the storm
Sunday’s rain came one day after the same storm set another daily record. On Saturday, September 26, the summit recorded a 58 mph wind gust, breaking a record that had stood since 1977. Read about the record wind gust →
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weather@bluehill.org →Report prepared by the observers of Blue Hill Observatory
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