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November 2024 Summary – Sunniest on Record

December 3, 2024

Blue Hill Observatory November 2024 Summary: November temperature was much above average with less rainfall and much more sunshine than expected. The…

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Blue Hill Observatory November 2024 Summary:

November temperature was much above average with less rainfall and much more sunshine than expected. The approximated 24-hour mean temperature for the month of 45.8 deg F was 5.1 degrees warmer than the 1891-2020 130-year average for November, and it was 3.7 degrees warmer than the 1991-2020 30-year average. The month was the eleventh warmest November on record. The average maximum temperature of 54.6 deg F was 4.5 degrees warmer than the 30-year normal, which tied as the seventh warmest on record. The average minimum temperature of 37.4 deg F was 3.6 degrees warmer than the 30-year normal. The month got off to a very warm start with a record breaking high temperature of 77F on the 1st, which surpassed the previous record for the date of 75F in 2003 followed by another daily record high of 80F on the 6th, which surpassed the previous record for that date of 74F in 2022. The high of 80F on the 6th was only one degree below the November record of 81F on November 2nd, 1950, but it was the latest temperature of 80F or more ever measured at the Observatory. The mean temperature of 70F on the 6th was the highest on record for November as was the five cooling degree days for that day. The first freeze of the season occurred on the 3rd with a low temperature of 30F, which was about two weeks later than average. The highest temperature for November was 80F on the 6th, and the lowest temperature was 26F on the 30th. The mean water vapor pressure, which is an absolute measure of water vapor in the air, was 6.8 mb, which corresponds to a mean dew point of 35F and was slightly below average for the month. The first twenty days of the month were very dry with only 0.08 inches of rain, which continued the fall dry spell and extended the severe drought in the local area, but this was followed by a three-day rain storm of 2.53 inches on the 21st-23rd. The total precipitation for the month was 3.67 inches, which was 0.64 inches less than the 30-year normal. The greatest amount in 24 hours during November was 1.61 inches on the 21st-22nd. There were only six days with measurable precipitation in November, which was one of the lowest on record. There were no thunderstorm days during November. The mean wind speed was 12.9 mph, and the prevailing wind direction was from the northwest. The highest wind gust was 52 mph from the west-northwest on the 24th. In the mostly dry pattern, November sunshine was well above average with 204.7 hours of bright sunshine, or 72 percent of possible, which was the highest amount on record for November and twenty-four percent more than the long-term average for the month.

BHO Warmest November Average Maximum Temperature, deg F (1885-2024):

1) 57.0 in 2011
2) 56.3 in 2020
3) 55.8 in 1975
4) 55.0 in 2022
5) 54.9 in 1927
6) 54.8 in 2001
7) 54.6 in 1931
   54.6 in 1941
   54.6 in 2006
   54.6 in 2024

BHO Warmest November Temperature, deg F (1885-2024):

1) 81 on 2 Nov 1950
2) 80 on 6 Nov 2024
3) 78 on 2 Nov 1982
4) 77 on 4 Nov 1987
   77 on 1 Nov 2024
6) 76 on 5 Nov 1994

BHO Highest November Daily Cooling Degree Days (1885-2024):

1) 5 on 6 Nov 2024 (80/59/70)
2) 4 on 6 Nov 2022 (74/63/69)
3) 3 on 2 Nov 1950 (81/54/68)
4) 2 on 7 Nov 1938 (75/58/67)
   2 on 3 Nov 1990 (75/58/67)

BHO November Fewest Days With Measurable Precipitation (1885-2024):

1) 4 in 1917
   4 in 1976
3) 5 in 1890
   5 in 2012
5) 6 in 1904
   6 in 1939
   6 in 1960
   6 in 2024

BHO Highest November Bright Sunshine, hours (1886-2024):

1) 204.7 in 2024 [72%]   
2) 191.1 in 2021 [67%]   
3) 182.3 in 1939 [64%]   
4) 181.5 in 1917 [64%]   
5) 181.4 in 1976 [64%]   
6) 178.5 in 2022 [63%]   
7) 174.5 in 2023 [62%]   

Mike Iacono
Chief Scientist
Blue Hill Observatory

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
§ 01

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All observational records, compiled datasets, metadata, database structures, and related materials provided by the Blue Hill Observatory & Science Center are the exclusive property of the Blue Hill Observatory & Science Center. The Observatory has maintained continuous weather observations at the summit of Great Blue Hill since 1885, and the entirety of that record — its compilation, structure, curation, and organization — constitutes a proprietary database protected under applicable United States law, including copyright law and common law database protections.

All rights not expressly granted in this Policy are reserved by the Observatory. No access to or use of Observatory data shall be construed as a waiver of any rights or as a license to use data beyond the scope expressly stated herein.

§ 02

Governing Law and Jurisdiction

This Policy shall be governed by and construed in accordance with the laws of the Commonwealth of Massachusetts, without regard to its conflict of law provisions. For interactions with international users, this Policy shall apply to the maximum extent permitted by applicable local law.

Any dispute arising from or related to this Policy shall be subject to the exclusive jurisdiction of the state and federal courts located in Norfolk County, Massachusetts. By accessing Observatory data, all users consent to personal jurisdiction in Massachusetts and waive any objection to the venue or inconvenience of such forum.

§ 03

Permitted Uses

Observatory data are made available for the following limited, non-commercial purposes only:

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All other uses require prior written authorization from the Observatory.

§ 04

Attribution Requirement

Any use of Observatory data in any published, presented, or publicly distributed work must include the following verbatim acknowledgment:

“Data provided by the Blue Hill Observatory & Science Center, Milton, Massachusetts. Continuous weather observations since 1885.”

Failure to include proper attribution is a material violation of this Policy.

§ 05

Prohibited Uses

Unless explicitly authorized in writing, Users may not:

  • Resell, license, sublicense, or commercially exploit Observatory data in any form
  • Redistribute the dataset in whole or in part to any third party
  • Publish the dataset for download by third parties
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§ 06

Commercial Licensing

Organizations seeking to use Observatory data for commercial purposes must obtain a license prior to any such use. Licensing inquiries: data@bluehill.org.

§ 07

Automated Access

Automated scraping, bulk harvesting, or systematic downloading of Observatory data is strictly prohibited without prior written authorization.

§ 08

Enforcement and Remedies

Violation of this Policy may result in immediate revocation of data access, pursuit of legal remedies available under United States law, and referral to applicable authorities. The Observatory reserves all rights to seek injunctive relief, damages, and attorneys’ fees in connection with any unauthorized use of its data.

Part II — Privacy Policy
§ 09–10

Scope & Information Collected

This section governs the collection, use, storage, and disclosure of personal information from visitors to the Blue Hill Observatory website and users of its data services. The Observatory may collect contact information (name, email, organization) when voluntarily submitted, usage data including IP addresses and pages visited, and data download records.

§ 11–12

How We Use Information & Retention

Information is used solely for: responding to inquiries and licensing requests; monitoring and enforcing compliance with this Policy; improving website performance; and communicating Observatory news to opted-in users. The Observatory does not sell, rent, or share personal information with third parties for marketing purposes. Data access records may be retained indefinitely for compliance and enforcement purposes.

§ 13

International Users and Data Transfers

The Observatory is located in the United States. International users acknowledge their information will be processed in the United States under U.S. law. Users requiring specific data processing agreements under non-US law must contact data@bluehill.org before accessing data.

§ 14–16

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Part III — General Provisions
§ 17–20

Modifications, Severability, Entire Agreement & Contact

The Observatory reserves the right to modify this Policy at any time. Updated versions will be posted at bluehill.org. Continued use of Observatory data following any modification constitutes acceptance of the revised Policy. This Policy constitutes the entire agreement between the User and the Observatory. Questions and licensing inquiries: Blue Hill Observatory & Science Center, Milton, Massachusetts — data@bluehill.org

By accessing, downloading, or using any Blue Hill Observatory data or services, you acknowledge that you have read, understood, and agree to be bound by this Policy.
Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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