November 2024 Summary – Sunniest on Record
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