Thanksgiving Day Historic Weather and Climatology

*Reposted from 2013, updated through 2015.

Normals *1981-2010
High: 48
Low: 33
Mean: 40.5
Precipitation: 0.11″
Snowfall: 0.1″

Top 10 Coldest Highs
1. 1930: 12
2. 1936: 26
3. 1880, 1903, 1905: 27
4. 1938: 28
5. 1892, 1898: 29
6. 1881: 30
7. 1945, 2002, 2013: 32
8. 1886, 1889, 1890, 1929, 1958: 33
9. 1882, 1885, 1901, 2014: 34
10. 1912, 1947, 1956, 1982, 2000: 35

Top 10 Coldest Lows
1. 1930: 3
2. 1930, 2005: 15
3. 1929, 1984: 16
4. 2000: 17
5. 1880, 1881, 1892, 1894, 1958: 18
6. 1901, 1905, 2002: 19
7. 1898, 1936, 1938, 1950, 1982, 1989, 1996: 20
8. 1911, 1956, 2013: 21
9. 1882, 1886, 1912, 1945: 22
10. 1994, 2008: 23

Top 10 Warmest Highs
1. 1896: 70
2. 2015: 65
3. 1915, 1940: 64
4. 1879, 1908, 1981, 2007, 2012: 63
5. 1966, 1968, 1973, 1979: 62
6. 1918, 1941: 61
7. 1914, 1927, 1983: 60
8. 1933: 59
9. 1899, 1957: 58
10. 1921, 1943, 1990, 2010: 57

Top 10 Warmest Lows
1. 1979: 53
2. 1896: 52
3. 1940: 51
4. 1957: 49
5. 1879: 48
6. 1934, 1966, 2015: 47
7. 1968: 46
8. 1913, 1933, 1978, 1990, 2003: 43
9. 1899, 1927, 1961: 42
10. 1908, 1951, 1987, 1991, 1998: 41

Top 10 Wettest
1. 2010: 1.76″
2. 1961: 1.58″
3. 1968: 1.22″
4. 1990: 0.71″
5. 1921, 1925: 0.70″
6. 1926: 0.69″
7. 1980: 0.65″
8. 1887: 0.60″
9. 1957: 0.59″
10. 1951: 0.49″

Top 10 Snowiest
1. 1880: 3.2″
2. 1950: 1.1″
3. 1938: 0.8″
4. 1959: 0.7″
5. 1889: 0.4″
6. 1945, 1957: 0.3″
7. 1890, 1954, 2005: 0.2″
8. 1953, 2004: 0.1″
9. Multiple: Trace
10. Multiple: 0


Most Snow on the Ground

1959: 1″
2013: 1″
Trace: Multiple

Summer 2016

Now that Summer 2016 is but a memory, let’s take a quick look back at where it stands in the record books.

Temperature

Summer 2016 Means
June-August Mean High: 85.5
June-August Mean Rank since 1878: 26th Warmest
While the average high for Summer 2016 was certainly warm, it fell just outside of the top 25. By comparison to recent years, 2010 (85.6), 2011 (85.7) and 2012 (87.7) all had warmer average highs.

June-August Mean Low: 66.1
June-August Mean Low Rank since 1878: 4th Warmest
The average low for the summer is what made 2016 much more exceptional. No recent years (last decade) were warmer, although 2010 did tie.

June-August Mean: 75.8
June-August Mean Rank since 1878: 10th
So if you thought this summer was hot, well you were right. Only 2010 (75.9) and 2012 (76.4) were warmer of any recent years.

Monthly Means
June Mean: 73.2
June Mean Rank since 1878: 17th Warmest
July Mean: 76.6
July Mean Rank since 1878: 20th Warmest
August Mean: 77.6
August Mean Rank since 1878: 6th Warmest
The summer gradually became hotter as it went on.

Summer 2016 Misc. Temperature Stats
# of 90+ Days: 18
90+ Days Rank: 22nd
Warmest High: 95
Warmest Low: 77
Coldest High: 72
Coldest Low: 48

Daily Temperature Records
June 11th: Record Warm Maximum Tie: 95: Tied with 1914 and 1933.
August 10th: Record Warm Minimum Tie: 75: Tied with 2001.
August 11th: Record Warm Minimum Tie: 76: Tied with 1918.
August 12th: Record Warm Minimum: 76: Beat record from 1947.
August 13th: Record Warm Minimum Tie: 75: Tied with 1995.

Precipitation

June-July Precipitation Total: 13.53″
June-July Precipitation Rank since 1878: 29th Wettest
Besides being warm, Summer 2016 was also fairly wet.

Monthly Precipitation Stats
June Precipitation: 5.22″
June Precipitation Rank since 1878: 29th
July Precipitation: 2.49″
July Precipitation Rank since 1878: 27th Driest
August Precipitation: 5.82″
August Precipitation Rank since 1878: 13th Wettest
So the summer was bookended by wet months with July being fairly dry.

Summer 2016 Misc. Precipitation Stats
Total Precipitation Days (including Trace): 45
Total Measurable Precipitation Days: 30
Measurable Precipitation Days Rank since 1878: 16th Highest
Days with 0.25″ or Higher: 16
Days with 0.50″ or Higher: 10
Days with 1.00″ or Higher: 4

Daily Precipitation Records
June 23rd: 2.75″: Beat the old record in 1901.

Historic Record of Early Season Cold

With temperatures predicted to fall to near freezing for the first time this week for the fall season, I thought it might be interesting to take a look at the incidence of early-season cold, and the average on when it tends to arrive.

Here are the earliest dates on record for the following:

Temperatures Below 40 and Temperature Range of Observed Dates
1. 8/29/1965: 39
2. 9/8/1951: 39
3. 9/9/1883: 39
4. 9/13/1964: 38
5. 9/14/1902, 9/14/1923, 9/14/1953, 19/14/1975: 38-39
6. 9/17/1959: 37
7. 9/20/1896, 9/20/1956, 9/20/1962: 37-39
8. 9/21/1889, 9/21/1897, 9/21/1991: 37-38
9. 9/22/1918, 9/22/1974, 9/22/1976, 9/22/1995: 37-38
10. 9/23/1885, 9/23/1913, 9/23/1963, 9/23/1967, 9/23/1981, 9/23/1989: 35-39

Average Date of First Under-40 Temp By Decade (1878-2014)
2010s: October 11th
2000s: October 8th
1990s: October 2nd
1980s: September 30th
1970s: October 1st
1960s: September 25th
1950s: September 25th
1940s: September 30th
1930s: October 11th
1920s: October 2nd
1910s: October 9th
1900s: October 5th
1890s: October 1st
1880s: October 2nd
1870s: October 1st

Highs Below 32
1. 10/30/1917: 32
2. 11/3/1951, 11/3/1966: 28-29
3. 11/4/1991: 27
4. 11/6/1967: 31
5. 11/7/1971: 31
6. 11/8/1976: 32
7. 11/10/1913: 27
8. 11/12/1920, 11/12/1921, 11/12/1932: 30-32
9. 11/13/1911, 11/13/1919, 11/13/1986, 11/13/1996: 25-32
10. 11/15/1880, 11/15/1893, 11/15/1916, 11/15/1933, 11/15/1940, 11/15/1969: 24-32

Average Date of First 32 or Below High By Decade
2010s: December 4th
2000s: December 2nd
1990s: December 7th
1980s: November 28th
1970s: November 29th
1960s: November 23rd
1950s: November 26th
1940s: December 2nd
1930s: November 27th
1920s: November 28th
1910s: November 22nd
1900s: November 30th
1890s: November 25th
1880s: November 30th
1870s: December 4th

Lows Below 32
1. 9/21/1962: 31
2. 9/29/1961: 32
3. 9/30/1888, 9/30/163: 31-32
4. 10/1/1899: 30
5. 10/2/1886, 10/2/1908, 10/2/1974: 31-32
6. 10/3/1975, 10/3/1981, 10/3/2003: 32
7. 10/4/1952, 10/4/1987: 29-32
8. 10/5/1965, 10/5/1968: 31-32
9. 10/6/1892, 10/6/1964, 10/6/1980, 10/6/1988: 30-31
10. 10/7/1889, 10/7/1935: 30-31

Average Date of First 32 or Below Low By Decade
2010s: October 24th
2000s: October 26th
1990s: October 22nd
1980s: October 17th
1970s: October 17th
1960s: October 8th
1950s: October 22nd
1940s: November 3rd
1930s: October 24th
1920s: October 28th
1910s: October 31st
1900s: October 24th
1890s: October 20th
1880s: October 20th
1870s: October 26th

Summer of Rain 2015

This summer has been wet… very wet. Rain has fallen on far more days than not, and cloud cover has hung thick and heavy in what are historically much sunnier months. To top it all off, temperatures have been somewhat below normal.

How wet has summer 2015 been up through today? Meteorological summer runs June 1st-August 31st, and today makes the midpoint of that period, so I thought it would be a good time to check in and answer that question.

Here are the top 10 wettest summers through yesterday.

1. 1958: 12.54″
2. 2008: 11.68″
3. 1990: 10.93″
4. 2015: 10.66″
5. 1949: 10.40″
6. 1973: 10.23″
7. 1917: 10.06″
8. 1928: 10.02″
9. 1937: 9.75″
10. 1969: 9.38″

So 2015 is running the 4th wettest. It looks to be dry the next few days before more thunderstorms and rain return, so 2015’s position may end up rising.

What are the wettest full summers of all time? A few of the above years went on to be in the top 10, but not all.

1. 1958: 22.02″
2. 1979: 20.92″
3. 1995: 19.85″
4. 2003: 19.39″
5. 1969: 19.09″
6. 1915: 18.92″
7. 1992: 18.44″
8. 1973: 17.81″
9. 1989: 17.45″
10. 1949: 16.54″

Summer 2015 needs about 6″ more to reach into the top 10 wettest summers, which at the current pace is more than possible.

Winter 2014-2015: A Look Back- November 2014

While it’s still possible to get snow into April, winter is essentially over for one more year. For the second year in a row, winter was colder and snowier than normal, so let’s look at the monthly play-by-play as well as the final stats.

November 2014
First, a reminder of November normals.
High: 52.6
Low: 36.1
Mean: 44.4
Precipitation: 3.20″
Snowfall: 0.9″
Snow Depth: 0.0″

November 2014 Average High: 45.7
1878-2014 Ranking: 10th Coldest
Departure from Normal: -6.9

November 2014 Average Low: 30.0
1878-2014 Ranking: 6th Coldest
Departure from Normal: -6.1

November 2014 Mean Temperature: 37.8
1878-2014 Ranking: 7th Coldest
Departure from Normal: -6.6

Coldest November 2014 High: 19 on the 18th
1878-2014 Ranking: 5th Coldest
The 19 recorded on the 18th was the record coldest high ever recorded for the date, beating the previous 1903 record by a full 7 degrees!
Other near record low highs:
33 on the 17th. 3rd coldest daily high for the date.
27 on the 21st. 3rd coldest daily high for the date.

Coldest November 2014 Low: 12 on the 18th.
1878-2014 Ranking: 8th Coldest
The 12 recorded on the 18th was the 2nd coldest low ever recorded for the date.
Other near record lows:
13 on the 19th. 2nd coldest low for the date.
14 on the 21st. 2nd coldest low for the date.

Number of Highs 32 Degrees or Below: 4
1878-2014 Rank: 5th Highest

Number of Lows 32 Degrees or Below: 19
1878-2014 Rank: 4th Highest

November 2014 was clearly very cold historically, coming in as a top 10 coldest ever.

The month overall was rather dry, with just 1.46″ of precipitation, which was 1.74″ below normal. This was the 22nd driest November since 1878.

November 2014 Precipitation Days: 20
1″+ Daily Precipitation Days: 0
0.5″+ Daily Precipitation Days: 0
0.25″+ Daily Precipitation Days: 3

Snowfall, despite the dry month, came in at a bit above normal, at 4.1″. Still, this was the 15th snowiest November on record, as the graph shows.

Greatest November 2014 Daily Snowfall: 3.8″ on the 17th.
1878-2014 Rank: 10th Greatest
The 3.8″ on the 17th was also the 2nd highest total for the date.

Snowfall Days: 9
1″+ Snowfall Days: 1
2.5″+ Snowfall Days: 1
5″+ Snowfall Days: 0

Greatest Daily Snow Depth: 3″ on the 18th and 19th.
Average Monthly Snow Depth: 0.4″