Chicago Weather Records Tracking

[Chicago Storm]

19 hours ago, mimillman said:

Out of curiosity, what was the latest subfreezing low temperature for Chicago?

9/24/1931.

Currently we are ranked 27th latest.

[IWXwx]

1 hour ago, Chicago Storm said:

9/24/1931.

Currently we are ranked 27th latest.

?

[Lightning]

2 hours ago, IWXwx said:

?

I think he meant 11/24/31

[A-L-E-K]

december or bust

[A-L-E-K]

euro gets us well into mid month without a freeze in sight

[Chicago Storm]

22 hours ago, IWXwx said:

?

 

19 hours ago, Lightning said:

I think he meant 11/24/31

i have no clue why i had september in there. oops.

[Chicago Storm]

Chicago/O'Hare had a low temperature of 63° on November 4th, which broke the record high minimum temperature for the date of 61° (2022).

The low temperature of 63° on November 4th also tied the all-time November record high minimum temperature of 63°, set 11/9/2020, 11/7/1975, and 11/6/1924.

[mimillman]

On 11/7/2024 at 6:47 PM, Lightning said:

I think he meant 11/24/31

Big one in sight then

[DocATL]

9/24/1931.
Currently we are ranked 27th latest.

11/24/31 - I know that’s what you meant.

[DocATL]

Sorry to be redundant…couldn’t delete for some reason

[A-L-E-K]

nothing imminent, gfs with some deep fantasy threats 

gonna be in play right to the end

[Chicago Storm]

November 2024 finished as the 9th warmest November on record for Chicago.

Record Warmest November's
1. 50.0° - 1931
2. 48.5° - 1909
3. 48.2° - 2001
4. 47.4° - 2020
5. 47.1° - 1975
5. 47.1° - 1913
7. 47.0° - 1902
8. 46.8° - 2016
9. 46.2° - 2024
10. 45.8° - 1934

[Chicago Storm]

Fall 2024 finished as the 3rd warmest Fall on record for Chicago.

Record Warmest Fall's
1. 60.0° - 1931
2. 59.2° - 1963
3. 58.8° - 2024
4. 58.2° - 1971
5. 57.7° - 2016
6. 57.2° - 1953
6. 57.2° - 1922
6. 57.2° - 1920
9. 56.8° - 2021
9. 56.8° - 1927
9. 56.8° - 1914

[Maxim]

Have to imagine this will go down as the warmest year on record for Chicago, no?

[TheClimateChanger]

54 minutes ago, Maxim said:

Have to imagine this will go down as the warmest year on record for Chicago, no?

Would certainly look that way. This is computed by averaging of monthly average, so it's using the December mean to date. With the looming warmup, it might even end up somewhat above this. Rest assured, Chi-town is not alone. Pretty much everywhere is on track for a record-breaker, or certainly top 2 or 3.

[Chicago Storm]

2024 finished as the warmest year on record for Chicago.

Record Warmest Year's
1. 55.0° - 2024
2. 54.5° - 2012
2. 54.5° - 1921
4. 54.1° - 2023
5. 54.0° - 1931
6. 53.5° - 2021
7. 53.5° - 1998
8. 53.3° - 2020
9. 53.2° - 1953
10. 52.9° - 1954

[mimillman]

Random questions since I don’t know where the data is myself to calculate this:

1) What is Chicago’s average high and average low temperature by month on the 10y average compared to the 30y average?

2) What is Chicago’s by month snowfall average on the 10y vs the 30y?

[Danny8]

14 hours ago, mimillman said:

Random questions since I don’t know where the data is myself to calculate this:

1) What is Chicago’s average high and average low temperature by month on the 10y average compared to the 30y average?

2) What is Chicago’s by month snowfall average on the 10y vs the 30y?

Go to the NWS Chicago site (https://www.weather.gov/lot/). Click on "Climate and Past Weather", and you can search those things in the NowData tab. Select the "Monthly summarized data" product.

Monthly Mean Max Temperature for CHICAGO OHARE INTL AP, IL
Click column heading to sort ascending, click again to sort descending.

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Mean	31.6	35.9	47.2	59.0	70.3	80.4	84.3	82.6	76.0	63.0	48.7	36.8	59.6
1995	30.3	33.9	49.2	54.6	68.7	83.7	88.0	87.7	73.5	63.0	40.9	33.6	58.9
1996	31.3	33.9	40.2	55.4	64.4	78.0	80.1	82.1	73.3	62.2	39.8	33.5	56.2
1997	27.8	35.1	46.2	55.5	63.9	79.3	83.1	78.2	74.2	63.8	42.5	36.1	57.1
1998	35.3	45.0	45.6	58.7	75.4	79.5	84.1	82.5	78.3	64.3	52.4	42.7	62.0
1999	29.9	42.1	44.4	58.4	72.4	80.4	88.3	79.3	75.7	63.7	55.6	37.7	60.7
2000	32.1	42.2	54.6	57.6	72.1	76.8	79.8	81.8	74.6	66.1	43.8	24.4	58.8
2001	30.8	34.0	42.7	64.2	70.2	77.5	85.0	81.7	71.0	60.3	57.4	40.2	59.6
2002	38.5	40.2	43.6	58.9	65.2	81.1	86.6	82.8	78.9	57.5	44.8	36.9	59.6
2003	28.3	32.3	46.5	58.7	66.0	76.7	82.9	82.8	73.7	62.4	49.5	38.6	58.2
2004	27.4	35.8	49.3	61.4	70.9	77.3	80.5	77.0	78.4	63.0	50.3	35.8	58.9
2005	31.2	38.9	43.9	63.4	67.8	85.2	86.4	84.0	80.1	64.3	51.4	29.4	60.5
2006	42.0	36.3	46.7	64.1	69.7	78.8	85.7	83.0	71.1	57.5	50.2	40.5	60.5
2007	33.8	24.4	51.3	56.5	75.5	81.6	83.5	83.2	79.2	68.1	47.0	34.1	59.9
2008	32.0	29.7	42.5	59.8	66.2	80.9	83.8	81.8	75.2	61.6	46.3	31.5	57.6
2009	23.9	36.9	48.7	57.0	70.6	77.0	78.4	79.1	74.3	55.2	53.1	32.3	57.2
2010	27.4	32.3	50.4	65.5	71.2	80.2	87.1	85.7	74.2	66.8	50.8	29.0	60.0
2011	26.7	32.7	43.8	56.1	67.8	79.4	88.5	82.5	69.9	65.2	52.4	41.8	58.9
2012	38.5	40.2	63.3	59.8	76.5	85.5	91.5	84.0	74.5	60.5	49.0	42.5	63.8
2013	35.3	33.1	39.6	56.3	71.2	78.2	81.8	82.7	77.1	62.4	45.3	31.1	57.8
2014	24.6	25.7	40.9	59.2	71.0	81.0	79.8	82.1	73.7	60.6	41.4	36.9	56.4
2015	29.0	23.4	44.4	60.0	70.0	76.9	81.9	80.9	78.1	63.2	53.7	44.5	58.8
2016	31.7	37.2	51.5	57.4	70.1	81.9	84.4	84.3	77.7	65.8	55.3	31.1	60.7
2017	34.6	47.7	47.1	63.8	67.7	83.3	83.8	80.7	79.7	65.5	46.9	34.2	61.3
2018	31.9	38.0	44.7	50.0	76.4	80.4	85.1	84.8	77.5	60.7	39.7	39.7	59.1
2019	27.5	34.0	42.7	59.1	67.5	77.3	86.1	81.5	76.9	58.7	41.6	41.3	57.9
2020	35.8	37.3	50.9	58.0	69.1	84.0	88.3	86.4	74.6	60.9	55.7	39.3	61.7
2021	33.9	27.4	53.3	61.3	69.7	83.8	82.3	86.2	79.8	66.6	48.2	45.8	61.5
2022	28.6	35.3	49.1	55.1	72.2	82.6	83.5	83.0	76.0	63.9	51.7	35.7	59.7
2023	37.5	42.2	46.0	62.2	73.8	81.4	84.6	83.0	77.7	64.7	51.0	44.2	62.4
2024	30.7	49.2	52.9	61.6	75.2	83.6	83.8	83.8	80.3	70.1	52.3	38.4	63.5

 

Monthly Mean Min Temperature for CHICAGO OHARE INTL AP, IL
Click column heading to sort ascending, click again to sort descending.

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Mean	18.0	20.5	30.1	39.3	49.9	60.1	65.4	64.5	56.6	44.9	33.2	23.4	42.2
1995	17.7	19.0	31.2	37.4	48.8	60.9	67.2	70.3	51.5	44.4	24.6	19.0	41.0
1996	15.4	18.2	21.3	34.9	45.6	57.9	59.6	62.4	53.6	41.6	26.9	21.9	38.3
1997	10.8	22.8	29.5	34.9	43.6	57.3	63.3	60.8	54.1	42.5	30.2	26.8	39.7
1998	23.8	32.4	32.3	40.8	54.1	59.0	64.8	64.4	57.1	46.6	37.2	26.6	44.9
1999	15.3	25.9	26.8	40.8	50.9	60.3	68.4	61.3	51.1	42.0	34.5	22.0	41.6
2000	18.5	25.9	33.7	36.8	51.9	57.7	62.3	63.0	54.8	46.0	30.2	7.6	40.7
2001	18.3	18.2	25.6	40.7	49.8	57.3	64.1	64.7	52.8	43.9	39.0	26.5	41.7
2002	25.3	24.1	25.5	40.9	45.2	60.8	67.5	63.5	55.8	42.0	30.4	23.4	42.0
2003	14.3	14.9	26.9	37.9	46.5	54.2	61.8	64.4	53.0	41.2	34.2	24.6	39.5
2004	13.2	18.9	33.0	39.3	49.1	56.9	61.9	58.0	54.6	44.8	37.1	21.9	40.7
2005	17.8	26.0	26.2	39.7	46.4	63.1	64.7	64.5	58.7	46.0	32.6	17.3	41.9
2006	29.6	20.0	29.9	42.1	49.5	57.8	67.3	65.6	53.7	40.4	35.5	27.1	43.2
2007	21.9	11.5	33.6	37.0	52.0	61.1	63.9	66.4	57.0	49.9	31.7	21.6	42.3
2008	14.9	16.4	27.2	39.1	44.8	60.7	64.2	63.6	57.1	43.7	32.2	14.2	39.8
2009	7.8	19.6	30.5	37.5	49.1	58.1	60.4	61.8	56.4	42.5	37.6	20.6	40.2
2010	16.5	21.1	33.0	43.6	52.2	62.2	68.2	67.7	56.1	45.2	32.2	16.0	42.8
2011	14.5	19.6	28.8	39.3	48.0	59.5	69.5	64.4	54.4	44.6	37.4	28.6	42.4
2012	21.9	25.6	43.6	41.6	54.6	62.4	70.6	62.6	53.7	42.4	32.0	29.7	45.1
2013	17.9	19.1	25.6	37.5	50.7	58.9	64.5	63.3	57.3	43.8	29.6	15.6	40.3
2014	6.7	8.9	22.4	37.9	49.7	60.9	60.9	65.3	54.2	43.4	25.8	27.1	38.6
2015	15.5	5.7	26.3	38.8	50.7	57.8	62.7	62.6	59.8	46.2	35.5	33.5	41.3
2016	17.6	23.5	35.1	38.1	49.4	61.2	66.5	67.4	61.4	47.9	38.3	18.9	43.8
2017	23.0	28.4	31.8	43.7	48.0	61.6	65.5	62.2	59.1	49.7	32.5	20.1	43.8
2018	17.4	19.6	29.1	32.4	55.9	62.6	67.4	67.7	60.4	44.7	29.4	26.7	42.8
2019	14.5	17.8	25.9	40.3	48.5	58.2	68.2	64.3	61.9	43.1	27.9	26.6	41.4
2020	24.4	23.1	34.7	38.7	50.7	63.9	70.2	67.2	57.9	42.1	39.0	26.4	44.9
2021	24.4	13.0	35.2	42.5	50.8	64.8	66.5	68.1	60.7	52.7	32.5	30.2	45.1
2022	12.6	19.5	32.4	38.9	55.2	61.9	67.0	65.7	58.8	44.2	35.1	22.5	42.8
2023	27.1	25.5	31.6	41.3	51.0	60.2	66.7	65.5	61.2	49.4	34.7	33.8	45.7
2024	21.8	29.7	35.1	43.8	54.5	64.3	66.2	65.9	60.9	49.3	40.0	25.7	46.4

 

Monthly Total Snowfall for CHICAGO OHARE INTL AP, IL
Click column heading to sort ascending, click again to sort descending.

Year	Jul	Aug	Sep	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Season
Mean	T	T	T	0.2	1.9	7.4	12.5	10.0	4.6	1.2	T	T	38.5
1994-1995	0.0	0.0	0.0	0.0	T	7.0	13.1	0.4	3.5	0.1	0.0	0.0	24.1
1995-1996	T	0.0	0.0	T	3.9	9.9	5.9	M	M	M	T	0.0	M
1996-1997	M	0.0	0.0	0.0	M	T	M	M	M	1.7	0.0	T	M
1997-1998	0.0	0.0	0.0	0.0	M	7.1	M	0.0	M	M	0.0	T	M
1998-1999	0.0	0.0	0.0	0.0	0.2	1.0	29.6	1.9	18.2	0.0	0.0	0.0	50.9
1999-2000	0.0	0.0	0.0	0.0	0.0	3.5	13.6	11.6	T	1.6	0.0	T	30.3
2000-2001	0.0	0.0	0.0	T	0.1	30.9	1.5	2.2	4.2	0.3	T	T	39.2
2001-2002	T	0.0	0.0	T	0.0	1.6	15.5	1.8	11.2	1.0	0.0	T	31.1
2002-2003	0.0	0.0	0.0	0.0	4.7	8.0	4.3	1.5	7.1	3.0	0.0	0.0	28.6
2003-2004	T	T	0.0	0.0	T	1.5	14.6	6.5	2.2	0.0	0.0	0.0	24.8
2004-2005	0.0	0.0	0.0	0.0	5.1	0.6	27.8	2.7	3.2	T	T	0.0	39.4
2005-2006	0.0	0.0	0.0	T	1.9	10.4	5.5	2.5	5.7	T	0.0	T	26.0
2006-2007	0.0	0.0	T	0.3	0.4	5.8	3.5	20.3	2.3	3.0	0.0	0.0	35.6
2007-2008	0.0	0.0	0.0	0.0	0.3	17.6	12.7	21.8	7.9	T	0.0	0.0	60.3
2008-2009	0.0	T	0.0	T	0.6	21.9	21.5	4.5	2.1	2.1	0.0	0.0	52.7
2009-2010	0.0	0.0	0.0	T	T	20.8	9.1	22.5	1.8	T	0.0	0.0	54.2
2010-2011	0.0	0.0	0.0	0.0	T	16.2	10.6	29.0	1.0	0.6	T	T	57.4
2011-2012	0.0	0.0	0.0	0.0	T	1.7	12.2	5.6	0.3	0.0	T	0.0	19.8
2012-2013	0.0	0.0	0.0	0.0	T	0.9	2.6	16.1	10.4	0.1	0.0	T	30.1
2013-2014	0.0	0.0	0.0	T	0.9	14.2	33.7	19.5	12.3	1.4	0.0	0.0	82.0
2014-2015	0.0	0.0	0.0	0.1	2.8	T	13.9	26.8	7.1	T	0.0	T	50.7
2015-2016	0.0	T	0.0	0.0	11.2	4.5	6.3	5.5	2.6	1.1	0.0	0.0	31.2
2016-2017	0.0	0.0	0.0	0.0	T	17.7	0.6	T	7.8	0.0	0.0	T	26.1
2017-2018	T	0.0	0.0	T	0.1	5.3	4.6	20.3	2.6	3.2	0.0	0.0	36.1
2018-2019	0.0	0.0	0.0	T	12.7	1.4	18.2	9.0	0.3	7.9	T	0.0	49.5
2019-2020	0.0	0.0	0.0	4.6	3.7	2.0	7.8	8.8	3.2	4.7	0.0	0.0	34.8
2020-2021	T	0.0	0.0	T	0.7	2.8	21.9	21.6	1.8	T	0.0	0.0	48.8
2021-2022	0.0	0.0	0.0	0.0	T	1.9	13.9	12.8	3.8	0.4	0.0	T	32.8
2022-2023	T	0.0	0.0	T	1.1	3.2	9.9	3.7	1.8	0.5	0.0	0.0	20.2
2023-2024	0.0	0.0	0.0	0.9	1.8	1.2	16.1	1.2	1.0	T	0.0	T	22.2

[DocATL]

https://x.com/nilwxreports/status/1887692504331432224?s=46

Is this true?? If so that’s nuts!

[Chicago Storm]

3 hours ago, DocATL said:

https://x.com/nilwxreports/status/1887692504331432224?s=46

Is this true?? If so that’s nuts!

It's actually wayyy off.

The correct answer is, this is the least total snowfall through Feb 6th in a season since 9.2" through Feb 6th during the 2012/13 season. 

[A-L-E-K]

lol not surprising

[TheClimateChanger]

4 hours ago, Chicago Storm said:

It's actually wayyy off.

The correct answer is, this is the least total snowfall through Feb 6th in a season since 9.2" through Feb 6th during the 2012/13 season. 

Don’t be dense. They were obviously carrying it through today with no snow expected. The claim is true through today’s date. It should have stated that was projected through the 7th, although that context was probably provided on air or on the web where this X account pulled the graphic.

[DocATL]

Don’t be dense. They were obviously carrying it through today with no snow expected. The claim is true through today’s date. It should have stated that was projected through the 7th, although that context was probably provided on air or on the web where this X account pulled the graphic.

Yes, it was pulled from WGN but I wasn’t sure about its veracity.

[TheClimateChanger]

2 hours ago, DocATL said:

Yes, it was pulled from WGN but I wasn’t sure about its veracity.

These are the least snowy years officially through February 7... projecting, of course, no measurable snowfall today. And eliminating a couple of incomplete winters, including 1997-1998, which, for some reason, does not include snowfall that fell after December 31 in Chicago. The NWS Chicago office has the correct seasonal total for that winter. Probably a moot point, because it looks likely that this season will again surpass the running tally from 2012-2013 within the next several days.  That winter actually didn't finish too poorly, with seasonal snowfall finishing at 30.1 inches. But certainly, it got off to a very rough start, especially coming off of one of the least snowy winters on record the prior year.

The 10 lowest final seasonal totals are given below. Of these 10, all but 3 were observed when the official weather station was downtown. In 1936-37, the official observations come from the University of Chicago; in 1948-1949, from Midway Airport; and in 2011-12, from O'Hare Airport.

Source: Chicago, IL Seasonal Snowfall Totals from 1884 to present!

[TheClimateChanger]

12 minutes ago, TheClimateChanger said:

These are the least snowy years officially through February 7... projecting, of course, no measurable snowfall today. And eliminating a couple of incomplete winters, including 1997-1998, which, for some reason, does not include snowfall that fell after December 31 in Chicago. The NWS Chicago office has the correct seasonal total for that winter. Probably a moot point, because it looks likely that this season will again surpass the running tally from 2012-2013 within the next several days.  That winter actually didn't finish too poorly, with seasonal snowfall finishing at 30.1 inches. But certainly, it got off to a very rough start, especially coming off of one of the least snowy winters on record the prior year.

The 10 lowest final seasonal totals are given below. Of these 10, all but 3 were observed when the official weather station was downtown. In 1936-37, the official observations come from the University of Chicago; in 1948-1949, from Midway Airport; and in 2011-12, from O'Hare Airport.

Source: Chicago, IL Seasonal Snowfall Totals from 1884 to present!

Interestingly - maybe not to others, but I like data - of the 13 years with the least snow through February 7, only 4 ended up among the top 10 least snowy (1920-1921, 1921-1921, 1936-1937, and 1912-1913). The top 3 least snowy overall, which is probably not super surprising, as these are years with little snowfall through early February that also had little snowfall thereafter, and then just one other (1912-1913, tied for 8th place). All of them, however, finished with less than the current seasonal normal of 38.2 inches. As noted, 2012-2013 had a decent turnaround, but the strongest turnaround was the winter of 1963-1964, which, despite just 10.4 inches through today's date, finished with 35.2 inches on the season.

I suppose it's not too surprising that all of these winters finished below the seasonal normal. It would take one of the snowiest late season periods on record for 2024-2025 to reach the seasonal normal (and that, of course, would be true for all of those years). This year, for instance, 28.3" would have to fall from tomorrow through the end of the season to reach the normal seasonal snow - that figure has only been reached 4 times and not since 1970.

[Chicago Storm]

Don’t be dense. They were obviously carrying it through today with no snow expected. The claim is true through today’s date. It should have stated that was projected through the 7th, although that context was probably provided on air or on the web where this X account pulled the graphic.

it didn’t cross my mind to look through the 7th (or beyond) for a stat on a graphic that was shown on the 6th. so yes, they were incorrect.

the only thing dense around here has been your posting.