At NOAA station USW00094846 (Chicago Ohare Intl Ap, IL), there were 28 complete winters of snowfall records between 1996-97 and 2025-26. Median seasonal snowfall was 34.55". Storms totaling 1"+: median 8.5 per winter (range 4–16). Storms of 2"+: median 5 (80th percentile 7.6; range 1–13).
For snow contractors: a seasonal price built on the median winter runs short in every winter above the median. Use the Seasonal Snow Contract Pricer to price on the 80th-percentile winter and backtest your number.
| Winter | Snowfall (in) | Storms ≥1" | Storms ≥2" | Storms ≥3" | Snow days ≥0.1" |
|---|---|---|---|---|---|
| 2025-26 | 34.3 | 9 | 5 | 3 | 33 |
| 2024-25 | 17.8 | 7 | 4 | 1 | 21 |
| 2023-24 | 22.2 | 5 | 1 | 1 | 17 |
| 2022-23 | 20.2 | 8 | 2 | 1 | 24 |
| 2021-22 | 33.0 | 8 | 7 | 5 | 27 |
| 2020-21 | 48.9 | 10 | 6 | 5 | 29 |
| 2019-20 | 34.8 | 12 | 8 | 6 | 29 |
| 2018-19 | 49.7 | 14 | 9 | 6 | 37 |
| 2017-18 | 36.1 | 8 | 5 | 2 | 31 |
| 2016-17 | 26.2 | 4 | 4 | 4 | 15 |
| 2015-16 | 31.2 | 11 | 3 | 2 | 24 |
| 2014-15 | 50.8 | 8 | 6 | 6 | 35 |
| 2013-14 | 82.2 | 16 | 13 | 11 | 51 |
| 2012-13 | 30.3 | 6 | 4 | 3 | 29 |
| 2011-12 | 19.8 | 6 | 3 | 3 | 18 |
| 2010-11 | 57.5 | 9 | 7 | 6 | 32 |
| 2009-10 | 54.3 | 12 | 9 | 7 | 30 |
| 2008-09 | 52.9 | 13 | 10 | 6 | 40 |
| 2007-08 | 60.4 | 15 | 11 | 9 | 44 |
| 2006-07 | 35.7 | 10 | 5 | 4 | 23 |
| 2005-06 | 26.1 | 9 | 3 | 2 | 28 |
| 2004-05 | 39.4 | 9 | 5 | 4 | 27 |
| 2003-04 | 24.9 | 8 | 5 | 2 | 25 |
| 2002-03 | 28.7 | 8 | 6 | 3 | 21 |
| 2001-02 | 31.2 | 4 | 3 | 3 | 22 |
| 2000-01 | 39.3 | 9 | 5 | 4 | 27 |
| 1999-00 | 30.4 | 7 | 4 | 3 | 20 |
| 1998-99 | 50.9 | 6 | 4 | 3 | 24 |
Storm = consecutive days with ≥0.1" new snow, summed. Winters with less than 90% of Nov–Mar days reported are omitted. Historical observations only, not a forecast. Data: NOAA NCEI GHCN-Daily (public domain). Not affiliated with NOAA.
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