Heating degree days (F) - Illinois (US) - NOAA - Daily
This series is part of the dataset: Heating and cooling degree days (NOAA)
Download Full Dataset (.xlsx)Latest updates. In Illinois, heating degree days were 23.0 degrees Fahrenheit on 25 March 2025, the same as on 24 March 2025.
Sample. The daily time series plotted above has 16,155 records. The series covers the time span going from January 1981 to March 2025.
History. Take a look at some summary statistics calculated on the full sample: degree days had an average value of 16.7 degrees Fahrenheit; they recorded a bottom of 0.0 on 23 May 1981; they reached their highest level of 78.0 on 24 December 1983.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2025-03-23 | 24.0 |
| 2025-03-24 | 23.0 |
| 2025-03-25 | 23.0 |
Heads-up. An advantage of our web site is that we publish accurate metadata. Find it below to gain insights on the properties of the time series that you analyze.
Not for investment purposes. Time series and other data accessible on FetchSeries are not suitable for investment purposes or other financial decisions. Users should obtain professional advice and do independent analysis before pledging money to any investment.
Series Metadata
| Field | Value |
|---|---|
| Description | Heating degree days |
| Country | Illinois (US) |
| Economic concept | Heating needs |
| Data type | Estimate based on daily minimum and maximum temperatures |
| Deflation method | Not applicable |
| Seasonally adjusted | No |
| Rescaling | Population-weighted averages of weather-station observations |
| Frequency | Daily |
| Unit | Degrees Fahrenheit |
| Source | NOAA National Weather Service |
| Source type | Federal Administration |
| Data licence | Not copyrightable under U.S. law |
| Measure type | 65F - (max_daily_temperature + min_daily_temperature) / 2 |