Cooling degree days (F) - United States (excluding Alaska and Hawaii) - NOAA - Daily
This series is part of the dataset: Heating and cooling degree days (NOAA)
Download Full Dataset (.xlsx)Latest updates. In the United States (excluding Alaska and Hawaii), cooling degree days were 3.0 degrees Fahrenheit on 28 September 2026, compared to 4.0 on 27 September.
Sample. There are 16,707 data points in the daily time series displayed in the plot above. The span of time covered by the series stretches from January 1981 to September 2026.
History. Check out some summary statistics we calculated on the entire sample: degree days recorded a minimum of 0.0 degrees Fahrenheit on 1 January 1981; they hit a peak of 17.0 on 22 July 2011; they had a mean value of 3.6.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2026-09-26 | 4.0 |
| 2026-09-27 | 4.0 |
| 2026-09-28 | 3.0 |
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Series Metadata
| Field | Value |
|---|---|
| Description | Cooling degree days |
| Country | United States (excluding Alaska and Hawaii) |
| Economic concept | Cooling 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 | (max_daily_temperature + min_daily_temperature) / 2 - 65F |
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