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 8.0 degrees Fahrenheit on 17 September 2026, compared to 7.0 on the previous day.
Sample. There are 16,696 observations overall in the daily series shown in the plot above. The span of time covered by the series stretches from January 1981 to September 2026.
History. Here's a snapshot of some simple statistics we computed on the entire sample: degree days had a mean value of 3.6 degrees Fahrenheit; they reached their maximum of 17.0 on 22 July 2011; they recorded a minimum of 0.0 on 1 January 1981.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2026-09-15 | 7.00000 |
| 2026-09-16 | 7.00000 |
| 2026-09-17 | 8.00000 |
Hint. To simplify exploration, we group time series into data sets and worksheets. By moving down the page, you will find how we structured further information linked to the statistics found here.
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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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