Heating degree days (F) - Washington (US) - NOAA - Daily
This series is part of the dataset: Heating and cooling degree days (NOAA)
Download Full Dataset (.xlsx)Latest updates. In Washington, heating degree days stood at 4.0 degrees Fahrenheit on 17 September 2026, compared to 5.0 on 16 September.
Sample. In the daily series plotted above, there are 16,696 observations overall. The period covered by the series goes from January 1981 to September 2026.
History. Check out some simple statistics we computed on the full sample: degree days reached a minimum of 0.0 degrees Fahrenheit on 3 July 1981; they recorded their maximum of 55.0 on 23 December 1983; they were equal on average to 15.1.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2026-09-15 | 9.00000 |
| 2026-09-16 | 5.00000 |
| 2026-09-17 | 4.00000 |
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Series Metadata
| Field | Value |
|---|---|
| Description | Heating degree days |
| Country | Washington (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 |
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Discover the other time series included in this data set.