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 13.0 degrees Fahrenheit on 14 May 2026, compared to 14.0 on the previous day.
Sample. There are 16,570 data points overall in the daily series shown in the figure above. The series covers the time range going from January 1981 to May 2026.
History. Take a look at a few simple statistics calculated on the full sample: degree days averaged 15.2 degrees Fahrenheit; they reached a minimum of 0.0 on 3 July 1981; they reached their maximum of 55.0 on 23 December 1983.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2026-05-12 | 3.0 |
| 2026-05-13 | 14.0 |
| 2026-05-14 | 13.0 |
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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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