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 were 18.0 degrees Fahrenheit on 13 November 2025, compared to 20.0 on 12 November 2025.
Sample. This daily series has 16,388 data points overall. The time span covered by the series stretches from January 1981 to November 2025.
History. Here are a few summary statistics calculated on the full sample: degree days had a mean value of 15.1 degrees Fahrenheit; they recorded a maximum of 55.0 on 23 December 1983; they recorded a minimum of 0.0 on 3 July 1981.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2025-11-11 | 19.0 |
| 2025-11-12 | 20.0 |
| 2025-11-13 | 18.0 |
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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 |