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 0.0 degrees Fahrenheit on 14 August 2026, unchanged with respect to 13 August 2026.
Sample. There are 16,662 observations overall in the daily time series presented in the figure above. The series covers the span of time stretching from January 1981 to August 2026.
History. Here’s a quick look at a few summary statistics computed on the whole sample: degree days had a mean of 15.1 degrees Fahrenheit; they reached their minimum of 0.0 on 3 July 1981; they attained a maximum of 55.0 on 23 December 1983.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2026-08-12 | 2.0 |
| 2026-08-13 | 0.0 |
| 2026-08-14 | 0.0 |
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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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