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 26.0 degrees Fahrenheit on 30 March 2026, compared to 25.0 on 29 March 2026.
Sample. There are 16,525 records in the daily time series presented in the plot above. The series covers the time range stretching from January 1981 to March 2026.
History. Here are a few statistics calculated on the full sample: degree days hit a maximum of 55.0 degrees Fahrenheit on 23 December 1983; they reached a minimum of 0.0 on 3 July 1981; they had a mean of 15.2.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2026-03-28 | 22.0 |
| 2026-03-29 | 25.0 |
| 2026-03-30 | 26.0 |
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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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