Heating degree days (F) - California (US) - NOAA - Daily
This series is part of the dataset: Heating and cooling degree days (NOAA)
Download Full Dataset (.xlsx)Latest updates. In California, heating degree days were 0.0 degrees Fahrenheit on 23 September 2025, as on the previous day.
Sample. The daily series displayed in the graph has 16,337 observations in total. The span of time covered by the series goes from January 1981 to September 2025.
History. Take a look at a few simple statistics we calculated on the full sample: degree days recorded their maximum of 36.0 degrees Fahrenheit on 22 December 1990; they reached their lowest level of 0.0 on 29 April 1981; they were equal on average to 6.9.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2025-09-21 | 0.0 |
| 2025-09-22 | 0.0 |
| 2025-09-23 | 0.0 |
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Series Metadata
| Field | Value |
|---|---|
| Description | Heating degree days |
| Country | California (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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