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 stood at 5.0 degrees Fahrenheit on 13 November 2025, compared to 4.0 on 12 November.
Sample. The daily time series plotted above has 16,388 records. The time period covered by the series extends from January 1981 to November 2025.
History. Here's a peek at a few statistics we calculated on the whole sample: degree days reached a maximum of 36.0 degrees Fahrenheit on 22 December 1990; they reached a trough of 0.0 on 29 April 1981; they had a mean value of 6.9.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2025-11-11 | 2.0 |
| 2025-11-12 | 4.0 |
| 2025-11-13 | 5.0 |
Tip. Our metadata often contain references to the original sources of the data series we publish. You can use these references to find additional information.
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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 |