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 1.0 degrees Fahrenheit on 28 September 2026, the same value recorded on 27 September.
Sample. There are 16,707 records overall in the daily time series shown in the plot above. The series covers the span of time extending from January 1981 to September 2026.
History. Here's a snapshot of a few summary statistics we calculated on the full sample: degree days reached their lowest level of 0.0 degrees Fahrenheit on 29 April 1981; they reached their maximum of 36.0 on 22 December 1990; they had a mean of 6.9.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2026-09-26 | 1.0 |
| 2026-09-27 | 1.0 |
| 2026-09-28 | 1.0 |
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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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Discover the other time series included in this data set.