Cooling 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, cooling degree days were 9.0 degrees Fahrenheit on 23 September 2025, versus 7.0 on 22 September 2025.
Sample. In the daily time series shown in the figure, there are 16,337 data points. The series covers the time span going from January 1981 to September 2025.
History. Here's a glimpse of a few descriptive statistics computed on the entire sample: degree days were equal on average to 2.5 degrees Fahrenheit; they attained a maximum of 20.0 on 22 July 2006; they hit a trough of 0.0 on 1 January 1981.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2025-09-21 | 4.0 |
| 2025-09-22 | 7.0 |
| 2025-09-23 | 9.0 |
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Series Metadata
| Field | Value |
|---|---|
| Description | Cooling degree days |
| Country | California (US) |
| Economic concept | Cooling 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 | (max_daily_temperature + min_daily_temperature) / 2 - 65F |
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