Cooling degree days (F) - Connecticut (US) - NOAA - Daily
This series is part of the dataset: Heating and cooling degree days (NOAA)
Download Full Dataset (.xlsx)Latest updates. In Connecticut, cooling degree days were 1.0 degrees Fahrenheit on 21 June 2026, versus 3.0 on 20 June 2026.
Sample. There are 16,608 records overall in the daily time series displayed in the plot above. The series covers the span of time stretching from January 1981 to June 2026.
History. Take a look at a few simple statistics we calculated on the entire sample: degree days reached their maximum of 22.0 degrees Fahrenheit on 22 July 2011; they reached their minimum of 0.0 on 1 January 1981; they averaged 1.8.
Latest values
| Date | Value - Degrees Fahrenheit |
|---|---|
| 2026-06-19 | 5.0 |
| 2026-06-20 | 3.0 |
| 2026-06-21 | 1.0 |
Suggestion. An advantage of our data visualization and download service is that we publish rich metadata. Find it below to learn more about the properties of the time series that you analyze.
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Series Metadata
| Field | Value |
|---|---|
| Description | Cooling degree days |
| Country | Connecticut (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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