NOAA/NCEI Climate Normals
1991–2020 monthly temperature, precipitation and, when available, snowfall normals.
Official NOAA overview →Source directory
Primary sources behind the dataset and tools.
NOAA/NCEI recent observations
Optional daily summaries used for recent temperature context. Coverage runs through September 12, 2026.
Official API documentation →U.S. Energy Information Administration
Monthly state residential retail electricity prices. Current period: June 2026.
Official EIA dataset →Manufacturer documentation
Current manufacturer specification pages are linked directly in heater-sizing and terminology guides.
View source-linked ranges →