Time Since Temperature

When was the last time this location was actually as hot — or as cold — as today's forecast? Each grid cell looks back at every observed daily maximum (or minimum) from 1979 to yesterday and reports the most recent day that matched or exceeded today's NDFD forecast. A reading of 30 days means “this hot last happened a month ago.” A reading of 5,000 days means “this hot is overdue by more than a decade.” Toggle between the forecast high and the forecast low below.

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This is an independent project and is not an official product of the National Weather Service or NOAA. Data: NWS NDFD forecast highs/lows for today, compared against RCC-ACIS daily station observations (~6,800 CONUS stations) from 1979 to yesterday, interpolated to a 0.25° grid.

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Pacific Northwest
Northern Plains
Upper Midwest
Northeast
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Midwest
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Pacific Northwest
Northern Plains
Upper Midwest
Northeast
West
Southern Plains
Midwest
Southeast