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Day Length

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Weather

Duration of the period from sunrise to sunset.

NOAA National Weather Service — National Weather Service Glossary

Related Weather terms

Base Width
Composite Hydrograph
Duration Curve
Duration of Sunshine
DURN
Equilibrium Drawdown
Equilibrium Surface Discharge
Equilibrium Time
Flow Duration Curve
Partial-Duration Flood Series
Threshold Runoff

Nearby Weather terms

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Definitions are reproduced with attribution to their original sources; each entry links to the source and shows when it was retrieved. About · FAQ · Data build 2026-10-15.