The early-morning fog is set to clear to leave another sunny day for Calderdale today (Wednesday).
There will be lows of 17C and highs of 24C.
Meanwhile traffic is starting to build up on the major roads in Calderdale.
Motorists face delays on King Cross Road at the junction with Parkinson Lane because of three-way temporary traffic lights.
There is heavy traffic on the A629 Calderdale Way southbound in Elland before the Ainley Top Roundabout.
Traffic on the A629 Cow Green in Halifax is busy but moving in both directions at the Bull Green junction.
On the A629 Calderdale Way in Elland traffic is busy but moving in both directions at the A6025 Halifax Road junction.
Traffic on the A641 Huddersfield Road in Brighouse is busy but moving outbound at the Bethel Street junction.
Roadworks are causing delays in Northowram on the A6036.
There are no reported problems on the trains and buses.