Petworth (West Sussex) weather

Headline:

Mostly dry Saturday with some bright spells.

This Evening and Tonight:

Variable cloud cover into the overnight period with any longer cloud breaks leading to isolated mist and fog patches developing. Rural grass frost is possible too. Minimum temperature 3 °C.

Saturday:

Any mist and fog patches soon clearing to leave a generally dry day with bright or sunny spells, The best of the brightness in the east, cloudier further west. Maximum temperature 19 °C.

Outlook for Sunday to Tuesday:

Sunday cloud and patchy rain slowly clears east. Settled conditions follow into the working week with patchy mist, fog, and grass frost most mornings and bright spells by day.

A northwest-southeast split in conditions to start, with spells of rain and strong winds affecting northwestern areas and predominantly dry weather towards the southeast. As Hurricane Humberto moves into the North Atlantic and loses its tropical characteristics, this will likely have an influence on the UK's weather, with the potential for a more widely unsettled and windy spell around the first weekend of October. Beyond here, confidence in the details remains low, owing to the potential for further Atlantic tropical cyclone activity, but further spells of wet and windy weather are possible, more likely across northern areas, with lengthier drier spells in the south. Temperatures probably generally near to a little above average by day, though the possibility of chilly nights and overnight fog later on in the south.

A continuation of the broad patterns from the end of the 6-15 day forecast is anticipated at first, with the more unsettled conditions focussed towards northern areas and the best of the drier interludes further south. From around mid October, there is a signal for more widely unsettled weather to develop, with more frequent bouts of wet and windy weather affecting a greater portion of the UK. Given the likelihood of westerly winds predominating, temperatures should average out a little above the seasonal norm, with overnight temperatures more often relatively mild, probably with a reduced incidence of overnight fog, compared to normal.