Grantham (Lincolnshire) weather

Headline:

Chilly with sunny spells

Today:

A chilly and locally frosty start will lead into a colder, mostly fine day. Any isolated early showers to the north dying away to leave most places dry with plenty of sunny spells. Breezy at first, but winds soon easing. Maximum temperature 8 °C.

Tonight:

A cold, dry, and mostly clear night with widespread frost and light winds, with the possibility of a few patches of freezing fog forming by dawn. Minimum temperature -2 °C.

Thursday:

Any patches of mist or freezing fog clearing through the morning to give a dry day with plenty of long sunny spells. Widespread frost and freezing fog patches redeveloping overnight. Maximum temperature 7 °C.

Outlook for Friday to Sunday:

Turning colder through this period with widespread frosts. Some sunshine Friday, but cloud amounts increasing into the weekend with a strengthening easterly breeze bringing an increasing risk of wintry showers.

High pressure will likely sit to the northeast of the UK during this period. Consequently, winds across many areas are likely to come from an easterly quadrant, exacerbating the cold feel, with temperatures often below average. At first, there is the chance of more widespread precipitation, most likely mainly rain, across southernmost areas, before this clears away. Thereafter, there is a risk of some sleet or snow showers feeding in on the east to southeasterly wind, though many places may remain dry. Also a small chance of Atlantic fronts making inroads from the west, especially later in this period, which could also bring the possibility of at least transient snow. Overnight frost is likely to feature during this period, particularly where skies are clear.

Weather patterns in the UK are most likely to be slowly evolving during this period. It is most likely that high pressure to the east or northeast of the UK will dominate at first in some form or another, but with time this may decline, allowing an erratic transition to rather more unsettled and possibly less cold conditions. During this transition there is the possibility of more prolonged rain or snow developing, at least for a time, but confidence in these details is currently very low.