Grantham (Lincolnshire) weather

Headline:

Warm and humid with further thundery downpours overnight and Saturday.

This Evening and Tonight:

Any heavy showers or thunderstorms soon clearing this evening. Cloud building through the night with a risk of further heavy and thundery downpours arriving from the south early on Saturday morning. Low cloud and fog developing near the coast. Muggy. Minimum temperature 18 °C.

Saturday:

Turning cooler and more unsettled with widespread, often heavy, thundery rain lasting much of the day. Rain clearing later to give another muggy night, with the risk of fog. Maximum temperature 23 °C.

Outlook for Sunday to Tuesday:

Remaining unsettled, with a mixture of sunny spells and rain or thundery showers throughout the period. Feeling warm at times in any sunny spells, with light winds away from showers

Overall a rather more changeable pattern of weather through this period, compared to much of the summer thus far. Wednesday will likely see a continuation of heavy, perhaps thundery showers, although the focus may be more across the north and east by this stage. Thereafter, a general westerly or north-westerly regime looks to become established, with occasional weather systems moving in from the Atlantic. This means further rain or showers and breezy conditions at times, especially in the northwest. This will be interspersed with some drier, sunnier periods. Temperatures are expected to be close to or a little above average for most of the period. This broad pattern is likely to continue through to the end of July.

The rather changeable pattern will likely continue through into the start of August with spells of rain or showers mixed in with some drier, brighter days. However there are signs that high pressure may become rather more dominant, which could bring more in the way dry, settled weather more widely as we progress further into the month. Temperatures will likely continue to be above average overall, with the possibility of very warm or hot spells developing period, especially further south and east.