Slieve Gallion (County Londonderry) weather

Headline:

Mostly dry Sunday with bright spells, Patchy light rain evening.

This Evening and Tonight:

A dry and bright evening with some late hazy sunny spells. Remaining dry overnight with clear spells at times, although cloud will increase later in the night. Minimum temperature 8 °C.

Sunday:

A dry start with some brightness or hazy sunshine. Cloud will steadily thicken through the day, bringing a few outbreaks of light, patchy rain during the evening. Maximum temperature 21 °C.

Outlook for Monday to Wednesday:

A changeable and unsettled period with spells of rain or showers, some of which will likely be occasionally heavy.

A generally changeable period looks likely and many places are likely to see some rain or showers at times, interspersed with drier and sunnier spells. Many areas will start with a few drier days, although there will be some showers in the north. There is, however, a chance that deeper low pressure brings more widespread unsettled conditions for a time. Into mid August more changeable or unsettled conditions probably become prevalent. This may be due to Atlantic frontal systems or thundery plumes moving north from the continent or a combination of both. Temperatures will likely be a little above average, and there is the potential for some very warm or hot and humid spells, especially in the south, although perhaps not the heat we have seen in recent weeks.

It will probably be changeable to start the period, with spells of unsettled weather interspersed with some drier interludes. Later into August it will most likely turn predominantly dry and settled, as high pressure patterns seem likely to influence the UK. This may be interrupted at times by Atlantic frontal systems, especially in the north, or by thunderstorms in the south. Nonetheless, overall rainfall amounts will likely be below normal. Temperatures will probably be above normal and some spells of hot weather and heatwaves are possible, especially in the south.