BBC monthly outlook
Monday 5 March—Sunday 11 March
A reduced intensity of cold and snow
With the North Atlantic jet stream still predicted to be displaced well to the south of the UK (over Spain, France and Italy) early next week, we cannot expect a rapid change to mild conditions any time soon. Indeed, temperatures remain below average for early March and further overnight frosts expected, especially in the north. With low pressure areas nearby, further snowfall is expected, especially over northern hills, but the risk is much lower from the Midland southwards. Daytime temperatures should be a little higher than this week, rising to 4-7C quite widely, locally 8-9C in far SW. Winds are unlikely to be very strong and will be much lower than normal in the north.
Low pressure areas will continue to influence the UK during the end of next week, meaning that conditions will remain unsettled. While there is a good chance that winds will pick up at times, after the low wind speeds of earlier in the week, the threat of a strong wind event is low. Temperatures are expected to stay colder than normal for March, especially so over central and northern areas of the UK, with night frosts ongoing. Snowfall can still be expected, particularly on the northern edge of individual low pressure areas, but certainly a lower risk than the past few days.
Monday 12 March—Sunday 18 March
Classic springtime weather - a bit of everything!
The middle part of March will very likely see a real mixture of weather, as high pressure ridges alternate with low pressure influence. However, it seems more likely that the third week of March will be influenced by low pressure on many days, with above normal rainfall amounts, especially in the south. Temperatures struggling to rise above the seasonal average, and snow is still likely to be a threat over some northern hills. However, in the sunshine and out of the wind, it will likely feel quite pleasant and spring like. As we head through to late March, it is more likely that high pressure ridges will develop more widely close to the UK again. This could bring some chilly weather, with frost at night, but in the daytime sunshine, temperatures creeping into the teens.
Monday 19 March—Sunday 1 April
A chillier end to March
As we move towards the end of March, indications are that high pressure should become centred to the west over the mid-Atlantic. This could allow another wave of cold air to sink south across the UK, bringing below average temperatures and a risk of springtime frosts. Rainfall should be near to below normal. The greatest chance of occasional wet weather appears to be across the east rather than the west, but snow should be mostly restricted to northern hills.
Next Update
We will be trying to accurately predict where the high pressure ridges will end up being located during the next few weeks. Wind direction is very important at this time of year for dictating temperature and whether we will see warm sunny days, or cold frosty ones under a high pressure area!
https://www.bbc.co.uk/weather/outlook