Llanerfyl Pressure & Humidity
Powys — Barometric Trends
Llanerfyl Pressure & Humidity Outlook
For Llanerfyl today, pressure is around 994 mb, notably low for the season, with humidity running high, so it can feel a bit close at times. That keeps the background more unsettled, with conditions more likely to shift as systems move through. The range looks fairly wide across the outlook, so the support for settled weather may come and go. A gentle rise later on would slightly favour more settled spells.
Through the period, pressure is projected to run between 994 mb and 1024 mb across the outlook period. Pressure trends higher through the coming days, favouring quieter spells at times. Humidity looks generally high, which can help low cloud to linger in calmer spells.
Current Readings
Pressure
Humidity
Dew Point
Today’s Hourly Humidity
Today’s Hourly Pressure
14-Day Trends
Humidity Chart
Pressure Chart
Forecast context and reference links
When forecasts change between updates, it is commonly driven by small shifts in storm track or blocking position. The links below give stable context that helps you read those changes.
- Wales Climate for regional patterns and seasonal tendencies.
- UK Climate Overview for a national baseline and how regions compare.
- Wales for location browsing and regional navigation.
How to interpret confidence
For how forecast reliability changes with lead time, see Forecast Confidence. For transparency on how WeatherEngland sources and updates data, see Methodology.
Background guides
- UK Weather Patterns
- UK Seasonal Weather
- UK Weather Hazards
- UK Weather Safety
- UK Jet Stream
- UK Microclimates
Glossary support
Start with the Weather Glossary. Useful terms for this page include Isobar, Pressure Gradient, Relative Humidity, Dew Point, Anticyclone, and Depression.
FAQ
What is the air pressure in Llanerfyl today?
Pressure in Llanerfyl is close to 994 mb right now. Think of it as the background state of the atmosphere; the timing of cloud and rain still depends on the next weather system. Humidity is near 90%, so the air is close to saturation — conditions where low cloud or reduced visibility can become more likely if winds ease, especially overnight. As the period goes on, the barometer tends to lift, supporting a more settled background pattern at times.
What counts as high or low pressure in the UK?
As a rough guide, the low 1020s (around 1020 mb–1024 mb) tends to be a more settled signal, while the low 1000s (around 1000 mb–1004 mb) more often points to Atlantic influence. The overall pattern matters more than any single reading.
How does pressure affect wind in Llanerfyl?
Wind strength is driven mainly by the pressure gradient — how quickly pressure changes over distance. Tightly packed isobars usually mean stronger winds; a slack pattern often allows lighter winds, regardless of whether the headline pressure is high or low.
Does low pressure always mean rain in Llanerfyl?
No. Low pressure increases the chance of changeable weather, but the wettest rain bands can miss your area entirely depending on where fronts set up.
What does humidity mean for comfort in Llanerfyl?
It reflects how much moisture the air is holding compared with its maximum. Higher values can favour haze or low cloud, especially when winds are light. Humidity is frequently elevated through the period, which can keep the air feeling damp and occasionally reduce visibility in lighter winds.