Llanymawddwy Pressure & Humidity
Gwynedd — Barometric Trends
Llanymawddwy Pressure & Humidity Outlook
Today in Llanymawddwy, the barometer sits near 994 mb, firmly on the low side, 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.
Looking ahead, pressure is expected to range between 994 mb up to 1026 mb during the period ahead. Pressure trends higher through the coming days, favouring quieter spells at times. Moisture levels fluctuate within a fairly typical range for the time of year.
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
For Llanymawddwy, the forecast is best read as a combination of short-range detail and broader regime. The first few days carry the highest timing confidence, while later periods describe direction and pattern.
- 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 Llanymawddwy today?
Right now, Llanymawddwy is near 994 mb for atmospheric pressure. It provides useful background context — especially whether the wider pattern leans more settled or more changeable. Relative humidity is around 97%, meaning the air is very moist; in calmer spells, low cloud or a touch of mist becomes more likely. Looking further ahead, pressure edges higher overall, which can favour a steadier background later in the period.
What counts as high or low pressure in the UK?
There is no single cut-off, but as a practical UK guide: the low 1020s (around 1020 mb–1024 mb) often leans more settled, while the low 1000s (around 1000 mb–1004 mb) is more commonly tied to Atlantic lows nearby. The pressure gradient and the direction of travel are usually more telling than the exact number.
How does pressure affect wind in Llanymawddwy?
It is not the absolute pressure that matters most, but how steeply it changes from place to place. A sharper gradient can bring brisk winds; a weaker gradient tends to keep winds lighter.
Does low pressure always mean rain in Llanymawddwy?
It can raise the risk of showers or rain, but it does not guarantee it. The detail depends on fronts, moisture supply and how the system moves through the region.
What does humidity mean for comfort in Llanymawddwy?
Humidity describes how close the air is to being saturated. Higher humidity can feel clammy and can support haze or low cloud in calmer conditions; lower humidity often feels crisper and helps things dry more quickly. Humidity is generally typical, with day-to-day comfort shaped more by wind and cloud than by a persistent moisture signal.