Wales

Letterston Pressure & Humidity

Pembrokeshire — Barometric Trends

Letterston Pressure & Humidity Outlook

Across Letterston today, the barometer is near 1002 mb, on the low side of average, with humidity sitting in a comfortable middle range. That can keep things a touch more changeable, with cloud and wind shifts shaping how it feels. With a wide spread in values, the background feel can swing between steadier and more mixed spells. The later rise can help conditions calm down in places.

Across the next several days, pressure looks set to vary between 997 mb up to 1027 mb over the coming days. 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

1002 mb

Humidity

77%

Dew Point

10.1°C

Today’s Hourly Humidity

Today’s Hourly Pressure

14-Day Trends

Thu
4 Jun
86% hum
997 mb
Fri
5 Jun
77% hum
1010 mb
Sat
6 Jun
88% hum
1000 mb
Sun
7 Jun
89% hum
1017 mb
Mon
8 Jun
85% hum
1012 mb
Tue
9 Jun
79% hum
1017 mb
Wed
10 Jun
92% hum
1004 mb
Thu
11 Jun
89% hum
1008 mb
Fri
12 Jun
87% hum
1013 mb
Sat
13 Jun
86% hum
1015 mb
Sun
14 Jun
83% hum
1020 mb
Mon
15 Jun
78% hum
1022 mb
Tue
16 Jun
85% hum
1025 mb
Wed
17 Jun
85% hum
1027 mb

Humidity Chart

Pressure Chart

This page focuses on practical interpretation for Letterston. When the guidance becomes mixed, it is usually a regime question first, rather than a single hourly detail.

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

Glossary support

Start with the Weather Glossary. Useful terms for this page include Isobar, Pressure Gradient, Relative Humidity, Dew Point, Anticyclone, and Depression.

Nearby Cities — Pressure humidity

Welsh Hook
Pembrokeshire · 1.3 km
Saint Lawrence
Pembrokeshire · 3.0 km
Jordanston
Pembrokeshire · 3.7 km
Wolf’s Castle
Pembrokeshire · 3.8 km
Little Newcastle
Pembrokeshire · 3.9 km
Trecwn
Pembrokeshire · 4.0 km
← Letterston Overview

FAQ

What is the air pressure in Letterston today?

Pressure in Letterston is close to 1002 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. 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 Letterston?

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 Letterston?

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 Letterston?

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.