September stays on Bannau Brycheiniog (Brecon Beacons)
Brynich Villa
Brecon · Sleeps 12
Indicative catalogue price £1,116 for 7 nightsExact September prices and availability are checked after you choose a week.What is Bannau Brycheiniog (Brecon Beacons) mountain weather like in September?
Typical mountain and low-level wind, temperature and rainfall for September, based on 40 years of weather history.
40-year mountain climate
Typical high-ground conditions in September.
Historically, September has been a variable month with a useful share of better high-ground days. Of 1,200 representative high-ground days, 28% were excellent or good, 58% were average, and 14% were poor or severe.
Dry days accounted for 61% of the sample, while extensive cloud affected 50%. These figures describe representative high ground around 886 metres, so coastal and low-level conditions can be milder.
Excellent or good28%Historically dry61%High-ground temperature8.6°CTypical maximum gust25 mphStronger days around 34 mph
Plan beyond the forecast
Choose an area and week.
Saturday dates are highlighted because they usually unlock the widest choice of seven-night cottage stays. Other arrival days still work.
Typical conditions, not a forecastThis describes representative high ground. A difficult hill day can still be suitable for a lower-level plan.
Week 37 · 12 September
What this week is typically like on Bannau Brycheiniog (Brecon Beacons) high ground.
Across 280 comparable historical hill days, 25% were excellent or good and 15% were poor or severe.
Check the live Bannau Brycheiniog (Brecon Beacons) forecast →Historically excellent or good25%280 comparable days
Excellent5%Good20%Average60%Poor15%Severe0%
Historically dry56% of daysTypical daily max gust26 mphStronger days around 35 mphTypical high ground8.6°C24-hour mean near 886 mExtensive cloud48% of days
September context: 28% of days across the month were excellent or good; 14% were poor or severe. Read the full September guide.
Valley and low level for this week
Around Brecon.
Representative base · 135 mTypical daily high16.7°CWarmer days 19.0°CHistorically dry56%54% dry with lighter windMaximum wind12 mphStronger days 16 mphTypical overnight low10.3°CCooler nights 8.4°C
Planning a different time of year?Compare Bannau Brycheiniog (Brecon Beacons) month by month
Valleys and trip bases
Low-level weather around Brecon in September.
Brecon, at roughly 135 metres, provides a practical low-level reference for Bannau Brycheiniog (Brecon Beacons). Across 1,200 historical days, the typical daytime high was 16.6°C, with warmer days around 18.8°C.
About 61% of days were dry and 59% combined dry weather with lighter winds. Conditions vary across glens, coasts and villages, so this should be used as regional trip-planning guidance rather than a forecast for every location.
Typical daily high16.6°CWarmer days around 18.8°CTypical overnight low10.3°CCooler nights around 7.9°CHistorically dry61%10% had 10 mm+ rainTypical maximum wind11 mphStronger days around 15 mph
January to December
Bannau Brycheiniog (Brecon Beacons) weather by month.
Each month has a detailed guide comparing high-ground hill days with typical conditions at a representative valley or low-level trip base.
January18% good
High ground: 55% average · 27% poor or severeBrecon: 51% dry · 7.4°C daily high
February21% good
High ground: 54% average · 25% poor or severeBrecon: 55% dry · 7.8°C daily high
March23% good
High ground: 57% average · 20% poor or severeBrecon: 56% dry · 9.5°C daily high
April29% good
High ground: 56% average · 15% poor or severeBrecon: 54% dry · 11.7°C daily high
May31% good
High ground: 56% average · 13% poor or severeBrecon: 55% dry · 14.7°C daily high
June31% good
High ground: 58% average · 11% poor or severeBrecon: 56% dry · 17.2°C daily high
July31% good
High ground: 58% average · 11% poor or severeBrecon: 55% dry · 18.7°C daily high
August29% good
High ground: 60% average · 11% poor or severeBrecon: 57% dry · 18.6°C daily high
September28% good
High ground: 58% average · 14% poor or severeBrecon: 61% dry · 16.6°C daily high
October18% good
High ground: 61% average · 21% poor or severeBrecon: 52% dry · 13.6°C daily high
November19% good
High ground: 59% average · 22% poor or severeBrecon: 51% dry · 9.9°C daily high
December16% good
High ground: 56% average · 28% poor or severeBrecon: 53% dry · 7.9°C daily high
Strongest historical signals
Best weeks of the year for Bannau Brycheiniog (Brecon Beacons) mountain weather.
These are the six week bands with the largest historical share of excellent or good days. They are useful for broad trip timing, but the live forecast should decide the final plan.
- 01Week around 17 July37% excellent or good · 10% poor or severePlan this week →
- 02Week around 19 June34% excellent or good · 9% poor or severePlan this week →
- 03Week around 10 July33% excellent or good · 11% poor or severePlan this week →
- 04Week around 4 September33% excellent or good · 12% poor or severePlan this week →
- 05Week around 15 May33% excellent or good · 14% poor or severePlan this week →
- 06Week around 17 April33% excellent or good · 15% poor or severePlan this week →
20 mountain areas
Compare another part of the UK.
Each page includes weekly and monthly high-ground and low-level climate summaries, a highlighted Saturday planner and nearby accommodation.
Angus GlensScotland · strongest historical month: May23% good Argyll and Loch LomondScotland · strongest historical month: May28% good Bannau Brycheiniog (Brecon Beacons)Wales · strongest historical month: June31% good CairngormsScotland · strongest historical month: May22% good Clwydian Range and BerwynsWales · strongest historical month: April28% good DartmoorEngland · strongest historical month: July37% good Eryri (Snowdonia)Wales · strongest historical month: May31% good Lake DistrictEngland · strongest historical month: May35% good Lewis and HarrisScotland · strongest historical month: May29% good LochaberScotland · strongest historical month: May25% good Mid Wales and Cambrian MountainsWales · strongest historical month: May32% good Monadhliath and Creag MeagaidhScotland · strongest historical month: May22% good North PenninesEngland · strongest historical month: May28% good Northumberland and CheviotsEngland · strongest historical month: May32% good Northwest HighlandsScotland · strongest historical month: May27% good Peak DistrictEngland · strongest historical month: July30% good Perthshire HighlandsScotland · strongest historical month: May25% good SkyeScotland · strongest historical month: May38% good Southern ScotlandScotland · strongest historical month: May34% good Yorkshire DalesEngland · strongest historical month: May32% good