Brecon Beacons (National Park) in september: average Weather, Temperature and Climate
Weather in Brecon Beacons (National Park) in september 2025
The weather in Brecon Beacons (National Park) in the month of september comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather
Weather at 6am
50°F
Fog
39% of time
21%
13%
11%
Weather at 12pm
61°F
Cloudy
33% of time
25%
18%
18%
Weather at 6pm
56°F
Partly Cloudy
28% of time
23%
21%
20%
Weather at 3am
52°F
40%
16%
15%
13%
Evolution of daily average temperature and precipitation in Brecon Beacons (National Park) in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Brecon Beacons (National Park) in september.
The climate of Brecon Beacons (National Park) in september is tolerable
the weather in Brecon Beacons (National Park) in september is wet (with 3.5in of rainfall over 5 days). It should be noted an improvement from the previous month since in august it receives an average of 4.4in of precipitation over 7 days.
The climate is relatively cold there september, but it is endurable by dressing hot. The high seasonal norm is 61°F. The seasonal minimum is 50°F. Thus, the mean temperature average on this month of september in Brecon Beacons (National Park) is 56°F. These temperatures are far removed from those records observed in Brecon Beacons (National Park) in september with a maximum record of 77°F in 2021 and a minimum record of 38°F in 2010. You can plan to have about 7 days with temperatures over 65°F, or 23% of the month.
On this month of september, day length in Brecon Beacons (National Park) is generally 12:39. Sunrise is at 05:49 and sunset is at 18:28.
With a correct weather, the month of september is okay (but not good) to go in that area.
September: another location in Wales?
If you want to go to Wales in september, there are destinations with better weather than Brecon Beacons (National Park):
In september, Cardiff, Conwy, Holyhead, Pembrokeshire, Swansea and Aberystwyth have good weather.
Seasonal average climate and temperature of Brecon Beacons (National Park) in september
Check below seasonal norms These statistics are set from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 56°F | ||||
| Highest temperature | 61°F | ||||
| Lowest temperature | 50°F | ||||
| Highest record temperature | 77°F (2021) | ||||
| Lowest record temperature | 38°F (2010) | ||||
| Number of days at +65°F | 7 day(s) (23%) | ||||
| Wind | |||||
| Wind speed | 19km/h | ||||
| Wind temperature | 49°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.5in | ||||
| Number of days with rainfall | 5 day(s) (16%) | ||||
| Record daily rainfall | 1.9in (2018) | ||||
| Other climate data | |||||
| Humidity | 96% | ||||
| Visibility | 7.53km | ||||
| Cloud cover | 61% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:49 | ||||
| Time of sunset | 18:28 | ||||
| Length of day | 12:39 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Brecon Beacons (National Park) in september 2024:
54°F to 67°F
49°F to 61°F
54°F to 59°F
45°F to 56°F
49°F to 58°F
58°F to 70°F
52°F to 63°F
58°F to 59°F
49°F to 56°F
52°F to 56°F
45°F to 50°F
38°F to 50°F
38°F to 54°F
45°F to 58°F
50°F to 59°F
45°F to 63°F
45°F to 61°F
45°F to 65°F
49°F to 67°F
49°F to 65°F
49°F to 67°F
56°F to 61°F
52°F to 61°F
50°F to 54°F
45°F to 50°F
50°F to 54°F
41°F to 50°F
43°F to 52°F
41°F to 50°F
52°F to 54°F
Map: other cities in Wales in september
Cities near Brecon Beacons (National Park):
| Merthyr Tydfil in september | good weather |
| Llandrindod Wells in september | tolerable weather |
| Swansea in september | good weather |
| Cardiff in september | good weather |
| Porthcawl in september | good weather |
| Barry in september | good weather |
| Llanelli in september | good weather |
| Newtown in september | tolerable weather |
| Carmarthen in september | good weather |
| Aberystwyth in september | good weather |
| Barmouth in september | tolerable weather |
| Pembrokeshire in september | good weather |
Click over cities on the map for information about the weather in september.
Brecon Beacons (National Park)
perfect weather
good
tolerable
bad
very bad
Weather data for Brecon Beacons (National Park) in september:
Weather data for Brecon Beacons (National Park) for september are derived from an average of the weather forecast since 2009 in Brecon Beacons (National Park). There is a margin of error and these forecasts are to be considered as general information only. The weather in Brecon Beacons (National Park) can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Brecon Beacons (National Park).