Llanelli in september: average Weather, Temperature and Climate
Weather in Llanelli in september 2025
The weather in Llanelli in september comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
56°F
Partly Cloudy
27% of time
24%
22%
15%
Weather at 12pm
63°F
Moderate rain at times
27% of time
26%
24%
16%
Weather at 6pm
59°F
Clear/Sunny
29% of time
27%
25%
11%
Weather at 3am
56°F
26%
26%
23%
13%
Evolution of daily average temperature and precipitation in Llanelli in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Llanelli in september.
The climate of Llanelli in september is good
The climate in september in Llanelli is wet (with 4.6in of rainfall over 7 days). The weather is better from the previous month since in august it receives an average of 5.8in of rainfall over 10 days.
The climate is quite fresh around this city this month, but it is liveable by dressing cosy. Temperatures are up to 63°F. On average, the recorded minimum temperature is 56°F. Thus, the mean temperature average on this month of september in Llanelli is 59°F. Note that seasonal normals in contrast with those observed in Llanelli in september with a maximum record of 79°F in 2021 and a minimum record of 43°F in 2012. You can expect to have about 9 days with temperatures over 65°F, or 30% of the month.
Day length in Llanelli in september is 12:39. The sun rises at 05:52 and sets at 18:31.
With a correct weather, the month of september is okay (but not the best) to go there.
Seasonal average climate and temperature of Llanelli in september
Check below seasonal norms These statistics are compiled from the weather statements of the last years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 59°F | ||||
| Highest temperature | 63°F | ||||
| Lowest temperature | 56°F | ||||
| Highest record temperature | 79°F (2021) | ||||
| Lowest record temperature | 43°F (2012) | ||||
| Number of days at +65°F | 9 day(s) (30%) | ||||
| Sea temperature | |||||
| Average sea temperature | 62°F | ||||
| Lowest sea temperature | 61°F | ||||
| Highest sea temperature | 64°F | ||||
| Wind | |||||
| Wind speed | 22km/h | ||||
| Wind temperature | 54°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.6in | ||||
| Number of days with rainfall | 7 day(s) (25%) | ||||
| Record daily rainfall | 2.2in (2018) | ||||
| Other climate data | |||||
| Humidity | 90% | ||||
| Visibility | 9.03km | ||||
| Cloud cover | 50% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:52 | ||||
| Time of sunset | 18:31 | ||||
| Length of day | 12:39 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Llanelli in september 2024:
58°F to 67°F
59°F to 65°F
56°F to 63°F
52°F to 59°F
54°F to 61°F
63°F to 68°F
56°F to 67°F
59°F to 63°F
54°F to 59°F
58°F to 59°F
52°F to 56°F
47°F to 56°F
47°F to 58°F
54°F to 59°F
58°F to 61°F
52°F to 63°F
52°F to 65°F
52°F to 68°F
54°F to 68°F
56°F to 67°F
54°F to 67°F
59°F to 65°F
59°F to 63°F
56°F to 58°F
52°F to 54°F
54°F to 58°F
50°F to 56°F
49°F to 56°F
54°F to 56°F
56°F to 59°F
Map: other cities in Wales in september
Cities near Llanelli:
| Swansea in september | good weather |
| Carmarthen in september | good weather |
| Porthcawl in september | good weather |
| Pembrokeshire in september | good weather |
| Merthyr Tydfil in september | good weather |
| Haverfordwest in september | good weather |
| Brecon Beacons (National Park) in september | tolerable weather |
| Fishguard in september | good weather |
| Barry in september | good weather |
| Cardiff in september | good weather |
| Aberystwyth in september | good weather |
| Llandrindod Wells in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Llanelli
perfect weather
good
tolerable
bad
very bad
Weather data for Llanelli in september:
Weather data for Llanelli for september are derived from an average of the weather forecast since 2009 in Llanelli. There is a margin of error and these forecasts are to be considered as general information only. The weather in Llanelli 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 Llanelli.