Best year time to visit Carmarthen

General weather information about Carmarthen

Average annual temperature is 11.3 °C

Absolute maximum temperature: 27.7 °C

Absolute minimum temperature: -4.0 °C

Number of sunny days: 93 days

Number of rainy days: 271 days

Number of snow days: 1 day

Look at detailed online map of Carmarthen

* Weather data for Carmarthen United Kingdom is based on climate observations for 2026 year

Carmarthen air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	12.0	13.9	13.6	16.1	21.5	26.8	23.4	23.4	27.7	19.5	14.1	12.6
Average daytime temperature (°C)	8.2	9.4	9.6	12.4	17.2	21.7	18.1	18.6	19.9	14.8	10.6	10.0
Average temperature (°C)	5.8	6.5	7.2	8.9	12.9	17.5	15.6	15.8	16.7	12.5	8.3	8.2
Average night temperature (°C)	3.1	3.4	4.8	5.1	8.6	12.7	12.7	13.0	13.4	10.4	6.1	6.0
Absolute minimum temperature (°C)	-2.8	-1.8	-0.7	1.3	5.9	8.0	9.0	9.5	5.9	4.5	-2.2	-4.0

Carmarthen monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	10.0	12.0	14.0	16.0	16.0	16.0	15.0	13.0	11.0	9.0	8.0
Daylight mean duration (h)	8.4	10.0	11.9	13.9	15.7	16.6	16.2	14.6	12.7	10.7	8.9	7.9
Daylight minimum duration (h)	7.0	9.0	10.0	12.0	14.0	16.0	15.0	13.0	11.0	9.0	8.0	7.0
Sunshine mean duration (h)	3.6	4.5	4.3	7.7	11.5	11.7	9.2	8.5	7.3	4.3	4.3	2.4
Precipitation (mm)	192	31	271	80	55	62	207	154	174	167	134	266
Sunny days	9	15	5	9	16	14	0	1	9	5	7	3
Rainy days	21	13	26	21	15	16	31	30	21	26	23	28
Snow days	1	0	0	0	0	0	0	0	0	0	0	0

Carmarthen - weather forecast by months

Carmarthen weather in january Carmarthen weather in february Carmarthen weather in march Carmarthen weather in april Carmarthen weather in may Carmarthen weather in june Carmarthen weather in july Carmarthen weather in august Carmarthen weather in september Carmarthen weather in october Carmarthen weather in november Carmarthen weather in december

Best time to visit Carmarthen:

The best time to visit Carmarthen during the most sunny months:

May — 11.5(h)
June — 11.7(h)
July — 9.2(h)
August — 8.5(h)

Months with the longest average daylight duration in Carmarthen:

May — 15.7(h)
June — 16.6(h)
July — 16.2(h)

The largest precipitation sum in Carmarthen is at

January — 192(mm)

March — 271(mm)

July — 207(mm)

December — 266(mm)

Weather forecast in the closest to Carmarthen admin centers