Glamorgan Weather by Month — Temperature & Rainfall Guide

Glamorgan is a region in the United Kingdom. Many people wonder what the weather conditions are in Glamorgan over the year. What is the best time to visit Glamorgan?

This page shows the average weather conditions by month in Glamorgan over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Glamorgan is generally less favorable. January is a winter month. In Cardiff you can expect cold maximum average daytime temperatures around 9°C (48°F) and nighttime temperatures around 4°C (39°F). On average, this month is the coldest month of the year in Glamorgan.

Find more detailed climate information for Glamorgan in January here.

In February the weather in Glamorgan is generally less favorable. February is a winter month. In Cardiff you can expect cold maximum average daytime temperatures around 9°C (48°F) and nighttime temperatures around 4°C (39°F). On average, this month is the coldest month of the year in Glamorgan.

Find more detailed climate information for Glamorgan in February here.

In March the weather in Glamorgan ranges from less favorable in Merthyr Tydfil to mixed in Cardiff. In Cardiff you can expect cold maximum average daytime temperatures around 11°C (52°F) and nighttime temperatures around 5°C (41°F).

Find more detailed climate information for Glamorgan in March here.

In April the weather in Glamorgan is generally mixed. In Cardiff you can expect mild maximum average daytime temperatures around 13°C (55°F) and nighttime temperatures around 6°C (43°F).

Find more detailed climate information for Glamorgan in April here.

In May the weather in Glamorgan ranges from mixed in Crynant to good in Cardiff. In Cardiff you can expect mild maximum average daytime temperatures around 16°C (61°F) and nighttime temperatures around 9°C (48°F).

Find more detailed climate information for Glamorgan in May here.

In June the weather in Glamorgan ranges from good in Llangennith to very good in Cardiff. The temperatures range from moderate in Llangennith with 17°C (63°F) to pleasant in Penarth with 19°C (66°F).

Find more detailed climate information for Glamorgan in June here.

In July the weather in Glamorgan ranges from very good in The Mumbles to excellent in Cardiff. July is a summer month. The average maximum daytime temperatures are pleasant and range from 19°C (66°F) in Llangennith to 21°C (70°F) in Penarth.

Find more detailed climate information for Glamorgan in July here.

In August the weather in Glamorgan ranges from good in Llangennith to excellent in Cardiff. August is a summer month. In Cardiff you can expect pleasant maximum average daytime temperatures around 20°C (68°F) and nighttime temperatures around 14°C (57°F). On average, this month is the warmest month of the year in Glamorgan.

Find more detailed climate information for Glamorgan in August here.

In September the weather in Glamorgan ranges from good in The Mumbles to very good in Cardiff. September is a summer month. In Cardiff you can expect pleasant maximum average daytime temperatures around 18°C (64°F) and nighttime temperatures around 12°C (54°F).

Find more detailed climate information for Glamorgan in September here.

In October the weather in Glamorgan is generally mixed. In Cardiff you can expect mild maximum average daytime temperatures around 15°C (59°F) and nighttime temperatures around 10°C (50°F).

Find more detailed climate information for Glamorgan in October here.

In November the weather in Glamorgan is generally less favorable. In Cardiff you can expect mild maximum average daytime temperatures around 12°C (54°F) and nighttime temperatures around 7°C (45°F).

Find more detailed climate information for Glamorgan in November here.

In December the weather in Glamorgan is generally less favorable. December is a winter month. The average maximum daytime temperatures are low and range from 8°C (46°F) in Merthyr Tydfil to 10°C (50°F) in Llangennith.

Find more detailed climate information for Glamorgan in December here.