Gwynedd Weather by Month: Temperature & Rainfall Guide

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

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

In January the weather in Gwynedd is generally less favorable. January is a winter month. The average maximum daytime temperatures are low and range from 7°C (45°F) in Llandderfel to 10°C (50°F) in Aberdaron. On average, this month is the coldest month of the year in Gwynedd.

Find more detailed climate information for Gwynedd in January here.

In February the weather in Gwynedd is generally less favorable. February is a winter month. The average maximum daytime temperatures are low and range from 8°C (46°F) in Llandderfel to 10°C (50°F) in Valley.

Find more detailed climate information for Gwynedd in February here.

In March the weather in Gwynedd ranges from less favorable in Llandudno to mixed in Conwy. In Llandudno you can expect cold maximum average daytime temperatures around 10°C (50°F) and nighttime temperatures around 4°C (39°F).

Find more detailed climate information for Gwynedd in March here.

In April the weather in Gwynedd is generally mixed. In Llandudno you can expect mild maximum average daytime temperatures around 12°C (54°F) and nighttime temperatures around 6°C (43°F).

Find more detailed climate information for Gwynedd in April here.

In May the weather in Gwynedd ranges from mixed in Aberdaron to good in Llandudno. The average maximum daytime temperatures are moderate and range from 13°C (55°F) in Aberdaron to 16°C (61°F) in Llanfairfechan.

Find more detailed climate information for Gwynedd in May here.

In June the weather in Gwynedd ranges from mixed in Criccieth to very good in Llandudno. June is a summer month. The temperatures range from moderate in Aberdaron with 15°C (59°F) to pleasant in Llanfairfechan with 18°C (64°F).

Find more detailed climate information for Gwynedd in June here.

In July the weather in Gwynedd ranges from mixed in Dinas to excellent in Llandudno. July is a summer month. The temperatures range from moderate in Aberdaron with 17°C (63°F) to pleasant in Llanfairfechan with 20°C (68°F). On average, this month is the warmest month of the year in Gwynedd.

Find more detailed climate information for Gwynedd in July here.

In August the weather in Gwynedd ranges from good in Criccieth to excellent in Conwy. August is a summer month. The temperatures range from moderate in Aberdaron with 18°C (64°F) to pleasant in Llangefni with 20°C (68°F).

Find more detailed climate information for Gwynedd in August here.

In September the weather in Gwynedd ranges from mixed in Criccieth to very good in Llandudno. In Llandudno you can expect mild maximum average daytime temperatures around 18°C (64°F) and nighttime temperatures around 11°C (52°F).

Find more detailed climate information for Gwynedd in September here.

In October the weather in Gwynedd ranges from less favorable in Dinas to good in Conwy. In Llandudno you can expect mild maximum average daytime temperatures around 15°C (59°F) and nighttime temperatures around 9°C (48°F).

Find more detailed climate information for Gwynedd in October here.

In November the weather in Gwynedd is generally less favorable. The temperatures range from low in Bala with 10°C (50°F) to moderate in Aberdaron with 13°C (55°F).

Find more detailed climate information for Gwynedd in November here.

In December the weather in Gwynedd is generally less favorable. December is a winter month. The average maximum daytime temperatures are low and range from 8°C (46°F) in Llandderfel to 11°C (52°F) in Aberdaron.

Find more detailed climate information for Gwynedd in December here.