Londonderry County Weather by Month — Temperature & Rainfall Guide

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

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

In January the weather in Londonderry County is generally less favorable. January is a winter month. In Londonderry you can expect cold maximum average daytime temperatures around 9°C (48°F) and nighttime temperatures around 3°C (37°F). On average, this month is the coldest month of the year in Londonderry County.

Find more detailed climate information for Londonderry County in January here.

In February the weather in Londonderry County is generally less favorable. February is a winter month. In Londonderry you can expect cold maximum average daytime temperatures around 9°C (48°F) and nighttime temperatures around 3°C (37°F).

Find more detailed climate information for Londonderry County in February here.

In March the weather in Londonderry County ranges from less favorable in Portstewart to mixed in Londonderry. In Londonderry you can expect cold maximum average daytime temperatures around 11°C (52°F) and nighttime temperatures around 4°C (39°F).

Find more detailed climate information for Londonderry County in March here.

In April the weather in Londonderry County is generally mixed. In Londonderry you can expect mild maximum average daytime temperatures around 13°C (55°F) and nighttime temperatures around 5°C (41°F).

Find more detailed climate information for Londonderry County in April here.

In May the weather in Londonderry County ranges from mixed in Portstewart to good in Londonderry. The average maximum daytime temperatures are moderate and range from 13°C (55°F) in Portstewart to 15°C (59°F) in Londonderry.

Find more detailed climate information for Londonderry County in May here.

In June the weather in Londonderry County ranges from mixed in Londonderry to good in Portstewart. June is a summer month. The average maximum daytime temperatures are moderate and range from 15°C (59°F) in Portstewart to 17°C (63°F) in Londonderry.

Find more detailed climate information for Londonderry County in June here.

In July the weather in Londonderry County ranges from mixed in Portstewart to very good in Dungiven. July is a summer month. The temperatures range from moderate in Portstewart with 16°C (61°F) to pleasant in Upperlands with 19°C (66°F). On average, this month is the warmest month of the year in Londonderry County.

Find more detailed climate information for Londonderry County in July here.

In August the weather in Londonderry County ranges from mixed in Portstewart to good in Londonderry. August is a summer month. In Londonderry you can expect pleasant maximum average daytime temperatures around 19°C (66°F) and nighttime temperatures around 12°C (54°F).

Find more detailed climate information for Londonderry County in August here.

In September the weather in Londonderry County ranges from mixed in Portstewart to good in Londonderry. In Londonderry you can expect mild maximum average daytime temperatures around 17°C (63°F) and nighttime temperatures around 10°C (50°F).

Find more detailed climate information for Londonderry County in September here.

In October the weather in Londonderry County ranges from mixed in Portstewart to good in Londonderry. In Londonderry you can expect mild maximum average daytime temperatures around 14°C (57°F) and nighttime temperatures around 8°C (46°F).

Find more detailed climate information for Londonderry County in October here.

In November the weather in Londonderry County ranges from less favorable in Portstewart to mixed in Londonderry. In Londonderry 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 Londonderry County in November here.

In December the weather in Londonderry County is generally less favorable. December is a winter month. In Londonderry you can expect cold maximum average daytime temperatures around 9°C (48°F) and nighttime temperatures around 3°C (37°F).

Find more detailed climate information for Londonderry County in December here.