Londonderry County Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Londonderry County, the United Kingdom in September.

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Londonderry Portstewart Coleraine Dungiven

Considering a trip to Londonderry County, the United Kingdom this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Londonderry County in September

Londonderry County, the United Kingdom is a region in the United Kingdom. September in Londonderry County generally has mild temperatures, with precipitation levels ranging from moderate to high.

Temperatures

You can expect mild maximum daytime temperatures of around 17°C (63°F) and nighttime temperatures around 10°C (50°F) in Londonderry.

For specific regional insights in Londonderry County, the United Kingdom, refer to the map provided below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Upperlands with an average of 84 mm (3.3 in) to high rainfall in Portstewart with 107 mm (4.2 in).

Average sunshine

Sunshine is fairly consistent across many areas. Londonderry receives about 118 hours of sunlight in September, providing a good balance between sunny spells and cloud cover. If you're after more sunshine hours, take a look at our weather planner for other sun-rich destinations worldwide.

Explore Londonderry County by month

Pick a month to see the average temperature, rainfall and sunshine in Londonderry County — and find the best time to visit. (based on Londonderry)

January9°C (48°F) February9°C (48°F) March11°C (52°F) April13°C (55°F) May15°C (59°F) June17°C (63°F) This monthJuly19°C (66°F) August19°C (66°F) September17°C (63°F) October14°C (57°F) November11°C (52°F) December9°C (48°F)
Best Time to Visit Londonderry County →

Best Places to Visit in Londonderry County in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Londonderry County.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Londonderry County

What is the weather like in September for some of the most popular destinations in Londonderry County, the United Kingdom?

Temperature range in Londonderry County (September)

Precipitation variation in Londonderry County (September)

Londonderry

In September Londonderry generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
8°C (46°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
108 mm (4.3 in)
89 mm (3.5 in)
97 mm (3.8 in)
Monthly rainy days
20 days
21 days
23 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Londonderry →

Portstewart

In September Portstewart generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 12°C (54°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

« August
September
October »
August
September
October
Max temperature
17°C (63°F)
16°C (61°F)
14°C (57°F)
Min temperature
13°C (55°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
111 mm (4.4 in)
107 mm (4.2 in)
137 mm (5.4 in)
Monthly rainy days
20 days
21 days
22 days
Weather conditions
unpleasant
unpleasant
unpleasant
Climate in Portstewart →

Coleraine

In September Coleraine generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 11°C (52°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

« August
September
October »
August
September
October
Max temperature
17°C (63°F)
16°C (61°F)
14°C (57°F)
Min temperature
13°C (55°F)
11°C (52°F)
9°C (48°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
109 mm (4.3 in)
102 mm (4 in)
128 mm (5 in)
Monthly rainy days
20 days
20 days
22 days
Weather conditions
unpleasant
unpleasant
unpleasant
Climate in Coleraine →

Dungiven

In September Dungiven generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
18°C (64°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
8°C (46°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
102 mm (4 in)
88 mm (3.5 in)
102 mm (4 in)
Monthly rainy days
20 days
21 days
22 days
Weather conditions
tolerable
tolerable
unpleasant
Climate in Dungiven →

Limavady

In September Limavady generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
18°C (64°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
106 mm (4.2 in)
95 mm (3.7 in)
114 mm (4.5 in)
Monthly rainy days
20 days
21 days
22 days
Weather conditions
tolerable
tolerable
unpleasant
Climate in Limavady →

Is your destination not in the list? Have a look at all destinations in Londonderry County, in the United Kingdom.

Popular cities in September

Day & night temperatures, rainfall and average weather in Londonderry County in September.

City Weather Day temp Night temp Rainfall
Londonderry 17°C (63°F) 10°C (50°F) 89 mm (3.5 in)
Portstewart 16°C (61°F) 12°C (54°F) 107 mm (4.2 in)
Coleraine 16°C (61°F) 11°C (52°F) 102 mm (4 in)
Dungiven 17°C (63°F) 10°C (50°F) 88 mm (3.5 in)
Limavady 17°C (63°F) 11°C (52°F) 95 mm (3.7 in)
Aghadowey 17°C (63°F) 11°C (52°F) 92 mm (3.6 in)

Londonderry County weather in September: frequently asked questions

What is the weather like in Londonderry County, the United Kingdom in September?

In September, Londonderry County, the United Kingdom generally has tolerable weather conditions. Londonderry sees daytime temperatures near 17°C (63°F), with nights cooling to roughly 10°C (50°F).

What is the average temperature in Londonderry County, the United Kingdom in September?

In Londonderry, the average daytime high in September is 17°C (63°F), while nighttime temperatures drop to around 10°C (50°F).

Does Londonderry County, the United Kingdom get a lot of rain in September?

Not particularly. Londonderry averages just 89 mm (3.5 in) of rain in September, making it a mostly dry month for Londonderry County, the United Kingdom.

Is September a Good Time to Visit Londonderry County, the United Kingdom?

We consider September to be one of the best times to travel to Londonderry County, the United Kingdom. Typically, the climate in Londonderry is tolerable. However, the weather conditions may vary depending on your destination.

On average, the best time to visit Londonderry County, the United Kingdom is in May, July, August, September and October with generally tolerable weather in Londonderry. On the other hand, the weather in January, February and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in Londonderry County.

Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed historical weather averages for many cities in the United Kingdom.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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