Athlone Weather in September
Athlone in September sees moderate daytime temperatures of 18°C (64°F) and nighttime lows of 10°C (50°F). Rainfall is fairly high this month at around 79 mm (3.1 in), so pack a rain jacket to stay dry.
Rainfall in Athlone in September
Climate statistics over the past 30 years suggest around 18 days of rain, with 79 mm (3.1 in) average for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Athlone in September
In September, Athlone gets moderate temperatures, with highs of 18°C (64°F). Nights cool to around 10°C (50°F). The difference between afternoon and evening temperatures is usually noticeable. With lows of 10°C (50°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.If you prefer dry days with pleasant temperatures, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Athlone Temperature in September
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Athlone Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Athlone - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Athlone typically stay consistent throughout September, with daily highs averaging around 18°C (64°F). Nights are cool, with lows typically ranging from 8°C (46°F) to 11°C (52°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Athlone in September
Browse day-by-day weather records for Athlone spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Athlone historical weather extremes in September
According to our 49 years of weather records for Athlone, the following extremes were recorded between 1976 and 2025.
- The warmest day in September was on September 8, 2023, with a maximum of 27°C (81°F).
- The coldest September day was on September 24, 2012, with a maximum of 10°C (50°F).
- Athlone registered its coldest September night on September 29, 2018, with temperatures dropping to 0°C (32°F).
Best Places in Ireland in September
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in September →
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).
What to Wear in Athlone in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.
What To Do in Athlone in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling6/10 -
Walking6/10 -
Camping8/10 -
Outdoor sports9/10
Athlone 3-Day Forecast
See the full Athlone climate overview or explore weather in Ireland.
Popular in September
Where to go in September - average daytime high across popular destinations.
Westport
17°C (63°F) Doolin17°C (63°F) Kilkenny
18°C (64°F) Cork18°C (64°F) Kenmare18°C (64°F) Killarney17°C (63°F) Galway18°C (64°F) Dublin18°C (64°F) 
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