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Longford Weather in September
Longford in September averages 18°C (64°F) during the day and 10°C (50°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Longford in September
Typically around 19 days of rainfall are expected, averaging 81 mm (3.2 in) 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 Longford in September
In September, Longford gets moderate temperatures, with highs of 18°C (64°F). Nights cool to around 10°C (50°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 10°C (50°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.Should you favor a climate that's both dry and comfortably warm, July typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Longford Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
18°C (64°F)
Chance of Rain
63%
Precipitation
81 mm (3.2 in)
Rainy days
19 days
Longford Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Longford - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Longford 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 Longford in September
Browse day-by-day weather records for Longford spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Longford historical weather extremes in September
Our historical data for Longford spans 1976 to 2026, revealing these weather extremes.
- The warmest day in September was on September 8, 2023, with a maximum of 27°C (81°F).
- The lowest daytime temperature in September was 10°C (50°F), recorded on September 24, 2012.
- Longford registered its coldest September night on September 27, 2020, 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
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).
What to Wear in Longford in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags.
What To Do in Longford 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
Longford 3-Day Forecast
More climate data for Longford
See the full Longford 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) Bucket list
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