Roscommon Weather in September

September in Roscommon sees daytime temperatures around 18°C (64°F) and lows of 10°C (50°F) at night. With around 83 mm (3.3 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Roscommon in September

Analyzing past climate data, one can expect approximately 19 days of rain, averaging 83 mm (3.3 in). Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.

Temperature in Roscommon in September

In September, expect moderate temperatures in Roscommon, with highs of 18°C (64°F) and lows of 10°C (50°F) at night. Conditions are often most pleasant around the middle of the day. At 10°C (50°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Roscommon in September

The month has fewer sunny days, with around 93 hours of sunshine.

If you prefer enjoying temperate temperatures and rain-free days, July typically offers 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.

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• January
• February
• March
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• May
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• August

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• October
• November
• December

For a detailed overview over the year and the best time to visit Ireland, check out our Roscommon's climate page.

Roscommon Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 64%  

Precipitation 83 mm (3.3 in)  

Rainy days 19 days  

Humidity 83% *  

Sunshine 93 hours *  

Percentage Sunshine 26% *  

* Data from: Claremorris, Ireland (53 KM, 32 Miles).

What to Wear in Roscommon 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. Prepare for significant rainfall with proper waterproof clothing and shoes. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.

What To Do in Roscommon in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

4/10

Cycling

6/10

Walking

6/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Ireland, check out our Roscommon's climate page.

More climate data for Roscommon

Temperature Rainfall Sunshine Humidity

See the full Roscommon climate overview or explore weather in Ireland.