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Weather in September in Roscommon County

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

What is the weather like in Roscommon County in September?

Roscommon County is a region in Ireland. September in Roscommon County generally has mild temperatures, with moderate precipitation.

Temperatures

You can expect mild maximum daytime temperatures of around 17°C and nighttime temperatures around 10°C in Boyle.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Roscommon with an average of 83 mm to moderate rainfall in Ballyfarnon with 95 mm.

Average sunshine

Boyle experiences limited sunny days, amounting to roughly 93 hours of sunshine. This makes it perfect for those who prefer dimmer, cloudier settings rather than intense sunlit days

For a closer look at September's conditions in Roscommon County, see the map below. For a more detailed look at Roscommon County's yearly weather, check out our Roscommon County climate page.

Where to go in Roscommon County in September

Find more information for the most popular destinations in the Roscommon County on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in September for the 5 most popular destinations in Roscommon County?

Boyle

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

Boyle
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
19°C 
12°C 
118 hours 
110 mm 
20 days 
17°C 
10°C 
93 hours 
92 mm 
21 days 
October   >> October
>>  
14°C 
7°C 
74 hours 
110 mm 
22 days 
Climate in Boyle

Roscommon

In September Roscommon generally has moderate temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 10°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Roscommon
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
19°C 
12°C 
118 hours 
98 mm 
19 days 
18°C 
10°C 
93 hours 
83 mm 
19 days 
October   >> October
>>  
14°C 
8°C 
74 hours 
97 mm 
21 days 
Climate in Roscommon

Ballyfarnon

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

Ballyfarnon
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
19°C 
12°C 
118 hours 
113 mm 
20 days 
17°C 
10°C 
93 hours 
95 mm 
21 days 
October   >> October
>>  
14°C 
7°C 
74 hours 
112 mm 
22 days 
Climate in Ballyfarnon

Strokestown

In September Strokestown generally has moderate temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 10°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Strokestown
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
19°C 
12°C 
118 hours 
100 mm 
20 days 
18°C 
10°C 
93 hours 
84 mm 
20 days 
October   >> October
>>  
14°C 
8°C 
74 hours 
98 mm 
21 days 
Climate in Strokestown

Castlerea

In September Castlerea generally has moderate temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 10°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Castlerea
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
19°C 
12°C 
118 hours 
101 mm 
20 days 
18°C 
10°C 
93 hours 
87 mm 
20 days 
October   >> October
>>  
14°C 
7°C 
74 hours 
103 mm 
22 days 
Climate in Castlerea

Is your destination not in the list? Have a look at other destinations in Roscommon County, in Ireland.

Is September the best time to visit Roscommon County?

We believe that September is one of the best times to visit Roscommon County with overall tolerable weather in Boyle. It's worth noting that weather conditions might differ depending on the location you visit.

Generally speaking, May, June, July, August and September provide tolerable weather in Boyle. On the other hand, the weather in January, February, November and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in Roscommon County. Interested in the weather conditions in a specific month? Select the month below.

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

    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.