Roscommon weather by month

Check out Roscommon weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature
Rainfall
Sunshine & UV index

Temperature in Roscommon (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	7	8	10	12	15	18	19	19	16	13	9	8
Min temperature (night-time)	1	1	2	3	6	9	11	10	8	6	3	2
Heat & Humidity	0	0	0	0	0	0	0	0	0	0	0	0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Roscommon

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	2	2	3	5	5	5	4	4	3	3	2	1
Daily hours of daylight	8	10	12	14	16	17	16	15	13	11	9	8
UV Index (Maximum)	0	1	2	4	5	6	6	5	4	2	1	0

Rainfall in Roscommon

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	22	18	21	17	18	17	17	20	20	21	21	21
Average monthly rainfall (mm)	100	69	76	60	74	68	68	86	96	103	100	102

More about Roscommon

Roscommon by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ireland

Fred Olsen: Top cruise offers for 2026/2027

Sale

Explore latest offers on Fred Olsen Cruises in 2026/2027
Find last minute deals or early bird discounts
Filter offers by price, destination, ship & departure point

Go to Fred Olsen deal >>

View all Fred Olsen offers

Cruise deal finder

Destination

The climate guide for Ireland (Roscommon) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Roscommon?

Roscommon has a temperate climate with warm summers and some rainfall in all months.

Roscommon weather in January

Expect daytime maximum temperatures of 7°C in Roscommon, Ireland in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 22 days with some rainfall and typically 100 mm of rainfall in the month.

7
7°C max day temperature
2
2 hours of sunshine per day
22
22 days with some rainfall
1
1°C min night temperature
8
8 hours of daylight per day
0
No heat & humidity
100
100 mm of monthly rainfall
0
No UV (Maximum) Index UV index

Back to months

Roscommon weather in February

Expect daytime maximum temperatures of 8°C in Roscommon, Ireland in February based on long-term weather averages. There are 2 hours of sunshine per day on average with 18 days with some rainfall and typically 69 mm of rainfall in the month.

8
8°C max day temperature
2
2 hours of sunshine per day
18
18 days with some rainfall
1
1°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
69
69 mm of monthly rainfall
1
1 (Low) UV index

Back to months

Roscommon weather in March

Expect daytime maximum temperatures of 10°C in Roscommon, Ireland in March based on long-term weather averages. There are 3 hours of sunshine per day on average with 21 days with some rainfall and typically 76 mm of rainfall in the month.

10
10°C max day temperature
3
3 hours of sunshine per day
21
21 days with some rainfall
2
2°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
76
76 mm of monthly rainfall
2
2 (Low) UV index

Back to months

Roscommon weather in April

Expect daytime maximum temperatures of 12°C in Roscommon, Ireland in April based on long-term weather averages. There are 5 hours of sunshine per day on average with 17 days with some rainfall and typically 60 mm of rainfall in the month.

12
12°C max day temperature
5
5 hours of sunshine per day
17
17 days with some rainfall
3
3°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
60
60 mm of monthly rainfall
4
4 (Moderate) UV index

Back to months

Roscommon weather in May

Expect daytime maximum temperatures of 15°C in Roscommon, Ireland in May based on long-term weather averages. There are 5 hours of sunshine per day on average with 18 days with some rainfall and typically 74 mm of rainfall in the month.

15
15°C max day temperature
5
5 hours of sunshine per day
18
18 days with some rainfall
6
6°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
74
74 mm of monthly rainfall
5
5 (Moderate) UV index

Back to months

Roscommon weather in June

Expect daytime maximum temperatures of 18°C in Roscommon, Ireland in June based on long-term weather averages. There are 5 hours of sunshine per day on average with 17 days with some rainfall and typically 68 mm of rainfall in the month.

18
18°C max day temperature
5
5 hours of sunshine per day
17
17 days with some rainfall
9
9°C min night temperature
17
17 hours of daylight per day
0
No heat & humidity
68
68 mm of monthly rainfall
6
6 (High) UV index

Back to months

Roscommon weather in July

Expect daytime maximum temperatures of 19°C in Roscommon, Ireland in July based on long-term weather averages. There are 4 hours of sunshine per day on average with 17 days with some rainfall and typically 68 mm of rainfall in the month.

19
19°C max day temperature
4
4 hours of sunshine per day
17
17 days with some rainfall
11
11°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
68
68 mm of monthly rainfall
6
6 (High) UV index

Back to months

Roscommon weather in August

Expect daytime maximum temperatures of 19°C in Roscommon, Ireland in August based on long-term weather averages. There are 4 hours of sunshine per day on average with 20 days with some rainfall and typically 86 mm of rainfall in the month.

19
19°C max day temperature
4
4 hours of sunshine per day
20
20 days with some rainfall
10
10°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
86
86 mm of monthly rainfall
5
5 (Moderate) UV index

Back to months

Roscommon weather in September

Expect daytime maximum temperatures of 16°C in Roscommon, Ireland in September based on long-term weather averages. There are 3 hours of sunshine per day on average with 20 days with some rainfall and typically 96 mm of rainfall in the month.

16
16°C max day temperature
3
3 hours of sunshine per day
20
20 days with some rainfall
8
8°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
96
96 mm of monthly rainfall
4
4 (Moderate) UV index

Back to months

Roscommon weather in October

Expect daytime maximum temperatures of 13°C in Roscommon, Ireland in October based on long-term weather averages. There are 3 hours of sunshine per day on average with 21 days with some rainfall and typically 103 mm of rainfall in the month.

13
13°C max day temperature
3
3 hours of sunshine per day
21
21 days with some rainfall
6
6°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
103
103 mm of monthly rainfall
2
2 (Low) UV index

Back to months

Roscommon weather in November

Expect daytime maximum temperatures of 9°C in Roscommon, Ireland in November based on long-term weather averages. There are 2 hours of sunshine per day on average with 21 days with some rainfall and typically 100 mm of rainfall in the month.

9
9°C max day temperature
2
2 hours of sunshine per day
21
21 days with some rainfall
3
3°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
100
100 mm of monthly rainfall
1
1 (Low) UV index

Back to months

Roscommon weather in December

Expect daytime maximum temperatures of 8°C in Roscommon, Ireland in December based on long-term weather averages. There is 1 hour of sunshine per day on average with 21 days with some rainfall and typically 102 mm of rainfall in the month.