Carrigallen has some of the coldest winter nights among Irish towns
July afternoons average 19.3°C. Rain peaks in December and eases off in May. Summers stay cool: July afternoons here are cooler than in 89% of Irish towns. Warm coats and heating bills mark the months from October to April, when means dip under 10°C.
Met Éireann 1991–2020 averages for the town’s own square kilometre.
A year in Carrigallen at a glance
Each month’s typical high and low, in °C.
What stands out about Carrigallen’s climate
Compared with Irish towns, with its place among towns of 2,500+ in County Leitrim beside it.
What a year in Carrigallen feels like
Typical highs and lows by season and by month, from Met Éireann’s 1991–2020 averages.
40 frosts and 2 days of 25°C a year
Ground frosts, when the grass drops below 0°C, come on about 88 nights a year. Air frosts come mostly from October to April, most of all in February (about 8).
Air frosts by month
Average nights below 0°C
Ground frosts by month
Average nights with the grass below 0°C
Counted from Ballyhaise’s daily readings, 2003–2020, 24 km east of Carrigallen: Met Éireann publishes these for its stations only.
About 1,147 mm of rain a year
December is the wettest month and May the driest. The wettest month brings about 1.7 times the rain of the driest. Ballyhaise records 1 mm or more on about 171 days a year, and 10 mm on about 27.
Rain by month
Millimetres
Heating a home in Carrigallen
84% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Degree days add up how far each day’s mean temperature falls below 15.5°C over a year.
Living with Carrigallen’s climate
What the averages mean for a garden, a free afternoon and a bad-weather day.
In half of years the last air frost at Ballyhaise comes by 20 April and the first by 26 October: about 189 frost-free days in between.
Highs of 17–27°C with lows of 8°C or more: Jun, Jul and Aug.
Parks & trails →Averages smooth over storms, floods and heatwaves; Carrigallen’s hazards page covers the risks.
Flood & hazards →Met Éireann’s nearest station: Ballyhaise
Ballyhaise is 24 km east of Carrigallen, the nearest of the 25 synoptic stations where Met Éireann records the weather around the clock. The station stands 78 m above sea level; Carrigallen’s centre, 81 m.
| Month | High | Low | Rain | Air frosts |
|---|---|---|---|---|
| January | 7.6°C | 2.1°C | 100 mm | 7.9 |
| February | 8.0°C | 1.8°C | 76 mm | 8.4 |
| March | 9.8°C | 2.2°C | 79 mm | 7.3 |
| April | 12.6°C | 4.0°C | 60 mm | 2.9 |
| May | 15.3°C | 6.5°C | 66 mm | 0.3 |
| June | 18.0°C | 9.4°C | 70 mm | 0.0 |
| July | 19.1°C | 11.2°C | 92 mm | 0.0 |
| August | 18.2°C | 10.9°C | 104 mm | 0.0 |
| September | 16.5°C | 9.0°C | 81 mm | 0.1 |
| October | 13.4°C | 6.6°C | 96 mm | 1.3 |
| November | 9.7°C | 3.9°C | 98 mm | 4.1 |
| December | 7.8°C | 2.4°C | 99 mm | 7.3 |
| Year | 13.0°C | 5.8°C | 1,022 mm | 40 |
The table is Ballyhaise’s own record, averaged over 2003–2020 from its daily readings (ours, not a Met Éireann table). The temperatures and rain elsewhere on this page are Met Éireann’s 1 km grid at Carrigallen itself; the frosts and degree days are this station’s.
How Carrigallen compares
Against the 321 Irish towns and city neighbourhoods of 2,500 or more, each read from Met Éireann’s grid at its own centre, and its place among towns of 2,500+ in County Leitrim.
Warmer than it used to be
Carrigallen’s 1991–2020 average is 0.3°C warmer than 1981–2010’s. The biggest change is in February (+0.4°C).
A year’s rain is 1,147 mm, up 2% from 1,120 mm.
Change by month
The two periods share 1991–2010, so the gap is a decade’s step, not the change between two separate 30-year periods.
Carrigallen and its neighbours
Every town next door is within half a degree of Carrigallen in January and July. Choose a measure to recolour the map; tap a town for its climate.
The towns next door, side by side
The nearest towns of 1,000+ within 19 km: a hill, a valley or the sea can make a real difference over a short distance.
| Town | July high | January low | Rain a year |
|---|---|---|---|
| Carrigallen | 19.3°C | 1.8°C | 1,147 mm |
| Ballinamore 13 km | 19.1°C about the same | 1.8°C about the same | 1,239 mm |
| Mohill 16 km | 19.5°C about the same | 2.0°C about the same | 1,112 mm |
| Ballyconnell 16 km | 19.3°C about the same | 1.8°C about the same | 1,193 mm |
| Ballinagh 16 km | 19.6°C about the same | 1.8°C about the same | 1,076 mm |
| Cavan 19 km | 19.6°C about the same | 1.9°C about the same | 1,037 mm |
| Belturbet 19 km | 19.5°C about the same | 2.0°C about the same | 1,024 mm |
Each town’s colour is Met Éireann’s 1 km grid at its own centre, so towns a few kilometres apart can differ.
Carrigallen weather by month
Average daily high and low, mean temperature and rain, 1991–2020, for the town itself (Met Éireann’s 1 km grid).
| Month | High | Low | Mean | Rain |
|---|---|---|---|---|
| January | 7.6°C | 1.8°C | 4.7°C | 114 mm |
| February | 8.4°C | 1.6°C | 5.0°C | 91 mm |
| March | 10.2°C | 2.6°C | 6.4°C | 88 mm |
| April | 12.9°C | 4.1°C | 8.5°C | 75 mm |
| May | 15.7°C | 6.5°C | 11.1°C | 73 mm |
| June | 18.0°C | 9.2°C | 13.6°C | 81 mm |
| July | 19.3°C | 11.1°C | 15.2°C | 87 mm |
| August | 19.0°C | 10.9°C | 15.0°C | 102 mm |
| September | 16.9°C | 8.9°C | 12.9°C | 86 mm |
| October | 13.4°C | 6.2°C | 9.8°C | 114 mm |
| November | 9.9°C | 3.7°C | 6.8°C | 116 mm |
| December | 7.8°C | 1.9°C | 4.8°C | 120 mm |
| Year | 13.3°C | 5.7°C | 9.5°C | 1,147 mm |
How much a month can swing
December swings the most: over 18 years its average ranged from −1.4°C (2010) to 7.8°C (2015). August is the most reliable, staying within 2.2°C.
Where Carrigallen’s numbers come from
Averages over 30 years, not a forecast: the town’s own from Met Éireann’s grid, the frosts and degree days from its nearest station.
- Temperature and rain: Met Éireann’s 1991–2020 averages on its 1 km grid (Climatological Notes 22 and 23), read at the grid point nearest Carrigallen’s population centre (0.4 km away).
- Weather station: the nearest of Met Éireann’s 25 synoptic stations, Ballyhaise, 24 km east, from Met Éireann’s station list.
- Frosts and degree days: Ballyhaise’s daily readings from Met Éireann (clidata.met.ie), 2003–2020, averaged by month: a month counts when 27 or more of its days were read (rain and sunshine: every day), and a figure needs 10 such years.
- Then and now: Met Éireann’s 1981–2010 averages on the same 1 km grid, at the same point.
- Altitudes: the town’s ground from the Copernicus GLO-30 surface model (a few metres high in built-up places), the station’s from Met Éireann.
- Comparisons: every Irish town and city neighbourhood of 2,500 or more, read the same way; the five city totals are left out.
- Not on this page: sunshine at this station, snow and wind. Met Éireann publishes none of them on a grid; the frosts here are its nearest station’s, not the town’s own.
Met Éireann 30-year averages · Met Éireann open data. Under Creative Commons Attribution 4.0 (CC BY 4.0).
Questions about Carrigallen’s climate
How warm does Carrigallen get in summer?
July is the warmest month, with average highs of 19.3°C.
How cold does Carrigallen get in winter?
The coldest nights come in February, averaging 1.6°C. At Ballyhaise, the nearest Met Éireann station, the air drops below 0°C on about 40 nights a year (2003–2020).
How much rain does Carrigallen get?
About 1,147 mm a year, more than 82% of Irish towns. December is the wettest month (120 mm) and May the driest (73 mm).
How sunny is it?
Met Éireann publishes its 1991–2020 sunshine averages for its weather stations only, not on the 1 km grid this page reads, so there is no sunshine figure for Carrigallen itself. Its nearest synoptic station is Ballyhaise.
Are these figures for Carrigallen itself?
Partly. The temperatures and rain are Met Éireann’s 1991–2020 averages on its 1 km grid, read at Carrigallen’s population centre; the frosts, degree days and year-to-year swings are those of Ballyhaise, 24 km east, the nearest of its synoptic stations.
Where do these figures come from?
Met Éireann’s 1991–2020 climate averages, published as maps of Ireland in 1 km squares (Climatological Notes 22 and 23); the page reads the square at Carrigallen’s population centre. They are 30-year averages, not a forecast.
Copyright Met Éireann. Source: www.met.ie. This data is published under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Met Éireann does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use. This material has been modified from the original: TownRatings reads the 1 km grid at each town’s population centre. Today’s forecast for Carrigallen →
Contains Central Statistics Office (CSO) data, Census 2022, and Tailte Éireann boundaries (CSO Urban Areas, Small Areas, local electoral areas, constituencies), under Creative Commons Attribution 4.0 (CC BY 4.0).