Hardly any Irish towns see fresher July days than Westport
On a normal January night the air cools to about 2.8°C. A year here swings 16°C from midwinter lows to midsummer highs. Rain is plentiful here, more than falls on 98% of Irish towns. Central heating does most of its work from November to April, in months below 10°C on average.
Met Éireann 1991–2020 averages for the town’s own square kilometre.
A year in Westport at a glance
Each month’s typical high and low, in °C.
What stands out about Westport’s climate
Compared with Irish towns, with its place among towns of 2,500+ in County Mayo beside it.
What a year in Westport feels like
Typical highs and lows by season and by month, from Met Éireann’s 1991–2020 averages.
10 frosts and 3 days of 25°C a year
Air frosts come mostly from December to March, most of all in January (about 3).
Air frosts by month
Average nights below 0°C
Counted from Newport’s daily readings, 2005–2020, 14 km north of Westport: Met Éireann publishes these for its stations only.
About 1,456 mm of rain a year
December is the wettest month and June the driest. 2nd wettest of 6 towns of 2,500+ in County Mayo. The wettest month brings about 2.0 times the rain of the driest. Newport records 1 mm or more on about 223 days a year, and 10 mm on about 58.
Rain by month
Millimetres
Heating a home in Westport
85% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Degree days add up how far each day’s mean temperature falls below 15.5°C over a year.
Living with Westport’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 Newport comes by 21 February and the first by 3 December: about 285 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; Westport’s hazards page covers the risks.
Flood & hazards →Met Éireann’s nearest station: Newport
Newport is 14 km north of Westport, the nearest of the 25 synoptic stations where Met Éireann records the weather around the clock. The station stands 22 m above sea level; Westport’s centre, 20 m.
| Month | High | Low | Rain | Air frosts |
|---|---|---|---|---|
| January | 8.6°C | 3.6°C | 174 mm | 3.0 |
| February | 8.9°C | 3.5°C | 152 mm | 2.6 |
| March | 10.5°C | 4.0°C | 129 mm | 1.8 |
| April | 13.4°C | 5.7°C | 85 mm | 0.1 |
| May | 15.5°C | 8.0°C | 101 mm | 0.0 |
| June | 17.7°C | 10.5°C | 93 mm | 0.0 |
| July | 18.6°C | 12.0°C | 115 mm | 0.0 |
| August | 18.0°C | 11.9°C | 144 mm | 0.0 |
| September | 16.7°C | 10.5°C | 150 mm | 0.0 |
| October | 14.2°C | 8.4°C | 148 mm | 0.0 |
| November | 10.7°C | 5.7°C | 186 mm | 0.5 |
| December | 9.0°C | 4.3°C | 194 mm | 1.9 |
| Year | 13.5°C | 7.3°C | 1,669 mm | 10 |
The table is Newport’s own record, averaged over 2005–2020 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 Westport itself; the frosts and degree days are this station’s.
How Westport 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 Mayo.
Warmer than it used to be
Westport’s 1991–2020 average is 0.2°C warmer than 1981–2010’s. The biggest change is in February (+0.4°C).
A year’s rain is 1,456 mm, up 3% from 1,419 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.
Nearby towns’ climate
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 |
|---|---|---|---|
| Westport | 18.4°C | 2.8°C | 1,456 mm |
| Castlebar 16 km | 18.7°C about the same | 2.6°C about the same | 1,467 mm |
Westport 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 | 8.5°C | 2.8°C | 5.6°C | 161 mm |
| February | 8.9°C | 2.7°C | 5.8°C | 131 mm |
| March | 10.4°C | 3.6°C | 7.0°C | 110 mm |
| April | 12.8°C | 5.0°C | 8.9°C | 89 mm |
| May | 15.2°C | 7.3°C | 11.3°C | 86 mm |
| June | 17.2°C | 9.7°C | 13.5°C | 85 mm |
| July | 18.4°C | 11.6°C | 15.0°C | 90 mm |
| August | 18.2°C | 11.4°C | 14.8°C | 110 mm |
| September | 16.7°C | 9.8°C | 13.2°C | 113 mm |
| October | 13.6°C | 7.2°C | 10.4°C | 143 mm |
| November | 10.7°C | 4.9°C | 7.8°C | 166 mm |
| December | 8.8°C | 3.2°C | 6.0°C | 172 mm |
| Year | 13.3°C | 6.6°C | 9.9°C | 1,456 mm |
How much a month can swing
December swings the most: over 16 years its average ranged from 2.3°C (2010) to 8.2°C (2015). September is the most reliable, staying within 2.5°C.
Where Westport’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 Westport’s population centre (0.6 km away).
- Weather station: the nearest of Met Éireann’s 25 synoptic stations, Newport, 14 km north, from Met Éireann’s station list.
- Frosts and degree days: Newport’s daily readings from Met Éireann (clidata.met.ie), 2005–2020, 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 Westport’s climate
How warm does Westport get in summer?
July is the warmest month, with average highs of 18.4°C.
How cold does Westport get in winter?
The coldest nights come in February, averaging 2.7°C. At Newport, the nearest Met Éireann station, the air drops below 0°C on about 10 nights a year (2005–2020).
How much rain does Westport get?
About 1,456 mm a year, more than 98% of Irish towns. December is the wettest month (172 mm) and June the driest (85 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 Westport itself. Its nearest synoptic station is Newport.
Are these figures for Westport itself?
Partly. The temperatures and rain are Met Éireann’s 1991–2020 averages on its 1 km grid, read at Westport’s population centre; the frosts, degree days and year-to-year swings are those of Newport, 14 km north, 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 Westport’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 Westport →
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).