Ireland’s summers rarely make international headlines, but June 2025 turned heads across the country. Temperatures in parts of Roscommon hit 29.6°C on a single day mid-month, and Met Éireann’s official data confirms it was the fourth-warmest June recorded in over 126 years of observations. With global temperatures trending upward, that single data point raises a bigger question: what comes next?
June 2025 mean temperature: 4th warmest on record ·
Forecast anomaly: 0.2–1.0°C above average ·
Potential peak: up to 31°C in early July ·
Historical hot summer: 1976
Quick snapshot
- June 2025 ranked 4th warmest since 1900 (Met Éireann)
- Average temperature reached 15.1°C, 1.42°C above the 1991–2020 average (Farmers Journal)
- Mount Dillon, Co Roscommon, recorded 29.6°C on 20 June 2025 (Met Éireann)
- Whether June 2025 officially met Met Éireann’s heatwave threshold of five consecutive days above 25°C
- How 2026 summer temperatures will compare to 2025’s record warmth
- Exact regional breakdown of peak temperatures beyond Mount Dillon and western stations
- 2 June 2025: Gale-force winds at Mace Head and Belmullet
- 20 June 2025: Mount Dillon hits 29.6°C, year’s maximum to that date
- 12 June 2025: Mount Dillon peaks at 31.1°C for the year
- Summer 2025: Provisionally the warmest on record
- 2025 closed as Ireland’s second-warmest year on record at 11.14°C
- Met Éireann forecasts point to continued above-average temperatures into 2026
- Extended-range forecasts carry low skill beyond one week
The table below summarises the key verified data points from official and tier-2 sources used throughout this article.
| Fact | Value | Source |
|---|---|---|
| Warmest June rank (2025) | 4th on record since 1900 | Met Éireann |
| June 2025 average temperature | 15.1°C | Farmers Journal |
| Temperature anomaly vs 1991–2020 LTA | +1.42°C above average | Met Éireann |
| Peak temperature (June 2025) | 29.6°C at Mount Dillon on 20 June | Met Éireann |
| Rainfall vs LTA | 117% (24th wettest since 1941) | Met Éireann |
| Warmest June record (2023) | 16.22°C | Agriland |
| Summer 2025 average | 16.19°C (warmest on record) | Met Éireann |
| Previous warmest summer (1995) | 16.11°C | Met Éireann |
| 2025 annual ranking | 2nd warmest year on record | RTE |
| Heatwave definition | 5 consecutive days above 25°C | Irish Times |
What will the weather be like in June in Ireland?
Met Éireann’s monthly outlook for June 2025 predicted temperatures between 0.2°C and 1.0°C above the 1991–2020 long-term average, with warmer conditions expected to build through the month. The Irish Times reported that Met Éireann’s May–July forecast indicated conditions 0.5–1°C above normal — a signal that summer warmth was expected earlier than typical.
The actual results bore that out. All weather stations recorded mean temperatures above the 1991–2020 baseline in June 2025, with Mount Dillon in Co Roscommon reaching 29.6°C on 20 June — the year’s highest reading to that point, according to Met Éireann’s climate statement.
Extended range forecast details
Met Éireann’s extended range forecasts showed high pressure developing from 9–15 June 2025, bringing warmer and drier conditions, as reported by extra.ie. Long-range maps from various outlets suggested potential highs around 25°C by 10 June 2025, with some models hinting at peaks approaching 27°C in western counties like Connacht and West Ulster.
Extended range forecasts carry low skill beyond about a week, and Met Éireann itself has noted that predictions become “increasingly uncertain” the further ahead you look, according to the service’s official guidance.
Temperature trends
The June 2025 average of 15.1°C sits 1.88°C above the 1961–1991 baseline and 1.42°C above the 1991–2020 average — a measurable shift that fits a longer warming pattern. RTE reported that the last four years (2022–2025) rank among the warmest on record, with seven of the top ten warmest years occurring since 2005.
Regional variations
Not all of Ireland shared equally in June’s warmth. The west experienced below-average sunshine, with Mace Head and Belmullet recording gale-force winds on 2 June — the kind of Atlantic weather that often keeps coastal Ireland cooler than inland areas, as detailed in Farmers Journal’s analysis. Meanwhile, Mount Dillon in the Midlands recorded the month’s highest temperature.
Is there a heatwave coming to Ireland?
Met Éireann defines a heatwave as five consecutive days with temperatures above 25°C, a threshold that sounds modest compared to Mediterranean standards but represents a genuine anomaly for Ireland’s temperate climate, as Irish Times explained. The question of whether June 2025 crossed that line is less straightforward than it might seem.
Exact dates from Met Éireann
Met Éireann’s short-term forecasts highlighted the period from 9–15 June 2025 as the most likely window for sustained warmth. However, verifying whether five consecutive days above 25°C actually occurred requires station-by-station confirmation that Met Éireann’s official climate statement doesn’t explicitly state. What the data does confirm is that 20 June brought the month’s peak of 29.6°C at Mount Dillon — a single day, not a five-day stretch.
Peak temperature predictions
Some third-party forecasting outlets suggested highs of 27°C in western regions around 16 June, though these came from less authoritative sources. The most reliable peak recorded in June was Mount Dillon’s 29.6°C, with the year’s true maximum — 31.1°C — arriving on 12 July at the same station.
A single hot day does not a heatwave make. For those planning outdoor events, agriculture, or energy demand, the difference between “warm” and “heatwave” has practical consequences that extended forecasts can only partially predict.
High pressure influences
Met Éireann noted that Ireland sat on the cloudier northern edge of a European heat dome during late June 2025, as reported by Farmers Journal. That positioning kept maximum temperatures somewhat suppressed compared to continental Europe, where heat domes often drive more extreme readings. Ireland’s Atlantic exposure acts as a natural moderating force, even when high pressure dominates.
Will summer 2026 be hot in Ireland?
The honest answer from available data is that official Met Éireann forecasts for summer 2026 do not appear in the research record. What does exist is a longer-term trend: RTE reported that 2025 was Ireland’s second-warmest year on record at 11.14°C, and Met Éireann confirmed a marine heatwave off the west coast during April–May 2025 — conditions that tend to persist and influence subsequent seasons.
Met Office global predictions
The UK Met Office indicated that hotter conditions for May–July 2025 were roughly 2.3 times more likely than normal, a probability signal that suggests the underlying drivers — global ocean temperatures, atmospheric patterns — remain conducive to warmth. However, translating global probabilities into Ireland-specific summer forecasts remains beyond reliable skill levels for seasonal outlooks.
Ireland-specific outlook
Met Éireann’s annual climate statement for 2025 and its summer 2025 provisional data point to a country experiencing measurable warming. Summer 2025 averaged 16.19°C — the warmest on record since 1900 — beating the previous record of 16.11°C set in 1995. The trend is clear even if precise 2026 specifics remain elusive.
Comparison to 2025
Summer 2025 had fewer days exceeding 25°C than either 1995 or 1976, but it recorded higher minimum temperatures — a pattern suggesting warmer nights rather than more extreme daytime peaks. That nuance matters for public health planning, as warmer nights reduce the overnight recovery that typically helps the body cope with daytime heat.
The pattern: Irish summers are trending warmer, but the character of that warmth is shifting toward sustained mildness rather than the short, sharp heat bursts that defined earlier hot summers.
Was 1976 a hot summer in Ireland?
Yes — 1976 remains a reference point for Irish heatwaves, though its reputation partly reflects the relative scarcity of hot summers in living memory rather than absolute temperature records. According to Met Éireann data, the summer of 1976 had more days exceeding 25°C than 2025, but 2025’s minimum temperatures were higher, giving it the edge on average warmth.
Key events of 1976 summer
The summer of 1976 is remembered across these islands for its prolonged drought and sustained warmth. For Ireland specifically, it ranks alongside 1995 as one of the few summers that approached — but did not quite reach — the 16°C average threshold that 2025 shattered at 16.19°C.
Temperature records
The warmest June on record belongs to 2023 at 16.22°C; the coldest on record is 1972 at 12.68°C, as documented by Agriland. June 2025 sits fourth on that list — respectable, but not exceptional by recent standards, which itself tells a story about warming baselines.
Comparisons to recent Junes
June 2025’s 15.1°C average sits 0.12°C below June 2023’s record. However, when measured against the older 1961–1991 baseline, June 2025 was 1.88°C above average — a more dramatic shift that reflects how the “normal” itself is moving upward.
The trade-off: as averages rise, statistical records become harder to break, making the fact that 2025 still ranked fourth-warmest all the more notable. For those considering a move, you can find houses for sale in Killarney. houses for sale Killarney
Where is the best place to live in Ireland for weather?
This question surfaces regularly in Irish search behaviour, and the answer depends on which weather factor you prioritise. For pure warmth, inland areas like Roscommon tend to record the highest temperatures — Mount Dillon’s readings confirm that pattern. For sunshine hours, the southeast generally outperforms the west, where cloudier conditions and Atlantic weather systems prevail.
Sunniest regions
Met Éireann data shows June 2025 had below-average sunshine nationally, with the west experiencing the dullest conditions. The southeast and east coast typically see more sunshine and less rainfall, making counties like Wexford, Waterford, and east Cork attractive for those prioritising dry, bright weather.
Mildest climates
For mild winters with less extreme cold, coastal areas moderated by the Atlantic tend to stay warmer overnight. However, that same moderation keeps summer peaks lower than inland areas. The warmest summers in Ireland are consistently recorded inland, away from maritime influences.
Liveability factors
Weather is only one factor in liveability, and the research record contains no definitive “happiest place” or “safest town” ranking tied to climate data. For those balancing warmth, sunshine, and moderate year-round temperatures, the south and east coasts offer the most practical trade-off — warmer summers than the west, milder winters than the interior, and more sunshine than the Atlantic-influenced north and west.
Why this matters: for readers researching where to live, the data suggests that no single Irish region maximises all weather variables simultaneously, and trade-offs between summer heat, winter mildness, and sunshine hours are unavoidable.
Confirmed
- June 2025 was the fourth-hottest June on record in Ireland over 126 years
- Average temperature of 15.1°C, 1.42°C above the 1991–2020 long-term average
- Mount Dillon recorded 29.6°C on 20 June 2025, the year’s maximum to that point
- Summer 2025 was provisionally the warmest on record at 16.19°C
- 1976 was a genuinely hot summer, though 2025 exceeded its average warmth
Unclear
- Whether June 2025 officially met the five-day heatwave threshold
- Detailed regional temperature breakdowns beyond major stations
- Precise 2026 summer forecast specifics
- Whether 2025’s marine heatwave will influence 2026 conditions
“The final third of the month has been remarkably hot for Europe… Ireland stayed on the cloudier northern edge of the heat dome.”
— Met Éireann spokesperson, Farmers Journal
“Our criteria for a heatwave is five days in a row of above 25 degrees.”
— Andrew Doran-Sherlock, Met Éireann Forecaster, Irish Times
“The extended range forecast can at times provide an insight… however they have generally low skill because forecasts beyond one week become increasingly uncertain.”
— Met Éireann official statement, extra.ie
Met Éireann’s provisional data shows that summer 2025 is the warmest on record since 1900, with the warmest spring on record already recorded earlier in the year — a cascade of warmth that puts 2025 in a class of its own in the Irish climate record.
Related reading: Met Éireann heatwave ahead
June’s impressive peak of 29.6°C at Mount Dillon previewed the August 2025 extreme heat that Met Éireann tracked later that summer.
Frequently asked questions
What is the 21 day weather forecast for Ireland?
Met Éireann provides forecasts up to 7 days ahead with reasonable accuracy. Beyond that, extended range outlooks offer probability-based guidance for 10–30 days but carry significant uncertainty. The service’s own guidance acknowledges that forecasts beyond one week become “increasingly uncertain.”
What does the 30-day weather forecast say for Ireland?
Met Éireann’s monthly outlooks provide temperature and rainfall probabilities relative to average conditions rather than specific day-by-day predictions. These are useful for identifying trends (for example, “more likely warmer than average”) but should not be relied upon for planning specific outdoor activities.
What is the 15 day weather forecast from Met Éireann?
Met Éireann publishes detailed 7-day forecasts and provides an extended outlook beyond that. The 15-day window sits in the uncertain zone where forecast skill diminishes substantially — useful for general planning but not reliable for specific event scheduling.
What is Met Éireann’s 7 day farmers forecast?
Met Éireann offers specific agricultural forecasts for farmers, including soil temperature, grass growth projections, and rainfall predictions tailored to agricultural needs. These are among the most detailed products available and tend to be more accurate than general public forecasts due to their focus on specific variables.
How does June 2025 compare to past heatwaves?
June 2025 ranked fourth-warmest on record, behind June 2023 (warmest at 16.22°C), and ahead of most Junes since 1900. While it did not surpass June 2023’s absolute warmth, its positioning as the fourth-consecutive month with temperatures in the top 10 averages suggests a sustained warming pattern rather than a single anomalous spike.
What are the chances of snow in Ireland summer 2026?
Snow in Irish summers is extraordinarily rare anywhere in the country. While climate change has increased year-to-year variability, the physical conditions required for snowfall — temperatures at or below freezing at elevation — do not occur during Irish summers under any normal scenario.
Is 2026 forecast hotter than 2025 globally?
Global ocean temperatures and atmospheric indicators suggest continued warmth into 2026, but Ireland-specific seasonal forecasts with that level of granularity are not reliably available this far in advance. The trend points toward warmth, but precise temperature rankings for specific future months remain beyond current forecast skill.