Bloomsday (Dublin): what was the weather like at past editions?

At 12 of 33 editions of Bloomsday (Dublin) from 1991 to 2025 (36%), at least one festival day had rain (≥ 1 mm); a day of 30 °C or more came at 0 of 33 editions. Source: ERA5 reanalysis (Copernicus), data to 2025.

Data updated: 2 November 2026 · Sources, licences and data

Calculated 3 November 2026 · weather: ERA5 1991–2025 · edition dates checked 2 November 2026

12 / 33editions with at least one rainy day

36%of festival days rainy

0 / 33editions with a day ≥ 30 °C

8 °C (1997)coldest night

0 mmmedian rain per edition

Climate, not a forecast: these are statistics of past weather, not a forecast for the next edition.

Climate of the usual dates

If the next edition falls on its usual dates (16 June), the weather on those calendar days in 1991–2025 gives these odds:

37% — chance of at least one rainy day
37% — share of rainy days
18 °C — average daily maximum
0% — chance of a day of 30 °C or more
9% — chance of a night below 8 °C

Average daily maximum on these dates: 18.0 °C in 1991–2005, 18.0 °C in 2011–2025.

Weather at past editions

editions with at least one rainy day · Rain, mm

Year	Dates	Rainy days	Rain	Max	Night min
2025	16 June	0	0 mm	22 °C	12 °C
2024	16 June	0	0 mm	17 °C	8 °C
2023	16 June	1	3 mm	21 °C	13 °C
2022	16 June	0	0 mm	21 °C	12 °C
2019	16 June	1	5 mm	16 °C	9 °C
2018	16 June	1	4 mm	17 °C	12 °C
2017	16 June	0	0 mm	21 °C	13 °C
2016	16 June	1	6 mm	15 °C	12 °C
2015	16 June	0	0 mm	20 °C	14 °C
2014	16 June	0	0 mm	19 °C	12 °C
2013	16 June	1	4 mm	15 °C	11 °C
2012	16 June	1	5 mm	15 °C	12 °C
2011	16 June	1	4 mm	15 °C	10 °C
2010	16 June	0	0 mm	19 °C	11 °C
2009	16 June	0	0 mm	20 °C	10 °C
2008	16 June	0	0 mm	15 °C	8 °C
2007	16 June	0	1 mm	14 °C	11 °C
2006	16 June	1	4 mm	19 °C	14 °C
2005	16 June	1	5 mm	22 °C	13 °C
2004	16 June	0	0 mm	23 °C	14 °C
2003	16 June	0	0 mm	20 °C	12 °C
2002	16 June	0	0 mm	15 °C	13 °C
2001	16 June	1	1 mm	13 °C	11 °C
2000	16 June	0	0 mm	20 °C	12 °C
1999	16 June	0	0 mm	19 °C	12 °C
1998	16 June	0	0 mm	17 °C	8 °C
1997	16 June	0	0 mm	16 °C	8 °C
1996	16 June	0	0 mm	23 °C	12 °C
1995	16 June	1	2 mm	14 °C	11 °C
1994	16 June	0	0 mm	20 °C	11 °C
1993	16 June	0	1 mm	18 °C	13 °C
1992	16 June	0	0 mm	17 °C	12 °C
1991	16 June	1	4 mm	14 °C	9 °C

How to read these numbers

ERA5 is a reanalysis on a 0.25° grid (about 25 km): it counts slightly more light-rain days than nearby weather stations (by about 5–7 percentage points) and gives daytime highs about 1–2.5 °C below station readings, so real hot days were hotter than shown here.
Edition window: the official programme days (main festival days, without camping or warm-up days before the start).
Dates of past editions follow the rule described in Wikipedia (en: Bloomsday): “observed annually in Dublin and elsewhere on 16 June”. We applied it to 1991–2025, leaving out 2020–21 (cancelled or held differently).

Dates and sources

Coordinates: 53.350, -6.260; ERA5 cell centred at 53.25, -6.25 (average ground height of the cell 159 m).

Bloomsday (Dublin): what was the weather like at past editions?

Climate of the usual dates

Weather at past editions

How to read these numbers

Dates and sources

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