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Dublin weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Dublin?
For a warm holiday, the best week has been 14–20 July (Weather Index 69). Favourable start dates for a 7-day trip run from 10 July to 19 July. July and August are warmest (19°C), January and May are driest and May and June have the most sun.
- Warmest
- July and August 19°C
- Coolest
- January 8°C
- Driest
- January and May 38% rain-day chance
- Wettest
- February 49% rain-day chance
- Sunniest
- May and June 11 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Dublin
Dublin historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 8.4 | 4.2 | 37.7 | 11.7 | 63.1 | 4.3 |
| February | 9.3 | 4.7 | 48.9 | 13.7 | 65.4 | 5.6 |
| March | 10.4 | 5.0 | 46.8 | 14.5 | 72.3 | 7.6 |
| April | 12.2 | 6.2 | 42.3 | 12.7 | 67.7 | 9.6 |
| May | 15.6 | 9.1 | 38.4 | 11.9 | 62.0 | 11.5 |
| June | 17.9 | 11.8 | 47.3 | 14.2 | 73.9 | 11.3 |
| July | 19.4 | 13.5 | 46.1 | 14.3 | 79.6 | 10.3 |
| August | 19.1 | 13.4 | 42.9 | 13.3 | 74.0 | 9.8 |
| September | 17.2 | 11.4 | 47.0 | 14.1 | 91.4 | 8.3 |
| October | 14.2 | 9.5 | 43.5 | 13.5 | 84.2 | 6.4 |
| November | 10.8 | 6.5 | 44.0 | 13.2 | 81.2 | 4.6 |
| December | 9.4 | 5.4 | 43.9 | 13.6 | 80.8 | 3.6 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.