July
Other strong months: August and June
67/100 weather score
Ireland · 1991–2020
Best time to visit
Dún Laoghaire
For Dún Laoghaire, July has the most comfortable weather in our climate comparison. Typical daytime highs are 20.1°C, nights average 11.5°C, and rainfall totals about 70 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.
Best all-round monthJuly
Typical daytime high20.1°C
Typical night-time low11.5°C
July rainfall70 mm
July
Other strong months: August and June
31/100 weather score
July
Other strong months: June and August
79/100 weather score
Make the answer personal
Choose the weather
that suits you.
Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.
3 months fit your choices for Dún Laoghaire
January has the lowest comfort score at 11 out of 100, compared with July at 67. The main reason is that days reach only 8.3°C, 16° below the 24°C the score treats as ideal.
Quick answers
Planning a trip to Dún Laoghaire?
These answers come from the same measured monthly climate record shown on this page.
When is the best time to visit Dún Laoghaire?
July is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 20.1°C and 70 mm of rain.
What is the hottest month in Dún Laoghaire?
July is hottest in this record, with a typical daytime high of 20.1°C and a night-time low of 11.5°C.
Which month has the least rain?
March has the lowest monthly rainfall total at 55 mm.
Is this a weather forecast?
No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.
Month by month
See how the weather
changes through the year.
The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 8.3°C | 2°C | 66 mm | 13.5 | 9.1°C | 8 h 02 | 11 | Strong coverage |
| February | 9.1°C | 2.1°C | 56 mm | 12.1 | 8.1°C | 9 h 43 | 16 | Strong coverage |
| March | 10.8°C | 3.1°C | 55 mm | 11.7 | 7.9°C | 11 h 40 | 24 | Strong coverage |
| April | 13.1°C | 4.5°C | 59 mm | 12.1 | 8.7°C | 13 h 53 | 33 | Strong coverage |
| May | 15.9°C | 6.9°C | 65 mm | 12.4 | 10.6°C | 15 h 50 | 46 | Strong coverage |
| June | 18.5°C | 9.5°C | 74 mm | 11.2 | 13.1°C | 16 h 57 | 59 | Strong coverage |
| July | 20.1°C | 11.5°C | 70 mm | 13.2 | 14.7°C | 16 h 30 | 67 | Strong coverage |
| August | 19.9°C | 11.2°C | 82 mm | 13.2 | 15.1°C | 14 h 47 | 64 | Strong coverage |
| September | 17.7°C | 9.4°C | 68 mm | 12.1 | 14.5°C | 12 h 36 | 56 | Strong coverage |
| October | 14.2°C | 6.9°C | 83 mm | 12.5 | 13.4°C | 10 h 28 | 38 | Strong coverage |
| November | 10.8°C | 4.2°C | 87 mm | 13.4 | 12.1°C | 8 h 32 | 20 | Strong coverage |
| December | 8.6°C | 2.6°C | 75 mm | 13.6 | 10.6°C | 7 h 32 | 12 | Strong coverage |
What has changed
Recent daytime highs are
1.0°C warmer in Dún Laoghaire.
Each bar shows the difference between the 2011–2025 average daytime high and the 1961–1990 average for the same month at the same station. A blank month does not have enough older observations for a reliable comparison.
Jan
+0.6
Feb
+1.6
Mar
+0.9
Apr
+1.0
May
+1.4
Jun
+0.9
Jul
+0.9
Aug
+0.8
Sep
+0.7
Oct
+0.5
Nov
+1.2
Dec
+1.2
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 17.0°C10 Jan 1971 | -13.4°C15 Jan 1982 | 49 mm4 Jan 1948 | 183 mm1948 · driest 8 mm in 1876 | 159 |
| February | 18.1°C23 Feb 1891 | -8.7°C1 Feb 1972 | 46 mm24 Feb 1933 | 142 mm2020 · driest 2 mm in 1891 | 159 |
| March | 23.4°C29 Mar 1965 | -8.3°C4 Mar 1962 | 38 mm18 Mar 1971 | 141 mm1947 · driest 7 mm in 1929 | 159 |
| April | 22.9°C11 Apr 1869 | -4.7°C10 Apr 1998 | 39 mm21 Apr 1872 | 136 mm1966 · driest 2 mm in 1938 | 159 |
| May | 26.7°C31 May 1922 | -3.0°C6 May 2012 | 45 mm28 May 1892 | 142 mm1993 · driest 7 mm in 1991 | 159 |
| June | 28.9°C6 Jun 1950 | -0.3°C1 Jun 1962 | 81 mm11 Jun 1993 | 183 mm1958 · driest 3 mm in 1889 | 159 |
| July | 33.5°C16 Jul 1876 | 1.7°C8 Jul 1913 | 55 mm24 Jul 1896 | 165 mm1936 · driest 8 mm in 1982 | 159 |
| August | 30.6°C2 Aug 1990 | 0.6°C12 Aug 1912 | 85 mm25 Aug 1986 | 185 mm1917 · driest 3 mm in 1995 | 157 |
| September | 28.7°C6 Sep 1868 | -0.1°C19 Sep 1986 | 69 mm3 Sep 1931 | 176 mm1976 · driest 1 mm in 1986 | 159 |
| October | 24.2°C3 Oct 1959 | -3.5°C16 Oct 1993 | 77 mm27 Oct 1880 | 210 mm1960 · driest 12 mm in 1951 | 159 |
| November | 19.4°C2 Nov 1927 | -8.4°C29 Nov 2010 | 76 mm5 Nov 2000 | 191 mm1965 · driest 4 mm in 1871 | 159 |
| December | 17.2°C2 Dec 1948 | -13.8°C31 Dec 1961 | 48 mm4 Dec 1947 | 231 mm1978 · driest 18 mm in 1885 | 159 |
| Month | Days 25°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|
| January | 0 | 8 | 1 |
| February | 0 | 8 | <1 |
| March | 0 | 6 | 1 |
| April | 0 | 3 | <1 |
| May | 0 | <1 | 1 |
| June | <1 | 0 | 2 |
| July | 1 | 0 | 1 |
| August | 1 | 0 | 2 |
| September | <1 | 0 | 2 |
| October | 0 | <1 | 2 |
| November | 0 | 3 | 2 |
| December | 0 | 7 | 2 |
| Month | Dry days reaching 20°C | Wet days | Days with heavy rain | Weeks with 3+ wet days | Typical high by year |
|---|---|---|---|---|---|
| January | 0% | 42% | 4% | 57% | 5.9–9.6°C |
| February | 0% | 39% | 4% | 53% | 6.3–10.4°C |
| March | <1% | 36% | 4% | 49% | 8.0–12.2°C |
| April | <1% | 36% | 3% | 48% | 10.7–14.3°C |
| May | 6% | 36% | 4% | 47% | 13.6–17.3°C |
| June | 22% | 35% | 4% | 46% | 16.7–19.9°C |
| July | 32% | 38% | 4% | 51% | 18.1–21.9°C |
| August | 29% | 40% | 6% | 53% | 17.8–21.1°C |
| September | 11% | 37% | 6% | 52% | 15.7–18.7°C |
| October | 1% | 40% | 6% | 57% | 12.1–15.5°C |
| November | 0% | 41% | 6% | 57% | 8.8–11.7°C |
| December | 0% | 43% | 6% | 61% | 6.6–10.3°C |
A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.
The evidence behind this page
Where these figures
come from.
- Place identity
- GeoNames 2964506
- NOAA station
- EI000003969 · DUBLIN PHOENIX PARK
- Station distance
- 14.4 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 26 usable years
- Daylight
- Calculated from latitude 53.29°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 9 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Dún Laoghaire is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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