Weather and climate in Dublin, Leinster, Ireland: monthly averages and best time for stargazing

Best for stargazingNov, Dec, JanMost clear, dark hours

Warmest monthJulyAverage high 18°C

Coolest monthFebruaryAverage low 4°C

Wettest monthNovember106 mm on average

What the weather is like in Dublin

The warmest month in Dublin is July, with average highs of 18°C. The coolest is February, when nights average 4°C. About 982 mm of rain and snow falls in a typical year, most in November and least in April.

Skies are clearest in April (73% average cloud cover) and cloudiest in January (78%). Combining cloud with the length of truly dark nights, November, December, January offer the most clear, dark hours for stargazing.

Clear, dark hours per night

2.6 Jan

2.4 Feb

2.1 Mar

1.5 Apr

0.0 May

0.0 Jun

0.0 Jul

0.9 Aug

1.9 Sep

2.5 Oct

3.0 Nov

2.9 Dec

Hours of full astronomical darkness in mid-month, multiplied by the average share of clear sky. A rough guide to how much good observing time a typical night offers.

Monthly averages

Month	High	Low	Precipitation	Cloud cover	Humidity	Wind	Dark hours
January	8°C	4°C	86 mm	78%	91%	20 km/h	11.7 h
February	8°C	4°C	70 mm	76%	90%	19 km/h	10.2 h
March	9°C	4°C	70 mm	74%	88%	17 km/h	8.2 h
April	11°C	6°C	61 mm	73%	86%	15 km/h	5.4 h
May	14°C	8°C	67 mm	73%	84%	14 km/h	0.0 h
June	16°C	11°C	76 mm	76%	84%	13 km/h	0.0 h
July	18°C	12°C	80 mm	78%	85%	12 km/h	0.0 h
August	18°C	12°C	91 mm	78%	86%	14 km/h	4.1 h
September	16°C	11°C	76 mm	74%	87%	15 km/h	7.3 h
October	13°C	9°C	102 mm	74%	88%	17 km/h	9.5 h
November	10°C	7°C	106 mm	73%	90%	19 km/h	11.3 h
December	8°C	5°C	97 mm	76%	91%	20 km/h	12.1 h

Climate averages: NASA POWER, 2001–2025, for the grid area around 53.50, -6.25 (about 50 km across). High and low temperatures are estimated from the monthly mean and the average daily range. Hills, coasts and cities can differ from the area average. Aurora outlook for Dublin · Sources and methods.