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Weather in Slieve Donard today: the honest forecast

Slieve Donard

Brass monkeys out there, so it is.

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1°C

Clear Clear sky

Feels like
1°C
Wind
2 km/h
Humidity
89%
Rainfall
0 mm

Sunrise 07:56 Sunset 18:20

Air quality Good

Updated 01:33 on 18/10/2026. Don’t be expecting miracles.

Tomorrow in Slieve Donard

Monday 19/10/2026

Ireland’s weather: the only thing that never takes a day off.

Rain, high of 9°C, low of 0°C. 0.8 mm of rain, 31% chance. Wind up to 17 km/h.

The day after in Slieve Donard

Tuesday 20/10/2026

Lashin’ outta the heavens.

Rain, high of 8°C, low of 6°C. 1.3 mm of rain, 81% chance. Wind up to 18 km/h.

Honest Weather’s verdicts for Slieve Donard, tomorrow

  • The view5/10 for the viewA glimpse here and there, if you’re lucky.
  • Wind up top8/10 for wind up topA light breeze on the summit. Pleasant enough.
  • The climb8/10 for the climbA decent day on the hill. Off you go.

Verdicts by Honest Weather · honestweather.ie

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Next 24 hours in Slieve Donard

Leaves everywhere and a nip in the air. Autumn’s here, God help us.

In 3-hour steps.

  1. 04:00 1° 0% chance of rain
  2. 07:00 0° 0% chance of rain
  3. 10:00 5° 0% chance of rain
  4. 13:00 9° 0% chance of rain
  5. 16:00 9° 0% chance of rain
  6. 19:00 5° 0% chance of rain
  7. 22:00 3° 0% chance of rain
  8. 01:00 1° 0% chance of rain

The days ahead in Slieve Donard

  1. Mon 19/10 Rain 9° / 0° 0.8 mm, 31% Drizzle so fine ya don’t notice till you’re drowned.
  2. Tue 20/10 Rain 8° / 6° 1.3 mm, 81% Rain so cheeky it should be arrested.
  3. Wed 21/10 Rain 6° / 3° 1.8 mm, 100% It’s not raining, it’s just the sky tellin’ ya off.
  4. Thu 22/10 Rain 7° / 2° 0.1 mm, 54% It’s Ireland. Lower your expectations.

About the weather in Slieve Donard

The highest mountain in Northern Ireland, in the Mournes. It is in County Down. Weather on a mountain can be very different from the weather in the valley: it is colder, windier and the cloud can sit on top all day. Always check the forecast and tell someone where you are going.

Slieve Donard is in County Down, at about 54.18°N, 5.92°W. The closest places we cover are Newcastle (4 km), Kilkeel (14 km), Downpatrick (21 km).

Across Ireland, spring is cool and bright with showers, summer highs are typically in the high teens with long evenings, autumn is the wettest and windiest stretch as the Atlantic fronts return, and winter is mild for the latitude with frost on clear nights. Rain can arrive in any month.

Quick answers for Slieve Donard

What is the weather in Slieve Donard right now?
It is 1°C in Slieve Donard with clear sky, feeling like 1°C, with wind at 2 km/h.
Will it rain in Slieve Donard tomorrow?
Rain is a small chance tomorrow in Slieve Donard (a 31% chance, around 0.8 mm).
What will the temperature be in Slieve Donard tomorrow?
A high of 9°C and a low of 0°C, with wind around 17 km/h.
What time is sunset in Slieve Donard today?
Sunrise is at 07:56 and sunset at 18:20.

Weather nearby

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All weather in County Down