76% chance of a view, in and out of it all day.
Cloud base sits about 102 m above the summit, so the top should stay under a ceiling rather than in it.
Forecast for Friday 16 October, built 2026-10-16 16:22 UTC and rebuilt twice a day. A high number is close to reliable, a low one is barely better than a shrug: how reliable is this?
Fri 16 Oct
76%
in and out of it all day
Sat 17 Oct
94%
clear of the cloud
Sun 18 Oct
94%
clear of the cloud
The hill
- Lists
- Hewitt, Nuttall, Marilyn
- Height
- 710 m (209 m of drop)
- Area
- Moel Hebog
- County
- Gwynedd, Wales
- Grid ref
- SH544516
- OS Landranger
- 115
- Summit
- no feature: grass
Sun
- Sunrise
- 06:45 ESE
- Sunset
- 17:19 WSW
- Daylight
- 10.57 hours
About Trum y Ddysgl
Trum y Ddysgl is a mountain in Snowdonia, North Wales and is the second highest summit on the Nantlle Ridge. It is also one half of the two Marilyns that make up the ridge, the other being Craig Cwm Silyn.
From Wikipedia, CC BY-SA 4.0
Hour by hour, Friday 16 October
| Hour | View | Cloud base | Temp | Wind |
|---|---|---|---|---|
| 06:00 | 49% | 492 m | 5.0° | 18 WNW |
| 08:00 | 56% | 619 m | 4.6° | 21 NW |
| 10:00 | 65% | 679 m | 5.0° | 23 NW |
| 12:00 | 74% | 812 m | 4.9° | 24 NW |
| 14:00 | 84% | 1,061 m | 5.3° | 23 NW |
| 16:00 | 94% | none | 5.6° | 23 NW |
| 18:00 | 89% | 746 m | 5.5° | 25 NNW |
| 20:00 | 79% | 881 m | 5.9° | 30 N |
Nearby
Mynydd Drws-y-coed · Mynydd Tal-y-mignedd · Craig Cwm Silyn · Mynydd Mawr · Moel Lefn · Moel yr Ogof
All Snowdonia hills for Friday 16 October · The week ahead · How to read this