Grasmoor weather tomorrow, this weekend and 14-day summit forecast
852 m · Cumbria
Grasmoor is the highest fell in the north-western Lakes, a massive block of a mountain rising above Crummock Water with a broad summit plateau.
Grasmoor today (updated 22:15, 18 Oct): up to 8°C at the summit, feeling as cold as -2°C, summit wind 36 mph gusting 45 mph, 51% chance of rain. A marginal day for the hills.
Grasmoor weather today, tomorrow and this weekend
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Marginal Today Monday 19 October
Light drizzle, up to 8°C at the summit, feeling as cold as -2°C, summit wind 36 mph gusting 45 mph, 51% chance of rain. Rated Marginal. Sunrise 07:49, sunset 18:06.
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Marginal Tomorrow Tuesday 20 October
Slight rain, up to 6°C at the summit, feeling as cold as 2°C, summit wind 26 mph gusting 33 mph, 86% chance of rain. Rated Marginal. Sunrise 07:51, sunset 18:03.
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Poor Saturday 24 October
Slight rain, up to 7°C at the summit, feeling as cold as -5°C, summit wind 47 mph gusting 59 mph, 69% chance of rain. Rated Poor. Sunrise 07:59, sunset 17:54.
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Poor Sunday 25 October
Slight rain, up to 11°C at the summit, feeling as cold as -2°C, summit wind 53 mph gusting 66 mph, 88% chance of rain. Rated Poor. Sunrise 07:01, sunset 16:52.
Best day of the next seven: Monday 19 October, with summit gusts around 45 mph and a 51% chance of rain. Peakify picks it as the day with the lightest gusts, after a penalty for any chance of rain over 40%.
Grasmoor 14-day summit weather forecast
Every day the cache holds from today, at summit height. Temperatures in °C, wind and gusts in mph, rain as the day's highest chance. Days 8 to 14 are marked less certain: forecasts lose skill quickly beyond a week, so read them as a trend.
| Day | Verdict | Weather | High / low | Feels like | Wind / gust | Rain | Snow |
|---|---|---|---|---|---|---|---|
| Today | Marginal | Light drizzle | 8° / 3° | -2° | 36 / 45 mph | 51% | — |
| Tomorrow | Marginal | Slight rain | 6° / 5° | 2° | 26 / 33 mph | 86% | — |
| Wed 21 Oct | Marginal | Moderate drizzle | 5° / -3° | -6° | 27 / 34 mph | 83% | — |
| Thu 22 Oct | Marginal | A dusting of snow | 5° / -3° | -6° | 34 / 43 mph | 67% | 0.8 cm |
| Fri 23 Oct | Poor | Slight rain | 7° / 1° | -5° | 49 / 61 mph | 88% | — |
| Sat 24 Oct | Poor | Slight rain | 7° / 2° | -5° | 47 / 59 mph | 69% | — |
| Sun 25 Oct | Poor | Slight rain | 11° / 4° | -2° | 53 / 66 mph | 88% | — |
| Days 8 to 13: less certain | |||||||
| Mon 26 Oct | Poor (less certain) | Dense drizzle | 9° / 4° | -1° | 52 / 65 mph | 84% | — |
| Tue 27 Oct | Poor (less certain) | Slight rain showers | 6° / 2° | -3° | 48 / 59 mph | 81% | — |
| Wed 28 Oct | Poor (less certain) | Dense drizzle | 6° / 2° | -4° | 48 / 60 mph | 78% | — |
| Thu 29 Oct | Poor (less certain) | Dense drizzle | 7° / 4° | -1° | 48 / 60 mph | 60% | — |
| Fri 30 Oct | Poor (less certain) | Slight rain showers | 6° / 2° | -3° | 55+ / 69+ mph | 55% | — |
| Sat 31 Oct | Poor (less certain) | Slight rain showers | 5° / 2° | -3° | 46 / 58 mph | 59% | — |
The cached forecast has no freezing level; snow is the model's summit snowfall for the day.
How the Grasmoor summit forecast is made
The numbers come from the Open-Meteo weather model for the summit's position at 852 m, in the mountain's local time. A valley forecast would understate the summit badly, so the wind is worked out at summit height from the model's upper-air winds: the standard 10 m wind sits over the model's smoothed ground and is roughly half what an exposed top gets.
Peakify rates each day Good, Marginal or Poor from the forecast summit wind, gusts, chance of rain and wind chill. Wind of 40 mph or gusts of 65 mph make it Poor; wind of 25 mph, gusts of 45 mph, a 60% chance of rain or a feels-like temperature of -8°C or below make it Marginal. The verdict is the same one shown on the main peak page and in the Peakify app.
"Feels like" is the coldest apparent temperature of the day, which combines air temperature, wind and humidity. On a windy summit it can be well below the air temperature, so pack for that figure, not the high.
For a second opinion before a big day, read the Met Office mountain forecast or MWIS for the area. They are written by forecasters and cover hazards such as cloud on the tops and visibility that a model table can't.
Questions about Grasmoor
What is the Grasmoor weather tomorrow?
Tuesday 20 October: slight rain, up to 6°C at the summit, feeling as cold as 2°C, summit wind 26 mph gusting 33 mph, 86% chance of rain. Rated Marginal.
What is the Grasmoor weather this weekend?
Saturday 24 October: slight rain, up to 7°C at the summit, feeling as cold as -5°C, summit wind 47 mph gusting 59 mph, 69% chance of rain. Rated Poor. Sunday 25 October: slight rain, up to 11°C at the summit, feeling as cold as -2°C, summit wind 53 mph gusting 66 mph, 88% chance of rain. Rated Poor.
Is there a 14-day Grasmoor weather forecast?
Yes. This page lists up to 14 days of summit weather for Grasmoor, each with a Good, Marginal or Poor verdict. Days 8 to 14 are less certain: use them to spot a settled or stormy spell, not to plan a day.
Where does the Grasmoor summit forecast come from?
From the Open-Meteo weather model for the summit's position at 852 m, refreshed every few hours. Wind is worked out at summit height from the model's upper-air winds, because the standard 10 m wind is roughly half what a summit gets.