Barry to Llantwit Major (Wales Coast Path) Walk

Glamorgan hourly weather (Open Meteo)

Sunset: 16:43. Dusk: 17:20. Dark: 18:02. Moon 58% (00:24 to dawn)

Updated: Mon, 20-Jan at 08:37

	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21
Today			🌫 0%	🌫 0%	2%	6%	8%	8%	7%	6%	6%	6%	6%	5%	4%	4%
Tue, 21 Jan	4%	3%	3%	2%	2%	2%	2%	1%	0%	0%	1%	3%	6%	11%	17%	22%
Wed, 22 Jan	20%	19%	19%	18%	16%	14%	12%	11%	11%	10%	9%	7%	6%	5%	5%	4%
Thu, 23 Jan	12%	23%	36%	49%	59%	68%	76%	83%	89%	90%	85%	76%	65%	51%	36%	25%
Fri, 24 Jan	90%	94%	96%	94%	89%	81%	73%	67%	61%	57%	55%	55%	55%	55%	56%	57%
Sat, 25 Jan	53%	53%	54%	55%	55%	54%	53%	53%	54%	53%	49%	43%	41%	47%	57%	63%
Sun, 26 Jan	47%	47%	48%	48%	49%	49%	49%	48%	46%	45%	44%	43%	43%	45%	48%	51%
Mon, 27 Jan	67%	67%	67%	67%	67%	67%	67%	68%	68%	69%	70%	71%	71%	71%	71%	70%
Tue, 28 Jan	57%	56%	56%	56%	56%	57%	57%	57%	58%	58%	58%	59%	59%	59%	58%	58%
Wed, 29 Jan	61%	61%	61%	60%	59%	58%	57%	57%	56%	56%	55%	55%	53%	50%	46%	42%
Thu, 30 Jan	25%	24%	22%	21%	20%	19%	18%	17%	16%	16%	16%	16%	16%	17%	18%	20%
Fri, 31 Jan	25%	26%	26%	27%	28%	29%	29%	29%	28%	27%	26%	26%	25%	25%	25%	25%
Sat, 01 Feb	16%	15%	14%	14%	14%	14%	14%	14%	15%	15%	15%	16%	16%	16%	17%	17%
Sun, 02 Feb	31%	31%	31%	30%	29%	28%	27%	26%	25%	24%	23%	22%	22%	22%	23%	24%
Mon, 03 Feb	20%	19%	19%	18%	17%	16%	16%	16%	16%	21%	19%	17%	16%	16%	16%	17%
Tue, 04 Feb	19%	18%	18%	17%	16%	16%	16%	18%	20%	22%	24%	25%	26%	25%	22%	20%

Percentages are the chance of rain.

Weather data by Open-Meteo

Glamorgan hourly weather (Met Office)

Sunset: 16:43. Dusk: 17:20. Dark: 18:02. Moon 58% (00:24 to dawn)

Updated: Tue, 21-Jan at 02:00

	06	09	12	15	18	21
Today	4%	5%	4%	5%	6%	7%
Wed, 22 Jan	10%	9%	6%	2%	3%	5%
Thu, 23 Jan	8%	74%	87%	38%	6%	8%
Fri, 24 Jan	96%	76%	44%	32%	11%	9%
Sat, 25 Jan	9%	11%	13%	15%	19%	13%
Sun, 26 Jan	9%	8%	14%	24%	58%	76%
Mon, 27 Jan	54%	41%	41%	43%	58%	21%

Percentages are the chance of rain.

Weather data by Met Office

Regional weather (Met Office)

Sunset: 16:43. Dusk: 17:20. Dark: 18:02. Moon 58% (00:24 to dawn)

Updated: Tue, 21-Jan at 02:38

Wales

Cloudy, cool and mainly settled with light winds.

• Dry in the south this evening, with occasional clear spells allowing some mist and fog patches to form by dawn
• Cloudier in the north with light rain and drizzle persisting in places
• Chilly with a frost developing in rural spots
• Minimum Temperature 0C

Tuesday:

• Early morning mist and fog lift to give a settled day
• Brighter in the afternoon with some sunny spells, though remaining cloudy with patchy rain and drizzle in the north
• Maximum Temperature 6C

Outlook for Wednesday to Friday:

• Showery rain is possible in places on Wednesday and feeling chilly with perhaps frost and fog overnight
• Turning increasingly unsettled from Thursday with gales and heavy rain likely by Friday

UK Day 6-7 and week 2

• This looks like being and unsettled and disturbed period of weather across much of the country, but especially for northern and western parts, with southern and eastern areas probably missing the worst of the conditions a lot of the time
• Over the weekend, after Friday's deep low and associated stormy weather, another system looks likely to move towards the UK from the Atlantic, driven in by the strong jet stream
• There is the potential for further weather warnings or even a named storm at some point
• Temperatures overall, are likely to end up being around normal or slightly above average, though given the strength of wind at times, it probably won't feel especially mild, especially when it's raining too

UK Week 3 and 4

• Generally mild at first, with periods of rain, showers and strong winds, alternating with short-lived brighter and cooler interludes, but with time these should become increasingly confined to northern parts
• Pressure may build across southern areas, which would result in longer drier and more-settled spells here, albeit with an increased chance of overnight fog and frost with temperatures falling correspondingly

Weather data by Met Office

Glamorgan Air Quality (Pollen and UV)

Updated: Tue, 21-Jan at 02:37

Key : Low Medium High Very High

Pollens

These pollens are shown (in season):

• Grass
• Alder and birch (trees)
• Mugwort and Ragweed (weeds)

When out walking, wraparound glasses, a disposable or washable facemask, and being at the front of the group, all help.

Other forecasts: Met Office, University of Worcester

UV and Air Quality

The UV forecast takes account of cloud cover.

"Air Q", the European Air Quality index, is a mix of dust/particulates, ozone, sulphur and nitrous oxides

Data

Weather data by Open-Meteo and CAMS ENSEMBLE

Glamorgan Visibility

Updated: Mon, 20-Jan at 08:37

Visibility in km. Above 50km is 'good'. Humidity and air pollution make it worse. Theoretical maximum is 300km/200 miles in clean dry polar air.

On the South Downs, at ~ 170m/500ft, the horizon is is ~ 45km/30 miles away. On a mountain at 1,000m/3,000ft, it is ~ 160km/100 miles away. Formula: horizon in km = √ (13 x altitude in m)

Weather data by Open-Meteo

Glamorgan daylight

Notes

• Max Height (solar noon) is when the sun is highest in the sky.
• Day length is dawn to dusk as there is enough light for walking for at least 30 minutes before sunrise and after sunset, even on an overcast day.
• At 'Light' (nautical dawn) the horizon becomes visible. At 'Dawn' (civil dawn) there is enough light to read, and drivers can switch their lights off. Finally the sun rises.
• After sunset, there is still enough light to read until 'Dusk' (civil dusk) or lighting up time for drivers. The horizon is still visible until 'Dark' (nautical dusk).
• Times will vary if there is a hill on the horizon.

Glamorgan moonlight

Moonlight chart for walking at night.

Notes

• The percentage of the moon which is illuminated doesn't vary much with location.
• A full moon is not just bigger, it is much brighter. A quarter moon (1/2 disk visible) give less than 5% of the illumination of a full moon. You can walk with a quarter moon if its high in the sky (after dusk for a growing moon, before dawn for a shrinking moon).
• Sky glow (light reflected by air or clouds) from nearby cities, and especially snow on the ground also effect light levels.
• Times will vary a few minutes, as (i) these figures are for the centre of the county the walk is in, (ii) if there are hills on the horizon, and (iii) if you are on a hill
• Sunlight is ~ 1,000,000 times brighter than moonlight.
• Of course, you need a cloudless night as well!

Glamorgan weather (Accuweather)