Tattenham Corner Circular Walk

Surrey hourly weather (Open Meteo)

Sunset: 17:50. Dusk: 18:23. Dark: 19:01. Moon 42% (dusk to 02:00)

Updated: Mon, 20-Jan at 08:36

	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21
Today			0%	0%	0%	0%	3%	3%	0%	0%	0%	0%	0%	0%	0%	0%
Tue, 21 Jan	🌫 0%	🌫 0%	🌫 0%	🌫 0%	🌫 0%	🌫 0%	0%	0%	0%	0%	0%	0%	0%	0%	3%	🌫 5%
Wed, 22 Jan	🌫 20%	28%	🌫 38%	🌫 43%	🌫 39%	31%	25%	24%	25%	25%	24%	22%	20%	19%	17%	15%
Thu, 23 Jan	3%	3%	3%	4%	5%	6%	8%	11%	16%	22%	27%	31%	33%	33%	30%	26%
Fri, 24 Jan	30%	35%	41%	47%	54%	58%	60%	58%	54%	48%	42%	36%	33%	32%	33%	35%
Sat, 25 Jan	51%	53%	54%	56%	57%	58%	58%	58%	57%	55%	54%	52%	50%	48%	46%	44%
Sun, 26 Jan	26%	23%	22%	20%	19%	18%	18%	18%	19%	20%	21%	23%	25%	27%	29%	32%
Mon, 27 Jan	53%	55%	58%	60%	62%	64%	65%	49%	44%	39%	36%	34%	32%	30%	27%	26%
Tue, 28 Jan	35%	36%	36%	35%	32%	28%	26%	28%	33%	35%	34%	30%	26%	21%	14%	10%
Wed, 29 Jan	29%	27%	24%	23%	23%	24%	26%	28%	30%	32%	33%	33%	32%	28%	23%	19%
Thu, 30 Jan	19%	19%	20%	20%	21%	22%	23%	25%	26%	28%	30%	31%	32%	31%	30%	28%
Fri, 31 Jan	19%	19%	20%	21%	22%	23%	23%	22%	20%	18%	16%	14%	13%	12%	11%	11%
Sat, 01 Feb	13%	14%	16%	17%	18%	19%	19%	19%	18%	17%	16%	14%	13%	11%	10%	8%
Sun, 02 Feb	0%	0%	1%	2%	3%	5%	6%	7%	9%	10%	11%	12%	13%	13%	13%	12%
Mon, 03 Feb	13%	14%	14%	15%	15%	16%	16%	16%	16%	16%	16%	16%	16%	16%	15%	15%
Tue, 04 Feb	13%	13%	13%	13%	13%	13%	13%	13%	14%	14%	15%	15%	16%	17%	17%	18%

Percentages are the chance of rain.

Weather data by Open-Meteo

Surrey hourly weather (Met Office)

Sunset: 17:50. Dusk: 18:23. Dark: 19:01. Moon 42% (dusk to 02:00)

Updated: Thu, 06-Mar at 02:00

	06	09	12	15	18	21
Today	0%	0%	0%	4%	4%	5%
Fri, 07 Mar	19%	48%	9%	13%	10%	3%
Sat, 08 Mar	1%	3%	3%	4%	4%	4%
Sun, 09 Mar	3%	1%	4%	6%	9%	8%
Mon, 10 Mar	8%	10%	10%	11%	9%	9%
Tue, 11 Mar	10%	9%	10%	10%	9%	4%
Wed, 12 Mar	4%	5%	10%	11%	10%	9%

Percentages are the chance of rain.

Weather data by Met Office

Regional weather (Met Office)

Sunset: 17:50. Dusk: 18:23. Dark: 19:01. Moon 42% (dusk to 02:00)

Updated: Thu, 06-Mar at 02:38

South East England

Clear skies with a risk of mist and fog patches.

• Clear skies overnight with gentle winds
• Isolated mist and fog patches are possible, especially in the south of the region
• Rural frost is possible in sheltered, prone locations
• Minimum Temperature 2C

Thursday:

• A fine start to the day with plenty of sunshine, cloud increasing from the west during the afternoon with outbreaks of rain arriving overnight
• Often breezy, with temperatures above average
• Maximum Temperature 15C

Outlook for Friday to Sunday:

• Cloudy with outbreaks of rain Friday, light winds
• Hazy sunshine on the weekend with perhaps some low cloud moving inland from the coast on Sunday
• Temperatures around or above average

UK Day 6-7 and week 2

• Cloudy with outbreaks of rain in places on Monday, the rain easing and clearing southwards during the course of the day
• Clearer weather with sunny spells and a few coastal showers will follow from the north
• These clearer conditions will become established across the whole of the UK by Tuesday as high pressure builds from the northwest
• This will lead to fine and dry conditions for many through the rest of next week, although a few showers are likely along coasts
• Temperatures will likely be below normal
• Through the following weekend and into the week after, conditions may slowly become milder and more changeable with some unsettled spells bringing periods of rain and strong winds

UK Week 3 and 4

• Confidence is low, but through the remainder of March changeable weather patterns are most likely
• This means periods of unsettled, wet and windy weather interspersed with some drier and brighter spells
• Into early April, there may be a transition to drier and more settled weather
• Temperatures will probably be above average overall

Weather data by Met Office

Surrey Air Quality (Pollen and UV)

Updated: Thu, 06-Mar at 02:36

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

Surrey Visibility

Updated: Mon, 20-Jan at 08:36

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

Surrey 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.

Surrey 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!

Surrey weather (Accuweather)