Snowdon walk

Met Office Forecast

Wales

Showery rain this evening. More persistent rain arriving overnight.

This Evening and Tonight:

A cloudy evening with outbreaks of showery rain affecting western areas. A band of more persistent rain, sometimes heavy, pushes into the west through the early hours. The rain will affect most areas by dawn. Minimum Temperature 10C.

Wednesday:

A wet start for most on Wednesday with further heavy rain for a time. The rain will clear eastwards by early afternoon leaving sunny spells and scattered showers. Feeling cooler. Maximum Temperature 16C.

Outlook for Thursday to Saturday:

Unsettled and windy on Thursday with widespread heavy showers and possible gales in exposed areas. Further showers on windward coasts on Friday. Dry and fine on Saturday. Feeling cool throughout.

Day 6-7 and Week 2:

A brief period of drier weather on Sunday, though it will be cool with a ground frost possible even in the south. Into the start of next week, it is set to return to an unsettled picture. Generally windy weather coupled with showers and occasional longer spells of rain. The heaviest rain most likely in the north and northwest, which may also see gales at times. Although in the east and southeast, there may still be brief interludes of drier and sunnier weather. Temperatures will generally be rather cool, potentially cooler in more persistent rainfall, and overnight frost may be seen in prone parts of the north as and when calmer spells of weather allow.

Week 3 and 4:

Further into October, conditions are likely to remain unsettled for most. The most unsettled conditions being in southern areas. Generally windy with a chance of gales however the risk of gales reduces later in the period. Feeling cool throughout with a risk of overnight frost. Lighter winds means that morning fog patches may also become more prevalent towards mid-month.

Met Office : Wales : 2020-09-22T13:48:28

Daylight : Snowdonia NP

Day length is dusk to dawn. Times will vary a little if there is a hill on the horizon.

It should still be light enough to read at dawn and dusk, so there will be enough light for walking even earlier (later).

Moonlight : Snowdonia NP

Notes

• The moon's phase or fracillum (percentage of the moon illuminated) doesn't vary much with location.
• A full moon is not just bigger, its much brighter. A half moon ('50%') give less than 5% of the illumination of a full moon. You can walk with a half 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
• Of course, you need a cloudless night as well!

Met Office Mountain Forecast

Issued: 1800 on 2020-09-22 for Snowdonia

Data: Met Office