Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January stands out as Porthmadog's coldest month, with temperatures ranging between an average high of 5.6°C (42.1°F) and a low of 1.9°C (35.4°F).Humidity
The months with the highest humidity in Porthmadog, United Kingdom, are January and December, with an average relative humidity of 91%.Rainfall
In Porthmadog, in January, it is raining for 18.7 days, with typically 79mm (3.11") of accumulated precipitation. Throughout the year, in Porthmadog, there are 230 rainfall days, and 940mm (37.01") of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. The month with the most snowfall is January, when snow falls for 6.1 days and typically aggregates up to 70mm (2.76") of snow.Sea temperature
In Porthmadog, in January, the average water temperature is 8.8°C (47.8°F).Note: Dipping in 8.8°C (47.8°F) at temperatures less than 10°C (50°F) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In January, the average length of the day is 8h and 14min.On the first day of the month, sunrise is at 8:29 am and sunset at 4:10 pm. On the last day of January, sunrise is at 8:01 am and sunset at 4:58 pm GMT.
Sunshine
In Porthmadog, the average sunshine in January is 2.8h.UV index
January through April, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: In January, the maximum UV index of 2 suggests this advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
What time of the year is the coldest in Porthmadog?
How cold does it get in Porthmadog in January?
What is the most humid month in Porthmadog?
What is the average humidity in January in Porthmadog?
How many days does it rain in January in Porthmadog?
When does it snow the most in Porthmadog?
How many days does it snow in January in Porthmadog?
What is the sea water temperature in January in Porthmadog?
How many hours of daylight does Porthmadog have in January?
When is the sunrise / sunset in January in Porthmadog?
How long on average sun shines in January in Porthmadog?
What are the months with the lowest UV index in Porthmadog?
What is the UV index intensity in January in Porthmadog?
Average temperature in January
Porthmadog, United Kingdom
- Average high temperature in January: 5.6°C
The warmest month (with the highest average high temperature) is July (17.2°C).
The month with the lowest average high temperature is January (5.6°C).
- Average low temperature in January: 1.9°C
The month with the highest average low temperature is August (10.6°C).
The coldest month (with the lowest average low temperature) is February (1.5°C).
Average pressure in January
Porthmadog, United Kingdom
- Average pressure in January: 1012.6mbar
The month with the highest atmospheric pressure is May (1016.3mbar).
The month with the lowest atmospheric pressure is November (1009.1mbar).
Average wind speed in January
Porthmadog, United Kingdom
- Average wind speed in January: 16.8km/h
The windiest month (with the highest average wind speed) is December (17.8km/h).
The calmest month (with the lowest average wind speed) is June (11.2km/h).
Average humidity in January
Porthmadog, United Kingdom
- Average humidity in January: 91%
The months with the highest relative humidity are January and December (91%).
The months with the lowest relative humidity are April and May (84%).
Average rainfall in January
Porthmadog, United Kingdom
- Average rainfall in January: 79mm
The wettest month (with the highest rainfall) is December (103mm).
The driest months (with the least rainfall) are April and May (52mm).
Average rainfall days in January
Porthmadog, United Kingdom
- Average rainfall days in January: 18.7 days
The month with the highest number of rainy days is August (22.4 days).
The month with the least rainy days is February (15.3 days).
Average snowfall in January
Porthmadog, United Kingdom
- Average snowfall in January: 70mm
The month with the highest snowfall is January (70mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in January
Porthmadog, United Kingdom
- Average snowfall days in January: 6.1 days
The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in January
Porthmadog, United Kingdom
- Average sea temperature in January: 8.8°C
The best month for swimming (with the highest average sea temperature) is September (15.7°C).
The coldest months (with the lowest average sea temperature) are February and March (8.3°C).
Average daylight in January /
Average sunshine in January
Porthmadog, United Kingdom
- Average daylight in January: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in January: 2h and 5min
The months with the most sunshine are May and June (Average sunshine: 6h and 12min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in January
Porthmadog, United Kingdom
- Average sunshine days in January: 7 days
The month with the most sunshine days is March (10.8 days).
The month with the least sunshine days is August (5.9 days).
Average UV index in January
Porthmadog, United Kingdom
- Average UV index in January: 2
The months with the highest UV index are May, June and August (UV index 4).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).
Average cloud cover in January
Porthmadog, United Kingdom
- Average cloud cover in January: 74
The month with the most cloud cover is December (Cloud cover 76).
The month with the least cloud cover is April (Cloud cover 60).
Average visibility in January
Porthmadog, United Kingdom
- Average visibility in January: 8km
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (8km).
The months with the lowest visibility are August and September (7km).
Porthmadog, United Kingdom
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