Snowdonia weather and climate in 2025
January
February
March
April
May
June
July
August
September
October
November
December
Overview
May
< April
Overview
June >
Snowdonia weather and climate in 2025
January
February
March
April
May
June
July
August
September
October
November
December
Overview
May
< April
Overview
June >
Day
12 °C
Night
5 °C
Sea
11 °C
Precipitation
103 mm
in month
Rainy days
12 days
in month
Daylight
16 hours
average
Sunshine
6 hours
average
Humidity
82 %
Day
12 °C
Night
5 °C
Sea
11 °C
Precipitation
103 mm
in month
Rainy days
12 days
in month
Daylight
16 hours
average
Sunshine
6 hours
average
Humidity
82 %
Overview: Snowdonia
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We make the most from 40 years of historical weather data to predict the best weather conditions.Weather overview for Snowdonia
Weather overview
Snowdonia (United Kingdom) in general has a cold climate. Temperatures during the day are in the range from 5 °C (41 °F) in January to 16 °C (61 °F) in July. The driest month is June with just 12 days of rain, on the contrary, the month when it rains the most is November with 18 days of rain. The highest night temperatures could be experienced in August with 9 °C (49 °F), the lowest in February with 0 °C (32 °F).
January weather
The minimum of the day temperature can be noticed, with its value being 5 °C (41 °F) in Snowdonia. The beginning of the descent of the number of rainy days could be noticed, with its value of 16 days, while the rainfall amount continues to descent, with its value of 163 mm (6.41 in). The maximum of the wind speed can be noticed in January.
February weather
The night temperature reaches its minimum, with its value being 0 °C (32 °F) in Snowdonia. The descent of the rainfall amount can be observed, the value of this measure is 118 mm (4.64 in), and the descent of the number of rainy days can be observed as well, its value is 15 days. The number of sun hours (without clouds) rise's start could be observed, its value is 2 hours.
March weather
The day temperature starts to rise, the value of this measure is 7 °C (44 °F) in Snowdonia, and the beginning of the rise of the night temperature could be noticed too. The beginning of the rise of the rainfall amount could be noticed, with its value of 142 mm (5.59 in), while the descent of the number of rainy days can be observed, the value of this measure is 14 days. The number of sun hours (without clouds) rises similarly to the previous month, with its value being 3 hours.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.April weather
The day temperature rises similarly to the previous month, the value of this measure is 10 °C (49 °F) in Snowdonia, and the rise of the night temperature can be observed as well, the value of this measure is 2 °C (36 °F). The number of rainy days continues to descent, while the rainfall amount descent's start could be observed, the value of this measure is 109 mm (4.28 in). The rise of the number of sun hours (without clouds) can be observed, the value of this measure is 5 hours.
May weather
The day temperature continues to rise, with its value being 12 °C (54 °F) in Snowdonia, and the night temperature rises similarly to the previous month as well, its value is 5 °C (41 °F). The rainfall amount continues to descent, the value of this measure is 103 mm (4.05 in). The humidity is on its minimum, its value is 82 %. The maximum of the number of sun hours (without clouds) can be noticed in this month.
June weather
The tourist season is about to start in Snowdonia. The day temperature continues to rise, with its value of 15 °C (59 °F). The minimum of the number of rainy days can be noticed, with its value being 12 days, and the minimum of the rainfall amount can be noticed too, the value of this measure is 102 mm (4.01 in). The maximum of the day length can be noticed, with its value of 17 hours.
July weather
The ongoing tourist season is noticeable this month in Snowdonia. The day temperature reaches its maximum, while the night temperature rises similarly to the previous month. The rainfall amount rise's start could be observed in this month. The wind speed reaches its minimum in July.
We make the most from 40 years of historical weather data to predict the best weather conditions.August weather
The night temperature reaches its maximum, with its value of 9 °C (49 °F) in Snowdonia. The ongoing tourist season is noticeable. The number of rainy days rise's start could be observed, with its value being 14 days, while the rise of the rainfall amount can be observed, the value of this measure is 128 mm (5.03 in).
September weather
The day temperature starts to descent in Snowdonia, and the night temperature descent's start could be observed as well in September. The rise of the rainfall amount can be observed, its value is 137 mm (5.39 in). The beginning of the descent of the number of sun hours (without clouds) could be noticed in September.
October weather
The day temperature descents similarly to the previous month, the value of this measure is 11 °C (51 °F) in Snowdonia, and the night temperature descents similarly to the previous month too, its value is 5 °C (41 °F). The number of rainy days starts to rise, its value is 17 days, while the maximum of the rainfall amount can be noticed, the value of this measure is 193 mm (7.58 in). The descent of the number of sun hours (without clouds) can be observed, with its value of 3 hours.
November weather
The day temperature continues to descent in Snowdonia, and the night temperature descents similarly to the previous month as well, with its value being 3 °C (37 °F). The wet season is at its beginning. The number of sun hours (without clouds) descents similarly to the previous month, the value of this measure is 2 hours. The number of rainy days is on its maximum, its value is 18 days.
December weather
The day temperature descents similarly to the previous month, its value is 5 °C (42 °F) in Snowdonia, and the night temperature continues to descent too. The number of sun hours (without clouds) reaches its minimum, with its value being 1 hour. The humidity is on its maximum, the value of this measure is 91 %. The wet season is taking place.
FAQs
How windy is it in Snowdonia in April?
In April in Snowdonia, there will be an average wind scale of 6. It is rather a stronger wind, which lowers the sensible temperature and cools down.
Is there a dry season in May in Snowdonia?
No, May is not a dry month in Snowdonia, expect rain approximately 12 days in a month.
Are there good conditions to visit in June in Snowdonia?
June is a good month to visit Snowdonia. A relatively low temperature of 15 °C (59 °F) may be ideal for walking or outdoor activities, but some people may have a different idea of the holiday. The temperature of 8 °C (46 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
Is July part of the wet season in Snowdonia?
No, there is no wet season in Snowdonia in July - you can expect 12 days of rain during the month.
We make the most from 40 years of historical weather data to predict the best weather conditions.What is the temperature in Snowdonia during the day in August?
In Snowdonia in August, the average daily temperatures will be 16 °C (61 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
What is the sea temperature in September in Snowdonia?
The sea will reach 16 °C (60 °F) in September in Snowdonia. This is a sea temperature for resilient people only, most people won't enjoy swimming in such cold water or will have to use a wetsuit for water activities.
What is the average number of rainy days in Snowdonia in October?
In October in Snowdonia, we can expect 17 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 3.9 days of the week, or in general - 55 % days.