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Fishing Weather

Lyn Clywedog Reservoir Climate History

Past weather including monthly averages for Lyn Clywedog Reservoir

Powys, United Kingdom

Country Overview For United Kingdom

The climate in United Kingdom is typically temperate; moderated by prevailing southwest winds over the North Atlantic Current; more than one-half of the days are overcast. The terrain: mostly rugged hills and low mountains; level to rolling plains in east and southeast. For London in January the daily average maximum temperatures is 7°C with the average minimum 3°C, while in June the average maximum is 19°C with a minimum of 11°C. The wettest month for London is October with an average of 87.3mm of precipitation falling while the driest month is March with 46.0mm falling.


 

HISTORICAL MONTHLY AVERAGES FOR APRIL

The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to Lyn Clywedog Reservoir.

Temperature

Throughout the month of April daytime temperatures will generally reach highs of around 13°C that's about 55°F. At night the average minimum temperature drops down to around 4°C, that's 39°F.

In recent times the highest recorded temperature in April has been 25°C that's 78°F, with the lowest recorded temperature -13°C, about 9°F.

Relative Humidity

The average daily relative humidity for April is around 79%.

Heat Index

The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.

Comfort Levels: Given average maximum temperatures and humidity levels generally you should not anticipate any discomfort from heat (see heat index for more information).

Precipitation

The average monthly amount of precipitation has been recorded at around 62 mm, that's 2 inches.

Estimated Hours of Sunshine per Day

We calculate sunshine hours per day using our past forecast data. For April expect the sun to shine for an average of 7 hours per day. This represents the average number of hours in the daytime that the sun is visible and not obscured by cloud e.g. the average number of hours the sun is actually out and shining. Note we calculate hours of sunshine per day using our past forecast data, not observation data, thus it is an estimate and not actual.

Wind

The average daily wind speed in April has been around 11 km/h, that’s the equivalent to about 7 mph, or 6 knots. In recent years the maximum sustained wind speed has reached 48 km/h, that’s the equivalent of around 30 mph, or 26 knots.

SWIMMING AND WATER TEMPERATURE

The temperature of water an individual will feel comfortable in is very much personal preference. What feels unbearably cold to one person for a swim might be fine for another. We have created our own Swimming Water Temperature Index offering a guide to water temperature and comfort levels for swimming;

In April, for the nearest coastal location, the temperature of the sea averages around 10°C, that's 50° Fahrenheit. Our index indicates for swimming this is considered cold and even the most hardy among us would find any more than a few minutes in the water uncomfortable.

 

YEARLY TRENDS: WEATHER AVERAGES & EXTREMES

The following charts show yearly weather trends with information on monthly weather averages and extremes.

Temperature

The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.

Precipitation Amount

The chart below plots the average monthly precipitation amount.

Wind Speed

The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.

 


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