Temperatures in April
It's cool in April in Castlerock with an average temperature of 12°C. Temperatures this month range from a low of 9°C to a high of 15°C. At night, you can expect temperatures between 4°C and 7°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Castlerock in April. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of April
The month of April starts in Castlerock with cold temperatures, averaging around 11°C during the day and nights close to 6°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-April
By mid-April, the average daytime temperature rises to around 12°C, with nights close to 6°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of April
By the end of April, the average daytime temperature in Castlerock will be around 13°C, with nights close to 6°C. A shower might show up, but overall the weather will be dry and sunny.
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Water temperature
The water temperature at Castlerock is 17°C this month. You can swim, but it's a bit on the chilly side.
Precipitation in April
In April, there is an average of 48 mm of precipitation, spread over 12 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 39% per day this month. The weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in April for Castlerock. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Castlerock in April |
London | ||
|---|---|---|---|
 Average Temperature |
12°C | 15°C | |
 High Temp |
15°C | 18°C | |
| Low Temp |
9°C | 12°C | |
 Total Precipitation |
48 mm | 29 mm | |
| Rainy Days |
12 days | 7 days | |
March
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Temperature records for Castlerock in April
With 20°C, Castlerock hit the highest temperature in the last 10 years in April 2019. The lowest daytime temperature in this month was 3°C in 2018. The extreme night temperatures ranged from a low of -1°C to a high of 12°C.
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Daily Temperature in April in Castlerock
This chart shows the average daily temperatures, both day and night, for each day in April in Castlerock, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in April in Castlerock
The chart below shows the average daily precipitation in April for Castlerock, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for April, you can expect around 12 days of rain in Castlerock.
Daily UV Index in April in Castlerock
This chart shows the average daily UV index in April in Castlerock, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in April in Castlerock Over the Years
This chart shows the average temperature in April in Castlerock, measured in degrees Celsius, over the past years.
Total Precipitation in April in Castlerock Over the Years
This chart shows the average precipitation in April in Castlerock, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in April for Castlerock
Click on a specific day in April for detailed info on the typical weather on that day in Castlerock. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in April in Castlerock
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Average Weather in Castlerock by Month
Click on a month below to see detailed weather info for Castlerock. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Castlerock for all months at once
