April weather forecastCastleknock, Ireland
April
Weather in April
April in Castleknock, Ireland, is a cool spring month, with an average temperature ranging between max 10.9°C (51.6°F) and min 4.6°C (40.3°F).Temperature
Castleknock's average high-temperature in April sits at a fresh 10.9°C (51.6°F), showing little difference from the previous month. During April, Castleknock observes a consistent average nighttime temperature of 4.6°C (40.3°F).Humidity
March through May, with an average relative humidity of 85%, are the least humid months.Rainfall
The month with the least rainfall is April, when the rain falls for 16.8 days and typically collects 30mm (1.18") of precipitation.Snowfall
In Castleknock, snow does not fall in April through October.Daylight
In April, the average length of the day is 14h and 2min.On the first day of April, sunrise is at 6:57 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:53 pm IST.
Sunshine
April and May, with an average of 6.7h of sunshine, are months with the most sunshine.UV index
The average daily maximum UV index in April in Castleknock is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 3 in April suggests the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Castleknock, Ireland
- Average high temperature in April: 10.9°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (7°C).
- Average low temperature in April: 4.6°C
The month with the highest average low temperature is July (11.2°C).
The coldest month (with the lowest average low temperature) is February (2.5°C).
Average pressure in April
Castleknock, Ireland
- Average pressure in April: 1014.8mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.3mbar).
Average wind speed in April
Castleknock, Ireland
- Average wind speed in April: 15.6km/h
The windiest month (with the highest average wind speed) is January (21.1km/h).
The calmest months (with the lowest average wind speed) are June and July (13.6km/h).
Average humidity in April
Castleknock, Ireland
- Average humidity in April: 85%
The month with the highest relative humidity is December (90%).
The months with the lowest relative humidity are March, April and May (85%).
Average rainfall in April
Castleknock, Ireland
- Average rainfall in April: 30mm
The wettest month (with the highest rainfall) is August (71mm).
The driest month (with the least rainfall) is April (30mm).
Average rainfall days in April
Castleknock, Ireland
- Average rainfall days in April: 16.8 days
The month with the highest number of rainy days is August (24.2 days).
The month with the least rainy days is February (13.6 days).
Average snowfall in April
Castleknock, Ireland
- Average snowfall in April: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in April
Castleknock, Ireland
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Castleknock, Ireland
- Average daylight in April: 14h and 0min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in April: 6h and 42min
The months with the most sunshine are April and May (Average sunshine: 6h and 42min).
The months with the least sunshine are February, October and November (Average sunshine: 3h and 54min).
Average sunshine days in April
Castleknock, Ireland
- Average sunshine days in April: 10.8 days
The month with the most sunshine days is January (13.2 days).
The month with the least sunshine days is August (3.4 days).
Average UV index in April
Castleknock, Ireland
- Average UV index in April: 3
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, November and December (UV index 2).
Average cloud cover in April
Castleknock, Ireland
- Average cloud cover in April: 55
The month with the most cloud cover is July (Cloud cover 64).
The month with the least cloud cover is April (Cloud cover 55).
Average visibility in April
Castleknock, Ireland
- Average visibility in April: 9km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (9km).
The months with the lowest visibility are July, August and September (8km).
