June weather forecast
Castleknock, Ireland

June

Weather in June

June, the first month of the summer in Castleknock, is an enjoyable month, with an average temperature varying between 9.3°C (48.7°F) and 16°C (60.8°F).

Temperature

Castleknock records an average high-temperature of a still refreshing 16°C (60.8°F) in June, closely mirroring the climate of the previous month. Castleknock's average low-temperature for the month of June records at a chilly 9.3°C (48.7°F).

Humidity

The average relative humidity in June in Castleknock is 87%.

Rainfall

In June, the rain falls for 19 days. Throughout June, 64mm (2.52") of precipitation is accumulated. In Castleknock, during the entire year, the rain falls for 209.2 days and collects up to 564mm (22.2") of precipitation.

Snowfall

In Castleknock, Ireland, snow does not fall in April through October.

Daylight

With an average of 16h and 54min of daylight, June has the longest days of the year in Castleknock.
On the first day of the month, sunrise is at 5:03 am and sunset at 9:43 pm. On the last day of June, sunrise is at 5:01 am and sunset at 9:57 pm IST.

Sunshine

In June, the average sunshine in Castleknock is 6.6h.

UV index

May, June and August, with an average maximum UV index of 4, are months with the highest UV index in Castleknock. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 4 during June translates into these guidelines:
Take necessary precautions - Protection from skin and eye injury is mandatory. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

Frequently asked questions

What are the temperatures in Castleknock in June?
The high-temperature in Castleknock during June is 16°C (60.8°F) and the low-temperature is 9.3°C (48.7°F).
What is the average humidity in June in Castleknock?
In June, the average relative humidity in Castleknock, Ireland, is 87%.
How many days does it rain in June in Castleknock?
In June, in Castleknock, Ireland, the rain falls for 19 days. Throughout June, 64mm (2.52") of precipitation is accumulated.
When it does not snow in Castleknock?
April through October are months without snowfall.
When are the longest days in Castleknock?
The month with the longest days in Castleknock is June, with an average of 16h and 54min of daylight.
How many hours of daylight does Castleknock have in June?
In Castleknock, Ireland, the average day length in June is 16h and 55min.
When is the sunrise / sunset in June in Castleknock?
On the first day of June in Castleknock, sunrise is at 5:03 am and sunset at 9:43 pm. On the last day of the month, sunrise is at 5:01 am and sunset at 9:57 pm IST.
How many hours of sunshine does Castleknock have in June?
In June, the average sunshine duration in Castleknock is 6.6h.
When is the highest UV index in Castleknock?
May, June and August, with an average maximum UV index of 4, are months with the highest UV index in Castleknock, Ireland.
How high is the UV index in June in Castleknock?
The average daily maximum UV index in June in Castleknock is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in June
Castleknock, Ireland
  • Average high temperature in June: 16°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 June: 9.3°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 June
Castleknock, Ireland
  • Average pressure in June: 1015.3mbar

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 June
Castleknock, Ireland
  • Average wind speed in June: 13.6km/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 June
Castleknock, Ireland
  • Average humidity in June: 87%

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 June
Castleknock, Ireland
  • Average rainfall in June: 64mm

The wettest month (with the highest rainfall) is August (71mm).
The driest month (with the least rainfall) is April (30mm).

Average rainfall days in June
Castleknock, Ireland
  • Average rainfall days in June: 19 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 June
Castleknock, Ireland
  • Average snowfall in June: 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 June
Castleknock, Ireland
  • Average snowfall days in June: 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 June /
Average sunshine in June
Castleknock, Ireland
  • Average daylight in June: 16h and 5min

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 June: 6h and 4min

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 June
Castleknock, Ireland
  • Average sunshine days in June: 8.1 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 June
Castleknock, Ireland
  • Average UV index in June: 4

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 June
Castleknock, Ireland
  • Average cloud cover in June: 59

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 June
Castleknock, Ireland
  • Average visibility in June: 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).

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