What’s the climate like in Castlerock?
The current climate of Castlerock features average monthly temperatures ranging from highs of 18°C during the day to lows of 8°C. The average yearly temperature is around 13°C. At night, temperatures in the colder months average around 3°C and in the warmer months around 12°C.
The highest temperature recorded in Castlerock in recent years was 26°C in July 2021. The lowest daytime temperature recorded was -1°C in February 2018.
On average, Castlerock gets 1016 mm of precipitation each year. Of this, about 5,5 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.
Best time to visit Castlerock?
The best time to visit Castlerock for pleasant to warm weather is June through September. There might be some rain during this period, but the temperatures are just right for exploring Castlerock.
Climate Table of Castlerock
The climate table of Castlerock shows the average temperatures, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 8 | 8 | 10 | 12 | 14 | 17 | 18 | 18 | 16 | 13 | 10 | 9 |
| Temp. min (°C) | 4 | 4 | 4 | 6 | 8 | 11 | 12 | 12 | 11 | 9 | 6 | 5 |
| Precipitation |  |
|
|
|
|
|
|
|
|
|
|
|
| Precipitation (mm) | 103 | 97 | 78 | 48 | 63 | 61 | 87 | 91 | 76 | 94 | 110 | 108 |
| Snow (cm) | 1,3 | 2,4 | 1,4 | 0,1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,3 |
| UV Index | 1 | 2 | 3 | 5 | 5 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 13°C
- Highest temperature: 18°C in July and August
- Lowest temperature: 8°C in January and February
- Precipitation*: 1016 mm per year, averaging 85 mm per month
- Snowfall: 5,5 cm per year
- Driest months: 48 mm in April, 61 mm in June and 63 mm in May
- Wettest months: 110 mm in November, 108 mm in December and 103 mm in January
*Precipitation is measured as a combination of rain, snow, and hail
Plan your next holiday
Don’t miss the best holiday deals for Castlerock and see what our partners have for you.
Table of Contents
Average Temperature per Month in Castlerock
This graph shows the average maximum temperatures per month in Castlerock, Northern Ireland. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Castlerock
This graph shows how much precipitation Castlerock, Northern Ireland, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Castlerock
This graph shows how much snow Castlerock, Northern Ireland, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Castlerock
This graph shows the average UV index per month in Castlerock, Northern Ireland. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Castlerock
This graph shows the average yearly temperature in Castlerock, Northern Ireland. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Castlerock
This chart shows the total yearly precipitation in Castlerock, Northern Ireland, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Castlerock
This chart shows the total yearly snowfall in Castlerock, Northern Ireland, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
Weather experiences in Castlerock
Have you been to Castlerock?
Share your weather experiences in Castlerock.
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.
