Castlereagh Weather and Climate: A Comprehensive Guide
The temperature in Castlereagh varies moderately throughout the year.
The temperatures shift from pleasant
to cold.
It is also known for its large amounts of rainfall.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
The weather in Castlereagh changes moderately throughout the year, offering enough variation to appreciate each season. Typically, average maximum daytime temperatures range from a pleasant 18°C in July to a chilly 9°C in the coolest month, February.
Nights are cooler, with lows often dropping to around 4°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Castlereagh has a relatively rainy climate with high precipitation levels, averaging 1057 mm of rainfall annually. Precipitation levels in Castlereagh remain relatively steady throughout the year. October has the most rain, with 103 mm over 19 days. In March, this drops slightly to 74 mm, making the city's climate fairly predictable.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
For those who appreciate different seasons, Castlereagh serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.1 hours of sunshine daily, and embrace the darker days in December, offering only 1.3 hours of daily sunlight. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average water temperature
The mean water temperature over the year ranges from 7°C in February to 13°C in August.
Water temperature over the year
Average humidity
The city experiences its highest humidity in September, reaching 91%. In February, the humidity drops to its lowest level at 86%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed varies between 4 m/s and 5 m/s throughout the year. It is lowest in April, May, June, July, August and September and highest during January, February, March, October, November and December.
The mean monthly wind speed over the year (meters per second)
overcast and slight rain broken clouds and no rain overcast and rainForecast for Castlereagh
4 m/s
5 m/s
7 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Castlereagh in the United Kingdom
Other facts from our historical weather data:July has an average maximum temperature of 18°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 9°C.
October tops the wettest month list with 103 mm of rainfall.
March is the driest month with 74 mm of precipitation.
May is the sunniest month with an average of 184 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
