Castlegregory Temperature by Month
Castlegregory in Kerry, Ireland sees moderate seasonal temperature shifts, with daytime highs between 10°C (50°F) in January and 19°C (66°F) in August, averaging 14°C (57°F) annually. Explore the full monthly breakdown below.
Castlegregory Monthly Temperatures
The weather in Castlegregory changes moderately throughout the year, offering enough variation to appreciate each season. Nights are cooler, with lows ranging from 12°C (54°F) to 5°C (41°F).
The chart below illustrates the average maximum day and minimum night temperatures in Castlegregory by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 139 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Castlegregory vs Ireland
The map below shows the annual temperature across Ireland. You can also select individual months if you want to compare a specific time of year.
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Castlegregory vs World: Temperature Compared
Castlegregory's average annual maximum temperature is 14°C (57°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in Castlegregory?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Castlegregory, January is the coolest month, with average highs of 10°C (50°F) and humidity around 78% — considered high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Castlegregory this rarely lasts long on the ground.
For more on Castlegregory's weather — including monthly rainfall, sunshine hours, and humidity — visit our Castlegregory climate page.
