Climate Insights for Cahersiveen

The climate in Cahersiveen is temperate. The average annual temperature is 11°C and approximately 1492mm of precipitation falls per year. Cahersiveen receives a notable amount of rainfall throughout the year, including during its driest month. Cahersiveen is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are March, January, February, when temperatures can drop to 5°C.

Cahersiveen sees moderate temperature variation throughout the year, ranging from 5°C to 17°C. August is the warmest month, though highs remain moderate at 17°C with a mean of 15°C. March is the coolest month, with minimum temperatures around 5°C and an average of 8°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between April and May, with a 2°C shift in average temperatures.

Cahersiveen is a fairly wet location, receiving approximately 1492mm of precipitation annually, which averages out to around 124mm per month. The wettest month is December, averaging 183mm of rainfall. November and October also tend to see above-average precipitation. The driest month is April, with just 75mm. That's 108mm less than December, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Cahersiveen is moderately windy, with an average annual wind speed of 27km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 33km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in July, with average winds dropping to 23km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 10km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 32km/h in winter, 25km/h in spring, 24km/h in summer, 27km/h in autumn.

It is currently spring in Cahersiveen, which began on March 20, 2026. Cahersiveen is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 17°C, while the coldest stretch bottoms out in March near 5°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The table below shows monthly climate averages for Cahersiveen based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.