Ennis, Ireland climate

Cfb Oceanic / temperate

Ennis has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 20°C, while the coldest is January averaging around 3°C at night. Precipitation is fairly even year-round, totalling about 1065 mm. At latitude 53°N, day length swings from 7.4 hours in midwinter to 16.6 hours at midsummer.

☀️ Summers

Mild

Highs near 20°C in July.

❄️ Winters

Chilly

Lows near 3°C in January.

🌧️ Rain

Wet

About 1065 mm of rain a year.

Wettest in December

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Ennis climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	9	10	11	14	16	18	20	19	18	14	11	9
Avg temp (°C)	6	6	8	10	12	15	16	16	14	11	8	7
Avg low (°C)	3	3	4	6	8	11	13	12	11	8	6	4
Precipitation (mm)	109	95	83	63	66	69	76	92	84	105	107	116

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	9	10	11	14	16	18
Avg temp (°C)	6	6	8	10	12	15
Avg low (°C)	3	3	4	6	8	11
Precipitation (mm)	109	95	83	63	66	69

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	20	19	18	14	11	9
Avg temp (°C)	16	16	14	11	8	7
Avg low (°C)	13	12	11	8	6	4
Precipitation (mm)	76	92	84	105	107	116

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	77	78	76	75	76	78	79	77	74	74	75	76
Relative humidity (%)	94	92	90	87	84	83	85	86	88	90	93	94
Wind speed (m/s)	4.1	4.1	3.8	3.5	3.4	3.2	3.2	3.2	3.3	3.6	3.7	4.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	77	78	76	75	76	78
Relative humidity (%)	94	92	90	87	84	83
Wind speed (m/s)	4.1	4.1	3.8	3.5	3.4	3.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	79	77	74	74	75	76
Relative humidity (%)	85	86	88	90	93	94
Wind speed (m/s)	3.2	3.2	3.3	3.6	3.7	4.0

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Shannon, a weather station, about 16 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →