Galway has a oceanic/humid subtropical climate, classified as Cfb in the Köppen system. The warmest month is July with an average high of 18°C, while the coldest month is January with lows dropping to 4°C. The annual temperature range of 14°C indicates a relatively stable climate year-round.
The driest month is September with only 13 rain days and 80mm of precipitation. For travellers, September through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 65% to 65% throughout the year.
Best Time to Visit Galway
Based on temperature and rainfall data, the best months to visit Galway are May, June, July. These months offer the most comfortable temperatures with relatively low rainfall, ideal for sightseeing and outdoor activities.
In July, Galway experiences average highs of 18°C (64°F) and lows of 12°C (54°F). Expect around 15 rainy days and 8 hours of sunshine per day, with humidity averaging 65%. The 6°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 10, so sun protection is advisable on clear days.
Galway typically sees 15 rainy days in July, with total precipitation of around 91mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Galway typically sees 4-6 fewer rain days than July.
Pack a warm jacket, sweaters, and layering pieces for Galway in July. Temperatures can drop to 12°C at night, so thermal underlayers are advisable for evening outings. Waterproof footwear is important with 15 rainy days expected. A scarf, hat, and gloves handle the windchill on clear cold days, which often feel colder than the thermometer reads.
July is a reasonable time to visit Galway. Expect 15 rainy days, so pack a light rain layer for flexibility. Average temperatures of 18°C make outdoor exploration comfortable during the dry periods. With 8 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.
The average high temperature in Galway in July is 18°C (64°F), and the average low is 12°C (54°F). The mean daily temperature is approximately 15°C (59°F). The day-to-night range of 6°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Galway is generally May. May offers the most sunshine at 10 hours per day. Average temperatures reach 15°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around May gives you the best chance of dry, bright weather.
July is shoulder or low season in Galway, meaning fewer tourists and generally lower prices than peak months. With 8 sunshine hours and 15 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In July, Galway suits a range of activities thanks to cool conditions around 18°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 8 hours of sunshine, parks and waterfront walks are particularly enjoyable.