Letterfrack Temperature by Month
Letterfrack in Galway County, Ireland sees moderate seasonal temperature shifts, with daytime highs between 10°C (50°F) in February and 18°C (64°F) in August, averaging 13°C (55°F) annually. Explore the full monthly breakdown below.
Letterfrack Monthly Temperatures
The climate in Letterfrack experiences moderate temperature changes, with mild shifts between seasons. At night, temperatures range from 13°C (55°F) in August to 5°C (41°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Letterfrack by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. August, the warmest month, averages 118 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Letterfrack 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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Letterfrack vs World: Temperature Compared
Letterfrack's average annual maximum temperature is 13°C (55°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Letterfrack?
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 Letterfrack, February is the coolest month, with average highs of 10°C (50°F) and humidity around 86% — considered very 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 Letterfrack this rarely lasts long on the ground.
For more on Letterfrack's weather — including monthly rainfall, sunshine hours, and humidity — visit our Letterfrack climate page.
