Weather in Shannon in August 2025
Average weather
Average temperature in Shannon in August
Going from a maximum of +75°F during the day to a minimum of +50°F during the night, the temperature in August averages around +64°F.
The average maximum temperature goes up 14% by the end of the month, compared with the beginning of the month, from +63°F to +66°F.
Is Shannon warm or cold in August?
Shannon is typically mild in August.
Maximum temperatures go down compared to the previous month from +66°F to +64°F. The minimum temperature also goes up from +54°F to +54°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the warmest months in Shannon, here is the comparison with other months:
Climate in Shannon in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +66°F | +64°F | +63°F | ||||
| Min. temperature | ||||||
| +43°F | +39°F | +34°F | ||||
| Max. temperature | ||||||
| +86°F | +82°F | +81°F | ||||
| Rainfall | ||||||
| 75 mm | 91 mm | 80 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 82% | 84% | 85% | ||||
| Air pressure | ||||||
| 1014 HPa | 1014 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 1 | 1 | 1 | ||||
| Cloudy days | ||||||
| 9 | 9 | 10 | ||||
| Rainy days | ||||||
| 21 | 22 | 19 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting colder in August. From +66°F in the day, the average maximum temperature lowers to +64°F. Prepare for more rain. Average rainfall goes from 75 mm to 91 mm. Humidity rises from 82% to 84%. The average wind speed doesn’t change much during August, staying around 3 m/s. The amount of sunny days stay about the same, averaging 1 sunny days during the month.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Shannon is gradually increasing during August, going from 4 m/s to 4 m/s over the course of the month.
Rain
How was the weather last August in Shannon?
Climate Change Over the Years
The climate in Shannon in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1979 (+53°F) and the highest in 2023 (+57°F). The driest year was 2001 with only 746 mm of rainfall, and the wettest year was 2009 with 1263 mm.
FAQ
Is August a good time to visit Shannon?
Can you sunbathe in Shannon in August?
Is Shannon rainy in August?
Is it sunny in Shannon in August?
Other cities in Ireland
Monthly weather in Shannon
Source of the data
For this page, we’ve looked at the typical weather in Shannon, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.