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Best Time to Visit Shannon
Real month-by-month weather for Shannon, and real flight prices from London — so "best time" here means something you can check, not a generic guess. June runs warmest (21°C avg high).
Shannon by month: weather & fares
Weather is averaged from 3 years of real historical data. Fares are the real cheapest on file from London that month.
| Month | Avg high / low | Avg rainfall | Cheapest fare |
|---|---|---|---|
| January | 8° / 3°C | ~107mm | — |
| February | 10° / 5°C | ~75mm | — |
| March | 11° / 5°C | ~122mm | — |
| April | 14° / 7°C | ~93mm | — |
| May | 17° / 9°C | ~79mm | — |
| June | 21° / 13°C | ~139mm | — |
| July | 18° / 13°C | ~131mm | — |
| August | 19° / 13°C | ~99mm | — |
| September | 17° / 11°C | ~153mm | — |
| October | 14° / 9°C | ~131mm | — |
| November | 11° / 6°C | ~198mm | — |
| December | 10° / 5°C | ~139mm | — |
Nearby airports
- Inisheer Aerodrome (INQ)56 km
- Inishmaan Aerodrome (IIA)61 km
- Inishmore Aerodrome (IOR)66 km
- Connemara Regional Airport (NNR)69 km
Planning tips for Shannon
- Compare the weather and fare columns above together — the cheapest month isn't always the best-weather month.
- Shoulder-season travel (just before or after the busiest months) often balances good weather against lower prices.
- Book 4-8 weeks ahead where possible — a general pattern, not a guarantee for this specific destination.
- Check nearby airports above if Shannon has real alternatives — a short extra journey can mean a much lower fare.
- Factor in local public holidays and school terms at your destination, not just at home — prices and crowds follow both.
- Re-check rainfall, not just temperature — a warm month can still be a very wet one.
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FAQs — Best time to visit Shannon
June has the highest average temperatures, based on 3 years of real historical weather data.