Shannon weather by month & the best time to visit
Ireland · small town · oceanic / maritime climate
The best time to visit Shannon is July — its sunniest month (Sunshine Score 64/100), with August and June close behind. Shannon averages about 1,468 hours of sunshine a year. Daytime highs around 19°C / 66°F and roughly 92 mm of rain in July.
When is the best time to visit Shannon?
For sunshine, the best time to visit Shannon is July, then August and June. The dullest month is January (0/100, 104 mm of rain). The full month-by-month picture is in the table below.
How sunny is Shannon?
Shannon isn't a sunny place by world standards: about 1,468 hours of sunshine a year. 64 Sunshine Score points separate July (64) from January (0), so the month you pick matters. It ranks #3 of 10 destinations in Ireland for annual sunshine, above the national median of 1,418 hours. The year's 1,091 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | 8° / 46°F | 4° / 39°F | 104 mm | 0 |
| February | 6 | 9° / 48°F | 3° / 37°F | 81 mm | 1 |
| March | 12 | 10° / 50°F | 3° / 37°F | 77 mm | 2 |
| April | 31 | 13° / 55°F | 5° / 41°F | 68 mm | 3 |
| May | 49 | 16° / 61°F | 8° / 46°F | 76 mm | 4 |
| June | 60 | 18° / 64°F | 10° / 50°F | 83 mm | 5 |
| July | 64 | 19° / 66°F | 12° / 54°F | 92 mm | 4 |
| August | 64 | 19° / 66°F | 12° / 54°F | 96 mm | 4 |
| September | 54 | 17° / 63°F | 10° / 50°F | 82 mm | 3 |
| October | 34 | 14° / 57°F | 8° / 46°F | 101 mm | 1 |
| November | 16 | 11° / 52°F | 6° / 43°F | 119 mm | 1 |
| December | 6 | 9° / 48°F | 4° / 39°F | 112 mm | 0 |
Nearest destinations
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Head-to-head
How Shannon compares month by month: Shannon vs Dublin · Shannon vs Cork · Shannon vs Charlestown · all comparisons
Shannon: questions and answers
What kind of destination is Shannon?
Shannon is a small town in Ireland with a oceanic / maritime climate.
How many hours of sunshine does Shannon get a year?
Shannon gets about 1,468 hours of sunshine a year, at its best around July.
When is the best time to visit Shannon?
The sunniest time to visit Shannon is July, when the Sunshine Score peaks at 64/100 (with August and June close behind). Expect daytime highs around 19°C / 66°F.
What is the least sunny month in Shannon?
January is the least sunny month in Shannon, scoring 0/100 with about 104 mm of rain.
How strong is the sun in Shannon?
The typical midday UV index in Shannon peaks around 5 (moderate) in June, easing to about 0 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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