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The weather in Letterkenny in January is very cold with temperatures between 1°C and 6°C, warm clothes are a must.
You can expect rain for roughly half of the month of January in Letterkenny. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
You can expect a few days of snow in Letterkenny during January. It’s important to get out your snow boots and warm mittens to stay warm while you explore Letterkenny.
Our weather forecast can give you a great sense of what weather to expect in Letterkenny in January 2025.
If you’re planning to visit Letterkenny in the near future, we highly recommend that you review the 14 day weather forecast for Letterkenny before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 1° | 9 | 18 | 4 | 78 mm | Awful | Letterkenny in January |
| February | 7° / 1° | 9 | 15 | 4 | 77 mm | Awful | Letterkenny in February |
| March | 9° / 2° | 8 | 21 | 3 | 66 mm | Awful | Letterkenny in March |
| April | 12° / 3° | 5 | 24 | 1 | 48 mm | Ok | Letterkenny in April |
| May | 14° / 5° | 6 | 25 | 0 | 69 mm | Good | Letterkenny in May |
| June | 17° / 8° | 6 | 24 | 0 | 78 mm | Good | Letterkenny in June |
| July | 18° / 10° | 7 | 24 | 0 | 90 mm | Ok | Letterkenny in July |
| August | 17° / 10° | 6 | 25 | 0 | 76 mm | Good | Letterkenny in August |
| September | 16° / 8° | 6 | 24 | 0 | 59 mm | Good | Letterkenny in September |
| October | 13° / 6° | 8 | 23 | 0 | 79 mm | Bad | Letterkenny in October |
| November | 9° / 4° | 8 | 21 | 0 | 80 mm | Bad | Letterkenny in November |
| December | 7° / 2° | 8 | 21 | 2 | 76 mm | Awful | Letterkenny in December |