Dundalk, Ireland Climate by Month
Dundalk, Leinster, Ireland
Mild summers and cool winters, with rain spread through the year.
Mild summers and cool winters, with rain spread through the year: that's Dundalk's climate in short. Afternoon highs range from 46°F (8°C) in January to 68°F (20°C) in July, and January nights average 35°F (2°C). About 44 in (1121 mm) of rain falls in a typical year, with no clear rainy season. The air is humid, averaging 85% relative humidity.
- Warmest month
- 68°F(20°C)
- Average high, July
- Coldest nights
- 35°F(2°C)
- Average low, January
- Rain per year
- 44 in(1121 mm)
- No clear rainy season
- Humidity
- 85%
- Sunniest: June
Best and worst months in Dundalk
Best for weatherThe most comfortable weather comes in July, with highs around 68°F (20°C) and about 3.2 in (82 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 46°F (8°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in July.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Dundalk weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 46°F(8°C) | 35°F(2°C) | 4.1 in(105 mm) | 93% | 0.6 |
| FebFebruary | 47°F(9°C) | 35°F(2°C) | 3.5 in(88 mm) | 90% | 1.3 |
| MarMarch | 51°F(11°C) | 37°F(3°C) | 3.3 in(85 mm) | 81% | 2.2 |
| AprApril | 55°F(13°C) | 40°F(5°C) | 2.8 in(70 mm) | 80% | 3.7 |
| MayMay | 61°F(16°C) | 44°F(7°C) | 2.8 in(70 mm) | 74% | 4.7 |
| JunJune | 65°F(18°C) | 49°F(10°C) | 3.3 in(83 mm) | 82% | 4.8 |
| JulJulyBest | 68°F(20°C) | 53°F(12°C) | 3.2 in(82 mm) | 78% | 4.4 |
| AugAugust | 67°F(19°C) | 52°F(11°C) | 4.0 in(102 mm) | 81% | 3.7 |
| SepSeptember | 63°F(17°C) | 49°F(9°C) | 3.4 in(87 mm) | 85% | 2.7 |
| OctOctober | 57°F(14°C) | 44°F(7°C) | 4.3 in(110 mm) | 88% | 1.5 |
| NovNovember | 50°F(10°C) | 39°F(4°C) | 5.2 in(131 mm) | 90% | 0.8 |
| DecDecember | 46°F(8°C) | 36°F(2°C) | 4.3 in(108 mm) | 92% | 0.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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