Compare Irish counties
Pick two or three counties to see their rainfall, sunshine and temperatures side by side, month by month.
Leitrim gets 11% more rain a year than Cavan (1231 mm against 1106 mm), with 4 more rain days and 25 fewer hours of sunshine. July afternoons average 19°C in Leitrim and 19°C in Cavan; January nights 3°C and 2°C.
Rainfall by month
0 50 100 150 Leitrim, Jan: 83 mm Leitrim, Feb: 99 mm Leitrim, Mar: 91 mm Leitrim, Apr: 90 mm Leitrim, May: 83 mm Leitrim, Jun: 92 mm Leitrim, Jul: 103 mm Leitrim, Aug: 108 mm Leitrim, Sep: 104 mm Leitrim, Oct: 150 mm Leitrim, Nov: 106 mm Leitrim, Dec: 122 mm Cavan, Jan: 73 mm Cavan, Feb: 93 mm Cavan, Mar: 87 mm Cavan, Apr: 84 mm Cavan, May: 81 mm Cavan, Jun: 77 mm Cavan, Jul: 100 mm Cavan, Aug: 94 mm Cavan, Sep: 108 mm Cavan, Oct: 133 mm Cavan, Nov: 81 mm Cavan, Dec: 95 mm Donegal, Jan: 87 mm Donegal, Feb: 101 mm Donegal, Mar: 86 mm Donegal, Apr: 91 mm Donegal, May: 85 mm Donegal, Jun: 88 mm Donegal, Jul: 108 mm Donegal, Aug: 109 mm Donegal, Sep: 98 mm Donegal, Oct: 129 mm Donegal, Nov: 104 mm Donegal, Dec: 125 mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daytime high by month
0 5 10 15 Leitrim, Jan: 7 °C Leitrim, Feb: 9 °C Leitrim, Mar: 11 °C Leitrim, Apr: 13 °C Leitrim, May: 16 °C Leitrim, Jun: 18 °C Leitrim, Jul: 19 °C Leitrim, Aug: 19 °C Leitrim, Sep: 17 °C Leitrim, Oct: 14 °C Leitrim, Nov: 10 °C Leitrim, Dec: 8 °C Cavan, Jan: 7 °C Cavan, Feb: 9 °C Cavan, Mar: 10 °C Cavan, Apr: 12 °C Cavan, May: 16 °C Cavan, Jun: 18 °C Cavan, Jul: 19 °C Cavan, Aug: 19 °C Cavan, Sep: 17 °C Cavan, Oct: 14 °C Cavan, Nov: 10 °C Cavan, Dec: 8 °C Donegal, Jan: 7 °C Donegal, Feb: 9 °C Donegal, Mar: 10 °C Donegal, Apr: 12 °C Donegal, May: 15 °C Donegal, Jun: 17 °C Donegal, Jul: 18 °C Donegal, Aug: 18 °C Donegal, Sep: 16 °C Donegal, Oct: 13 °C Donegal, Nov: 10 °C Donegal, Dec: 8 °C Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sunshine by month
0.0 2.5 5.0 7.5 10.0 Leitrim, Jan: 3.8 hours a day Leitrim, Feb: 4.2 hours a day Leitrim, Mar: 5.7 hours a day Leitrim, Apr: 8.3 hours a day Leitrim, May: 10.0 hours a day Leitrim, Jun: 9.5 hours a day Leitrim, Jul: 8.4 hours a day Leitrim, Aug: 8.9 hours a day Leitrim, Sep: 7.0 hours a day Leitrim, Oct: 4.9 hours a day Leitrim, Nov: 4.1 hours a day Leitrim, Dec: 2.9 hours a day Cavan, Jan: 3.9 hours a day Cavan, Feb: 4.1 hours a day Cavan, Mar: 5.7 hours a day Cavan, Apr: 8.4 hours a day Cavan, May: 10.0 hours a day Cavan, Jun: 9.8 hours a day Cavan, Jul: 8.6 hours a day Cavan, Aug: 9.1 hours a day Cavan, Sep: 7.0 hours a day Cavan, Oct: 4.8 hours a day Cavan, Nov: 4.2 hours a day Cavan, Dec: 2.9 hours a day Donegal, Jan: 3.3 hours a day Donegal, Feb: 4.2 hours a day Donegal, Mar: 5.6 hours a day Donegal, Apr: 8.3 hours a day Donegal, May: 9.3 hours a day Donegal, Jun: 8.7 hours a day Donegal, Jul: 7.6 hours a day Donegal, Aug: 8.6 hours a day Donegal, Sep: 6.8 hours a day Donegal, Oct: 4.4 hours a day Donegal, Nov: 3.4 hours a day Donegal, Dec: 2.4 hours a day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rain days by month
0 5 10 15 Leitrim, Jan: 14 days Leitrim, Feb: 16 days Leitrim, Mar: 16 days Leitrim, Apr: 16 days Leitrim, May: 14 days Leitrim, Jun: 16 days Leitrim, Jul: 15 days Leitrim, Aug: 18 days Leitrim, Sep: 16 days Leitrim, Oct: 19 days Leitrim, Nov: 16 days Leitrim, Dec: 17 days Cavan, Jan: 13 days Cavan, Feb: 16 days Cavan, Mar: 16 days Cavan, Apr: 16 days Cavan, May: 15 days Cavan, Jun: 15 days Cavan, Jul: 18 days Cavan, Aug: 18 days Cavan, Sep: 15 days Cavan, Oct: 18 days Cavan, Nov: 14 days Cavan, Dec: 15 days Donegal, Jan: 15 days Donegal, Feb: 16 days Donegal, Mar: 15 days Donegal, Apr: 16 days Donegal, May: 16 days Donegal, Jun: 15 days Donegal, Jul: 18 days Donegal, Aug: 18 days Donegal, Sep: 16 days Donegal, Oct: 18 days Donegal, Nov: 17 days Donegal, Dec: 18 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Figures are averages for 2021–2025 at each county town, from the ERA5 weather reanalysis via Open-Meteo. They describe typical lowland weather in each county; hills and exposed coasts are wetter and windier.