Compare Irish counties
Pick two or three counties to see their rainfall, sunshine and temperatures side by side, month by month.
Derry gets 13% more rain a year than Antrim (1186 mm against 1047 mm), with 31 more rain days and 382 fewer hours of sunshine. July afternoons average 18°C in Derry and 19°C in Antrim; January nights 3°C and 2°C.
Rainfall by month
0 50 100 Derry, Jan: 92 mm Derry, Feb: 96 mm Derry, Mar: 79 mm Derry, Apr: 89 mm Derry, May: 85 mm Derry, Jun: 86 mm Derry, Jul: 103 mm Derry, Aug: 110 mm Derry, Sep: 104 mm Derry, Oct: 125 mm Derry, Nov: 93 mm Derry, Dec: 124 mm Antrim, Jan: 62 mm Antrim, Feb: 78 mm Antrim, Mar: 75 mm Antrim, Apr: 72 mm Antrim, May: 80 mm Antrim, Jun: 82 mm Antrim, Jul: 90 mm Antrim, Aug: 96 mm Antrim, Sep: 110 mm Antrim, Oct: 117 mm Antrim, Nov: 81 mm Antrim, Dec: 104 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 Derry, Jan: 7 °C Derry, Feb: 9 °C Derry, Mar: 10 °C Derry, Apr: 12 °C Derry, May: 15 °C Derry, Jun: 17 °C Derry, Jul: 18 °C Derry, Aug: 18 °C Derry, Sep: 16 °C Derry, Oct: 13 °C Derry, Nov: 10 °C Derry, Dec: 8 °C Antrim, Jan: 7 °C Antrim, Feb: 9 °C Antrim, Mar: 10 °C Antrim, Apr: 12 °C Antrim, May: 15 °C Antrim, Jun: 18 °C Antrim, Jul: 19 °C Antrim, Aug: 19 °C Antrim, Sep: 16 °C Antrim, Oct: 14 °C Antrim, Nov: 10 °C Antrim, 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 5.0 10.0 Derry, Jan: 3.4 hours a day Derry, Feb: 4.2 hours a day Derry, Mar: 5.9 hours a day Derry, Apr: 8.4 hours a day Derry, May: 9.3 hours a day Derry, Jun: 8.8 hours a day Derry, Jul: 7.7 hours a day Derry, Aug: 8.7 hours a day Derry, Sep: 6.9 hours a day Derry, Oct: 4.5 hours a day Derry, Nov: 3.6 hours a day Derry, Dec: 2.6 hours a day Antrim, Jan: 4.0 hours a day Antrim, Feb: 4.6 hours a day Antrim, Mar: 6.7 hours a day Antrim, Apr: 9.2 hours a day Antrim, May: 10.8 hours a day Antrim, Jun: 11.1 hours a day Antrim, Jul: 10.1 hours a day Antrim, Aug: 10.0 hours a day Antrim, Sep: 7.7 hours a day Antrim, Oct: 5.1 hours a day Antrim, Nov: 4.3 hours a day Antrim, 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 Derry, Jan: 15 days Derry, Feb: 17 days Derry, Mar: 15 days Derry, Apr: 16 days Derry, May: 16 days Derry, Jun: 18 days Derry, Jul: 19 days Derry, Aug: 19 days Derry, Sep: 16 days Derry, Oct: 19 days Derry, Nov: 17 days Derry, Dec: 18 days Antrim, Jan: 11 days Antrim, Feb: 13 days Antrim, Mar: 15 days Antrim, Apr: 14 days Antrim, May: 14 days Antrim, Jun: 15 days Antrim, Jul: 17 days Antrim, Aug: 18 days Antrim, Sep: 14 days Antrim, Oct: 16 days Antrim, Nov: 14 days Antrim, 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.