GreenlyDublin: frost dates
Ireland
In Dublin the last spring frost usually comes around 7 April and the first autumn frost around 24 November, which leaves about 231 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 12 June.
| Last spring frost | around 7 April |
|---|---|
| First autumn frost | around 24 November |
| Frost-free days | 231 days |
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
When to sow and plant
| Crop | Sow for seedlings | Plant out in a greenhouse | Open ground |
|---|---|---|---|
| Achocha | 3 March | 12 April | 3 May |
| Arugula | — | 24 February | sow 17 March |
| Basil | 18 May | 25 June | 16 July |
| Beet | — | 24 February | sow 17 March |
| Bell Pepper | 12 April | 25 June | 16 July |
| Black-eyed Susan | 2 March | — | 3 May |
| Bok Choy | 8 March | 12 April | 3 May |
| Broad bean | — | 24 February | sow 17 March |
| Broccoli | — | 24 February | sow 17 March |
| Brussels Sprouts | 10 January | 24 February | 17 March |
| Cabbage | — | 24 February | sow 17 March |
| Calendula | — | 24 February | sow 17 March |
| Carrot | — | — | sow 17 March |
| Cauliflower | 13 January | 24 February | 17 March |
| Celeriac | 25 January | 12 April | 3 May |
| Celery | 25 January | 12 April | 3 May |
| Celosia | 14 April | 29 May | 19 June |
| Chamomile | — | 24 February | sow 17 March |
| Chayote | 23 January | 21 April | 12 May |
| Chickpea | — | — | sow 17 March |
| Chili Pepper | 18 April | 1 July | 22 July |
| China aster | 4 May | 25 June | 16 July |
| Chives | — | — | sow 17 March |
| Cilantro | — | 24 February | sow 17 March |
| Corn | — | 21 April | sow 12 May |
| Cosmos | 14 April | 29 May | 19 June |
| Cucumber | 14 May | 25 June | 16 July |
| Daikon | — | 24 February | sow 17 March |
| Delphinium | 17 January | — | 17 March |
| Dill | — | 24 February | sow 17 March |
| Eggplant | 16 April | 25 June | 16 July |
| Florence fennel | 26 February | 12 April | 3 May |
| Garden sorrel | — | 24 February | sow 17 March |
| Green Beans | 15 March | 21 April | 12 May |
| Hyssop | — | — | sow 17 March |
| Kale | — | 24 February | sow 17 March |
| Kiwano | 20 April | 22 May | 12 June |
| Kohlrabi | — | 24 February | sow 17 March |
| Leek | 16 December | 24 February | 17 March |
| Lemon balm | — | 24 February | sow 17 March |
| Lettuce | — | 24 February | sow 17 March |
| Lisianthus | 29 November | 24 February | 17 March |
| Lovage | — | — | sow 17 March |
| Luffa | 14 May | 25 June | 16 July |
| Marigold | 1 March | 12 April | 3 May |
| Melon | 4 May | 25 June | 16 July |
| Microgreens | — | 29 May | sow 19 June |
| Moringa | 7 May | 1 July | 22 July |
| Mustard greens | — | 24 February | sow 17 March |
| Napa cabbage | 10 March | 12 April | 3 May |
| Nasturtium | 5 March | 12 April | 3 May |
| Okra | 14 May | 25 June | 16 July |
| Oregano | 26 December | 24 February | 17 March |
| Pansy | 30 December | 24 February | 17 March |
| Parsley | — | 24 February | sow 17 March |
| Parsnip | — | — | sow 17 March |
| Peanut | 19 May | 25 June | 16 July |
| Peas | — | 24 February | sow 17 March |
| Petunia | 23 April | 25 June | 16 July |
| Physalis | 7 April | 22 May | 12 June |
| Pumpkin | 15 April | 22 May | 12 June |
| Purple coneflower | 14 January | — | 17 March |
| Radish | — | — | sow 17 March |
| Sage | 6 January | 24 February | 17 March |
| Snapdragon | 21 December | 24 February | 17 March |
| Spinach | — | 24 February | sow 17 March |
| Stevia | 3 April | 22 May | 12 June |
| Stock | — | 24 February | sow 17 March |
| Sunflower | — | 29 May | sow 19 June |
| Sweet Corn | — | 21 April | sow 12 May |
| Sweet pea | 13 January | 24 February | 17 March |
| Sweet William | — | — | sow 17 March |
| Swiss Chard | — | 24 February | sow 17 March |
| Thyme | — | 24 February | sow 17 March |
| Tomato | 26 March | 22 May | 12 June |
| Turnip | — | 24 February | sow 17 March |
| Watercress | — | 24 February | sow 17 March |
| Watermelon | 24 May | 25 June | 16 July |
| Zinnia | 27 May | 1 July | 22 July |
| Zucchini | 20 April | 22 May | 12 June |
Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day.
Dublin: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in Dublin by month
Average weather in Dublin over 2016–2025: the warmest month is July, the wettest October.
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 6.6 | 2.3 | 77 | 14 |
| February | 7.7 | 2.7 | 85 | 15 |
| March | 9 | 3 | 95 | 16 |
| April | 10.9 | 4.4 | 83 | 15 |
| May | 14.6 | 7.4 | 69 | 13 |
| June | 17 | 10.2 | 96 | 16 |
| July | 18.5 | 11.8 | 89 | 16 |
| August | 18 | 11.7 | 85 | 16 |
| September | 15.7 | 9.7 | 102 | 15 |
| October | 12.6 | 7.6 | 105 | 16 |
| November | 9 | 4.6 | 102 | 14 |
| December | 7.6 | 3.5 | 98 | 15 |
Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).
Planted in autumn
| Crop | Plant around |
|---|---|
| Bearded Iris | 25 October |
| Crocus | 25 October |
| Daffodil | 25 October |
| Garlic | 25 October |
| Hyacinth | 25 October |
| Lily | 25 October |
| Peony | 25 October |
| Saffron | 25 October |
| Tulip | 25 October |
| Wild garlic | 25 October |
A month before the first autumn frost, so the roots grow before winter.