GreenlyWarsaw: frost dates
Poland
In Warsaw the last spring frost usually comes around 8 April and the first autumn frost around 17 November, which leaves about 223 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 12 May.
| Last spring frost | around 8 April |
|---|---|
| First autumn frost | around 17 November |
| Frost-free days | 223 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 | 13 February | 25 March | 15 April |
| Arugula | — | 25 February | sow 18 March |
| Basil | 8 April | 16 May | 6 June |
| Beet | — | 25 February | sow 18 March |
| Bell Pepper | 3 March | 16 May | 6 June |
| Black-eyed Susan | 12 February | — | 15 April |
| Bok Choy | 18 February | 25 March | 15 April |
| Broad bean | — | 25 February | sow 18 March |
| Broccoli | — | 25 February | sow 18 March |
| Brussels Sprouts | 11 January | 25 February | 18 March |
| Cabbage | — | 25 February | sow 18 March |
| Calendula | — | 25 February | sow 18 March |
| Carrot | — | — | sow 18 March |
| Cauliflower | 14 January | 25 February | 18 March |
| Celeriac | 7 January | 25 March | 15 April |
| Celery | 7 January | 25 March | 15 April |
| Celosia | 17 March | 1 May | 22 May |
| Chamomile | — | 25 February | sow 18 March |
| Chayote | 14 January | 12 April | 3 May |
| Chickpea | — | — | sow 18 March |
| Chili Pepper | 6 March | 19 May | 9 June |
| China aster | 25 March | 16 May | 6 June |
| Chives | — | — | sow 18 March |
| Cilantro | — | 25 February | sow 18 March |
| Corn | — | 12 April | sow 3 May |
| Cosmos | 17 March | 1 May | 22 May |
| Cucumber | 4 April | 16 May | 6 June |
| Daikon | — | 25 February | sow 18 March |
| Delphinium | 18 January | — | 18 March |
| Dill | — | 25 February | sow 18 March |
| Eggplant | 7 March | 16 May | 6 June |
| Florence fennel | 8 February | 25 March | 15 April |
| Garden sorrel | — | 25 February | sow 18 March |
| Green Beans | 6 March | 12 April | 3 May |
| Hyssop | — | — | sow 18 March |
| Kale | — | 25 February | sow 18 March |
| Kiwano | 20 March | 21 April | 12 May |
| Kohlrabi | — | 25 February | sow 18 March |
| Leek | 17 December | 25 February | 18 March |
| Lemon balm | — | 25 February | sow 18 March |
| Lettuce | — | 25 February | sow 18 March |
| Lisianthus | 30 November | 25 February | 18 March |
| Lovage | — | — | sow 18 March |
| Luffa | 4 April | 16 May | 6 June |
| Marigold | 11 February | 25 March | 15 April |
| Melon | 25 March | 16 May | 6 June |
| Microgreens | — | 1 May | sow 22 May |
| Moringa | 25 March | 19 May | 9 June |
| Mustard greens | — | 25 February | sow 18 March |
| Napa cabbage | 20 February | 25 March | 15 April |
| Nasturtium | 15 February | 25 March | 15 April |
| Okra | 4 April | 16 May | 6 June |
| Oregano | 27 December | 25 February | 18 March |
| Pansy | 31 December | 25 February | 18 March |
| Parsley | — | 25 February | sow 18 March |
| Parsnip | — | — | sow 18 March |
| Peanut | 9 April | 16 May | 6 June |
| Peas | — | 25 February | sow 18 March |
| Petunia | 14 March | 16 May | 6 June |
| Physalis | 7 March | 21 April | 12 May |
| Pumpkin | 15 March | 21 April | 12 May |
| Purple coneflower | 15 January | — | 18 March |
| Radish | — | — | sow 18 March |
| Sage | 7 January | 25 February | 18 March |
| Snapdragon | 22 December | 25 February | 18 March |
| Spinach | — | 25 February | sow 18 March |
| Stevia | 3 March | 21 April | 12 May |
| Stock | — | 25 February | sow 18 March |
| Sunflower | — | 1 May | sow 22 May |
| Sweet Corn | — | 12 April | sow 3 May |
| Sweet pea | 14 January | 25 February | 18 March |
| Sweet William | — | — | sow 18 March |
| Swiss Chard | — | 25 February | sow 18 March |
| Thyme | — | 25 February | sow 18 March |
| Tomato | 23 February | 21 April | 12 May |
| Turnip | — | 25 February | sow 18 March |
| Watercress | — | 25 February | sow 18 March |
| Watermelon | 14 April | 16 May | 6 June |
| Zinnia | 14 April | 19 May | 9 June |
| Zucchini | 20 March | 21 April | 12 May |
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.
Warsaw: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in Warsaw by month
Average weather in Warsaw over 2016–2025: the warmest month is August, the wettest July.
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 2.1 | -2.8 | 49 | 13 |
| February | 4.4 | -1.7 | 49 | 11 |
| March | 8.8 | 0.3 | 38 | 10 |
| April | 14.3 | 4.4 | 46 | 10 |
| May | 19.2 | 8.9 | 71 | 12 |
| June | 24.4 | 14.1 | 69 | 11 |
| July | 24.8 | 15.4 | 88 | 14 |
| August | 24.9 | 15.2 | 79 | 12 |
| September | 20.3 | 11.3 | 59 | 10 |
| October | 13.8 | 6.8 | 68 | 13 |
| November | 7 | 2.4 | 42 | 9 |
| December | 3.6 | -0.5 | 54 | 12 |
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 | 18 October |
| Crocus | 18 October |
| Daffodil | 18 October |
| Garlic | 18 October |
| Hyacinth | 18 October |
| Lily | 18 October |
| Peony | 18 October |
| Saffron | 18 October |
| Tulip | 18 October |
| Wild garlic | 18 October |
A month before the first autumn frost, so the roots grow before winter.