GreenlySaint Petersburg: frost dates
Russia
In Saint Petersburg the last spring frost usually comes around 1 May and the first autumn frost around 20 October, which leaves about 172 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 28 May.
| Last spring frost | around 1 May |
|---|---|
| First autumn frost | around 20 October |
| Frost-free days | 172 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 | 14 March | 23 April | 14 May |
| Arugula | — | 20 March | sow 10 April |
| Basil | 19 April | 27 May | 17 June |
| Beet | — | 20 March | sow 10 April |
| Bell Pepper | 14 March | 27 May | 17 June |
| Black-eyed Susan | 13 March | — | 14 May |
| Bok Choy | 19 March | 23 April | 14 May |
| Broad bean | — | 20 March | sow 10 April |
| Broccoli | — | 20 March | sow 10 April |
| Brussels Sprouts | 3 February | 20 March | 10 April |
| Cabbage | — | 20 March | sow 10 April |
| Calendula | — | 20 March | sow 10 April |
| Carrot | — | — | sow 10 April |
| Cauliflower | 6 February | 20 March | 10 April |
| Celeriac | 5 February | 23 April | 14 May |
| Celery | 5 February | 23 April | 14 May |
| Celosia | 1 April | 16 May | 6 June |
| Chamomile | — | 20 March | sow 10 April |
| Chayote | 29 January | 27 April | 18 May |
| Chickpea | — | — | sow 10 April |
| Chili Pepper | 16 March | 29 May | 19 June |
| China aster | 5 April | 27 May | 17 June |
| Chives | — | — | sow 10 April |
| Cilantro | — | 20 March | sow 10 April |
| Corn | — | 27 April | sow 18 May |
| Cosmos | 1 April | 16 May | 6 June |
| Cucumber | 15 April | 27 May | 17 June |
| Daikon | — | 20 March | sow 10 April |
| Delphinium | 10 February | — | 10 April |
| Dill | — | 20 March | sow 10 April |
| Eggplant | 18 March | 27 May | 17 June |
| Florence fennel | 9 March | 23 April | 14 May |
| Garden sorrel | — | 20 March | sow 10 April |
| Green Beans | 21 March | 27 April | 18 May |
| Hyssop | — | — | sow 10 April |
| Kale | — | 20 March | sow 10 April |
| Kiwano | 5 April | 7 May | 28 May |
| Kohlrabi | — | 20 March | sow 10 April |
| Leek | 9 January | 20 March | 10 April |
| Lemon balm | — | 20 March | sow 10 April |
| Lettuce | — | 20 March | sow 10 April |
| Lisianthus | 23 December | 20 March | 10 April |
| Lovage | — | — | sow 10 April |
| Luffa | 15 April | 27 May | 17 June |
| Marigold | 12 March | 23 April | 14 May |
| Melon | 5 April | 27 May | 17 June |
| Microgreens | — | 16 May | sow 6 June |
| Moringa | 4 April | 29 May | 19 June |
| Mustard greens | — | 20 March | sow 10 April |
| Napa cabbage | 21 March | 23 April | 14 May |
| Nasturtium | 16 March | 23 April | 14 May |
| Okra | 15 April | 27 May | 17 June |
| Oregano | 19 January | 20 March | 10 April |
| Pansy | 23 January | 20 March | 10 April |
| Parsley | — | 20 March | sow 10 April |
| Parsnip | — | — | sow 10 April |
| Peanut | 20 April | 27 May | 17 June |
| Peas | — | 20 March | sow 10 April |
| Petunia | 25 March | 27 May | 17 June |
| Physalis | 23 March | 7 May | 28 May |
| Pumpkin | 31 March | 7 May | 28 May |
| Purple coneflower | 7 February | — | 10 April |
| Radish | — | — | sow 10 April |
| Sage | 30 January | 20 March | 10 April |
| Snapdragon | 14 January | 20 March | 10 April |
| Spinach | — | 20 March | sow 10 April |
| Stevia | 19 March | 7 May | 28 May |
| Stock | — | 20 March | sow 10 April |
| Sunflower | — | 16 May | sow 6 June |
| Sweet Corn | — | 27 April | sow 18 May |
| Sweet pea | 6 February | 20 March | 10 April |
| Sweet William | — | — | sow 10 April |
| Swiss Chard | — | 20 March | sow 10 April |
| Thyme | — | 20 March | sow 10 April |
| Tomato | 11 March | 7 May | 28 May |
| Turnip | — | 20 March | sow 10 April |
| Watercress | — | 20 March | sow 10 April |
| Watermelon | 25 April | 27 May | 17 June |
| Zinnia | 24 April | 29 May | 19 June |
| Zucchini | 5 April | 7 May | 28 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.
Saint Petersburg: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in Saint Petersburg by month
Average weather in Saint Petersburg over 2016–2025: the warmest month is July, the wettest August.
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | -3 | -7.6 | 51 | 14 |
| February | -2.2 | -7.2 | 45 | 12 |
| March | 2.1 | -4.5 | 44 | 11 |
| April | 8.2 | -0.2 | 50 | 11 |
| May | 14.9 | 6.1 | 48 | 10 |
| June | 20.3 | 12.5 | 66 | 12 |
| July | 22.3 | 14.9 | 93 | 16 |
| August | 20.7 | 13.6 | 115 | 15 |
| September | 16 | 9.5 | 64 | 12 |
| October | 8.7 | 3.9 | 74 | 14 |
| November | 2.8 | -0.6 | 59 | 14 |
| December | -0.8 | -4.5 | 56 | 16 |
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 | 20 September |
| Crocus | 20 September |
| Daffodil | 20 September |
| Garlic | 20 September |
| Hyacinth | 20 September |
| Lily | 20 September |
| Peony | 20 September |
| Saffron | 20 September |
| Tulip | 20 September |
| Wild garlic | 20 September |
A month before the first autumn frost, so the roots grow before winter.