Watermelon · Erciş, Van, Turkey
When to plant watermelons in Erciş
Main outdoor window
24 Jun - 15 Jul
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
17 April
In Erciş, on your chosen risk.
Ready to pick
1 Aug - 30 Sep
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Erciş
Download these planting dates (.ics)
Import into Apple Calendar, Google Calendar or Outlook. Dates use the selected risk level and are planning estimates, not frost alerts.
Each window is a planning range. Check the forecast, soil and cultivar before planting; a later date is not automatically safer in hot or wet conditions.
Start indoors
13 Mar - 3 Apr
Five weeks before your last frost, under cover or on a windowsill.
Plant out
24 Jun - 15 Jul
Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 1 May. Measure your soil before planting.
Harvest
1 Aug - 30 Sep
Watermelons through the year
Against the frost risk in Erciş
Seasonal context
Rainfall and the growing season in Erciş
April has the highest average precipitation (66 mm); August has the lowest (8 mm). Compare this pattern with the planting windows and your water supply.
During wetter months, check that beds and containers drain after heavy rain. During drier months, plan how you will keep seeds and new transplants watered. Monthly averages can hide long dry spells and intense storms; they do not show soil moisture, humidity or this week's weather.
Source: NASA POWER, corrected MERRA-2 precipitation, 2001–2020. Values are approximate monthly totals, including the water equivalent of snow, from the nearest 0.5° × 0.625° grid cell. This reference period differs from the temperature record. Rainfall provides context and does not change the calculated planting dates. Method and limitations.
Monthly growing conditions in Erciş
Compare the planting window with the local temperature pattern. These are historical monthly averages, not this year's forecast or measured soil temperatures. Average frost days do not tell you whether a particular night will freeze.
| Month | Average low | Average high | Frost days |
|---|---|---|---|
| January | -10.4°C (13.4°F)13.4°F (-10.4°C) | -0.6°C (31°F)31°F (-0.6°C) | 30.8 |
| February | -7.1°C (19.3°F)19.3°F (-7.1°C) | 1.5°C (34.6°F)34.6°F (1.5°C) | 27.2 |
| March | -1.4°C (29.4°F)29.4°F (-1.4°C) | 6.5°C (43.8°F)43.8°F (6.5°C) | 20.7 |
| April | 3.3°C (37.9°F)37.9°F (3.3°C) | 12.6°C (54.7°F)54.7°F (12.6°C) | 4.6 |
| May | 8.2°C (46.8°F)46.8°F (8.2°C) | 17.9°C (64.2°F)64.2°F (17.9°C) | 0.1 |
| June | 13°C (55.4°F)55.4°F (13°C) | 24.8°C (76.7°F)76.7°F (24.8°C) | 0.0 |
| July | 16.3°C (61.3°F)61.3°F (16.3°C) | 29.8°C (85.7°F)85.7°F (29.8°C) | 0.0 |
| August | 16.9°C (62.5°F)62.5°F (16.9°C) | 30.1°C (86.1°F)86.1°F (30.1°C) | 0.0 |
| September | 12.8°C (55.1°F)55.1°F (12.8°C) | 24.3°C (75.7°F)75.7°F (24.3°C) | 0.0 |
| October | 6.8°C (44.2°F)44.2°F (6.8°C) | 16.5°C (61.8°F)61.8°F (16.5°C) | 1.1 |
| November | 0°C (32°F)32°F (0°C) | 8.6°C (47.5°F)47.5°F (8.6°C) | 13.4 |
| December | -6.4°C (20.6°F)20.6°F (-6.4°C) | 2.3°C (36.1°F)36.1°F (2.3°C) | 29.3 |
For watermelons, also check drainage, sunlight and cultivar requirements. See the rainfall context above; humidity, irrigation and local pest pressure are not calculated.
Local growing check
Before choosing watermelons for Erciş
- April is the wettest month in the rainfall grid, averaging about 66 mm. Check how your own bed drains and plan watering around actual soil moisture; monthly rain totals are not an irrigation schedule.
The temperature and rainfall tables on this page show the underlying climate estimates. How these suitability checks work · Record what happens in your garden.
Before you plant watermelons
Use the calendar to plan ahead, then check the conditions in your own garden.
- Measure the soil at sowing depth. Aim for at least 21°C (69.8°F); the calendar estimates soil warmth from air temperatures and cannot measure your bed.
- Check the local overnight forecast before planting out. Delay planting or keep protection ready if frost is forecast, even after the historical last-frost date.
- Harden off plants raised indoors: gradually expose them to outdoor light, wind and temperature before their final move into the bed.
- Use the maturity range on your seed packet when choosing a variety. Cold, short days and transplant stress can make harvest later than the calendar estimate.
Warmth, space and successful pollination
Check the mature vine size before allocating space. Even small-fruited varieties are not necessarily small plants, and the fruit’s eventual weight matters if growing vertically.
Keep soil moist but not waterlogged. Heat stress, excessive water and poor pollination can all reduce fruit set, so healthy leaves do not by themselves promise a crop.
Cold rainy weather can interfere with pollination. Inspect flowers and developing fruit, and use the variety’s ripeness indicators before harvesting; immature fruit will not gain sweetness merely by being picked.
Further reading: NC State Extension Plant Toolbox: watermelon . General crop guidance; local dates on this site are calculated separately. Source checked 18 September 2026 by Safe to Plant; this is not an expert review.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Check the mature vine size before allocating space. Even small-fruited varieties are not necessarily small plants, and the fruit’s eventual weight matters if growing vertically.
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.
This calendar uses frost-relative offsets as a starting point. Watermelons are timed from 5 weeks before that frost for an indoor start, with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Erciş.
The calendar also applies a soil-warming estimate derived from historical air temperatures. Where that estimate is later than the frost-based date, it delays the window. Soil in your own garden can warm earlier or later; a thermometer at sowing depth is a better final check. Cold, wet conditions can slow germination and increase decay risk.
The median frost-free season here is 199 days, against 80 to 110 days to maturity for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Also in Erciş
Other vegetables to time
Growing watermelons in Erciş
Can I grow watermelons in Erciş?
The calendar estimates a planting window, not a guarantee of success. April is the wettest month in the rainfall grid, averaging about 66 mm. Check how your own bed drains and plan watering around actual soil moisture; monthly rain totals are not an irrigation schedule.
When should I plant watermelons in Erciş?
Aim for 24 Jun - 15 Jul in an average year. If you would rather not gamble on the weather, wait until 24 Jun - 15 Jul - by then frost has finished in nine years out of ten.
Can I plant watermelons earlier in Erciş?
The historical frost estimate is 1 May. For Watermelons, an air-temperature model estimates soil warmth of about 21°C (69.8°F) around 24 Jun. This is not a soil measurement or a forecast. Check your bed at sowing depth; cold, wet conditions can slow growth and increase decay risk.
When might watermelons be ready to harvest in Erciş?
The estimated period is 1 Aug - 30 Sep, based on 80 to 110 days from the modeled planting date. Cultivar, planting material and growing conditions can change this interval; check the plant as well as the calendar.
How much frost will watermelons tolerate?
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.