GreenlyLast and first frost dates in Portimão
Portugal
Portimão had no frost in 2016–2025, so crops are planted by warmth and rain rather than by frost dates.
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| Last spring frost | none in ten years |
|---|---|
| First autumn frost | none in ten years |
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.
There is no frost season here: crops are planted by warmth and rain rather than by frost dates.
When the soil warms up in Portimão
The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo).
| Soil | Date |
|---|---|
| 5 °C | already in the first week of January |
| 10 °C | already in the first week of January |
| 15 °C | 11 March |
| 18 °C | 17 April |
Frost dates near Portimão
Of the nearest cities on our list, the last spring frost ends earliest in Évora (12 January) and latest in Beja (6 February).
Portimão: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in Portimão by month
Average weather in Portimão over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: April–October (20.7–32.6 °C). Months that average 30 °C or more by day: July (31.9 °C) and August (32.6 °C). No month averages below 0 °C at night; the coldest nights, in January, average 8.2 °C. About 502 mm of rain falls in a year, on 69 days; March is the wettest month (88 mm) and July the driest (1 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 16.1 | 8.2 | 55 | 6 |
| February | 17.3 | 9 | 51 | 7 |
| March | 18.4 | 9.7 | 88 | 11 |
| April | 20.7 | 11.5 | 52 | 10 |
| May | 24.8 | 14.1 | 30 | 5 |
| June | 28.1 | 16.6 | 11 | 3 |
| July | 31.9 | 18.6 | 1 | 0 |
| August | 32.6 | 19.2 | 1 | 0 |
| September | 28.5 | 17.6 | 19 | 3 |
| October | 24.7 | 15.6 | 63 | 7 |
| November | 19.3 | 11.5 | 64 | 9 |
| December | 17 | 9.2 | 67 | 8 |
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).
