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The average temperature in Qal‘ah-ye Zāl over the whole year is 19°C. July is the hottest month, with highs of about 38°C; January is the coldest, with lows of about 1°C. The rainy (wet) season in Qal‘ah-ye Zāl runs from November to May, peaking in February with a 63% chance of rain on a given day. The dry season is June to October; August is the driest month, at 1%. Winds in Qal‘ah-ye Zāl are highest in May, averaging 2.5 m/s (9 km/h), and lightest in January, at 1.7 m/s (6 km/h). The prevailing wind is from the NW. The clearest skies in Qal‘ah-ye Zāl come in September, when the sky is typically 15% covered; February is the cloudiest month, at 72%.
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 8°C | 1°C | 2°C | 53% | 68% | 1.7 m/s | 1 | 0 | 23 |
| February | 12°C | 6°C | 7°C | 63% | 72% | 2.2 m/s | 7 | 0 | 50 |
| March | 20°C | 11°C | 15°C | 51% | 65% | 2.1 m/s | 55 | 3 | 76 |
| April | 25°C | 15°C | 20°C | 50% | 59% | 2.4 m/s | 64 | 25 | 54 |
| May | 31°C | 19°C | 27°C | 35% | 47% | 2.5 m/s | 41 | 58 | 19 |
| June | 37°C | 23°C | 33°C | 16% | 27% | 2.3 m/s | 10 | 45 | 2 |
| July | 38°C | 24°C | 34°C | 10% | 19% | 2.0 m/s | 3 | 37 | 0 |
| August | 35°C | 22°C | 31°C | 1% | 15% | 2.0 m/s | 15 | 65 | 2 |
| September | 31°C | 17°C | 26°C | 11% | 15% | 1.8 m/s | 58 | 66 | 20 |
| October | 23°C | 11°C | 18°C | 32% | 37% | 1.8 m/s | 70 | 10 | 74 |
| November | 14°C | 8°C | 10°C | 50% | 58% | 1.8 m/s | 23 | 1 | 64 |
| December | 9°C | 3°C | 4°C | 43% | 56% | 1.7 m/s | 2 | 0 | 33 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Year round, Qal‘ah-ye Zāl has days of about 8°C at their warmest in January, its coolest month, and 38°C in July, its warmest; the coolest hours of the day run from 1°C to 24°C through the year, and the average temperature over the year is 19°C around the clock. Rain is most likely around February and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Winter in Qal‘ah-ye Zāl has typical daily highs of about 10°C and lows of about 3°C, with a 53% chance of rain on a given day.
Spring in Qal‘ah-ye Zāl has typical daily highs of about 25°C and lows of about 15°C, with a 45% chance of rain on a given day.
Summer in Qal‘ah-ye Zāl has typical daily highs of about 37°C and lows of about 23°C, with a 9% chance of rain on a given day.
Autumn in Qal‘ah-ye Zāl has typical daily highs of about 22°C and lows of about 12°C, with a 31% chance of rain on a given day.
The rainy (wet) season in Qal‘ah-ye Zāl runs from November to May, peaking in February with a 63% chance of rain on a given day. The dry season is June to October; August is the driest month, at 1%.
Winds in Qal‘ah-ye Zāl are highest in May, averaging 2.5 m/s (9 km/h), and lightest in January, at 1.7 m/s (6 km/h). The prevailing wind is from the NW.
The average temperature in Qal‘ah-ye Zāl over the whole year is 19°C. July is the hottest month, with highs of about 38°C; January is the coldest, with lows of about 1°C.