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The average temperature in Aš over the whole year is 9°C. August is the hottest month, with highs of about 22°C; January is the coldest, with lows of about -1°C. Aš has no sharply defined rainy season: the chance of rain on a given day runs from 17% in April, the driest month, to 33% in December, the wettest. Winds in Aš are highest in January, averaging 3.4 m/s (12 km/h), and lightest in September, at 2.2 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Aš come in June, when the sky is typically 53% covered; December is the cloudiest month, at 81%.
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 1°C | -1°C | -4°C | 32% | 78% | 3.4 m/s | 0 | 0 | 2 |
| February | 3°C | -0°C | -2°C | 28% | 70% | 3.4 m/s | 0 | 0 | 8 |
| March | 7°C | 1°C | 2°C | 24% | 63% | 3.0 m/s | 1 | 0 | 24 |
| April | 12°C | 4°C | 7°C | 17% | 60% | 2.8 m/s | 16 | 0 | 50 |
| May | 16°C | 9°C | 13°C | 20% | 59% | 2.7 m/s | 37 | 2 | 73 |
| June | 21°C | 14°C | 19°C | 19% | 53% | 2.4 m/s | 73 | 16 | 67 |
| July | 22°C | 15°C | 20°C | 19% | 56% | 2.5 m/s | 73 | 19 | 64 |
| August | 22°C | 14°C | 21°C | 21% | 53% | 2.3 m/s | 69 | 25 | 58 |
| September | 18°C | 10°C | 16°C | 22% | 57% | 2.2 m/s | 52 | 8 | 72 |
| October | 12°C | 7°C | 9°C | 24% | 69% | 2.6 m/s | 16 | 0 | 62 |
| November | 5°C | 3°C | 1°C | 24% | 77% | 2.7 m/s | 0 | 0 | 17 |
| December | 2°C | 1°C | -2°C | 33% | 81% | 3.2 m/s | 0 | 0 | 3 |
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, Aš has days of about 1°C at their warmest in January, its coolest month, and 22°C in August, its warmest; the coolest hours of the day run from -1°C to 15°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around December and least likely around April. 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 Aš has typical daily highs of about 2°C and lows of about -0°C, with a 31% chance of rain on a given day.
Spring in Aš has typical daily highs of about 11°C and lows of about 5°C, with a 20% chance of rain on a given day.
Summer in Aš has typical daily highs of about 22°C and lows of about 14°C, with a 20% chance of rain on a given day.
Autumn in Aš has typical daily highs of about 12°C and lows of about 7°C, with a 23% chance of rain on a given day.
Aš has no sharply defined rainy season: the chance of rain on a given day runs from 17% in April, the driest month, to 33% in December, the wettest.
Winds in Aš are highest in January, averaging 3.4 m/s (12 km/h), and lightest in September, at 2.2 m/s (8 km/h). The prevailing wind is from the W.
The average temperature in Aš over the whole year is 9°C. August is the hottest month, with highs of about 22°C; January is the coldest, with lows of about -1°C.