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The average temperature in Kaiyuan over the whole year is 15°C. June is the hottest month, with highs of about 31°C; January is the coldest, with lows of about -3°C. The rainy (wet) season in Kaiyuan runs from July to August, peaking in July with a 26% chance of rain on a given day. The dry season is September to June; December is the driest month, at 4%. Winds in Kaiyuan are highest in April, averaging 3.2 m/s (12 km/h), and lightest in October, at 2.2 m/s (8 km/h). The prevailing wind is from the NE. The clearest skies in Kaiyuan come in December, when the sky is typically 64% covered; July is the cloudiest month, at 79%.
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 3°C | -3°C | -2°C | 5% | 73% | 2.3 m/s | 0 | 0 | 4 |
| February | 7°C | -0°C | 1°C | 6% | 69% | 2.6 m/s | 1 | 0 | 18 |
| March | 14°C | 7°C | 9°C | 5% | 69% | 3.1 m/s | 20 | 0 | 62 |
| April | 20°C | 12°C | 16°C | 10% | 73% | 3.2 m/s | 57 | 9 | 74 |
| May | 25°C | 17°C | 23°C | 11% | 74% | 3.1 m/s | 71 | 36 | 48 |
| June | 31°C | 22°C | 29°C | 14% | 77% | 2.7 m/s | 32 | 64 | 9 |
| July | 30°C | 24°C | 32°C | 26% | 79% | 2.4 m/s | 14 | 47 | 3 |
| August | 29°C | 23°C | 31°C | 22% | 78% | 2.3 m/s | 21 | 47 | 7 |
| September | 25°C | 19°C | 25°C | 15% | 69% | 2.3 m/s | 64 | 52 | 31 |
| October | 18°C | 12°C | 16°C | 15% | 73% | 2.2 m/s | 59 | 3 | 81 |
| November | 11°C | 5°C | 7°C | 9% | 68% | 2.3 m/s | 12 | 0 | 54 |
| December | 4°C | -2°C | -1°C | 4% | 64% | 2.2 m/s | 1 | 0 | 11 |
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, Kaiyuan has days of about 3°C at their warmest in January, its coolest month, and 31°C in June, its warmest; the coolest hours of the day run from -3°C to 24°C through the year, and the average temperature over the year is 15°C around the clock. Rain is most likely around July and least likely around December. 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 Kaiyuan has typical daily highs of about 5°C and lows of about -2°C, with a 5% chance of rain on a given day.
Spring in Kaiyuan has typical daily highs of about 20°C and lows of about 12°C, with a 9% chance of rain on a given day.
Summer in Kaiyuan has typical daily highs of about 30°C and lows of about 23°C, with a 21% chance of rain on a given day.
Autumn in Kaiyuan has typical daily highs of about 18°C and lows of about 12°C, with a 13% chance of rain on a given day.
The rainy (wet) season in Kaiyuan runs from July to August, peaking in July with a 26% chance of rain on a given day. The dry season is September to June; December is the driest month, at 4%.
Winds in Kaiyuan are highest in April, averaging 3.2 m/s (12 km/h), and lightest in October, at 2.2 m/s (8 km/h). The prevailing wind is from the NE.
The average temperature in Kaiyuan over the whole year is 15°C. June is the hottest month, with highs of about 31°C; January is the coldest, with lows of about -3°C.