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The average temperature in Hoorn over the whole year is 11°C. August is the hottest month, with highs of about 21°C; February is the coldest, with lows of about 4°C. The rainy (wet) season in Hoorn runs from October to February, peaking in November with a 32% chance of rain on a given day. The dry season is March to September; May is the driest month, at 15%. Winds in Hoorn are highest in February, averaging 6.6 m/s (24 km/h), and lightest in September, at 4.7 m/s (17 km/h). The prevailing wind is from the SW. The clearest skies in Hoorn come in August, when the sky is typically 56% covered; December is the cloudiest month, at 79%.
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 6°C | 4°C | -0°C | 28% | 76% | 6.4 m/s | 0 | 0 | 5 |
| February | 7°C | 4°C | 1°C | 27% | 69% | 6.6 m/s | 0 | 0 | 12 |
| March | 9°C | 4°C | 3°C | 21% | 63% | 5.8 m/s | 2 | 0 | 25 |
| April | 12°C | 7°C | 7°C | 19% | 59% | 5.3 m/s | 9 | 0 | 51 |
| May | 16°C | 11°C | 12°C | 15% | 57% | 5.0 m/s | 35 | 1 | 77 |
| June | 19°C | 14°C | 17°C | 16% | 57% | 5.0 m/s | 64 | 8 | 77 |
| July | 21°C | 16°C | 18°C | 18% | 59% | 4.9 m/s | 71 | 9 | 75 |
| August | 21°C | 16°C | 19°C | 18% | 56% | 4.8 m/s | 73 | 13 | 71 |
| September | 19°C | 14°C | 16°C | 23% | 59% | 4.7 m/s | 59 | 6 | 78 |
| October | 14°C | 11°C | 10°C | 28% | 68% | 5.7 m/s | 15 | 0 | 71 |
| November | 9°C | 7°C | 4°C | 32% | 71% | 5.8 m/s | 0 | 0 | 32 |
| December | 7°C | 5°C | 1°C | 30% | 79% | 6.2 m/s | 0 | 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, Hoorn has days of about 6°C at their warmest in January, its coolest month, and 21°C in August, its warmest; the coolest hours of the day run from 4°C to 16°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around November and least likely around May. 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 Hoorn has typical daily highs of about 6°C and lows of about 4°C, with a 28% chance of rain on a given day.
Spring in Hoorn has typical daily highs of about 12°C and lows of about 7°C, with a 18% chance of rain on a given day.
Summer in Hoorn has typical daily highs of about 20°C and lows of about 15°C, with a 17% chance of rain on a given day.
Autumn in Hoorn has typical daily highs of about 14°C and lows of about 10°C, with a 27% chance of rain on a given day.
The rainy (wet) season in Hoorn runs from October to February, peaking in November with a 32% chance of rain on a given day. The dry season is March to September; May is the driest month, at 15%.
Winds in Hoorn are highest in February, averaging 6.6 m/s (24 km/h), and lightest in September, at 4.7 m/s (17 km/h). The prevailing wind is from the SW.
The average temperature in Hoorn over the whole year is 11°C. August is the hottest month, with highs of about 21°C; February is the coldest, with lows of about 4°C.