Portland Hillsboro Airport (HIO) 15 Day Weather Forecast, Hillsboro United States
Current weather conditions and 15 day weather forecast for Portland Hillsboro Airport in Hillsboro, United States including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at HIO
| 16 December 2025 Tue 11.7 ° C ( 53.1°F )  Light rain |
Feels Like : 12.1 ° C / 53.8°F Humidity : % 93 Pressure : 1018 mb Wind Speed : 3.6 kmph / 2.2 miles from S 
Visibility : 16 km Precipitation (rainfall) : 0.11 mm Cloud (%) : 100 |
15-day weather forecast for Portland Hillsboro Airport, Hillsboro, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 16 December 2025 Tue |  Moderate rain |
11.1 ° C | 14.3 ° C | 12.2 ° C | % 90 | 27.4 km/h | 90% |
| 17 December 2025 Wed |  Heavy rain |
5 ° C | 7.6 ° C | 6.8 ° C | % 87 | 34.2 km/h | 89% |
| 18 December 2025 Thu | Heavy rain |
3.4 ° C | 12.8 ° C | 7.4 ° C | % 96 | 16.6 km/h | 89% |
| 19 December 2025 Fri | Heavy rain |
3 ° C | 8.3 ° C | 6.5 ° C | % 93 | 8.6 km/h | 88% |
| 20 December 2025 Sat |  Patchy rain nearby |
2.8 ° C | 5.6 ° C | 4.1 ° C | % 92 | 9.7 km/h | 84% |
| 21 December 2025 Sun | Patchy rain nearby |
1.4 ° C | 7.8 ° C | 3.6 ° C | % 89 | 36.4 km/h | 86% |
| 22 December 2025 Mon | Patchy rain nearby |
3.7 ° C | 6.5 ° C | 4.8 ° C | % 85 | 20.2 km/h | 82% |
| 23 December 2025 Tue | Patchy rain nearby |
2.4 ° C | 4.9 ° C | 3.1 ° C | % 91 | 8.3 km/h | 86% |
| 24 December 2025 Wed | Patchy rain nearby |
2.4 ° C | 7.1 ° C | 4.6 ° C | % 89 | 15.1 km/h | 71% |
| 25 December 2025 Thu | Moderate rain |
2 ° C | 5.9 ° C | 4.6 ° C | % 93 | 23 km/h | 87% |
| 26 December 2025 Fri | Moderate rain |
1.2 ° C | 4.9 ° C | 3.5 ° C | % 93 | 20.5 km/h | 89% |
| 27 December 2025 Sat | Moderate rain |
5.4 ° C | 7 ° C | 7.2 ° C | % 88 | 27.7 km/h | 85% |
| 28 December 2025 Sun | Heavy rain |
8.3 ° C | 11.7 ° C | 10.1 ° C | % 94 | 28.4 km/h | 88% |
| 29 December 2025 Mon | Patchy rain nearby |
3.6 ° C | 7.7 ° C | 7.2 ° C | % 83 | 11.9 km/h | 88% |
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