Siskiyou County Airport (SIY) 15 Day Weather Forecast, Montague United States
Current weather conditions and 15 day weather forecast for Siskiyou County Airport in Montague, 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 SIY
| 05 December 2025 Fri 2.2 ° C ( 36°F )  Sunny |
Feels Like : 1.6 ° C / 34.9°F Humidity : % 92 Pressure : 1024 mb Wind Speed : 3.6 kmph / 2.2 miles from SW 
Visibility : 13 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15-day weather forecast for Siskiyou County Airport, Montague, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 05 December 2025 Fri |  Partly Cloudy |
1.6 ° C | 11.1 ° C | 6 ° C | % 74 | 6.1 km/h | 0% |
| 06 December 2025 Sat |  Mist |
2.1 ° C | 7.3 ° C | 5.8 ° C | % 82 | 5 km/h | 0% |
| 07 December 2025 Sun |  Cloudy |
-0.5 ° C | 8.8 ° C | 4.8 ° C | % 77 | 6.1 km/h | 0% |
| 08 December 2025 Mon | Partly Cloudy |
2.8 ° C | 8.6 ° C | 5.9 ° C | % 80 | 4.7 km/h | 0% |
| 09 December 2025 Tue |  Patchy rain nearby |
7.8 ° C | 10.7 ° C | 9.6 ° C | % 80 | 9 km/h | 89% |
| 10 December 2025 Wed | Patchy rain nearby |
4.2 ° C | 12.3 ° C | 9.1 ° C | % 74 | 17.3 km/h | 72% |
| 11 December 2025 Thu | Patchy rain nearby |
4.6 ° C | 6.9 ° C | 6.5 ° C | % 83 | 9.4 km/h | 83% |
| 12 December 2025 Fri | Patchy rain nearby |
7.7 ° C | 10.1 ° C | 9.2 ° C | % 81 | 25.2 km/h | 86% |
| 13 December 2025 Sat | Patchy rain nearby |
0.1 ° C | 4.6 ° C | 3.5 ° C | % 82 | 17.3 km/h | 86% |
| 14 December 2025 Sun |  Moderate or heavy snow in area with thunder |
-2.3 ° C | 2.2 ° C | -0.5 ° C | % 82 | 15.1 km/h | 79% |
| 15 December 2025 Mon |  Heavy snow |
-3.9 ° C | 0.1 ° C | -1.7 ° C | % 92 | 5 km/h | 72% |
| 16 December 2025 Tue |  Moderate or heavy snow showers |
-9.5 ° C | 1.4 ° C | -4.6 ° C | % 89 | 26.3 km/h | 81% |
| 17 December 2025 Wed | Moderate or heavy snow showers |
-8.6 ° C | -2.5 ° C | -4.9 ° C | % 92 | 8.3 km/h | 64% |
| 18 December 2025 Thu | Heavy snow |
-2.8 ° C | -1 ° C | -1.8 ° C | % 96 | 16.2 km/h | 86% |
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