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
| 15 September 2026 Tue 24.1 ° C ( 75.5°F )  Sunny |
Feels Like : 20.9 ° C / 69.6°F Humidity : % 19 Pressure : 1011 mb Wind Speed : 5.8 kmph / 3.6 miles from WNW 
Visibility : 10 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 |
|---|---|---|---|---|---|---|---|
| 14 September 2026 Mon | Sunny |
4.6 ° C | 24.2 ° C | 12.9 ° C | % 56 | 10.4 km/h | 2% |
| 15 September 2026 Tue | Sunny |
6.5 ° C | 27.4 ° C | 15.1 ° C | % 45 | 26.3 km/h | 2% |
| 16 September 2026 Wed | Sunny |
7.1 ° C | 24.4 ° C | 15 ° C | % 57 | 16.6 km/h | 36% |
| 17 September 2026 Thu | Sunny |
7.8 ° C | 25.4 ° C | 15.1 ° C | % 59 | 21.6 km/h | 17% |
| 18 September 2026 Fri | Sunny |
8.6 ° C | 27.2 ° C | 16.6 ° C | % 53 | 14.8 km/h | 2% |
| 19 September 2026 Sat |  Overcast |
9.9 ° C | 29.4 ° C | 17.7 ° C | % 40 | 10.4 km/h | 5% |
| 20 September 2026 Sun | Overcast |
12.6 ° C | 30.1 ° C | 19 ° C | % 32 | 10.8 km/h | 8% |
| 21 September 2026 Mon | Sunny |
10.4 ° C | 26.7 ° C | 16.9 ° C | % 46 | 23 km/h | 2% |
| 22 September 2026 Tue | Sunny |
6.6 ° C | 27.5 ° C | 14.8 ° C | % 49 | 6.8 km/h | 2% |
| 23 September 2026 Wed | Sunny |
7.9 ° C | 32.2 ° C | 17.7 ° C | % 28 | 8.3 km/h | 0% |
| 24 September 2026 Thu | Sunny |
9.9 ° C | 26.5 ° C | 16.8 ° C | % 38 | 23.8 km/h | 4% |
| 25 September 2026 Fri | Overcast |
8 ° C | 22.2 ° C | 13.8 ° C | % 54 | 21.2 km/h | 8% |
| 26 September 2026 Sat | Sunny |
5.2 ° C | 28 ° C | 14.1 ° C | % 27 | 7.6 km/h | 2% |
| 27 September 2026 Sun | Sunny |
8 ° C | 31.3 ° C | 17.4 ° C | % 19 | 5.8 km/h | 0% |
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