No
you don't need a jacket based on the weather in Helena Valley Northeast, MT 59602, USA 1 second ago
69°F20°C & Cloudy
Wind is 9 mph15 km/h from the West, gusting to 13 mph21 km/h
| September 15 | ||||
| 6pm | 69°F21°C | 8 mph13 km/h West | Cloudy | |
| 7pm | 68°F20°C | 9 mph14 km/h Northwest | Mostly Cloudy | |
| 8pm | 66°F19°C | 10 mph16 km/h Northwest | Cloudy | |
| 9pm | 64°F18°C | 8 mph13 km/h Northwest | Cloudy | |
| 10pm | 61°F16°C | 6 mph10 km/h Northwest | Mostly Cloudy | |
| 11pm | 58°F15°C | 5 mph8 km/h West | Mostly Cloudy | |
| September 16 | ||||
| 12am | 57°F14°C | 5 mph8 km/h Northwest | Cloudy | |
| 1am | 56°F13°C | 4 mph6 km/h West | Mostly Cloudy | |
| 2am | 55°F13°C | 3 mph4 km/h West | Drizzle | |
| 3am | 54°F12°C | 1 mph2 km/h West | Drizzle | |
| 4am | 53°F11°C | 1 mph2 km/h West | Drizzle | |
| 5am | 52°F11°C | 3 mph4 km/h Northwest | Drizzle | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 15 | 48°F9°C | 69°F21°C | 7 mph11 km/h from West | Partly Cloudy | Drizzle |
| September 16 | 51°F11°C | 70°F21°C | 5 mph8 km/h from North | Partly Cloudy | Clear |
| September 17 | 48°F9°C | 76°F24°C | 2 mph4 km/h from Southeast | Clear | Clear |
| September 18 | 48°F9°C | 79°F26°C | 2 mph4 km/h from East | Clear | Clear |
| September 19 | 49°F9°C | 77°F25°C | 2 mph4 km/h from Southeast | Mostly Cloudy | Partly Cloudy |
| September 20 | 53°F12°C | 78°F25°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
| September 21 | 51°F10°C | 74°F23°C | 9 mph14 km/h from West | Mostly Clear | Mostly Clear |
Yes
Low of 51°F11°C, High of 71°F22°CWind: 5 mph8 km/h
Precipitation: 20% rain