Weather in Nampa in September
How warm is it in Nampa in September?
In September the typical daytime high in Nampa is 26.8 °C on average, from 30.1 °C at the start to 23.9 °C at the end of the month.
That is 5.7 °C cooler than in August and 7.1 °C warmer than in October.
The last 10 years were 0.6 °C cooler than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
Measured at the weather station Payette, 66 km away.