September weather in New Plymouth, ID
The average temperature in New Plymouth in September is 64.1°F (47.3°F–80.9°F). Average precipitation: 0.34 inches.
September is a fall month in New Plymouth, and is warmer than the annual average of 51.6°F. Daily temperatures swing about 33.6°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
80.9°F
Avg Low
47.3°F
Precipitation
0.34 in
Daylight
12h 17m
September records in New Plymouth
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 104.0°F (1967) | 37.0°F (1965) | 0.24 in (1964) |
| September 2 | 100.9°F (1998) | 37.0°F (1975) | 0.56 in (1985) |
| September 3 | 100.9°F (1998) | 36.0°F (1961) | 0.14 in (1947) |
| September 4 | 98.1°F (1966) | 34.0°F (1980) | 0.56 in (1970) |
| September 5 | 100.0°F (1966) | 35.1°F (1996) | 0.16 in (2000) |
| September 6 | 100.9°F (1966) | 34.0°F (1992) | 0.52 in (1952) |
| September 7 | 99.0°F (1967) | 32.0°F (1945) | 0.21 in (1978) |
| September 8 | 98.1°F (1969) | 35.1°F (1971) | 0.29 in (1998) |
| September 9 | 98.1°F (1958) | 32.0°F (1976) | 0.18 in (1985) |
| September 10 | 98.1°F (1958) | 32.0°F (1983) | 0.26 in (1985) |
| September 11 | 99.0°F (1959) | 36.0°F (1957) | 0.62 in (1976) |
| September 12 | 97.0°F (1960) | 32.0°F (2005) | 0.15 in (1997) |
| September 13 | 95.0°F (1981) | 30.0°F (1992) | 0.33 in (1980) |
| September 14 | 98.1°F (2002) | 30.0°F (1970) | 1.59 in (1959) |
| September 15 | 95.0°F (1956) | 28.9°F (1970) | 0.39 in (1954) |
| September 16 | 95.0°F (1956) | 30.0°F (1970) | 0.33 in (1976) |
| September 17 | 98.1°F (2000) | 32.0°F (1965) | 0.60 in (1989) |
| September 18 | 96.1°F (1981) | 25.0°F (1965) | 0.59 in (1961) |
| September 19 | 95.0°F (1952) | 24.1°F (1965) | 0.24 in (2006) |
| September 20 | 93.9°F (1967) | 27.0°F (1978) | 0.86 in (2008) |
| September 21 | 97.0°F (1966) | 25.0°F (1983) | 0.38 in (2008) |
| September 22 | 100.0°F (1966) | 28.0°F (1971) | 0.03 in (1968) |
| September 23 | 95.0°F (1966) | 26.1°F (1956) | 0.44 in (2007) |
| September 24 | 91.9°F (1966) | 28.0°F (1956) | 0.53 in (1973) |
| September 25 | 91.9°F (2001) | 25.0°F (1984) | 0.39 in (1998) |
| September 26 | 91.9°F (1956) | 26.1°F (1972) | 0.63 in (2001) |
| September 27 | 93.9°F (1957) | 27.0°F (1971) | 0.13 in (1991) |
| September 28 | 90.0°F (1963) | 26.1°F (1999) | 0.35 in (1962) |
| September 29 | 95.0°F (1963) | 26.1°F (1985) | 0.27 in (1977) |
| September 30 | 93.0°F (1957) | 24.1°F (1985) | 0.35 in (1989) |