As of 23:55 MDT

Nampa, ID weather in September

76°

Nampa, Saturday, 8 August, 23:55

Clear. Feels like 75°. High 98°, low 62°.

Pressure29.83 inHg

Wind4 mph N

Humidity38%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

In September, Nampa, ID averages a high of 78.9° and a low of 54.6°. About 0.6 inches of precipitation fall over the month (3 wet days). The record high is 103.8° (2022) and the record low 33.1° (1984). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	85.6°	59°	2%	100.2° (2025)	47.5° (1999)
2	84.9°	58.8°	2%	101.1° (2022)	41.5° (1964)
3	84.7°	58.6°	3%	99° (2017)	47.7° (1964)
4	85.3°	58.8°	7%	100.4° (2020)	47.7° (1965)
5	84.7°	59.4°	13%	102.4° (2020)	48.6° (1996)
6	83.7°	58.3°	8%	101.8° (2022)	44.2° (1996)
7	83.3°	58.1°	7%	103.8° (2022)	45.9° (1992)
8	82.4°	57.6°	17%	97° (2024)	46.2° (1978)
9	81.5°	57°	10%	97.3° (2021)	44.8° (1976)
10	80.8°	56.5°	8%	93.4° (1990)	45.3° (1983)
11	79.9°	56.1°	10%	93.6° (1990)	45° (2005)
12	78.8°	55.6°	7%	93.6° (2015)	45° (1970)
13	79.5°	55.2°	7%	95.7° (2020)	42.1° (1970)
14	79.2°	55°	8%	97.9° (2000)	40.1° (1970)
15	78.4°	54.7°	10%	93° (1995)	43.3° (1982)
16	77.5°	53.8°	5%	93.4° (2020)	39.6° (1970)
17	77.7°	54°	13%	95.2° (2020)	36.1° (1965)
18	77°	53.4°	10%	94.1° (1981)	34.5° (1965)
19	74.8°	53.2°	15%	91° (2008)	38.1° (1965)
20	73.9°	51.8°	15%	88.2° (2025)	37.4° (1978)
21	73.8°	51.4°	5%	91.9° (1967)	41° (1993)
22	75.2°	50.4°	8%	95.4° (1966)	38.8° (1968)
23	75.7°	51.3°	5%	92.8° (2001)	38.5° (1977)
24	75.9°	52°	12%	93.2° (2011)	37° (2000)
25	76.5°	51.8°	7%	92.8° (2024)	33.1° (1984)
26	75.4°	51.4°	12%	90.7° (1978)	38.7° (1970)
27	75.2°	51.1°	8%	94.1° (2022)	38.8° (1971)
28	75.4°	50.9°	8%	91.2° (1963)	37° (1972)
29	75.2°	50.9°	13%	92.5° (1963)	34.7° (1985)
30	74.3°	50.7°	17%	91.9° (1992)	35.8° (2019)