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Salmon September Weather

Averages and records for weather in Salmon, Idaho in the month of September.

Typical Salmon September Weather 1991–2020
Average daily high	74.8 °F
Average daily low	41.0 °F
Average monthly precipitation	0.7 inches
Average monthly snow	0.2 inches
Daily chance of precipitation	15.3%
Daily chance of snow	0.11%

Salmon September Weather Records 1967–2024
Highest temperature	98 °F	September 6, 2020
Lowest temperature	20 °F	September 30, 1985
Highest daily low	64 °F	September 6, 1998
Lowest daily high	35 °F	September 30, 2019
Hottest average high temperature	84.6 °F	1979
Coldest average high temperature	66.2 °F	1986
Most daily precipitation	0.9 inches	September 6, 2001
Most monthly precipitation	2.2 inches	1985
Most daily snow	5.0 inches	September 30, 2019
Most monthly snow	5.0 inches	2019

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	80.8	45.4	96	35
September 2	80.5	45.1	95	33
September 3	80.0	44.9	97	35
September 4	79.5	44.6	92	33
September 5	79.0	44.3	97	34
September 6	78.6	43.9	98	32
September 7	78.1	43.6	93	28
September 8	77.7	43.3	97	29
September 9	77.3	43.0	92	29
September 10	76.9	42.8	91	29
September 11	76.5	42.5	89	32
September 12	76.1	42.1	91	29
September 13	75.7	41.8	90	29
September 14	75.3	41.4	90	27
September 15	74.9	41.1	95	26
September 16	74.6	40.8	94	28
September 17	74.2	40.5	90	29
September 18	73.7	40.2	91	25
September 19	73.2	39.9	89	26
September 20	72.7	39.5	92	21
September 21	72.1	39.2	89	26
September 22	71.6	38.9	86	24
September 23	71.2	38.7	85	25
September 24	70.8	38.4	87	27
September 25	70.3	38.1	90	22
September 26	69.8	37.7	89	23
September 27	69.3	37.4	85	28
September 28	68.7	37.1	86	22
September 29	68.1	36.8	85	22
September 30	67.6	36.4	84	20

Weather Station Details

Years	Station	Coordinates
1967–2024	Salmon KSRA	location