Boise January Weather

Typical Boise January Weather 1991–2020
Average daily high	38.8 °F
Average daily low	25.2 °F
Average monthly precipitation	1.4 inches
Average monthly snow	5.3 inches

Boise January Weather Records 1940–2022
Highest temperature	63 °F	January 9, 1953
Lowest temperature	-17 °F	January 31, 1950
Highest daily low	49 °F	January 13, 1969
Lowest daily high	0 °F	January 21, 1962
Hottest average temperature	8.7 °F above average	1953
Coldest average temperature	-22.0 °F below average	1949
Most daily precipitation	1.1 inches	January 18, 1953
Most monthly precipitation	3.9 inches	1970
Most daily snow	8.4 inches	January 20, 2002
Most monthly snow	21.5 inches	1964

Day	Average (°F)		Record (°F)
	High	Low	High	Low
January 1	37.7	24.1	60	-13
January 2	37.7	24.1	55	-5
January 3	37.7	24.2	51	-5
January 4	37.8	24.2	57	-9
January 5	37.8	24.3	52	-12
January 6	37.8	24.4	55	-11
January 7	37.8	24.6	58	-10
January 8	37.8	24.6	55	-14
January 9	37.9	24.7	63	-13
January 10	38.1	24.9	57	-8
January 11	38.2	25.0	58	-6
January 12	38.3	25.0	59	-7
January 13	38.4	25.0	55	-1
January 14	38.5	25.1	56	-2
January 15	38.7	25.1	56	-10
January 16	38.8	25.2	57	-1
January 17	39.0	25.4	56	-7
January 18	39.2	25.5	58	-13
January 19	39.4	25.6	54	-10
January 20	39.7	25.8	57	-8
January 21	39.9	26.0	53	-12
January 22	40.1	26.2	53	-11
January 23	40.3	26.3	57	-12
January 24	40.5	26.3	57	-6
January 25	40.7	26.4	59	-5
January 26	40.9	26.5	55	-8
January 27	41.1	26.6	52	-9
January 28	41.3	26.7	56	-6
January 29	41.5	26.8	56	-9
January 30	41.7	27.0	59	-13
January 31	42.1	27.2	61	-17