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Crater Lake September Weather

Averages and records for weather in Crater Lake, Oregon in the month of September.

Typical Crater Lake September Weather 1991–2020
Average daily high	63.9 °F
Average daily low	37.2 °F
Average monthly precipitation	1.9 inches
Average monthly snow	1.6 inches
Daily chance of precipitation	17.6%
Daily chance of snow	3.0%

Crater Lake September Weather Records 1919–2024
Highest temperature	93 °F	September 11, 1922
Lowest temperature	16 °F	September 13, 1921
Highest daily low	60 °F	September 4, 2017
Lowest daily high	31 °F	September 24, 1948
Hottest average high temperature	74.2 °F	1922
Coldest average high temperature	49.1 °F	1927
Most daily precipitation	4.4 inches	September 16, 2006
Most monthly precipitation	9.1 inches	2013
Most daily snow	15.0 inches	September 26, 1986
Most monthly snow	56.0 inches	1986

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	67.7	39.5	86	22
September 2	67.4	39.3	84	21
September 3	66.9	39.1	87	22
September 4	66.5	38.9	87	24
September 5	66.2	38.8	85	25
September 6	65.9	38.6	83	22
September 7	65.7	38.4	82	25
September 8	65.5	38.3	84	23
September 9	65.3	38.1	85	21
September 10	65.1	38.0	93	24
September 11	64.8	37.8	93	25
September 12	64.5	37.7	84	17
September 13	64.3	37.5	84	16
September 14	64.1	37.4	83	20
September 15	64.0	37.3	86	19
September 16	63.8	37.3	81	19
September 17	63.5	37.2	83	24
September 18	63.1	36.9	84	18
September 19	62.8	36.7	83	22
September 20	62.2	36.5	81	18
September 21	61.8	36.3	80	23
September 22	61.4	36.1	79	22
September 23	61.0	35.8	79	22
September 24	60.7	35.6	79	20
September 25	60.3	35.4	78	18
September 26	59.9	35.1	80	18
September 27	59.3	34.8	81	19
September 28	58.8	34.5	79	18
September 29	58.3	34.2	78	19
September 30	58.0	34.0	77	20

Weather Station Details

Years	Station	Coordinates
1919–2024	Crater Lake National Park Headquarters	location