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St. Johnsbury August Weather

Averages and records for weather in St. Johnsbury, Vermont in the month of August.

Typical St. Johnsbury August Weather 1991–2020
Average daily high	79.4 °F
Average daily low	56.6 °F
Average monthly precipitation	3.9 inches
Average monthly snow	none
Daily chance of precipitation	39.4%
Daily chance of snow	0%

St. Johnsbury August Weather Records 1894–2024
Highest temperature	100 °F	August 8, 1909
Lowest temperature	33 °F	August 31, 1965
Highest daily low	74 °F	August 1, 1999
Lowest daily high	56 °F	August 31, 1985
Hottest average high temperature	85.3 °F	1944
Coldest average high temperature	72.3 °F	1903
Most daily precipitation	4.3 inches	August 5, 1989
Most monthly precipitation	9.1 inches	2011
Most daily snow	none	-
Most monthly snow	none	-

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

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
August 1	80.8	58.2	97	38
August 2	80.7	58.1	95	39
August 3	80.6	58.1	99	39
August 4	80.6	58.0	96	38
August 5	80.4	58.0	95	41
August 6	80.3	57.8	93	41
August 7	80.2	57.7	96	42
August 8	80.1	57.6	100	38
August 9	80.0	57.5	94	38
August 10	79.9	57.3	94	38
August 11	79.8	57.1	98	41
August 12	79.8	56.9	94	40
August 13	79.7	56.8	94	40
August 14	79.6	56.8	98	39
August 15	79.5	56.7	97	39
August 16	79.4	56.6	96	39
August 17	79.2	56.4	96	40
August 18	79.0	56.2	94	36
August 19	78.8	55.9	96	38
August 20	78.7	55.7	95	39
August 21	78.7	55.7	96	37
August 22	78.6	55.6	93	36
August 23	78.4	55.4	91	38
August 24	78.3	55.2	95	37
August 25	78.1	55.1	99	35
August 26	77.9	54.9	95	35
August 27	77.7	54.6	93	35
August 28	77.5	54.3	95	36
August 29	77.2	54.0	95	34
August 30	77.0	53.8	95	36
August 31	76.8	53.5	91	33

Weather Station Details

Years	Station	Coordinates
1894–2024	St. Johnsbury	location