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Flagstaff August Weather

Averages and records for weather in Flagstaff, Arizona in the month of August.

Typical Flagstaff August Weather 1991–2020
Average daily high	79.3 °F
Average daily low	50.5 °F
Average monthly precipitation	3.0 inches
Average monthly snow	none
Daily chance of precipitation	42.9%
Daily chance of snow	0%

Flagstaff August Weather Records 1893–2024
Highest temperature	95 °F	August 12, 1940
Lowest temperature	24 °F	August 23, 1968
Highest daily low	66 °F	August 2, 1897
Lowest daily high	53 °F	August 23, 1992
Hottest average high temperature	85.9 °F	1898
Coldest average high temperature	68.6 °F	1906
Most daily precipitation	3.0 inches	August 13, 1986
Most monthly precipitation	8.1 inches	1986
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	80.7	52.1	92	44
August 2	80.6	52.0	90	43
August 3	80.6	51.9	91	37
August 4	80.5	51.8	91	35
August 5	80.4	51.8	89	35
August 6	80.4	51.7	90	36
August 7	80.2	51.7	92	39
August 8	80.2	51.5	91	35
August 9	80.1	51.4	92	35
August 10	80.0	51.4	89	40
August 11	79.8	51.3	92	42
August 12	79.6	51.2	95	36
August 13	79.5	51.0	92	39
August 14	79.4	50.8	94	33
August 15	79.4	50.7	91	33
August 16	79.3	50.5	93	37
August 17	79.2	50.3	91	38
August 18	79.1	50.2	93	36
August 19	79.0	50.0	91	35
August 20	79.0	49.9	90	35
August 21	78.9	49.7	90	33
August 22	78.8	49.6	90	32
August 23	78.7	49.5	90	24
August 24	78.6	49.4	91	30
August 25	78.5	49.3	88	36
August 26	78.2	49.0	89	37
August 27	78.0	48.7	92	36
August 28	77.7	48.5	87	35
August 29	77.6	48.2	89	37
August 30	77.3	47.9	87	36
August 31	77.1	47.6	89	35

Weather Station Details

Years	Station	Coordinates
1893–2024	Flagstaff Pulliam Airport	location