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St. Johns May Weather

Averages and records for weather in St. Johns, Arizona in the month of May.

Typical St. Johns May Weather 1991–2020
Average daily high	79.3 °F
Average daily low	44.1 °F
Average monthly precipitation	0.4 inches
Average monthly snow	0.1 inches
Daily chance of precipitation	6.1%
Daily chance of snow	0.23%

St. Johns May Weather Records 1901–2024
Highest temperature	99 °F	May 31, 2002
Lowest temperature	21 °F	May 12, 1933
Highest daily low	67 °F	May 21, 2006
Lowest daily high	45 °F	May 7, 1969
Hottest average high temperature	85.1 °F	2000
Coldest average high temperature	71.2 °F	1933
Most daily precipitation	1.8 inches	May 31, 1914
Most monthly precipitation	2.6 inches	1992
Most daily snow	4.0 inches	May 3, 1933
Most monthly snow	4.0 inches	1933

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

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
May 1	75.0	40.1	90	24
May 2	75.4	40.4	91	22
May 3	75.7	40.7	91	24
May 4	76.0	41.0	92	22
May 5	76.3	41.4	92	24
May 6	76.6	41.7	92	25
May 7	76.8	42.0	91	25
May 8	77.0	42.2	89	25
May 9	77.3	42.4	93	27
May 10	77.5	42.7	91	27
May 11	77.7	43.0	91	25
May 12	78.0	43.2	95	21
May 13	78.3	43.4	92	26
May 14	78.6	43.7	94	25
May 15	78.9	44.0	93	25
May 16	79.2	44.3	91	25
May 17	79.7	44.6	91	29
May 18	80.1	45.0	92	27
May 19	80.5	45.2	95	29
May 20	80.8	45.5	96	27
May 21	81.2	45.8	95	29
May 22	81.5	46.1	96	27
May 23	82.0	46.4	96	28
May 24	82.4	46.6	92	30
May 25	82.7	46.8	92	27
May 26	83.0	47.1	95	30
May 27	83.3	47.4	97	31
May 28	83.5	47.6	95	33
May 29	83.7	47.8	99	32
May 30	83.9	48.0	97	30
May 31	84.2	48.2	99	31

Weather Station Details

Years	Station	Coordinates
1901–2024	St. Johns	location