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Interior May Weather

Averages and records for weather in Interior, South Dakota in the month of May.

Typical Interior May Weather 1991–2020
Average daily high	72.2 °F
Average daily low	46.6 °F
Average monthly precipitation	3.6 inches
Average monthly snow	0.5 inches
Daily chance of precipitation	31.5%
Daily chance of snow	0.24%

Interior May Weather Records 1949–2024
Highest temperature	102 °F	May 27, 1969
Lowest temperature	20 °F	May 1, 1967
Highest daily low	76 °F	May 16, 1987
Lowest daily high	34 °F	May 10, 2015
Hottest average high temperature	79.6 °F	1958
Coldest average high temperature	63.8 °F	2019
Most daily precipitation	4.0 inches	May 5, 2007
Most monthly precipitation	9.5 inches	2015
Most daily snow	12.0 inches	May 10, 2015
Most monthly snow	13.0 inches	2015

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	66.9	40.9	91	20
May 2	67.3	41.4	90	22
May 3	67.6	41.7	94	24
May 4	68.1	42.2	95	26
May 5	68.6	42.6	96	27
May 6	69.0	43.0	93	27
May 7	69.4	43.4	92	30
May 8	69.6	43.8	95	27
May 9	69.8	44.2	95	30
May 10	70.0	44.6	94	29
May 11	70.3	44.9	90	27
May 12	70.6	45.2	89	28
May 13	71.0	45.6	95	26
May 14	71.5	46.0	94	27
May 15	71.9	46.4	90	31
May 16	72.4	46.8	92	34
May 17	72.8	47.2	96	34
May 18	73.1	47.6	94	33
May 19	73.4	47.9	98	34
May 20	73.6	48.3	96	28
May 21	73.9	48.6	92	34
May 22	74.2	49.0	98	30
May 23	74.7	49.4	92	34
May 24	75.1	49.7	89	33
May 25	75.4	50.1	89	35
May 26	75.9	50.5	97	34
May 27	76.3	50.9	102	35
May 28	76.6	51.2	98	36
May 29	76.8	51.5	94	38
May 30	77.0	51.9	97	35
May 31	77.3	52.1	94	35

Weather Station Details

Years	Station	Coordinates
1949–2024	Interior 3 Ne	location