Sisseton, SD
South Dakota · Records since 1931–2026
☀️ 86°F
Feels like 91°
Currently in Sisseton
As of 7:00 PM CDT
Records for July 28
🔥 Record High
105°F
July 28, 1975
+22° from 83° normal❄ Record Low
42°F
July 28, 2013
-18° from 60° normal
🌞 Normal high: 83°F 🌑 Normal low: 60°F 1991–2020 normals
All-Time Records — Sisseton
113°F
Hottest Day Ever
Jul 6, 1936
-37°F
Coldest Day Ever
Jan 24, 1936
5.50"
Wettest Day Ever
May 27, 1954
24.2"
Most Snow in One Day
Jan 4, 1997
Top 10 Record Highs — July 28
| # | Temp | Date |
|---|---|---|
| 🏆 | 105°F | July 28, 1975 |
| 2 | 105°F | July 28, 1933 |
| 3 | 102°F | July 28, 1988 |
| 4 | 99°F | July 28, 1941 |
| 5 | 98°F | July 28, 1960 |
| 6 | 98°F | July 28, 1959 |
| 7 | 97°F | July 28, 2006 |
| 8 | 97°F | July 28, 1987 |
| 9 | 96°F | July 28, 1947 |
| 10 | 95°F | July 28, 2021 |
Top 5 Record Lows — July 28
| # | Temp | Date |
|---|---|---|
| 🥶 | 42°F | July 28, 2013 |
| 2 | 46°F | July 28, 1981 |
| 3 | 48°F | July 28, 1973 |
| 4 | 48°F | July 28, 1971 |
| 5 | 49°F | July 28, 1934 |
Heat Wave Summary — Sisseton
threshold: 92°F (90th percentile of historical Jun–Aug highs)4.3
Avg heat wave length
days (historical)
99°
Avg peak temp
during heat waves
3
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far
2026 Daily High Temperature vs Normal
Year to date
Above normal
Below normal
116 of 207 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1932–202615
2026 so far
19
Avg/year 1970–2025
16
Avg/year (last 10 complete)
65
Most in a year (1934)
Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Sisseton
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 4, 1936 – Jul 19, 1936 | 16 | 113°F (Jul 6) | 103°F | 69°F |
| 2 | Aug 17, 1976 – Aug 27, 1976 | 11 | 105°F (Aug 18) | 100°F | 68°F |
| 3 | Jul 20, 1941 – Jul 28, 1941 | 9 | 104°F (Jul 24) | 98°F | 73°F |
| 4 | May 26, 1934 – Jun 2, 1934 | 8 | 113°F (May 30) | 103°F | 63°F |
| 5 | Jul 17, 1934 – Jul 24, 1934 | 8 | 112°F (Jul 22) | 102°F | 70°F |
| 6 | Jul 14, 1932 – Jul 21, 1932 | 8 | 106°F (Jul 19) | 99°F | 68°F |
| 7 | Jul 17, 1940 – Jul 24, 1940 | 8 | 105°F (Jul 24) | 100°F | 69°F |
| 8 | Jul 26, 1988 – Aug 2, 1988 | 8 | 102°F (Jul 27) | 98°F | 69°F |
| 9 | Jun 3, 2021 – Jun 10, 2021 | 8 | 101°F (Jun 5) | 97°F | 67°F |
| 10 | Jul 16, 1974 – Jul 23, 1974 | 8 | 98°F (Jul 17) | 96°F | 66°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
35
2026 so far
above-normal nights
44.0
Avg / summer
1970–2020
67
Most in a summer
2022
Above-Normal Summer Nights Per Year
Average June–August Low by Decade
Overnight lows · complete decades only
Precipitation
Actual vs. 1991–2020 full-month and full-season normals
9.91"
2026 YTD
Normal: 13.86"
-3.95"
2.83"
July so far
July normal: 3.49"
-0.66"
4.79"
Summer so far
Summer normal: 9.60"
-4.81"
1
2026 heavy rain days
Days with ≥ 1.0"
Monthly Precipitation — Last 24 Months
Blue = actual · dashed line = monthly normal
Annual Precipitation Per Year (1970–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Heavy Rain Days Per Year (≥ 1.0")
Compare year-to-year changes in days with heavy rainfall (≥ 1.0")