Spencer, IA
Iowa · Records since 1895–2026
☀️ 90°F
Currently in Spencer
As of 7:00 PM CDT
Records for July 28
🔥 Record High
99°F
July 28, 2021
+15° from 84° normal❄ Record Low
40°F
July 28, 2013
-22° from 62° normal
🌞 Normal high: 84°F 🌑 Normal low: 62°F 1991–2020 normals
All-Time Records — Spencer
113°F
Hottest Day Ever
Jul 17, 1936
-38°F
Coldest Day Ever
Jan 12, 1912
5.50"
Wettest Day Ever
Sep 14, 2004
14.0"
Most Snow in One Day
Mar 3, 1977
Top 10 Record Highs — July 28
| # | Temp | Date |
|---|---|---|
| 🏆 | 99°F | July 28, 2021 |
| 2 | 98°F | July 28, 1987 |
| 3 | 98°F | July 28, 1936 |
| 4 | 98°F | July 28, 1935 |
| 5 | 98°F | July 28, 1931 |
| 6 | 97°F | July 28, 1926 |
| 7 | 96°F | July 28, 2006 |
| 8 | 96°F | July 28, 1955 |
| 9 | 96°F | July 28, 1943 |
| 10 | 95°F | July 28, 1940 |
Top 5 Record Lows — July 28
| # | Temp | Date |
|---|---|---|
| 🥶 | 40°F | July 28, 2013 |
| 2 | 42°F | July 28, 1925 |
| 3 | 46°F | July 28, 1928 |
| 4 | 48°F | July 28, 1952 |
| 5 | 49°F | July 28, 1994 |
Heat Wave Summary — Spencer
threshold: 93°F (90th percentile of historical Jun–Aug highs)4.3
Avg heat wave length
days (historical)
99°
Avg peak temp
during heat waves
2
Dangerous nights 2026
Overnights ≥ 70°F
0
Heat waves 2026
so far
2026 Daily High Temperature vs Normal
Year to date
Above normal
Below normal
121 of 207 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1895–202612
2026 so far
23
Avg/year 1970–2025
24
Avg/year (last 10 complete)
70
Most in a year (1936)
Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Spencer
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 4, 1936 – Jul 19, 1936 | 16 | 113°F (Jul 17) | 106°F | 70°F |
| 2 | Jul 12, 1932 – Jul 22, 1932 | 11 | 100°F (Jul 20) | 96°F | 69°F |
| 3 | Jul 31, 1930 – Aug 8, 1930 | 9 | 111°F (Aug 3) | 99°F | 69°F |
| 4 | Jul 4, 1930 – Jul 12, 1930 | 9 | 106°F (Jul 9) | 101°F | 69°F |
| 5 | Jul 25, 1987 – Aug 2, 1987 | 9 | 100°F (Jul 30) | 97°F | 70°F |
| 6 | Sep 5, 1931 – Sep 13, 1931 | 9 | 99°F (Sep 10) | 96°F | 69°F |
| 7 | Jul 28, 1955 – Aug 5, 1955 | 9 | 99°F (Jul 30) | 96°F | 71°F |
| 8 | Jul 21, 1936 – Jul 28, 1936 | 8 | 106°F (Jul 22) | 99°F | 67°F |
| 9 | Jul 18, 1940 – Jul 25, 1940 | 8 | 106°F (Jul 24) | 102°F | 72°F |
| 10 | Aug 13, 1972 – Aug 20, 1972 | 8 | 95°F (Aug 17) | 94°F | 69°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
22
2026 so far
above-normal nights
39.4
Avg / summer
1970–2020
62
Most in a summer
1983
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
10.42"
2026 YTD
Normal: 16.04"
-5.62"
0.84"
July so far
July normal: 3.84"
-3.00"
3.43"
Summer so far
Summer normal: 11.14"
-7.71"
2
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")