Dubuque, IA
Iowa · Records since 1874–2026
☀️ 95°F
Currently in Dubuque
As of 7:00 PM CDT
🔥 5° below today's record of 100°F
Records for July 28
🔥 Record High
100°F
July 28, 1916
+19° from 81° normal❄ Record Low
50°F
July 28, 2013
-12° from 62° normal
🌞 Normal high: 81°F 🌑 Normal low: 62°F 1991–2020 normals
All-Time Records — Dubuque
110°F
Hottest Day Ever
Jul 14, 1936
-32°F
Coldest Day Ever
Jan 7, 1887
8.85"
Wettest Day Ever
Sep 14, 1967
15.0"
Most Snow in One Day
Mar 5, 1959
Top 10 Record Highs — July 28
| # | Temp | Date |
|---|---|---|
| 🏆 | 100°F | July 28, 1916 |
| 2 | 98°F | July 28, 1941 |
| 3 | 98°F | July 28, 1886 |
| 4 | 97°F | July 28, 1955 |
| 5 | 97°F | July 28, 1931 |
| 6 | 97°F | July 28, 1917 |
| 7 | 94°F | July 28, 1988 |
| 8 | 94°F | July 28, 1983 |
| 9 | 94°F | July 28, 1936 |
| 10 | 94°F | July 28, 1935 |
Top 5 Record Lows — July 28
| # | Temp | Date |
|---|---|---|
| 🥶 | 50°F | July 28, 2013 |
| 2 | 51°F | July 28, 2018 |
| 3 | 51°F | July 28, 2005 |
| 4 | 51°F | July 28, 1994 |
| 5 | 52°F | July 28, 1981 |
Heat Wave Summary — Dubuque
threshold: 90°F (90th percentile of historical Jun–Aug highs)4.4
Avg heat wave length
days (historical)
96°
Avg peak temp
during heat waves
7
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far
2026 Daily High Temperature vs Normal
Year to date
Above normal
Below normal
123 of 207 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1874–20269
2026 so far
14
Avg/year 1970–2025
7
Avg/year (last 10 complete)
42
Most in a year (1934)
Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Dubuque
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 12, 1901 – Jul 27, 1901 | 16 | 106°F (Jul 21) | 98°F | 73°F |
| 2 | Jul 5, 1936 – Jul 18, 1936 | 14 | 110°F (Jul 14) | 103°F | 73°F |
| 3 | Jul 23, 1941 – Aug 4, 1941 | 13 | 100°F (Jul 29) | 94°F | 73°F |
| 4 | Jun 17, 1910 – Jun 26, 1910 | 10 | 95°F (Jun 23) | 92°F | 66°F |
| 5 | Jun 23, 1931 – Jul 1, 1931 | 9 | 103°F (Jun 28) | 100°F | 77°F |
| 6 | Jul 27, 1988 – Aug 4, 1988 | 9 | 101°F (Jul 31) | 97°F | 68°F |
| 7 | Jul 22, 1916 – Jul 30, 1916 | 9 | 100°F (Jul 28) | 97°F | 74°F |
| 8 | Jun 19, 1874 – Jun 27, 1874 | 9 | 98°F (Jun 24) | 94°F | 75°F |
| 9 | Aug 25, 1953 – Sep 2, 1953 | 9 | 96°F (Aug 31) | 93°F | 65°F |
| 10 | Aug 3, 1900 – Aug 11, 1900 | 9 | 95°F (Aug 5) | 92°F | 72°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
32
2026 so far
above-normal nights
44.6
Avg / summer
1970–2020
75
Most in a summer
1943
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
26.34"
2026 YTD
Normal: 22.75"
+3.59"
2.27"
July so far
July normal: 4.80"
-2.53"
12.03"
Summer so far
Summer normal: 13.94"
-1.91"
9
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")