Rockford, IL
Illinois · Records since 1893–2026
Records for August 11
🔥 Record High
August 11, 1941
+18° from 83° normal❄ Record Low
August 11, 1982
-16° from 63° normalAll-Time Records — Rockford
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 101°F | August 11, 1941 |
| 2 | 97°F | August 11, 1923 |
| 3 | 96°F | August 11, 1920 |
| 4 | 95°F | August 11, 1947 |
| 5 | 95°F | August 11, 1916 |
| 6 | 94°F | August 11, 2002 |
| 7 | 94°F | August 11, 1944 |
| 8 | 93°F | August 11, 1988 |
| 9 | 93°F | August 11, 1935 |
| 10 | 92°F | August 11, 1995 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 47°F | August 11, 1982 |
| 2 | 49°F | August 11, 1967 |
| 3 | 49°F | August 11, 1930 |
| 4 | 50°F | August 11, 2024 |
| 5 | 51°F | August 11, 2004 |
Heat Wave Summary — Rockford
threshold: 92°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date122 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1893–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Rockford
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 6, 1936 – Jul 18, 1936 | 13 | 112°F (Jul 14) | 104°F | 70°F |
| 2 | Jul 22, 1916 – Aug 1, 1916 | 11 | 105°F (Jul 31) | 98°F | 69°F |
| 3 | Jul 26, 1955 – Aug 4, 1955 | 10 | 103°F (Jul 27) | 97°F | 72°F |
| 4 | Aug 25, 1953 – Sep 3, 1953 | 10 | 102°F (Sep 1) | 98°F | 66°F |
| 5 | Jun 28, 1921 – Jul 7, 1921 | 10 | 100°F (Jul 4) | 97°F | 69°F |
| 6 | Jul 13, 1932 – Jul 22, 1932 | 10 | 100°F (Jul 15) | 97°F | 67°F |
| 7 | Jul 23, 1941 – Jul 31, 1941 | 9 | 102°F (Jul 29) | 96°F | 71°F |
| 8 | Jun 16, 1921 – Jun 24, 1921 | 9 | 95°F (Jun 18) | 93°F | 67°F |
| 9 | Jul 19, 1934 – Jul 26, 1934 | 8 | 107°F (Jul 24) | 102°F | 72°F |
| 10 | May 29, 1934 – Jun 5, 1934 | 8 | 106°F (May 31) | 99°F | 64°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
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
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")
Month in Review — July 2026
Average temperature · July 2026
63rd-warmest month on record
46th-warmest July of 128 on record
+1.4° vs. 73.5° average (1991–2020)Longest 90°F Streak in July
6 consecutive days with highs of at least 90°F (Jul 13–18, 2026, peaking at 92°F)
The longest July streak since 2020 (6 years). The July record is 20 days, set in 1916.
Average July Temperature by Year
1893–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2012 | 80.8°F |
| 2 | 1921 | 80.3°F |
| 3 | 1936 | 80.0°F |
| 4 | 1955 | 79.4°F |
| 5 | 1916 | 79.0°F |
| 6 | 2011 | 78.9°F |
| 7 | 1935 | 78.3°F |
| 8 | 1934 | 78.1°F |
| 9 | 1983 | 78.0°F |
| 10 | 1897 | 77.5°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2012 | 80.8°F |
| 2 | August 1947 | 80.6°F |
| 3 | July 1921 | 80.3°F |
| 4 | July 1936 | 80.0°F |
| 5 | July 1955 | 79.4°F |
| 6 | July 1916 | 79.0°F |
| 7 | July 2011 | 78.9°F |
| 8 | July 1935 | 78.3°F |
| 9 | July 1934 | 78.1°F |
| 10 | July 1983 | 78.0°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Rockford, IL | 74.9°F | 46th of 128 |
| Madison, WI | 74.5°F | 29th of 158 |
| Chicago, IL | 76.8°F | 22nd of 155 |
| Milwaukee, WI | 75.0°F | 15th of 156 |
| Dubuque, IA | 75.3°F | 41st of 151 |