Dubuque Climate: Weather by Month and Best Time to Visit
Best months for Dubuque: September, August, July.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -2°C | -10°C | 38 mm | 7 | – | – | 4.1 |
| February | 0°C | -8°C | 43 mm | 6 | – | – | 4.2 |
| March | 8°C | -2°C | 63 mm | 9 | – | – | 5.3 |
| April | 15°C | 5°C | 106 mm | 12 | – | – | 6.3 |
| May | 21°C | 11°C | 114 mm | 13 | – | – | 7.1 |
| June | 26°C | 17°C | 120 mm | 12 | – | – | 7.3 |
| July | 28°C | 19°C | 98 mm | 10 | – | – | 7.6 |
| August | 27°C | 17°C | 96 mm | 10 | – | – | 7.7 |
| September | 23°C | 13°C | 92 mm | 9 | – | – | 7.9 |
| October | 16°C | 6°C | 69 mm | 8 | – | – | 7.0 |
| November | 8°C | 0°C | 58 mm | 8 | – | – | 5.6 |
| December | 1°C | -6°C | 48 mm | 7 | – | – | 4.1 |