Dubuque Climate by Month
Dubuque, Iowa, United States
Warm summers and freezing winters, with rain spread through the year.
Warm summers and freezing winters, with rain spread through the year: that's Dubuque's climate in short. July is the warmest month, with highs around 84°F (29°C); January is the coolest at 29°F (-2°C), and nights dip to 12°F (-11°C). About 35 in (883 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 84°F(29°C)
- Average high, July
- Coldest nights
- 12°F(-11°C)
- Average low, January
- Rain per year
- 35 in(883 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: July
Best and worst months in Dubuque
Best for weatherSeptember is the best time for weather in Dubuque: highs near 75°F (24°C) and about 3.8 in (96 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 29°F (-2°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Dubuque weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 29°F(-2°C) | 12°F(-11°C) | 1.1 in(27 mm) | 80% | 1.5 |
| FebFebruary | 34°F(1°C) | 16°F(-9°C) | 1.4 in(36 mm) | 89% | 2.5 |
| MarMarch | 46°F(8°C) | 27°F(-3°C) | 2.2 in(55 mm) | 68% | 3.7 |
| AprApril | 59°F(15°C) | 38°F(4°C) | 3.6 in(92 mm) | 59% | 4.5 |
| MayMay | 71°F(22°C) | 49°F(10°C) | 4.0 in(101 mm) | 67% | 5.2 |
| JunJune | 81°F(27°C) | 59°F(15°C) | 5.0 in(126 mm) | 68% | 5.9 |
| JulJuly | 84°F(29°C) | 63°F(17°C) | 3.7 in(94 mm) | 70% | 6.0 |
| AugAugust | 82°F(28°C) | 61°F(16°C) | 3.7 in(95 mm) | 75% | 5.2 |
| SepSeptemberBest | 75°F(24°C) | 53°F(12°C) | 3.8 in(96 mm) | 68% | 4.3 |
| OctOctober | 62°F(17°C) | 41°F(5°C) | 2.6 in(66 mm) | 69% | 2.7 |
| NovNovember | 47°F(8°C) | 29°F(-1°C) | 2.0 in(52 mm) | 77% | 1.7 |
| DecDecember | 34°F(1°C) | 18°F(-8°C) | 1.7 in(43 mm) | 84% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate
All 20 places like Dubuque →- 🇺🇸RockfordIllinois, United States · Pop. 148k99%matchSame summer highsSame winter lowsDubuque vs Rockford →
- 🇺🇸JanesvilleWisconsin, United States · Pop. 64k99%matchSame winter lowsSame summer highsDubuque vs Janesville →
- 🇺🇸WaterlooIowa, United States · Pop. 68k99%matchSame summer highsSame winter lowsDubuque vs Waterloo →
- 🇺🇸Cedar RapidsIowa, United States · Pop. 130k99%matchSame winter lowsSame summer highsDubuque vs Cedar Rapids →
- 🇺🇸AmesIowa, United States · Pop. 65k99%matchSame summer highsSame winter lowsDubuque vs Ames →