Dubuque, United States experiences average highs of 15°C (59°F) and lows of 6°C (43°F) throughout the year. Rainfall is moderate, averaging about 9 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have stayed broadly stable across the available records.
Dubuque, United States Weather & Climate 2026
Monthly climate averages for Dubuque, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Mar–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.3/10
Best: May, June, July, August, September
UV Index
5
Low
Temperature 15°C / 6°C
Feels Like 14°C / 4°C
Rainy Days 9
Rainfall 80 mm
Sunshine 9 h
Humidity 70%
Wind Speed 19 km/h
Dew Point 6°C
Snow Days 6 days
Frost Days 16 days
Hottest Month
29°C
July
Avg Low20°C
Rain11days
Coldest Month
-9°C
January
Avg High-1°C
Rain8days
Driest Month
6days
February
Avg High2°C
Avg Low-7°C
Windiest Month
22 km/h
April (Gusts 47)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures.
Sun Position
Sunrise 05:26
Daylight 15.3h
Sunset 20:43
Live conditions—
Dubuque on the map · live conditions
Dubuque, United States
- Continent
- Americas
- Country
- United States
- City
- Dubuque
- Population
- 58.8K
- Elevation
- 189 m
- Coordinates
- 42.50°, -90.66°
Seasonal Breakdown
Spring
Mar–May
Avg High 15°C
Avg Low 5°C
Rain 11 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 28°C
Avg Low 19°C
Rain 11 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 17°C
Avg Low 9°C
Rain 8 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 1°C
Avg Low -7°C
Rain 7 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: -1°C / -9°C . Feb: 2°C / -7°C . Mar: 9°C / 0°C . Apr: 15°C / 5°C . May: 22°C / 12°C . Jun: 28°C / 18°C . Jul: 29°C / 20°C . Aug: 28°C / 19°C . Sep: 25°C / 16°C . Oct: 17°C / 9°C . Nov: 9°C / 1°C . Dec: 2°C / -5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 46 mm. Feb: 43 mm. Mar: 81 mm. Apr: 98 mm. May: 119 mm. Jun: 112 mm. Jul: 98 mm. Aug: 82 mm. Sep: 100 mm. Oct: 85 mm. Nov: 52 mm. Dec: 44 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 75%. Feb: 70%. Mar: 66%. Apr: 66%. May: 69%. Jun: 68%. Jul: 72%. Aug: 72%. Sep: 71%. Oct: 68%. Nov: 70%. Dec: 73%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 20 km/h . Mar: 21 km/h . Apr: 22 km/h . May: 19 km/h . Jun: 18 km/h . Jul: 16 km/h . Aug: 15 km/h . Sep: 17 km/h . Oct: 20 km/h . Nov: 20 km/h . Dec: 19 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 8h. Apr: 9h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 10h. Oct: 7h. Nov: 6h. Dec: 5h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 4. Mar: UV 4. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 10 days. Feb: 9 days. Mar: 5 days. Apr: 3 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 1 days. Nov: 4 days. Dec: 8 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 10 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 29°C | Jul · 29°C |
| Coldest month | Jan 2025 · -9°C | Jan · -9°C |
| Wettest month | Jul 2025 · 189 mm | May · 119 mm |
| Windiest month | Mar 2025 · 24 km/h | Apr · 22 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May best
Excellent June best
Excellent July best
Good August best
Excellent September best
Excellent October
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -1°C / -9°C | -6°C / -14°C | 8days (46 mm) Wet | 5.3h Fair | 75% Muggy | 2.3 Moderate | Poor | View Details |
| February | 2°C / -7°C | -3°C / -13°C | 6days (43 mm) Good | 7.2h Good | 70% Muggy | 3.5 Moderate | Poor | View Details |
| March | 9°C / 0°C | 6°C / -5°C | 10days (81 mm) Wet | 7.8h Good | 66% Muggy | 4.4 Moderate | Poor | View Details |
| April | 15°C / 5°C | 12°C / 1°C | 12days (98 mm) Wet | 8.7h Good | 66% Muggy | 5.5 High | Fair | View Details |
| May best | 22°C / 12°C | 21°C / 10°C | 12days (119 mm) Wet | 10h Excellent | 69% Muggy | 6.5 High | Excellent | View Details |
| June best | 28°C / 18°C | 29°C / 18°C | 11days (112 mm) Wet | 11.8h Excellent | 68% Muggy | 7 High | Excellent | View Details |
| July best | 29°C / 20°C | 32°C / 22°C | 11days (98 mm) Wet | 12h Excellent | 72% Muggy | 7 High | Good | View Details |
| August best | 28°C / 19°C | 30°C / 20°C | 10days (82 mm) Wet | 11.1h Excellent | 72% Muggy | 6.5 High | Excellent | View Details |
| September best | 25°C / 16°C | 25°C / 15°C | 9days (100 mm) Wet | 9.5h Good | 71% Muggy | 5.4 High | Excellent | View Details |
| October | 17°C / 9°C | 15°C / 6°C | 9days (85 mm) Wet | 7.3h Good | 68% Muggy | 3.9 Moderate | Good | View Details |
| November | 9°C / 1°C | 5°C / -3°C | 6days (52 mm) Good | 6.3h Fair | 70% Muggy | 2.5 Moderate | Poor | View Details |
| December | 2°C / -5°C | -2°C / -10°C | 7days (44 mm) Good | 5.2h Fair | 73% Muggy | 2 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Dubuque are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Dubuque, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Dubuque is July, with average daytime highs of 29°C (84°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Dubuque is January, with average overnight lows of -9°C (16°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Dubuque is May, averaging 119mm of precipitation across 12 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Dubuque runs through April, May, June, July, with the heaviest rainfall in April. Based on 10-year averages for Dubuque.
Dubuque receives approximately 102 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Dubuque.
The least favorable months to visit Dubuque are January, February, March, December, primarily due to very cold temperatures. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Dubuque is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Dubuque is 70%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Dubuque receives snow. Months with snowfall average 6 snow days and 10 cm (4 in) of accumulation, with about 16 frost days during winter.
Average wind speeds in Dubuque are 19 km/h (12 mph). The windiest month is April with peak winds reaching 22 km/h (14 mph) (gusts up to 47 km/h / 29 mph).
Dubuque averages 4 clear-sky days per month with overall cloud cover around 58%. The clearest skies occur in September.
The annual average dew point in Dubuque is 6°C (43°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Dubuque has a Hot-Summer Continental climate, classified as Dfa under the Köppen system. Continental climates experience extreme temperature ranges — hot summers and cold, snowy winters.
The 'feels like' temperature in Dubuque ranges from 4°C (39°F) to 14°C (57°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Dubuque. It earns a climate score of 8.4/10 with Excellent.
For June in Dubuque, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 28°C (82°F) and 11 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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