Which is the hottest month in Dubuque?

The hottest time of year in Dubuque is normally July. Expect maximum daytime temperatures to reach 29°C with moderate heat and humidity.

Which month has the most rain in Dubuque?

In terms of rainfall, August is usually the wettest month in Dubuque with 113mm on average. There are normally 9 days in August with some rain.

When is it sunniest in Dubuque?

The sunniest time of year in Dubuque is normally August with bright sunshine on average for 70% of daylight hours; that's 10 hours of sunshine per day.

Best time to visit Dubuque

Q: When is the best time to visit Dubuque?

The best time to visit Dubuque is June and August based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Find the best time to visit Dubuque and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Dubuque by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Iowa

Get Your Guide: up to 40% off experiences

Sale

Save up to 40% on experiences with Get Your Guide
Enjoy guided tours, day trips, river cruises & more
Book attractions in the USA, Asia & beyond

Go to Get Your Guide deal >>

View all Get Your Guide offers

When is the best time to visit Dubuque?

The best time to visit Dubuque is June and August based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

1
Jan
1.5
Feb
1.5
Mar
2
Apr
4.5
May
5
Jun
4.5
Jul
5
Aug
4
Sep
1.5
Oct
0.5
Nov
0.5
Dec

Change criteria

Max Day Temperature (°C)

-4
Jan
-1
Feb
6
Mar
15
Apr
21
May
26
Jun
29
Jul
27
Aug
23
Sep
16
Oct
7
Nov
-1
Dec

Hours of Sunshine (daily)

5
Jan
7
Feb
7
Mar
8
Apr
10
May
11
Jun
10
Jul
10
Aug
8
Sep
7
Oct
5
Nov
4
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Iowa (Dubuque) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)