May weather - Spring 2024

Weather in May
Frequently asked questions
Average temperature in May
Average pressure in May
Average wind speed in May
Average humidity in May
Average rainfall in May
Average rainfall days in May
Average snowfall in May
Average snowfall days in May
Average daylight in May
Average sunshine in May
Average sunshine days in May
Average UV index in May
Average cloud cover in May
Average visibility in May

A small railway line in Dubuque, Iowa, set on a hilly and scenic greenery spot overlooking the brown buildings in the rest of the city

Weather in May

The splendid Dubuque weather in May is a treat for both residents and visitors. As the city inches further into spring, a significant increase in average temperatures up to a high of 66.9°F (19.4°C), introduces more comfortable and warm conditions. The rainfall peaks at 3.7" (94mm), and although this might suggest gray skies, May typically continues with its gift of long daylight hours. Vibrant greenery starts reclaiming the city's landscapes and parks, shimming under the lingering sunshine. The promising weather encourages more outdoor recreation, making it one of the busiest months in the city's social calendar.

Temperature

With the onset of May, Dubuque's average high-temperature sees a rise, moving from April's mild 55.9°F (13.3°C) to a comfortable 66.9°F (19.4°C). Throughout the nights in May, Dubuque experiences an average low-temperature of 50.2°F (10.1°C).

Humidity

The average relative humidity in May is 81%.

Rainfall

The wettest months are May and June, with an average 3.7" (94mm) of rainfall.

Snowfall

May through September are months without snowfall.

Daylight

In Dubuque, the average length of the day in May is 14h and 38min.
On the first day of May, sunrise is at 5:56 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 5:27 am and sunset at 8:33 pm CDT.

Sunshine

In Dubuque, Iowa, the average sunshine in May is 8.2h.

UV index

In Dubuque, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 5 during May translates into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.

Updated: Jun 6, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature?

An average high-temperature, in May, in Dubuque, is 66.9°F (19.4°C) and the average low-temperature is 50.2°F (10.1°C).

What is the average humidity in May in Dubuque?

In Dubuque, the average relative humidity in May is 81%.

What is the wettest month?

The wettest months are May and June, with an average 3.7" (94mm) of rainfall.

How much does it rain in May?

In Dubuque, in May, during 17.7 rainfall days, 3.7" (94mm) of precipitation is typically accumulated.

When it does not snow?

In Dubuque, snow does not fall in May through September.

Does it snow in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May?

In Dubuque, the average day length in May is 14h and 38min.

When are sunrise and sunset in May?

On the first day of May, sunrise is at 5:56 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 5:27 am and sunset at 8:33 pm CDT.

How many hours of sunshine does Dubuque have in May?

In May, the average sunshine duration is 8.2h.

What is the UV index reading in May?

In Dubuque, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

55.9°F 13.3°C

66.9°F 19.4°C

76.3°F 24.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.3mph 18.2km/h

9.5mph 15.3km/h

8.3mph 13.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

11.8

12.1

10.3

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Dubuque, IA

Average high temperature in May: 66.9°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25°F).

Average low temperature in May: 50.2°F

The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).

Average pressure in May
Dubuque, IA

Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in May
Dubuque, IA

Average wind speed in May: 8.9mph

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in May
Dubuque, IA

Average humidity in May: 81%

The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is October (76%).

Average rainfall in May
Dubuque, IA

Average rainfall in May: 3.7"

The wettest months (with the highest rainfall) are May and June (3.7").
The driest months (with the least rainfall) are January and February (1.14").

Average rainfall days in May
Dubuque, IA

Average rainfall days in May: 17.7 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.4 days).

Average snowfall in May
Dubuque, IA

Average snowfall in May: 0"

The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Dubuque, IA

Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Dubuque, IA

Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

Average sunshine in May: 8h and 1min

The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in May
Dubuque, IA

Average sunshine days in May: 12.1 days

The months with the most sunshine days are November and December (17.5 days).
The month with the least sunshine days is June (10.3 days).

Average UV index in May
Dubuque, IA

Average UV index in May: 5

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).

Average cloud cover in May
Dubuque, IA

Average cloud cover in May: 45

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in May
Dubuque, IA

Average visibility in May: 6mi

The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).

May weather forecast
Dubuque, IA

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