Iowa, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and Climate
Dubuque, IA

  • The average high temperature in May: 20.6°C

The warmest month (with the highest average high temperature) is July (27.8°C).
The month with the lowest average high temperature is January (-3.9°C).

  • The average low temperature in May: 8.9°C

The month with the highest average low temperature is July (16.7°C).
The coldest month (with the lowest average low temperature) is January (-12.8°C).

  • The average rainfall in May: 106.7mm

The wettest month (with the highest rainfall) is August (116.8mm).
Driest months (with the lowest rainfall) are January and February (33mm).

  • The average rainfall days in May: 11 days

The month with the highest number of rainy days is April (12 days).
The month with the lowest number of rainy days is February (8 days).

  • The average daylight in May: 15h

Months with the longest days are May, June and July (Average daylight: 15h).
Months with shortest days are January and December (Average daylight: 9h).

  • The average sunshine in May: 10h

The month with most sunshine is June (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 4h).

  • The average UV index in May: 7

The month with the highest UV index is July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).