Last updated: June 24, 2025
In June, the average temperature in Waterloo, United States hovers around 24°C (76°F), providing a comfortable climate for activities. However, temperatures can vary significantly, with a minimum of 10°C (50°F) and soaring to a maximum of 39°C (103°F). Expect about 126 mm (5.0 in) of precipitation spread over 10 days, contributing to an average humidity level of 82%. Whether you’re exploring the outdoors or enjoying the vibrant local culture, it’s essential to be prepared for the weather variability!
In June in Waterloo, the average temperature is 24°C (76°F). Maximums can reach 39°C (103°F), and minimums can be as low as 10°C (50°F). Be prepared for warm days and cooler nights, making it a great time to explore the outdoors while ensuring you have layers for the evenings.
In Waterloo in June, the total precipitation amount is 126 mm (5.0 in) spread over a duration of 10 days.
In Waterloo in June, humidity is 82%. With an average temperature of 24°C (76°F), this humidity feels like wearing a warm, damp blanket, making travel uncomfortable and sticky as you explore.
In Waterloo in June, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Waterloo.
UV Risk Categories
Weather in Waterloo varies notably across the year, with each month offering distinct climate conditions. This page compares June’s weather to other months in Waterloo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 32 mm (1.3 inches) | 76% | moderate |
| February Weather | -4°C (26°F) | 30 mm (1.2 inches) | 80% | moderate |
| March Weather | 5°C (41°F) | 97 mm (3.8 inches) | 73% | high |
| April Weather | 10°C (51°F) | 54 mm (2.1 inches) | 74% | very high |
| May Weather | 17°C (63°F) | 146 mm (5.8 inches) | 78% | very high |
| June Weather | 24°C (76°F) | 126 mm (5.0 inches) | 82% | very high |
| July Weather | 26°C (78°F) | 74 mm (2.9 inches) | 83% | very high |
| August Weather | 24°C (75°F) | 100 mm (4.0 inches) | 80% | very high |
| September Weather | 21°C (70°F) | 83 mm (3.3 inches) | 75% | very high |
| October Weather | 11°C (53°F) | 115 mm (4.5 inches) | 75% | high |
| November Weather | 5°C (40°F) | 31 mm (1.2 inches) | 82% | moderate |
| December Weather | 0°C (32°F) | 40 mm (1.6 inches) | 83% | low |