Delta (CO) Weather & Climate: Best Time to Visit

The climate in Delta is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 34°C (93°F) in July to a chilly 4°C (39°F) in the coolest month, January.

Nights vary from 15°C (59°F) in July to around -11°C (12°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Delta is known for its low rain/snowfall, with yearly precipitation amounts around 206 mm (8.1 in). The climate in Delta shows significant variation throughout the year. Expect low rainfall in September, the wettest month, with an average of 29 mm (1.1 in) of precipitation over 7 rainy days.

In contrast, the driest month June offers drier and sunnier days, with around 9 mm (0.4 in) of rainfall over 3 rainy days. For more details, please visit our Delta Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Delta serves as an ideal destination. Expect longer, more sun-filled days in June with an average of 11.9 hours of sunshine daily, and embrace the darker days in December, offering only 6.0 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is moderate throughout the year in Delta.

The city experiences its highest humidity in January, reaching 68%. In June, the humidity drops to its lowest level at 28%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year