Big Delta (AK) Weather & Climate: Best Time to Visit

Visitors to Big Delta can expect significant temperature changes throughout the year. Average daytime temperatures reach a pleasant 21°C (70°F) in July. In January, the coolest month of the year, temperatures drop to a very cold -14°C (7°F).

At night, temperatures range from around 12°C (54°F) in July to -22°C (-8°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Big Delta experiences moderate precipitation patterns, averaging 540 mm (21 in) yearly. Big Delta can be quite wet during July, receiving approximately 101 mm (4 in) of precipitation over 13 rainy days.

In contrast, during the driest month (March), you will experience much drier conditions, with 18 mm (0.7 in) of precipitation spread across 4 snowy days. For more details, please visit our Big Delta Precipitation page.

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

The average number of days each month with precipitation

The relative humidity is high throughout the year in Big Delta.

The city experiences its highest humidity in October, reaching 79%. In May, the humidity drops to its lowest level at 56%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The average wind speed over the year ranges from 3 m/s (6 knots) to 4 m/s (8 knots). It is lower in April, May, June, July, August, September and October and higher in January, February, March, November and December. What does this mean?

The mean monthly wind speed over the year (meters per second)