The highest day temperature in May 2025 was 48°F. The lowest night temperature was 38°F. The average values for day and night temperatures during May were 43.2°F и 42.3°F respectivly.

The average sea surface temperature in May 2025 for Sitka was 47.2°F. The maximum and minimum values were 45.2°F and 49.0°F respectively.

Most of the days in May are gloomy but you can also expect sunny days.

Precipitation total in May for Sitka is 1.4 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 4.8 mph. It makes May one of the most windless months of the year for Sitka.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Sitka in May is 5.0 hours.