Climateby Month

Sitka, AK climate by month

NOAA 1991-2020 normals · 27 ft elevation

Summers in Sitka are cool; winters are cold. Highs peak at 62°F in August and fall to 41°F in January. Wet days are spread through the year, from about 16 to 24 a month. The most comfortable time to visit is June, July and August.

Warmest month
62°F
August normal high
Coldest month
32°F
February normal low
Wet days a year
235
84.5 in of precipitation
Muggy days a year
0
dew point 65°F or higher

How warm is Sitka?

Normal highs range from 41°F in January to 62°F in August.

30°40°50°60°70° January: normal high 41°F (5°C), low 32°F (0°C) 41° 32° February: normal high 41°F (5°C), low 32°F (0°C) March: normal high 43°F (6°C), low 33°F (1°C) April: normal high 48°F (9°C), low 37°F (3°C) May: normal high 53°F (12°C), low 43°F (6°C) June: normal high 58°F (14°C), low 48°F (9°C) July: normal high 60°F (16°C), low 53°F (12°C) August: normal high 62°F (17°C), low 53°F (12°C) 62° 53° September: normal high 58°F (14°C), low 49°F (9°C) October: normal high 51°F (11°C), low 42°F (6°C) November: normal high 44°F (7°C), low 36°F (2°C) December: normal high 42°F (6°C), low 33°F (1°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Sitka?

October has the most wet days (about 24); the year brings about 84 in of precipitation.

January: 21 wet days February: 17 wet days March: 18 wet days April: 18 wet days May: 16 wet days 16 June: 17 wet days July: 19 wet days August: 19 wet days September: 22 wet days October: 24 wet days 24 November: 22 wet days December: 22 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How humid is Sitka?

Muggy days (dew point 65°F or higher) are rare in any month.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 0 muggy days July: 0 muggy days August: 0 muggy days September: 0 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Sitka Rocky Gutierrez Arpt, 1.4 mi WSW of the city center.

How much daylight?

Daylight ranges from about 6.8 hours in December to 17.8 hours in June.

January: 7.5 hours of daylight February: 9.5 hours of daylight March: 11.9 hours of daylight April: 14.3 hours of daylight May: 16.6 hours of daylight June: 17.8 hours of daylight 17.8 July: 17.1 hours of daylight August: 15.2 hours of daylight September: 12.8 hours of daylight October: 10.3 hours of daylight November: 8.1 hours of daylight December: 6.8 hours of daylight 6.8 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Sitka, 1991-2020
MonthHighLowPrecip.Wet daysMuggy daysDaylight
January 41°F32°F 8.2 in21 0 7.5 h
February 41°F32°F 5.9 in17 0 9.5 h
March 43°F33°F 5.6 in18 0 11.9 h
April 48°F37°F 4.3 in18 0 14.3 h
May 53°F43°F 3.8 in16 0 16.6 h
June 58°F48°F 2.9 in17 0 17.8 h
July 60°F53°F 4.6 in19 0 17.1 h
August 62°F53°F 7.3 in19 0 15.2 h
September 58°F49°F 11.7 in22 0 12.8 h
October 51°F42°F 11.8 in24 0 10.3 h
November 44°F36°F 9.9 in22 0 8.1 h
December 42°F33°F 8.4 in22 0 6.8 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Sitka

By our comfort score, the best months are June, July and August.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 2401514
Feb 2801212
Mar 360139
Apr 500111
May 542100
Jun 56290
Jul 575110
Aug 597130
Sep 432180
Oct 330190
Nov 270176
Dec 2501611

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Sitka

The last spring frost typically comes around Apr 12, and the first fall frost around Nov 1, leaving 201 frost-free days in a typical year.

Frost and freeze dates for Sitka
Typical date1 year in 10
Last spring frost (32°F)Apr 12after Apr 30
First fall frost (32°F)Nov 1before Oct 13
Last hard freeze (28°F)Mar 24after Apr 7
First hard freeze (28°F)Nov 22before Nov 1
Frost-free season201 daysunder 174 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Sitka Airport (USW00025333), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Alaska.

Hottest and coldest readings, 1991-2020

The highest reading was 88°F (July 31, 2020); the lowest was 5°F (January 17, 2012).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Sitka

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, frost dates and humidity and wind by hour: Sitka Airport (USW00025333), 1.4 mi WSW of the city center, 14 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Sitka Rocky Gutierrez Arpt (703710-25333), 1.4 mi WSW of the city center, 20 ft . Hourly observations, 1991-2020.
  • Not available for this location: snowfall, snow depth and cloud cover (no station close enough or similar enough in elevation).

Distances from the city center (USGS). Methodology · Report an error