30-year climate normals

Juneau City and Borough Climate and Weather Averages

Hottest month — July

64.5°

average daily high. The coldest month is January, averaging a low of 22.2°F.

Juneau City and Borough gets 25.18" of precipitation a year, and 40% of it falls in Sep, Oct, Nov.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

Month	Avg high	Avg low	Precip
January	30.7°	22.2°	2.17"
February	34.7°	25.1°	1.47"
March	39.0°	27.9°	1.52"
April	49.3°	35.2°	1.24"
May	58.1°	42.7°	1.07"
June	62.9°	49.3°	1.16"
July	64.5°	52.0°	1.38"
August	63.4°	51.0°	2.35"
September	57.0°	46.1°	3.89"
October	48.1°	38.9°	3.60"
November	38.0°	29.8°	2.55"
December	33.8°	25.7°	2.78"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 40% falling in the wettest three months (Sep, Oct, Nov).

January 2.17"

February 1.47"

March 1.52"

April 1.24"

May 1.07"

June 1.16"

July 1.38"

August 2.35"

September 3.89"

October 3.60"

November 2.55"

December 2.78"

Annual total 25.18"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 8

Heating degree days How much heating the climate demands 8,113

Approximate annual cooling cost At 28.23¢/kWh, Alaska average $2

Approximate annual electric heating cost Lower where heating is gas rather than electric $802

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Juneau City and Borough, where electricity is one line of eight.

Common questions

What is the weather like in Juneau City and Borough?

Juneau City and Borough averages a high of 64.5°F in July and a low of 22.2°F in January. Annual precipitation is 25.18 inches, with essentially no snow.

When is the rainy season in Juneau City and Borough?

The wettest stretch is Sep, Oct, Nov, which accounts for 40% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Juneau City and Borough?

The average daily high in July, the hottest month, is 64.5°F. That drives 8 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Juneau City and Borough?

Effectively no. Measurable snowfall is rare in Juneau City and Borough.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station SKAGWAY AP, AK US (USW00025335), 85.2 miles from the county centroid.
Heating and cooling degree days — NOAA, same station and period.
Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Alaska residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.