Juneau, United States experiences average highs of 8°C (46°F) and lows of 3°C (37°F) throughout the year. Rainfall is frequent, averaging about 19 rainy days per month. Average highs have cooled by 1.5°C (2.7°F) across the available records.
Juneau, United States Weather & Climate 2026
Monthly climate averages for Juneau, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Aug 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
2.9/10
Best: June, July, August, September
UV Index
2
Low
Temperature 8°C / 3°C
Feels Like 6°C / 0°C
Rainy Days 19
Rainfall 233 mm
Sunshine 6 h
Humidity 81%
Wind Speed 11 km/h
Dew Point 2°C
Snow Days 16 days
Frost Days 14 days
Hottest Month
19°C
July
Avg Low13°C
Rain19days
Coldest Month
-5°C
December
Avg High-1°C
Rain20days
Driest Month
17days
February
Avg High-1°C
Avg Low-5°C
Windiest Month
13 km/h
December (Gusts 46)
Worst Time to Visit
Consider avoiding January, February, March, October due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 03:53
Daylight 18.2h
Sunset 22:06
Live conditions—
Juneau on the map · live conditions
Juneau, United States
- Continent
- Americas
- Country
- United States
- City
- Juneau
- Population
- 31.6K
- Elevation
- 17 m
- Coordinates
- 58.30°, -134.42°
Seasonal Breakdown
Spring
Mar–May
Avg High 6°C
Avg Low 1°C
Rain 18 days/mo
Summer
Jun–Aug
Avg High 18°C
Avg Low 12°C
Rain 19 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 8°C
Avg Low 3°C
Rain 21 days/mo
1/3 best months
Winter
Dec–Feb
Avg High -1°C
Avg Low -5°C
Rain 19 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: -1°C / -4°C . Feb: -1°C / -5°C . Mar: 2°C / -2°C . Apr: 6°C / 1°C . May: 11°C / 5°C . Jun: 16°C / 10°C . Jul: 19°C / 13°C . Aug: 18°C / 12°C . Sep: 15°C / 9°C . Oct: 8°C / 3°C . Nov: 2°C / -2°C . Dec: -1°C / -5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 286 mm. Feb: 204 mm. Mar: 168 mm. Apr: 162 mm. May: 187 mm. Jun: 158 mm. Jul: 178 mm. Aug: 251 mm. Sep: 313 mm. Oct: 342 mm. Nov: 258 mm. Dec: 290 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 80%. Feb: 77%. Mar: 77%. Apr: 80%. May: 82%. Jun: 81%. Jul: 84%. Aug: 85%. Sep: 85%. Oct: 85%. Nov: 81%. Dec: 80%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 12 km/h . Feb: 12 km/h . Mar: 11 km/h . Apr: 10 km/h . May: 10 km/h . Jun: 9 km/h . Jul: 9 km/h . Aug: 10 km/h . Sep: 11 km/h . Oct: 12 km/h . Nov: 12 km/h . Dec: 13 km/h .
Sunshine
Sunshine
Sunshine: Jan: 2h. Feb: 4h. Mar: 6h. Apr: 8h. May: 9h. Jun: 10h. Jul: 9h. Aug: 8h. Sep: 6h. Oct: 4h. Nov: 2h. Dec: 1h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 0. Feb: UV 1. Mar: UV 2. Apr: UV 3. May: UV 3. Jun: UV 4. Jul: UV 4. Aug: UV 4. Sep: UV 2. Oct: UV 1. Nov: UV 1. Dec: UV 0.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 23 days. Feb: 18 days. Mar: 19 days. Apr: 15 days. May: 5 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 9 days. Nov: 20 days. Dec: 22 days.
Climate Trends
Average highs have cooled by 1.5°C (2.7°F) across the available records. Average rainfall is trending wetter by about 41 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 19°C | Jul · 19°C |
| Coldest month | Dec 2025 · -12°C | Dec · -5°C |
| Wettest month | Sep 2025 · 423 mm | Oct · 342 mm |
| Windiest month | Dec 2025 · 14 km/h | Dec · 13 km/h |
Month-by-Month Weather Table
January
Wet 
February
Wet March
Poor April
Wet May
Wet June best
Wet July best
Wet August best
Wet September best
Wet October
Wet November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -1°C / -4°C | -4°C / -8°C | 21days (286 mm) Wet | 1.9h Poor | 80% Humid | 0.4 Low | Wet | View Details |
| February | -1°C / -5°C | -5°C / -9°C | 17days (204 mm) Wet | 4.2h Fair | 77% Humid | 1.2 Low | Wet | View Details |
| March | 2°C / -2°C | -1°C / -6°C | 17days (168 mm) Wet | 6.1h Fair | 77% Humid | 2.4 Moderate | Poor | View Details |
| April | 6°C / 1°C | 4°C / -2°C | 18days (162 mm) Wet | 7.7h Good | 80% Humid | 3.2 Moderate | Wet | View Details |
| May | 11°C / 5°C | 9°C / 2°C | 19days (187 mm) Wet | 8.9h Good | 82% Humid | 3.1 Moderate | Wet | View Details |
| June best | 16°C / 10°C | 16°C / 9°C | 20days (158 mm) Wet | 9.5h Good | 81% Humid | 4.1 Moderate | Wet | View Details |
| July best | 19°C / 13°C | 19°C / 13°C | 19days (178 mm) Wet | 8.9h Good | 84% Humid | 3.8 Moderate | Wet | View Details |
| August best | 18°C / 12°C | 19°C / 12°C | 19days (251 mm) Wet | 8h Good | 85% Humid | 3.8 Moderate | Wet | View Details |
| September best | 15°C / 9°C | 14°C / 7°C | 20days (313 mm) Wet | 5.8h Fair | 85% Humid | 1.9 Low | Wet | View Details |
| October | 8°C / 3°C | 6°C / 0°C | 22days (342 mm) Wet | 3.7h Poor | 85% Humid | 1.2 Low | Wet | View Details |
| November | 2°C / -2°C | -2°C / -6°C | 21days (258 mm) Wet | 2.2h Poor | 81% Humid | 0.5 Low | Wet | View Details |
| December | -1°C / -5°C | -5°C / -9°C | 20days (290 mm) Wet | 1.3h Poor | 80% Humid | 0.3 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Juneau are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Juneau, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Juneau is July, with average daytime highs of 19°C (66°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Juneau is December, with average overnight lows of -5°C (23°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Juneau is October, averaging 342mm of precipitation across 22 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Juneau runs through October, January, November, June, with the heaviest rainfall in October. Based on 10-year averages for Juneau.
Juneau receives approximately 68 sunshine hours per year. The sunniest month is June with around 10 hours. Based on climate data for Juneau.
The least favorable months to visit Juneau are January, February, March, October, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Juneau is 2, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Juneau is 81%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes, Juneau receives snow. Months with snowfall average 16 snow days and 91 cm (36 in) of accumulation, with about 14 frost days during winter.
Average wind speeds in Juneau are 11 km/h (7 mph). The windiest month is December with peak winds reaching 13 km/h (8 mph) (gusts up to 46 km/h / 29 mph).
Juneau averages 3 clear-sky days per month with overall cloud cover around 77%. The clearest skies occur in February.
The annual average dew point in Juneau is 2°C (36°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Juneau has a Warm-Summer Continental climate, classified as Dfb under the Köppen system. Continental climates experience extreme temperature ranges — hot summers and cold, snowy winters.
The 'feels like' temperature in Juneau ranges from 0°C (32°F) to 6°C (43°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
June is not the best time to visit Juneau, with a climate score of 5.8/10. Consider visiting during June, July, August, September instead for better conditions.
For June in Juneau, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. With average highs of 16°C (61°F) and 20 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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