Climate Insights for Perry Island Seaplane Base

Chugach Census Area, Alaska, United States

Hottest
July
15°C peak
Coldest
January
0°C low
Wettest
August
490mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Perry Island Seaplane Base is cool. The average annual temperature is 7°C and approximately 4200mm of precipitation falls per year. Perry Island Seaplane Base receives a notable amount of rainfall throughout the year, including during its driest month. Perry Island Seaplane Base is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, March, when temperatures can drop to 0°C. Perry Island Seaplane Base experiences heavy snowfall, typically from January through December.

Temperature

10° 15° 20° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 2° Average: 1° Min: 0° Feb Max: 2° Average: 1° Min: 0° Mar Max: 3° Average: 2° Min: 1° Apr Max: 6° Average: 4° Min: 4° May Max: 9° Average: 7° Min: 7° Jun Max: 13° Average: 11° Min: 10° Jul Max: 15° Average: 14° Min: 13° Aug Max: 15° Average: 14° Min: 13° Sep Max: 12° Average: 11° Min: 10° Oct Max: 8° Average: 7° Min: 6° Nov Max: 5° Average: 4° Min: 3° Dec Max: 4° Average: 3° Min: 2°
Max
Average
Min

Perry Island Seaplane Base sees moderate temperature variation throughout the year, ranging from 0°C to 15°C. July is the warmest month, though highs remain moderate at 15°C with a mean of 14°C. The coldest month is January, when overnight lows fall to 0°C and the daily average is 1°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between September and October, with a 4°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm 400mm 450mm 500mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 347mm Snow: 135mm Feb Precipitation: 261mm Snow: 139mm Mar Precipitation: 275mm Snow: 117mm Apr Precipitation: 278mm Snow: 60mm May Precipitation: 326mm Snow: 13mm Jun Precipitation: 199mm Snow: 0mm Jul Precipitation: 232mm Snow: 0mm Aug Precipitation: 490mm Snow: 0mm Sep Precipitation: 473mm Snow: 0mm Oct Precipitation: 444mm Snow: 11mm Nov Precipitation: 398mm Snow: 72mm Dec Precipitation: 478mm Snow: 160mm
Precipitation
Snow

Perry Island Seaplane Base is a very wet location, receiving approximately 4200mm of precipitation annually, which averages out to around 350mm per month. The wettest month is August, averaging 490mm of rainfall. December and September also tend to see above-average precipitation. The driest month is June, with just 199mm. That's 292mm less than August, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Perry Island Seaplane Base receives heavy snowfall, accumulating around 709cm annually from January through December. The snowiest month is December, with approximately 160cm. Winter travel should account for significant snow cover.

Wind

0km/h 5km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 5km/h Feb Wind Speed: 5km/h Mar Wind Speed: 4km/h Apr Wind Speed: 4km/h May Wind Speed: 4km/h Jun Wind Speed: 3km/h Jul Wind Speed: 3km/h Aug Wind Speed: 4km/h Sep Wind Speed: 4km/h Oct Wind Speed: 5km/h Nov Wind Speed: 5km/h Dec Wind Speed: 5km/h
Wind Speed

Perry Island Seaplane Base is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

77 days until Autumn

It is currently summer in Perry Island Seaplane Base, which began on June 21, 2026. Perry Island Seaplane Base is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 15°C, while the coldest stretch bottoms out in January near 0°C. Autumn is next, beginning on September 23, 2026 — 77 days from now.

Spring

Temperatures range from 1 to 9°C. Rainfall is heavy, totalling around 880mm across the season with a monthly average of 293mm. Winds are generally light, averaging 4km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 10 to 15°C. Rainfall is heavy, totalling around 921mm across the season with a monthly average of 307mm. Winds are generally light, averaging 3km/h. Comfortable clothing with a light layer for cooler evenings is all you need.

Autumn

Temperatures range from 3 to 12°C. Rainfall is heavy, totalling around 1314mm across the season with a monthly average of 438mm. Expect around 83cm of snow accumulation during this period. Winds are generally light, averaging 5km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 0 to 4°C. Rainfall is heavy, totalling around 1086mm across the season with a monthly average of 362mm. Expect around 434cm of snow accumulation during this period. Winds are generally light, averaging 5km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Monthly Climate Data

The table below shows monthly climate averages for Perry Island Seaplane Base based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
0 °C
2 °C
5 km/h
347 mm
135 cm
Feb
0 °C
2 °C
5 km/h
261 mm
139 cm
Mar
1 °C
3 °C
4 km/h
275 mm
117 cm
Apr
4 °C
6 °C
4 km/h
278 mm
60 cm
May
7 °C
9 °C
4 km/h
326 mm
13 cm
Jun
10 °C
13 °C
3 km/h
199 mm
0 cm
Jul Current
13 °C
15 °C
3 km/h
232 mm
0 cm
Aug
13 °C
15 °C
4 km/h
490 mm
0 cm
Sep
10 °C
12 °C
4 km/h
473 mm
0 cm
Oct
6 °C
8 °C
5 km/h
444 mm
11 cm
Nov
3 °C
5 °C
5 km/h
398 mm
72 cm
Dec
2 °C
4 °C
5 km/h
478 mm
160 cm
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