Climate Insights for Thompson Pass Airport

Chugach Census Area, Alaska, United States

Hottest
July
15°C peak
Coldest
January
-16°C low
Wettest
December
300mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Thompson Pass Airport is cold. The average annual temperature is -2°C and approximately 2099mm of precipitation falls per year. Thompson Pass Airport receives a notable amount of rainfall throughout the year, including during its driest month. Thompson Pass Airport 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, November, when temperatures can drop to -16°C. Thompson Pass Airport experiences heavy snowfall, typically from January through December.

Temperature

-20° -10° 10° 20° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: -10° Average: -13° Min: -16° Feb Max: -9° Average: -12° Min: -15° Mar Max: -6° Average: -10° Min: -12° Apr Max: 1° Average: -2° Min: -4° May Max: 5° Average: 2° Min: -1° Jun Max: 11° Average: 7° Min: 4° Jul Max: 15° Average: 10° Min: 7° Aug Max: 12° Average: 9° Min: 6° Sep Max: 8° Average: 5° Min: 2° Oct Max: 0° Average: -3° Min: -6° Nov Max: -7° Average: -10° Min: -13° Dec Max: -8° Average: -10° Min: -13°
Max
Average
Min

Temperatures in Thompson Pass Airport vary considerably across the year, with a 31°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 15°C with a mean of 10°C. January brings the harshest conditions, with lows dropping to -16°C and an average temperature of -13°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between March and April, with a 8°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 188mm Snow: 186mm Feb Precipitation: 148mm Snow: 147mm Mar Precipitation: 141mm Snow: 138mm Apr Precipitation: 113mm Snow: 107mm May Precipitation: 143mm Snow: 97mm Jun Precipitation: 115mm Snow: 15mm Jul Precipitation: 108mm Snow: 1mm Aug Precipitation: 192mm Snow: 2mm Sep Precipitation: 215mm Snow: 46mm Oct Precipitation: 241mm Snow: 175mm Nov Precipitation: 195mm Snow: 179mm Dec Precipitation: 300mm Snow: 293mm
Precipitation
Snow

Thompson Pass Airport is a very wet location, receiving approximately 2099mm of precipitation annually, which averages out to around 175mm per month. The wettest month is December, averaging 300mm of rainfall. October and September also tend to see above-average precipitation. The driest month is July, with just 108mm. That's 192mm less than December, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Thompson Pass Airport receives heavy snowfall, accumulating around 1385cm annually from January through December. The snowiest month is December, with approximately 293cm. 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: 1km/h Feb Wind Speed: 1km/h Mar Wind Speed: 1km/h Apr Wind Speed: 1km/h May Wind Speed: 1km/h Jun Wind Speed: 1km/h Jul Wind Speed: 1km/h Aug Wind Speed: 1km/h Sep Wind Speed: 1km/h Oct Wind Speed: 1km/h Nov Wind Speed: 1km/h Dec Wind Speed: 1km/h
Wind Speed

Thompson Pass Airport is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 1km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 0km/h gap between the calmest and windiest months.

Seasons

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

70 days until Autumn

It is currently summer in Thompson Pass Airport, which began on June 21, 2026. Thompson Pass Airport 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 -16°C. Autumn is next, beginning on September 23, 2026 — 70 days from now.

Spring

Temperatures range from -12 to 5°C. Rainfall is heavy, totalling around 398mm across the season with a monthly average of 133mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 4 to 15°C. Rainfall is heavy, totalling around 414mm across the season with a monthly average of 138mm. Winds are generally light, averaging 1km/h. Comfortable clothing with a light layer for cooler evenings is all you need.

Autumn

Temperatures range from -13 to 8°C. Rainfall is heavy, totalling around 651mm across the season with a monthly average of 217mm. Expect around 399cm of snow accumulation during this period. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -16 to -8°C. Rainfall is heavy, totalling around 636mm across the season with a monthly average of 212mm. Expect around 626cm of snow accumulation during this period. Winds are generally light, averaging 1km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.

Monthly Climate Data

The table below shows monthly climate averages for Thompson Pass Airport 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
-16 °C
-10 °C
1 km/h
188 mm
186 cm
Feb
-15 °C
-9 °C
1 km/h
148 mm
147 cm
Mar
-12 °C
-6 °C
1 km/h
141 mm
138 cm
Apr
-4 °C
1 °C
1 km/h
113 mm
107 cm
May
-1 °C
5 °C
1 km/h
143 mm
97 cm
Jun
4 °C
11 °C
1 km/h
115 mm
15 cm
Jul Current
7 °C
15 °C
1 km/h
108 mm
1 cm
Aug
6 °C
12 °C
1 km/h
192 mm
2 cm
Sep
2 °C
8 °C
1 km/h
215 mm
46 cm
Oct
-6 °C
0 °C
1 km/h
241 mm
175 cm
Nov
-13 °C
-7 °C
1 km/h
195 mm
179 cm
Dec
-13 °C
-8 °C
1 km/h
300 mm
293 cm
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