Climate Insights for Ralph M Calhoun Memorial Airport

Yukon-Koyukuk Census Area, Alaska, United States

Hottest
July
23°C peak
Coldest
January
-24°C low
Wettest
August
106mm rain
Best to Visit
June, July
Mild temps & low rain

Climate Overview

The climate in Ralph M Calhoun Memorial Airport is cold. The average annual temperature is -1°C and approximately 517mm of precipitation falls per year. August is the wettest month, receiving around 106mm of rainfall. Ralph M Calhoun Memorial Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, December, February, when temperatures can drop to -24°C. Snowfall occurs from January to December, with around 150cm accumulating over the season.

Temperature

-30° -20° -10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: -17° Average: -21° Min: -24° Feb Max: -11° Average: -16° Min: -19° Mar Max: -5° Average: -11° Min: -15° Apr Max: 5° Average: 0° Min: -5° May Max: 16° Average: 10° Min: 5° Jun Max: 21° Average: 16° Min: 11° Jul Max: 23° Average: 18° Min: 13° Aug Max: 18° Average: 14° Min: 10° Sep Max: 12° Average: 8° Min: 5° Oct Max: 3° Average: -1° Min: -4° Nov Max: -10° Average: -13° Min: -16° Dec Max: -14° Average: -17° Min: -20°
Max
Average
Min

Ralph M Calhoun Memorial Airport has a wide annual temperature range, spanning 47°C from the coldest to warmest months. July is the warmest month, though highs remain moderate at 23°C with a mean of 18°C. January brings the harshest conditions, with lows dropping to -24°C and an average temperature of -21°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between October and November, with a 12°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm 125mm 150mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 14mm Snow: 14mm Feb Precipitation: 26mm Snow: 26mm Mar Precipitation: 21mm Snow: 19mm Apr Precipitation: 28mm Snow: 15mm May Precipitation: 36mm Snow: 1mm Jun Precipitation: 54mm Snow: 0mm Jul Precipitation: 65mm Snow: 0mm Aug Precipitation: 106mm Snow: 0mm Sep Precipitation: 66mm Snow: 0mm Oct Precipitation: 40mm Snow: 14mm Nov Precipitation: 34mm Snow: 34mm Dec Precipitation: 27mm Snow: 27mm
Precipitation
Snow

Ralph M Calhoun Memorial Airport is a relatively dry area, receiving approximately 517mm of precipitation annually, which averages out to around 43mm per month. The wettest month is August, averaging 106mm of rainfall. September and July also tend to see above-average precipitation. The driest month is January, with just 14mm. That's 92mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 150cm accumulating over the season. November typically sees the most snow at around 34cm.

Wind

0km/h 5km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 3km/h Feb Wind Speed: 3km/h Mar Wind Speed: 2km/h Apr Wind Speed: 3km/h May Wind Speed: 2km/h Jun Wind Speed: 2km/h Jul Wind Speed: 2km/h Aug Wind Speed: 2km/h Sep Wind Speed: 2km/h Oct Wind Speed: 3km/h Nov Wind Speed: 2km/h Dec Wind Speed: 3km/h
Wind Speed

Ralph M Calhoun Memorial Airport is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

Seasons

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

75 days until Autumn

It is currently summer in Ralph M Calhoun Memorial Airport, which began on June 21, 2026. Ralph M Calhoun Memorial 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 23°C, while the coldest stretch bottoms out in January near -24°C. Autumn is next, beginning on September 23, 2026 — 75 days from now.

Spring

Temperatures range from -15 to 16°C. Rainfall is relatively light, with around 85mm over the season and a monthly average of 28mm. Winds are generally light, averaging 2km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.

Summer

Temperatures range from 10 to 23°C. Precipitation is moderate at around 225mm for the season, averaging 75mm per month. Winds are generally light, averaging 2km/h. Comfortable clothing with a light layer for cooler evenings is all you need.

Autumn

Temperatures range from -16 to 12°C. Rainfall is relatively light, with around 140mm over the season and a monthly average of 47mm. Expect around 48cm of snow accumulation during this period. Winds are generally light, averaging 2km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.

Winter

Temperatures range from -24 to -11°C. Rainfall is relatively light, with around 67mm over the season and a monthly average of 22mm. Expect around 66cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.

Best Time to Visit

Jan -21°
Feb -16°
Mar -11°
Apr
May 10°
Jun 16°
Jul 18°
Aug 14°
Sep
Oct -1°
Nov -13°
Dec -17°

The best time to visit Ralph M Calhoun Memorial Airport is during June and July, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 60mm per month. By contrast, January can be quite cold with temperatures dropping to -24°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

Monthly Climate Data

The table below shows monthly climate averages for Ralph M Calhoun Memorial 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
-24 °C
-17 °C
3 km/h
14 mm
14 cm
Feb
-19 °C
-11 °C
3 km/h
26 mm
26 cm
Mar
-15 °C
-5 °C
2 km/h
21 mm
19 cm
Apr
-5 °C
5 °C
3 km/h
28 mm
15 cm
May
5 °C
16 °C
2 km/h
36 mm
1 cm
Jun
11 °C
21 °C
2 km/h
54 mm
0 cm
Jul Current
13 °C
23 °C
2 km/h
65 mm
0 cm
Aug
10 °C
18 °C
2 km/h
106 mm
0 cm
Sep
5 °C
12 °C
2 km/h
66 mm
0 cm
Oct
-4 °C
3 °C
3 km/h
40 mm
14 cm
Nov
-16 °C
-10 °C
2 km/h
34 mm
34 cm
Dec
-20 °C
-14 °C
3 km/h
27 mm
27 cm
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