Climate Insights for Cooks Airport

Walla Walla County, South Dakota, United States

Hottest
July
32°C peak
Coldest
January
-9°C low
Wettest
May
79mm rain
Best to Visit
June, July, August
Mild temps & low rain

Climate Overview

The climate in Cooks Airport is cool. The average annual temperature is 9°C and approximately 474mm of precipitation falls per year. May is the wettest month, receiving around 79mm of rainfall. Cooks 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, December, when temperatures can drop to -9°C. Snowfall occurs from January to December, with around 78cm accumulating over the season.

Temperature

-10° 10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 2° Average: -5° Min: -9° Feb Max: 3° Average: -4° Min: -9° Mar Max: 10° Average: 2° Min: -3° Apr Max: 15° Average: 7° Min: 1° May Max: 21° Average: 14° Min: 8° Jun Max: 29° Average: 22° Min: 15° Jul Max: 32° Average: 25° Min: 18° Aug Max: 31° Average: 23° Min: 16° Sep Max: 27° Average: 19° Min: 12° Oct Max: 17° Average: 10° Min: 4° Nov Max: 10° Average: 3° Min: -2° Dec Max: 3° Average: -4° Min: -8°
Max
Average
Min

Cooks Airport has a wide annual temperature range, spanning 41°C from the coldest to warmest months. The warmest month is July, when average highs reach 32°C and the mean temperature sits around 25°C. The coldest month is January, when overnight lows fall to -9°C and the daily average is -5°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 9°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 10mm Snow: 7mm Feb Precipitation: 14mm Snow: 9mm Mar Precipitation: 31mm Snow: 16mm Apr Precipitation: 60mm Snow: 15mm May Precipitation: 79mm Snow: 4mm Jun Precipitation: 66mm Snow: 0mm Jul Precipitation: 60mm Snow: 0mm Aug Precipitation: 44mm Snow: 0mm Sep Precipitation: 35mm Snow: 0mm Oct Precipitation: 34mm Snow: 4mm Nov Precipitation: 14mm Snow: 6mm Dec Precipitation: 27mm Snow: 17mm
Precipitation
Snow

Cooks Airport is a relatively dry area, receiving approximately 474mm of precipitation annually, which averages out to around 40mm per month. The wettest month is May, averaging 79mm of rainfall. June and April also tend to see above-average precipitation. The driest month is January, with just 10mm. That's 68mm less than May, 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 78cm accumulating over the season. December typically sees the most snow at around 17cm.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h 30km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 23km/h Feb Wind Speed: 24km/h Mar Wind Speed: 26km/h Apr Wind Speed: 28km/h May Wind Speed: 26km/h Jun Wind Speed: 24km/h Jul Wind Speed: 23km/h Aug Wind Speed: 24km/h Sep Wind Speed: 24km/h Oct Wind Speed: 25km/h Nov Wind Speed: 24km/h Dec Wind Speed: 24km/h
Wind Speed

Cooks Airport is moderately windy, with an average annual wind speed of 25km/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 28km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 23km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.

Seasons

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

89 days until Summer

It is currently spring in Cooks Airport, which began on March 20, 2026. Cooks 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 32°C, while the coldest stretch bottoms out in January near -9°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from -3 to 21°C. Precipitation is moderate at around 170mm for the season, averaging 57mm per month. Winds are strong, averaging 27km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.

Summer

Temperatures range from 15 to 32°C. Precipitation is moderate at around 170mm for the season, averaging 57mm per month. Winds are moderate at around 24km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from -2 to 27°C. Rainfall is relatively light, with around 83mm over the season and a monthly average of 28mm. Expect around 10cm of snow accumulation during this period. Winds are moderate at around 24km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.

Winter

Temperatures range from -9 to 3°C. Rainfall is relatively light, with around 51mm over the season and a monthly average of 17mm. Expect around 34cm of snow accumulation during this period. Winds are moderate at around 24km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan -5°
Feb -4°
Mar
Apr
May 14°
Jun 22°
Jul 25°
Aug 23°
Sep 19°
Oct 10°
Nov
Dec -4°

The best time to visit Cooks Airport is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 51mm per month. By contrast, January can be quite cold with temperatures dropping to -9°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 Cooks 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
-9 °C
2 °C
23 km/h
10 mm
7 cm
Feb
-9 °C
3 °C
24 km/h
14 mm
9 cm
Mar Current
-3 °C
10 °C
26 km/h
31 mm
16 cm
Apr
1 °C
15 °C
28 km/h
60 mm
15 cm
May
8 °C
21 °C
26 km/h
79 mm
4 cm
Jun
15 °C
29 °C
24 km/h
66 mm
0 cm
Jul
18 °C
32 °C
23 km/h
60 mm
0 cm
Aug
16 °C
31 °C
24 km/h
44 mm
0 cm
Sep
12 °C
27 °C
24 km/h
35 mm
0 cm
Oct
4 °C
17 °C
25 km/h
34 mm
4 cm
Nov
-2 °C
10 °C
24 km/h
14 mm
6 cm
Dec
-8 °C
3 °C
24 km/h
27 mm
17 cm
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Metric (°C, km/h)