Climate Insights for Hansen Airport

Walla Walla County, California, United States

Hottest
July
37°C peak
Coldest
December
4°C low
Wettest
January
34mm rain
Best to Visit
April, May, October
Mild temps & low rain

Climate Overview

The climate in Hansen Airport is warm and mild. The average annual temperature is 18°C and approximately 162mm of precipitation falls per year. January is the wettest month, receiving around 34mm of rainfall. Hansen 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 December, January, February, when temperatures can drop to 4°C.

Temperature

10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 15° Average: 9° Min: 5° Feb Max: 17° Average: 11° Min: 6° Mar Max: 20° Average: 13° Min: 8° Apr Max: 25° Average: 17° Min: 11° May Max: 28° Average: 20° Min: 14° Jun Max: 34° Average: 27° Min: 20° Jul Max: 37° Average: 30° Min: 23° Aug Max: 37° Average: 29° Min: 22° Sep Max: 33° Average: 25° Min: 18° Oct Max: 27° Average: 19° Min: 13° Nov Max: 19° Average: 12° Min: 7° Dec Max: 15° Average: 9° Min: 4°
Max
Average
Min

Temperatures in Hansen Airport vary considerably across the year, with a 33°C difference between the coldest and warmest months. July is the hottest month, with daytime highs reaching 37°C and an average of 30°C. December is the coolest month, with minimum temperatures around 4°C and an average of 9°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Precipitation

0mm 25mm 50mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 34mm Snow: 0mm Feb Precipitation: 31mm Snow: 1mm Mar Precipitation: 27mm Snow: 0mm Apr Precipitation: 9mm Snow: 0mm May Precipitation: 3mm Snow: 0mm Jun Precipitation: 2mm Snow: 0mm Jul Precipitation: 6mm Snow: 0mm Aug Precipitation: 8mm Snow: 0mm Sep Precipitation: 2mm Snow: 0mm Oct Precipitation: 4mm Snow: 0mm Nov Precipitation: 8mm Snow: 1mm Dec Precipitation: 28mm Snow: 2mm
Precipitation
Snow

Hansen Airport is a quite dry location, receiving approximately 162mm of precipitation annually, which averages out to around 14mm per month. The wettest month is January, averaging 34mm of rainfall. February and December also tend to see above-average precipitation. The driest month is September, with just 2mm. That's 32mm less than January, 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.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 19km/h Feb Wind Speed: 21km/h Mar Wind Speed: 23km/h Apr Wind Speed: 25km/h May Wind Speed: 24km/h Jun Wind Speed: 24km/h Jul Wind Speed: 22km/h Aug Wind Speed: 21km/h Sep Wind Speed: 19km/h Oct Wind Speed: 18km/h Nov Wind Speed: 19km/h Dec Wind Speed: 17km/h
Wind Speed

Hansen Airport is moderately windy, with an average annual wind speed of 21km/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 25km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in December, with average winds dropping to 17km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 8km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 19km/h in winter, 24km/h in spring, 22km/h in summer, 19km/h in autumn.

Seasons

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

82 days until Summer

It is currently spring in Hansen Airport, which began on March 20, 2026. Hansen 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 37°C, while the coldest stretch bottoms out in December near 4°C. Summer is next, beginning on June 21, 2026 — 82 days from now.

Spring

Temperatures range from 8 to 28°C. Precipitation is minimal, with only around 39mm for the entire season. Winds are moderate at around 24km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.

Summer

Temperatures range from 20 to 37°C. Precipitation is minimal, with only around 16mm for the entire season. Winds are moderate at around 22km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 7 to 33°C. Precipitation is minimal, with only around 14mm for the entire season. Winds are moderate at around 19km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.

Winter

Temperatures range from 4 to 17°C. Rainfall is relatively light, with around 93mm over the season and a monthly average of 31mm. Winds are moderate at around 19km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Best Time to Visit

Jan
Feb 11°
Mar 13°
Apr 17°
May 20°
Jun 27°
Jul 30°
Aug 29°
Sep 25°
Oct 19°
Nov 12°
Dec

The best time to visit Hansen Airport is during April, May and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 6mm per month. By contrast, July can be uncomfortably hot with highs reaching 37°C, while December is the coldest period with lows dropping to 4°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

Monthly Climate Data

The table below shows monthly climate averages for Hansen 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. 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
5 °C
15 °C
19 km/h
34 mm
0 cm
Feb
6 °C
17 °C
21 km/h
31 mm
1 cm
Mar Current
8 °C
20 °C
23 km/h
27 mm
0 cm
Apr
11 °C
25 °C
25 km/h
9 mm
0 cm
May
14 °C
28 °C
24 km/h
3 mm
0 cm
Jun
20 °C
34 °C
24 km/h
2 mm
0 cm
Jul
23 °C
37 °C
22 km/h
6 mm
0 cm
Aug
22 °C
37 °C
21 km/h
8 mm
0 cm
Sep
18 °C
33 °C
19 km/h
2 mm
0 cm
Oct
13 °C
27 °C
18 km/h
4 mm
0 cm
Nov
7 °C
19 °C
19 km/h
8 mm
1 cm
Dec
4 °C
15 °C
17 km/h
28 mm
2 cm
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Metric (°C, km/h)