Climate Insights for Circle Town County Airport

San Juan County, Montana, United States

Hottest
July
31°C peak
Coldest
February
-11°C low
Wettest
June
73mm rain
Best to Visit
June, July, August
Mild temps & low rain

Climate Overview

The climate in Circle Town County Airport is cool. The average annual temperature is 7°C and approximately 386mm of precipitation falls per year. June is the wettest month, receiving around 73mm of rainfall. Circle Town County 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 February, January, December, when temperatures can drop to -11°C. Snowfall occurs from January to December, with around 69cm accumulating over the season.

Temperature

-20° -10° 10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: -1° Average: -6° Min: -10° Feb Max: -1° Average: -7° Min: -11° Mar Max: 7° Average: 0° Min: -4° Apr Max: 14° Average: 6° Min: 1° May Max: 20° Average: 13° Min: 7° Jun Max: 26° Average: 19° Min: 13° Jul Max: 31° Average: 23° Min: 16° Aug Max: 30° Average: 22° Min: 15° Sep Max: 24° Average: 16° Min: 10° Oct Max: 14° Average: 7° Min: 3° Nov Max: 6° Average: 0° Min: -3° Dec Max: 0° Average: -5° Min: -9°
Max
Average
Min

Circle Town County Airport has a wide annual temperature range, spanning 42°C from the coldest to warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 23°C. The coldest month is February, when overnight lows fall to -11°C and the daily average is -7°C. On average, daily temperatures fluctuate by about 12°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: 12mm Snow: 8mm Feb Precipitation: 20mm Snow: 13mm Mar Precipitation: 17mm Snow: 8mm Apr Precipitation: 36mm Snow: 11mm May Precipitation: 59mm Snow: 1mm Jun Precipitation: 73mm Snow: 0mm Jul Precipitation: 28mm Snow: 0mm Aug Precipitation: 30mm Snow: 0mm Sep Precipitation: 43mm Snow: 0mm Oct Precipitation: 33mm Snow: 7mm Nov Precipitation: 17mm Snow: 8mm Dec Precipitation: 18mm Snow: 12mm
Precipitation
Snow

Circle Town County Airport is a quite dry location, receiving approximately 386mm of precipitation annually, which averages out to around 32mm per month. The wettest month is June, averaging 73mm of rainfall. May and September also tend to see above-average precipitation. The driest month is January, with just 12mm. That's 60mm less than June, 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 69cm accumulating over the season. February typically sees the most snow at around 13cm.

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: 25km/h Mar Wind Speed: 25km/h Apr Wind Speed: 28km/h May Wind Speed: 25km/h Jun Wind Speed: 25km/h Jul Wind Speed: 23km/h Aug Wind Speed: 23km/h Sep Wind Speed: 24km/h Oct Wind Speed: 25km/h Nov Wind Speed: 25km/h Dec Wind Speed: 24km/h
Wind Speed

Circle Town County 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

91 days until Summer

It is currently spring in Circle Town County Airport, which began on March 20, 2026. Circle Town County 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 31°C, while the coldest stretch bottoms out in February near -11°C. Summer is next, beginning on June 21, 2026 — 91 days from now.

Spring

Temperatures range from -4 to 20°C. Rainfall is relatively light, with around 112mm over the season and a monthly average of 37mm. Winds are strong, averaging 26km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.

Summer

Temperatures range from 13 to 31°C. Rainfall is relatively light, with around 131mm over the season and a monthly average of 44mm. Winds are moderate at around 24km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from -3 to 24°C. Rainfall is relatively light, with around 93mm over the season and a monthly average of 31mm. Expect around 14cm of snow accumulation during this period. Winds are moderate at around 25km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.

Winter

Temperatures range from -11 to 0°C. Rainfall is relatively light, with around 50mm 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. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.

Best Time to Visit

Jan -6°
Feb -7°
Mar
Apr
May 13°
Jun 19°
Jul 23°
Aug 22°
Sep 16°
Oct
Nov
Dec -5°

The best time to visit Circle Town County Airport is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 43mm per month. By contrast, February can be quite cold with temperatures dropping to -11°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 Circle Town County 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
-10 °C
-1 °C
23 km/h
12 mm
8 cm
Feb
-11 °C
-1 °C
25 km/h
20 mm
13 cm
Mar Current
-4 °C
7 °C
25 km/h
17 mm
8 cm
Apr
1 °C
14 °C
28 km/h
36 mm
11 cm
May
7 °C
20 °C
25 km/h
59 mm
1 cm
Jun
13 °C
26 °C
25 km/h
73 mm
0 cm
Jul
16 °C
31 °C
23 km/h
28 mm
0 cm
Aug
15 °C
30 °C
23 km/h
30 mm
0 cm
Sep
10 °C
24 °C
24 km/h
43 mm
0 cm
Oct
3 °C
14 °C
25 km/h
33 mm
7 cm
Nov
-3 °C
6 °C
25 km/h
17 mm
8 cm
Dec
-9 °C
0 °C
24 km/h
18 mm
12 cm
Airpult

Get accurate weather forecasts worldwide with real-time updates and severe weather alerts. Covering 6M+ locations with precise, reliable weather data.

© 2026 Samuenti GmbH. All rights reserved.

English
Metric (°C, km/h)