Climate Overview
The climate in Sweetwater (US Marine Corps) Airport is cool. The average annual temperature is 7°C and approximately 549mm of precipitation falls per year. January is the wettest month, receiving around 114mm of rainfall. Sweetwater (US Marine Corps) 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, February, January, when temperatures can drop to -8°C. Sweetwater (US Marine Corps) Airport experiences heavy snowfall, typically from January through December.
Temperature
Sweetwater (US Marine Corps) Airport has a wide annual temperature range, spanning 36°C from the coldest to warmest months. The warmest month is July, when average highs reach 28°C and the mean temperature sits around 20°C. The coldest month is December, when overnight lows fall to -8°C and the daily average is -3°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between May and June, with a 7°C shift in average temperatures.
Precipitation
Sweetwater (US Marine Corps) Airport is a relatively dry area, receiving approximately 549mm of precipitation annually, which averages out to around 46mm per month. The wettest month is January, averaging 114mm of rainfall. February and March also tend to see above-average precipitation. The driest month is August, with just 11mm. That's 103mm 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. Sweetwater (US Marine Corps) Airport receives heavy snowfall, accumulating around 368cm annually from January through December. The snowiest month is January, with approximately 98cm. Winter travel should account for significant snow cover.
Wind
Sweetwater (US Marine Corps) 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 June, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, 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 0km/h between the calmest and windiest months.
Seasons
71 days until Autumn
It is currently summer in Sweetwater (US Marine Corps) Airport, which began on June 21, 2026. Sweetwater (US Marine Corps) 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 28°C, while the coldest stretch bottoms out in December near -8°C. Autumn is next, beginning on September 23, 2026 — 71 days from now.
Spring
Temperatures range from -5 to 16°C. Precipitation is moderate at around 175mm for the season, averaging 58mm per month. 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 8 to 28°C. Precipitation is minimal, with only around 42mm for the entire season. Winds are generally light, averaging 2km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -3 to 23°C. Rainfall is relatively light, with around 74mm over the season and a monthly average of 25mm. Expect around 36cm 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 -8 to 4°C. Precipitation is moderate at around 258mm for the season, averaging 86mm per month. Expect around 219cm of snow accumulation during this period. Winds are generally light, averaging 2km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Best Time to Visit
The best time to visit Sweetwater (US Marine Corps) Airport is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 14mm per month. By contrast, December can be quite cold with temperatures dropping to -8°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 Sweetwater (US Marine Corps) 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.
