Climate Insights for Helena Valley Southeast

The climate in Helena Valley Southeast is cool. The average annual temperature is 5°C and approximately 585mm of precipitation falls per year. June is the wettest month, receiving around 98mm of rainfall. Helena Valley Southeast is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are February, December, January, when temperatures can drop to -11°C. Helena Valley Southeast experiences heavy snowfall, typically from January through December.

Helena Valley Southeast has a wide annual temperature range, spanning 38°C from the coldest to warmest months. The warmest month is August, when average highs reach 27°C and the mean temperature sits around 18°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 8°C shift in average temperatures.

Helena Valley Southeast is a relatively dry area, receiving approximately 585mm of precipitation annually, which averages out to around 49mm per month. The wettest month is June, averaging 98mm of rainfall. May and April also tend to see above-average precipitation. The driest month is August, with just 20mm. That's 78mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Helena Valley Southeast receives heavy snowfall, accumulating around 236cm annually from January through December. The snowiest month is February, with approximately 39cm. Winter travel should account for significant snow cover.

Helena Valley Southeast 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 October, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, 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.

It is currently spring in Helena Valley Southeast, which began on March 20, 2026. Helena Valley Southeast 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 August at around 27°C, while the coldest stretch bottoms out in February near -11°C. Summer is next, beginning on June 21, 2026 — 4 days from now.

The best time to visit Helena Valley Southeast is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 27mm per month. By contrast, February can be quite cold with temperatures dropping to -11°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Helena Valley Southeast 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.