Climate Insights for Saint Helen

The climate in Saint Helen is cool. The average annual temperature is 8°C and approximately 979mm of precipitation falls per year. Saint Helen receives a notable amount of rainfall throughout the year, including during its driest month. Saint Helen 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 184cm accumulating over the season.

Saint Helen has a wide annual temperature range, spanning 37°C from the coldest to warmest months. The warmest month is July, when average highs reach 28°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -9°C and the daily average is -6°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 8°C shift in average temperatures.

Saint Helen is a moderately rainy area, receiving approximately 979mm of precipitation annually, which averages out to around 82mm per month. The wettest month is October, averaging 124mm of rainfall. August and May also tend to see above-average precipitation. The driest month is February, with just 57mm. That's 68mm less than October, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 184cm accumulating over the season. January typically sees the most snow at around 40cm.

Saint Helen is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/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 summer in Saint Helen, which began on June 21, 2026. Saint Helen 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 January near -9°C. Autumn is next, beginning on September 23, 2026 — 74 days from now.

The best time to visit Saint Helen is during June, July and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 82mm per month. By contrast, January can be quite cold with temperatures dropping to -9°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Saint Helen 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.