Climate Insights for Seymchan

The climate in Seymchan is cold. The average annual temperature is -8°C and approximately 474mm of precipitation falls per year. August is the wettest month, receiving around 75mm of rainfall. Seymchan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, December, February, when temperatures can drop to -37°C. Seymchan experiences heavy snowfall, typically from January through December.

Seymchan has a wide annual temperature range, spanning 60°C from the coldest to warmest months. July is the warmest month, though highs remain moderate at 23°C with a mean of 17°C. January brings the harshest conditions, with lows dropping to -37°C and an average temperature of -34°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 14°C shift in average temperatures.

Seymchan is a relatively dry area, receiving approximately 474mm of precipitation annually, which averages out to around 39mm per month. The wettest month is August, averaging 75mm of rainfall. July and September also tend to see above-average precipitation. The driest month is April, with just 13mm. That's 63mm less than August, 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. Seymchan receives heavy snowfall, accumulating around 220cm annually from January through December. The snowiest month is November, with approximately 46cm. Winter travel should account for significant snow cover.

Seymchan 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 May, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Seymchan, which began on June 21, 2026. Seymchan 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 23°C, while the coldest stretch bottoms out in January near -37°C. Autumn is next, beginning on September 23, 2026 — 81 days from now.

The best time to visit Seymchan is during July, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 74mm per month. By contrast, January can be quite cold with temperatures dropping to -37°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 Seymchan 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.