Climate Insights for Green River

The climate in Green River is cool. The average annual temperature is 7°C and approximately 281mm of precipitation falls per year. May is the wettest month, receiving around 41mm of rainfall. Green River 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 -12°C. Snowfall occurs from January to December, with around 136cm accumulating over the season.

Green River has a wide annual temperature range, spanning 43°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 January, when overnight lows fall to -12°C and the daily average is -8°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 9°C shift in average temperatures.

Green River is a quite dry location, receiving approximately 281mm of precipitation annually, which averages out to around 23mm per month. The wettest month is May, averaging 41mm of rainfall. March and April also tend to see above-average precipitation. The driest month is July, with just 7mm. That's 35mm less than May, 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 136cm accumulating over the season. March typically sees the most snow at around 30cm.

Green River is mildly breezy, with an average annual wind speed of 12km/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 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently summer in Green River, which began on June 21, 2026. Green River 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 January near -12°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Green River 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 13mm per month. By contrast, January can be quite cold with temperatures dropping to -12°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Green River 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.