Climate Insights for Sishen

The climate in Sishen is warm and mild. The average annual temperature is 19°C and approximately 329mm of precipitation falls per year. Januar is the wettest month, receiving around 74mm of rainfall. Sishen is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: Dezember, Januar, November. The coldest months are Juli, Juni, August, when temperatures can drop to 2°C.

Temperatures in Sishen vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is Dezember, when average highs reach 33°C and the mean temperature sits around 26°C. Juli is the coolest month, with minimum temperatures around 2°C and an average of 11°C. The average daily temperature swing is 17°C, meaning significant differences between daytime and nighttime temperatures. The sharpest temperature change occurs between August and September, with a 5°C shift in average temperatures.

Sishen is a quite dry location, receiving approximately 329mm of precipitation annually, which averages out to around 27mm per month. The wettest month is January, averaging 74mm of rainfall. February and March also tend to see above-average precipitation. The driest month is July, with just 2mm. That's 72mm 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.

Sishen is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.

It is currently winter in Sishen, which began on June 21, 2026. Sishen is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in Dezember at around 33°C, while the coldest stretch bottoms out in Juli near 2°C. Autumn is next, beginning on March 20, 2026 — 2 days from now.

The best time to visit Sishen is during Februar, März, April, September, Oktober and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 31mm per month. By contrast, Dezember can be uncomfortably hot with highs reaching 33°C, while Juli is the coldest period with lows dropping to 2°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Sishen 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. 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.