Climate Insights for Charter Oak

The climate in Charter Oak is temperate. The average annual temperature is 17°C and approximately 417mm of precipitation falls per year. January is the wettest month, receiving around 91mm of rainfall. Charter Oak is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are December, January, February, when temperatures can drop to 6°C. Light snow can occur between January and December.

Temperatures in Charter Oak vary considerably across the year, with a 26°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 32°C and the mean temperature sits around 25°C. December is the coolest month, with minimum temperatures around 6°C and an average of 10°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 5°C shift in average temperatures.

Charter Oak is a relatively dry area, receiving approximately 417mm of precipitation annually, which averages out to around 35mm per month. The wettest month is January, averaging 91mm of rainfall. March and February also tend to see above-average precipitation. The driest month is June, with just 4mm. That's 87mm 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. Light snowfall can occur between January and December, totalling around 11cm annually. February is the snowiest month with approximately 4cm.

Charter Oak is relatively calm, with an average annual wind speed of 11km/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 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently spring in Charter Oak, which began on March 20, 2026. Charter Oak 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 32°C, while the coldest stretch bottoms out in December near 6°C. Summer is next, beginning on June 21, 2026 — 92 days from now.

The best time to visit Charter Oak is during May, June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 10mm per month. By contrast, December can be quite cold with temperatures dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Charter Oak 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.