Climate Insights for Chatham Seaplane Base

The climate in Chatham Seaplane Base is cool. The average annual temperature is 7°C and approximately 2063mm of precipitation falls per year. Chatham Seaplane Base receives a notable amount of rainfall throughout the year, including during its driest month. Chatham Seaplane Base 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 February, January, March, when temperatures can drop to -3°C. Chatham Seaplane Base experiences heavy snowfall, typically from January through December.

Temperatures in Chatham Seaplane Base vary considerably across the year, with a 21°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 18°C with a mean of 15°C. The coldest month is February, when overnight lows fall to -3°C and the daily average is 0°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between April and May, with a 4°C shift in average temperatures.

Chatham Seaplane Base is a very wet location, receiving approximately 2063mm of precipitation annually, which averages out to around 172mm per month. The wettest month is January, averaging 244mm of rainfall. December and October also tend to see above-average precipitation. The driest month is June, with just 105mm. That's 139mm less than January, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Chatham Seaplane Base receives heavy snowfall, accumulating around 331cm annually from January through December. The snowiest month is December, with approximately 71cm. Winter travel should account for significant snow cover.

Chatham Seaplane Base is mildly breezy, with an average annual wind speed of 13km/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 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, 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 4km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 14km/h in winter, 14km/h in spring, 12km/h in summer, 14km/h in autumn.

It is currently spring in Chatham Seaplane Base, which began on March 20, 2026. Chatham Seaplane Base 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 18°C, while the coldest stretch bottoms out in February near -3°C. Summer is next, beginning on June 21, 2026 — 92 days from now.

The table below shows monthly climate averages for Chatham Seaplane Base 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.