Climate Insights for Collegeville

The climate in Collegeville is cool. The average annual temperature is 7°C and approximately 800mm of precipitation falls per year. August is the wettest month, receiving around 120mm of rainfall. Collegeville 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 February, January, December, when temperatures can drop to -13°C. Snowfall occurs from January to December, with around 88cm accumulating over the season.

Collegeville has a wide annual temperature range, spanning 41°C from the coldest to warmest months. The warmest month is July, when average highs reach 28°C and the mean temperature sits around 23°C. The coldest month is February, when overnight lows fall to -13°C and the daily average is -8°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 9°C shift in average temperatures.

Collegeville is a relatively dry area, receiving approximately 800mm of precipitation annually, which averages out to around 67mm per month. The wettest month is August, averaging 120mm of rainfall. July and May also tend to see above-average precipitation. The driest month is January, with just 18mm. That's 102mm 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. Snowfall is a regular feature from January to December, with around 88cm accumulating over the season. December typically sees the most snow at around 20cm.

Collegeville is mildly breezy, with an average annual wind speed of 19km/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 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 17km/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.

It is currently spring in Collegeville, which began on March 20, 2026. Collegeville 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 28°C, while the coldest stretch bottoms out in February near -13°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Collegeville is during June, July and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 89mm per month. By contrast, February can be quite cold with temperatures dropping to -13°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 Collegeville 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.