Chilliwack

Planning a trip or just curious about the weather in Chilliwack? Here you will find the latest information on weather conditions, as well as up-to-date forecasts and helpful charts.

The climate in Chilliwack, Canada, can be described as temperate, with four distinct seasons. The city experiences noticeable fluctuations in temperature and precipitation throughout the year, typical for regions with a moderate maritime or coastal influence, given the number of rainy days even in the drier months.

Summers in Chilliwack, especially in July and August, are quite warm and relatively dry, with average temperatures around 17-18°C and minimal rainfall. Winters, on the other hand, are cool and significantly wetter. January and December are the coldest months with average temperatures around 0°C, and are also characterized by the highest levels of precipitation and rainy days, particularly from November to January. Spring and autumn are transitional seasons with moderate temperatures and changeable weather.

One of the notable features of the weather in Chilliwack is the pronounced rainy season, which occurs in late autumn and winter, peaking in rainy days during November, December, and January. Meanwhile, the summer months of July and August stand out as the driest and sunniest periods of the year, making them ideal for outdoor activities.

The climate in Chilliwack is characterized by pronounced seasonal temperature changes. The annual temperature range is quite broad, from cool winters to warm summers. The coldest months are typically January and February. In February, the average temperature is -0.5°C, with the average minimum dropping to -3.6°C and the average maximum barely reaching +2.5°C. January and December are also cold, with average temperatures around 0°C and overnight frosts.

The summer period in Chilliwack, especially July and August, brings pleasant warmth. August is the hottest month with an average temperature of +18.0°C. During the day, the air warms up to an average of +23.5°C, and at night it cools down to +12.4°C. July is also very warm, with an average temperature of +17.4°C and daytime highs around +22.9°C. Summer days are usually warm, and nights are refreshingly cool, with a noticeable daily temperature range of about 10-11 degrees.

Winter months are characterized by cool weather. Average daytime temperatures from December to February range from +2.3°C to +2.8°C, while night temperatures regularly drop below zero, especially in January (-1.8°C) and February (-3.6°C). Transitional seasons, spring and autumn, show a gradual change in temperatures. March and April bring warming, with average temperatures of +2.9°C and +6.1°C respectively. In autumn, through September and October, the temperature gradually decreases, preparing the city for winter, with average values of +14.5°C and +8.7°C. Daily temperature fluctuations are also noticeable during these periods, although less pronounced than in summer.

In Chilliwack, there is a distinct shift between wet and dry periods throughout the year. The highest precipitation occurs during the cold season, peaking from November to January, while the summer months, especially July and August, are characterized as the driest.

Winter months such as January (11 mm of precipitation, 22 wet days), February (8 mm, 20 wet days), and December (10 mm, 20 wet days), as well as late autumn, especially November (the wettest month with 12 mm of precipitation and 20 wet days), bring most of the annual rainfall. Given the low average temperatures in January (0.5°C, min. -1.8°C), February (-0.5°C, min. -3.6°C), and December (0.1°C, min. -2.2°C), a significant portion of this precipitation likely falls as snow or sleet. Precipitation during these periods is quite frequent, as evidenced by the high number of days with precipitation, such as up to 22 days in January.

In contrast, summer in Chilliwack is quite dry. July and August are the driest months, with only 2 mm of precipitation and 7-8 wet days each. During this time, precipitation, if it occurs, is mainly in the form of light rain. The spring months (March-May) and early autumn (September-October) are transitional. In spring, the amount of precipitation gradually decreases, reaching 4 mm in May (15 wet days), and starts to rise again in autumn, for example, with 8 mm of precipitation over 17 days in October.

When planning a trip to Chilliwack, it is important to consider its humid climate and distinct seasonal changes. Waterproof clothing and comfortable shoes will come in handy year-round, as the number of rainy days is significant, especially from October to April. Don't forget an umbrella or a good raincoat. Layering your clothes will be your best friend, allowing you to easily adapt to temperature changes throughout the day, which can be quite variable.

For the winter months (November to March), when average temperatures hover around zero and often drop lower, pack warm, windproof, and waterproof outerwear, sweaters, fleece jackets, a hat, gloves, and a scarf. In spring (April-May) and autumn (September-October), the weather is milder but still cool and rainy, so layered clothing, including a light jacket or windbreaker, will be very useful. Summer (June-August) in Chilliwack is warm, with average temperatures around 14-18°C and highs reaching 23°C. During this period, you will need light clothes, T-shirts, and shorts, but it is also worth bringing a light jumper or jacket for evening walks or in case of occasional rain. Sunscreen and a hat will also be helpful on sunny summer days.

Regardless of the season, comfortable walking shoes are a must if you plan to explore the city and its surroundings. Given the frequent precipitation, especially outside the summer months, preference should be given to waterproof models. Overall, prepare for changeable weather and be ready for rain, especially if your trip falls between autumn and spring.