Bellevue

Planning your day in Bellevue? Check out the latest weather data, forecasts, and helpful charts right here to make your stay as comfortable as possible.

The climate in Bellevue can be described as temperate marine, featuring mild, wet winters and warm, relatively dry summers. The city does not experience extreme temperature swings throughout the year, making the weather generally comfortable for visiting in different seasons, though precipitation patterns change significantly.

Bellevue has four distinct seasons. Summer, especially July and August, brings the warmest days with average highs around 25°C and the least rainfall—only about 1 mm and 5-6 rainy days per month. In contrast, winter (December to February) is cooler, with average temperatures around 5°C, and much wetter: rainfall reaches 6-7 mm, and the number of rainy days can hit 20 per month. Spring and autumn are transitional seasons with moderate temperatures and variable weather.

One notable feature of Bellevue's climate is the pronounced wet season in late autumn and winter (November to February), when rainfall is highest and overcast, rainy days are most frequent. Conversely, the summer months enjoy plenty of sunshine and minimal rain, making them the perfect time for outdoor activities.

The climate in Bellevue is characterized by moderate temperatures throughout the year, with clearly defined seasons. The warmest months are July and August, when average temperatures reach 19.5°C and 19.9°C, respectively. During these summer months, daytime highs can climb to a pleasant 24.7°C - 25.1°C, while nighttime lows rarely drop below 14.2°C - 14.7°C. This creates comfortable conditions for sightseeing and outdoor activities.

Winter in Bellevue is quite mild but cool. The coldest months are February, with an average temperature of 4.7°C, followed by January (5.7°C) and December (5.2°C). During these months, average minimum temperatures hover around 2.0°C - 3.4°C, while daytime highs usually do not exceed 7.4°C - 8.1°C. Frost is possible, but severe cold is not typical for this region. Transitional seasons—spring and autumn—see gradual temperature changes. In spring, from March to May, temperatures rise steadily from an average of 7.1°C to 13.6°C. In autumn, from September to November, the process is reversed, with temperatures dropping from 16.9°C to 7.4°C.

Throughout the year, Bellevue experiences noticeable diurnal temperature fluctuations. The difference between daytime highs and nighttime lows can range from 4-5°C in the winter months (e.g., in January, the difference between 8.1°C and 3.4°C) to 10°C or more in the summer (e.g., in July, the difference between 24.7°C and 14.2°C). This means that even on warm summer days, evenings can be quite cool, so it's worth carrying a light jacket or sweater.

Bellevue experiences a clear seasonality in its precipitation patterns. The city is characterized by a wet period spanning late autumn and winter, and a significantly drier summer season. This means that the amount and frequency of rain vary substantially throughout the year.

The highest rainfall occurs from November to February. The wettest months are January and December, each averaging 7 mm of precipitation, followed by November and February with 6 mm. Rain is frequent during these months; for example, January sees about 20 rainy days, while November and December have 19 each. Given the moderate total rainfall despite the high frequency, this period is often characterized by persistent but light rain or drizzle.

In contrast, the summer months are the driest in Bellevue. July and August see only 1 mm of precipitation each, with the number of rainy days at a minimum—about 5-6 per month. Spring and early autumn are transitional seasons with moderate rainfall: for instance, March, May, and June see 3 mm each, while April sees 4 mm, with rainy days ranging from 10 (in September) to 18 (in April). October also brings more moisture (5 mm, 16 rainy days), signaling the arrival of the wet season.

When planning a trip to Bellevue, it's important to account for the changeable weather typical of this region of the USA. The key to packing is layering, which allows you to stay comfortable as temperatures fluctuate throughout the day. Regardless of the season, be sure to bring comfortable waterproof shoes for walking, as rainy days are frequent year-round. A compact umbrella or a light raincoat will also be indispensable companions.

During the cooler months, from approximately October to April—when average temperatures range from 5°C to 11°C and rainy days can reach 20 per month—you'll need warm clothing. Pack sweaters, fleeces, a warm waterproof and windproof jacket, as well as a hat, gloves, and a scarf, especially for the period from November to February. Waterproof boots will be very helpful for keeping your feet dry during frequent rain showers.

In the summer, from June to August, the weather in Bellevue becomes significantly warmer, with average temperatures around 16-20°C and highs of up to 25°C. At this time, t-shirts, shorts, or light trousers are appropriate. However, even in summer, evenings can be cool, and the chance of rain remains, albeit reduced (5-12 rainy days), so a light jacket or sweater and that same raincoat will come in handy. On sunny days, don't forget sunscreen and a hat for sun protection.