Weather in Thief River Falls

Planning your visit or just curious about the climate? Below you will find the most up-to-date information on the weather in Thief River Falls, including detailed forecasts and visual charts.

The climate in Thief River Falls can be characterised as continental with distinct seasonal contrasts. This region is typified by a significant temperature difference between winter and summer, so the nature of your trip will depend heavily on the chosen time of year. Overall, the weather here is predictable in its seasonality, offering tourists both snowy frosty landscapes and sunny warm days.

Winter here is truly severe: from December to February, average temperatures hover between -8°C and -12°C, while at night the thermometer can drop below -17°C. Summer, conversely, brings long-awaited warmth. July is the hottest month, when the air warms up to an average of 22°C, and maximum temperatures reach a comfortable 27°C. This is the ideal time for walks and active outdoor recreation.

The transitional seasons, spring and autumn, pass quite dynamically. While in May and September the weather delights with pleasant temperatures above +13°C, November and March already remind one of the winter chill with freezing temperatures. It is also worth noting that the number of rainy days increases slightly during the warm period of the year: precipitation falls most frequently from May to August, so an umbrella or raincoat will become useful companions on a summer trip.

The climate in Thief River Falls is characterised by pronounced seasonality and significant contrasts, offering travellers the experience of both a genuine harsh winter and a comfortable, warm summer. The coldest period traditionally falls on January and February, when the average temperature stays around -12°C. Winters here are truly frosty: night-time readings often drop to -17°C and below, and negative temperatures dominate from November to March, creating a stable snow cover.

The summer season brings radical changes and is the most favourable time for a visit. The warmest month of the year is considered to be July with an average temperature of +21.8°C. At this time, as well as in June and August, daily highs often reach a pleasant +25°C...+27°C. This is not exhausting heat, but mild and comfortable warmth, ideally suited for active leisure in the fresh air and exploring local attractions.

A characteristic feature of the local climate is the noticeable temperature fluctuations throughout the day. Even at the height of summer, when the air warms up to +27°C during the day, nights bring refreshing coolness, and the thermometer may drop to +15°C...+16°C. Transitional seasons here are quite rapid: while it is still cool in April, by May warm weather sets in, and in autumn, a sharp cooling begins in October, quickly preparing the city for a new winter.

The nature of precipitation in Thief River Falls is closely linked to sharp seasonal temperature changes. The winter period here is considered the driest time of the year: in January and February, the minimum number of days with precipitation is recorded (only 5–6 days per month). Considering that the average temperature at this time stays around -12°C, moisture falls exclusively in the form of snow, forming a stable winter landscape.

With the arrival of spring and warming, the number of wet days noticeably increases. The peak of precipitation falls at the beginning of summer: June is the rainiest month, when the sky can frown for up to 12 days. In July and August, rains also occur quite frequently (about 10 days a month), but thanks to the warm weather, they are often perceived as refreshing, although an umbrella will certainly not go amiss during the trip.

In autumn, the frequency of precipitation gradually decreases. In September and October, there are about 9 rainy days, however, by November, when the temperature again drops below zero, rain gives way to snow. Thus, the wettest season lasts from late spring to mid-summer, while the most stable and dry weather (albeit frosty) settles in the middle of winter.

When packing for Thief River Falls, it is important to consider the distinct seasonality of the local climate. Winters here are frosty, so for a trip from November to March, warm clothing is vital: a thick down jacket or parka, thermal underwear, woollen sweaters, as well as a hat, scarf, and gloves. Since the temperature often drops significantly below zero (on average to -12°C, and sometimes lower), ensure you have comfortable insulated shoes with non-slip soles.

The summer months delight with warmth, when the thermometer rises to +25°C and above, allowing for light t-shirts, shorts, and cotton trousers. However, summer is also the period with the highest number of rainy days (up to 10–12 days per month), so a light raincoat or a compact umbrella must be in your luggage. In the off-season (spring and autumn), the weather is changeable, and the best solution will be the principle of layering: a combination of a t-shirt, fleece jacket, and windproof jacket will allow you to feel comfortable during any temperature changes.

Regardless of the time of year, take reliable and broken-in shoes for long walks with you, as this corner of the United States is conducive to hiking routes. Do not forget sunglasses and cream: they will be useful both under the bright summer sun and in winter for protection against the blinding glare on the snow.