Weather in Twin Falls

Stay informed about the latest weather conditions in Twin Falls before stepping out. Below, you will find up-to-date weather reports, detailed forecasts, and useful charts to help plan your schedule.

The climate in Twin Falls can be characterised as semi-arid with four distinct seasons. The weather here is quite contrasting: travellers can expect cold winters and truly hot summers. Thanks to its location in a high desert area, the air is usually dry, which makes high summer temperatures more bearable, while nights remain cool and fresh even during the warmest months.

The summer season, especially July and August, is distinguished by heat and a lack of rainfall: the average temperature holds around 25–26°C, and daily highs often exceed 30°C. Rain at this time is a great rarity. Winter brings noticeable cooling with average temperatures around 0°C and night frosts. Although precipitation falls more frequently than in summer (up to 9–10 wet days per month), the total amount remains low.

Spring and autumn in Twin Falls are comfortable transitional periods. May and September are considered some of the best months to visit, when the daytime temperature fluctuates in a pleasant range from 15°C to 20°C. This is the ideal time for those who want to avoid the summer heat or winter cold while enjoying a moderate number of sunny days.

The climate in Twin Falls is characterised by distinct seasonality, offering travellers a wide range of weather conditions depending on the time of year. The hottest month is traditionally July, when the average daily temperature reaches 35.1°C, while December and January are considered the coldest period, with night readings dropping to -3.9°C. The annual temperature range here is significant, making each season unique for visiting in its own way.

Summer in the region is usually sweltering and dry, with minimal rainfall. In July and August, the air warms up to 33–35°C during the day; however, one should consider the daily temperature fluctuations characteristic of this area. Even on the hottest summer days, it becomes noticeably fresher after sunset: night temperatures drop to 17–18°C, bringing pleasant coolness after the daytime heat. September and May offer the mildest and most comfortable conditions with daily highs from 22°C to 27°C, ideally suited for long walks.

Winter in Twin Falls is cool and frosty, but not extremely severe. From December to February, the average temperature stays around 0°C — 1.5°C. During the day, the thermometer often rises above freezing, reaching 4–6°C, which allows one to enjoy winter landscapes without severe discomfort, although nights are consistently frosty. Travellers planning a visit during the winter months should definitely bring warm clothes to be prepared for morning and evening frosts.

The climate in the city of Twin Falls is characterised by a clear division into wetter and drier periods, although the total volume of precipitation here is small. In winter, from December to February, average temperatures often drop below freezing, so precipitation frequently falls as snow. January and December are some of the gloomiest months: on average, about 9–10 days with precipitation are recorded here, creating a winter atmosphere suitable for those who enjoy the cold.

Spring is also distinguished by a high frequency of precipitation, especially May, when the number of rainy days reaches ten again. However, with the arrival of summer, the situation changes radically, and a pronounced dry season begins. July and August are the driest months of the year; in July, rain is a rarity, occurring on average only once during the entire month.

In autumn, the weather gradually readjusts: if September still pleases with dryness (only about 3 days with precipitation), then by November the number of wet days increases to seven, preparing the city for winter. Travellers planning a visit to this part of the USA should remember that you will hardly need an umbrella in summer, but in winter and spring, the probability of precipitation is significantly higher.

When packing for Twin Falls, it is important to consider the distinct seasonality of the local climate. Winters here are cool, with temperatures often dropping below freezing, so a warm jacket, hat, gloves, and waterproof shoes will be mandatory wardrobe elements. Spring and autumn are characterised by changeable weather: cool mornings are replaced by warm days, so the best strategy is the principle of layering. Bring t-shirts, fleece sweaters, and a light windbreaker to easily adapt to temperature changes throughout the day.

Summer in the city is generally hot and dry, especially in July and August, when daytime temperatures can reach +35°C. During this period, you will need light clothes made of natural fabrics, shorts, and headwear for sun protection. Very little precipitation falls in summer, but sunscreen and sunglasses will be absolutely necessary due to high solar activity. In the off-season and winter, on the contrary, it is worth packing a compact umbrella or raincoat, as the number of rainy days increases.

Since Twin Falls is famous for its natural attractions, including waterfalls and canyons, be sure to put comfortable shoes in your luggage for long walks on rough terrain. Also, do not forget that open spaces in Idaho are often windy, so a light scarf or buff will be useful even in relatively warm weather. If you plan a trip during the winter months, thermal underwear will ensure additional comfort during walks in the fresh air.