Weather in St. George

Stay up to date with the current weather conditions in St. George. Below you will find the latest data, forecasts, and useful weather charts to help you plan your visit.

St. George in the USA is characterized by a desert climate with low humidity levels. This means you will encounter significant temperature fluctuations not only between seasons but often within a single day. The city is known for its high number of sunny days per year.

St. George has four distinct seasons. Summer, especially from June to August, is very hot and dry, with average temperatures easily exceeding 30°C, and maximums reaching 35-36°C. Winters, from December to February, are cool, with average temperatures around 4-5°C, and night frosts are not uncommon. Spring and autumn are transitional seasons with more moderate and comfortable temperatures.

One of the main features of St. George's climate is the extremely low amount of rainfall throughout the year. Most months, especially from April to October, are practically rain-free. A slight increase in precipitation and rainy days is observed during the winter months and early spring, but even then, levels remain low. This makes St. George an attractive destination for those who prefer sunny and dry weather.

St. George experiences a distinct annual temperature progression typical of its climatic features. The hottest month is usually July, when the average temperature reaches 30.2°C, and daytime highs can rise to 36.4°C. June and August are also very warm months, with average temperatures of 26.8°C and 28.5°C respectively. Conversely, the coldest month is January, with an average temperature of 4.5°C and night-time lows dropping on average to -0.9°C. December and February are also cool, with average temperatures around 5.4-5.5°C, and minimum values close to freezing point.

Summer months in St. George are characterized by sweltering and dry weather. From June to August, daytime temperatures are consistently high, often exceeding 30°C and reaching peak values above 35°C. Nights bring some relief but remain warm. Winters, from December to February, are cool. Daytime temperatures usually hover around 9-11°C, but night frosts are not uncommon, with temperatures potentially dropping to 0°C and below. Throughout the year, St. George sees significant diurnal temperature variations. The difference between daytime highs and night-time lows is often 10-14°C, which is particularly noticeable during transitional seasons like April and October, as well as in the winter months.

Precipitation in St. George is extremely rare and scarce throughout the year, consistent with its desert climate. The city experiences a very long dry season covering most of the year, with only a short period where rainfall increases slightly while remaining at very low levels.

The highest amount of precipitation, if one can call it that given the general aridity, occurs in the winter months and early spring. March stands out as the "wettest" month, with an average of about 2 mm of rainfall, and the number of days with precipitation reaching eight. January, February, November, and December also bring small amounts of moisture, about 1 mm in each of these months, with the number of rainy days varying from 3 to 6. Given that minimum temperatures in winter can drop to negative values (e.g., -0.9°C in January), winter precipitation may fall not only as rain but possibly as wet snow or sleet, although heavy snowfalls are not typical for the region.

From April to October, a pronounced dry season sets in St. George, where recorded rainfall amounts to 0 mm. The absolute driest month is June, which on average sees zero days with precipitation. Notably, in July and August, despite zero measured rainfall, statistics indicate 3-4 "wet days". This may suggest extremely insignificant, perhaps trace precipitation that is not recorded by measuring instruments as a full millimetre. Late spring (April, May) and early autumn (September, October) are also characterized by a minimal number of rainy days (2-3 days) with zero total volume.

When planning a trip to St. George, it is important to consider its desert climate with hot, dry summers and cool winters. Regardless of the time of year, comfortable walking shoes will be your best friend, as the city invites exploration on foot. Due to the high number of sunny days and low humidity, be sure to bring sunscreen, sunglasses, and a hat. Also, don't forget lip balm and moisturiser, as the air here is quite dry. Dressing in layers is a principle that will be relevant almost always, especially during transitional seasons and winter, when daytime and night-time temperatures can differ significantly.

If your trip falls during the summer months (June to August), prepare for high temperatures. Pack light, breathable clothing made from natural fabrics such as cotton or linen: shorts, t-shirts, and sundresses. Evenings may be slightly cooler, but generally, summer clothing will be your staple. For a winter visit (December to February), you will need warm items. Bring sweaters, fleece jackets, warm trousers, as well as a jacket, hat, gloves, and a scarf, as night-time temperatures can drop to zero and below. Although precipitation is minimal, rare rains are possible in the winter months and early spring, so a light waterproof jacket might be useful, but an umbrella will likely not be needed.

In spring (March to May) and autumn (September to November), the weather in St. George is most variable but generally comfortable. The key to the right wardrobe during these seasons is layering. During the day, it might be warm enough for a t-shirt, but in the morning and evening, a light jacket or sweater will come in handy. March may still see cool days and slight precipitation, while May and September will delight you with warmth. October and November bring gradual cooling. Given the extremely low rainfall for most of the year, especially from April to October, the focus should be on sun protection and comfortable clothing for varying temperatures, rather than rain gear.