Climate and monthly weather forecastSaint George, UT

The climate of Saint George

Geographically positioned in the southwestern part of Utah, USA, Saint George sits comfortably within the mid-latitude steppe which forms a part of the Köppen climate classification BSk. A year-round observation of the climatological parameters shows a varied combination of temperatures, humidity, rainfall, snowfall, daylight, sun, UV Index, visibility, cloud percentage, pressure, and wind speed.

The range of temperatures throughout the year spans broadly from a low of 31.6°F (-0.2°C) in December to an intense high of 93.9°F (34.4°C) in July. Typically, the humidity levels vary between an annual low of 18% in June and a peak of 59% seen in January. Rainfall is relatively distributed unevenly over the year, with an observed high of 0.98" (25mm) in March. However, a minimal number of rainy days are recorded with the maximum being 8.3 days in March. Snowfall is almost non-existent with token measures of 0.16" (4mm) and 0.08" (2mm) in December and November respectively.

Daylight hours naturally amplify from a low of 9.7 hours in December to a radiant high of 14.7 hours in June. On the other hand, the measurement of sunshine differs only marginally from 7 hours in January to 11.9 hours in both June and July. The UV Index oscillates between a winter low of 2 in December to a peak of 7 in the summer months from June to August. Visibility remains consistently at 6 miles throughout the year. Cloud content shows minimal fluctuation as well, with just a difference of 9% between the lowest in June and the highest in December. Pressure levels show marginal variance hovering around the high 29s inches. Wind speed remains fairly constant between 5.3mph (8.5km/h) and 7.3mph (11.7km/h), with gusts reaching up to 11mph (17.7km/h) in April.

The best time to visit Saint George

A thoughtful analysis of the climatological data recommends the period from April to June as the most pleasant time to visit Saint George. During these months, temperatures are moderate, hovering between a comfortable 68.4°F (20.2°C) to 90.1°F (32.3°C). Daylight is ample, extending up to 14.7 hours in June. There is a high chance of experiencing clear skies as humidity is low ranging between 31% to 18%, and cloud content is at a mere 6% in June. The UV Index, although at a slightly high level of 6 or 7, is unlikely to be a deterrent for outdoor activities considering the low humidity and cloud percentage.

The worst time to visit Saint George

Travel plans to Saint George in the months of November and December might prove to be less favourable due to the low temperatures, that can drop to 40.3°F (4.6°C) and 31.6°F (-0.2°C) respectively. Daylight hours also fade down to just above 10 hours, restricting the available time for sightseeing or outdoor activities.

Spring weather in Saint George

Spring in Saint George runs from March to May with temperatures ranging from 60.6°F (15.9°C) to 77.4°F (25.2°C), creating a comfortable environment. There is a notable increase in daylight hours from 12 hours in March to 14.2 hours in May. Rainfall remains relatively low and humidity drops from 41% to 26% over the course of these spring months.

Summer weather in Saint George

June through August marks the summer period in Saint George. These months experience temperatures that see an elevate from 90.1°F (32.3°C) to 93.9°F (34.4°C) in July before a slight dip to 92.3°F (33.5°C) in August. Daylight is ample with 14.7 hours in June descending to 13.5 hours in August. However, this is the driest period of the year, with humidity dropping to an annual low of 18% and minimal rainfall.

Autumn weather in Saint George

When autumn comes in September through November, temperatures see a downward trend, decreasing from 85.1°F (29.5°C) to 59.2°F (15.1°C). The daylight hours dwindle too, from 12.4 hours in September down to 10.2 hours in November. Despite the decline in temperatures, the weather remains largely dry with relatively low rainfall and humidity levels.

Winter weather in Saint George

Winter in Saint George which spans from December to February, experiences the coldest temperatures of the year, falling from 47.7°F (8.7°C) in December to a chilly 32.5°F (0.3°C) in February. Daylight hours are at their lowest, between 9.7 hours to 10.9 hours. Although winter is relatively dry, Saint George receives minimal snowfall during this season, with just 0.16" (4mm) of snow recorded in December and February respectively.

Weather in January

Transitioning from the chill of December, January in Saint George, Utah presents a cold onset to the year. The average high and low temperatures are 49.1°F (9.5°C) and 32.5°F (0.3°C) respectively, marking it as one of the cooler months in the area. Weather in January »

Weather in February

Shifting from the cold January, February persists with cool temperatures, though slightly warmer. The weather maintains relative humidity of 53% with a slightly lower atmospheric pressure at 30.07 in. Snowfall continues albeit at a lesser volume than the preceding month. Weather in February »

Weather in March

As winter fades into spring, March delivers a surge in temperature while maintaining a relatively low level of humidity at 41%. The most significant change is the absence of snowfall, marking the conclusion of winter in Saint George. Weather in March »

Weather in April

April confirms the full swing of spring in Saint George with temperatures soaring up to 68.4°F (20.2°C) from a minimum of 46.9°F (8.3°C). The weather conditions remain moderately humid at 31%, promoting a suitable environment for spring blossoms. Weather in April »

Weather in May

May is the stepping stone to summer in Saint George as temperatures continue to loft. The city experiences a dip in humidity levels to 26% and a record-low monthly rainfall of just 0.28" (7mm). The city's inhabitants start to feel the heat as daylight hours reach their first high of the year, clocking at 14.2 hours. In Saint George, the average high-temperature in May rises, from an agreeable 68.4°F (20.2°C) in April, to a warm 77.4°F (25.2°C). Weather in May »

Weather in June

June is the doorway to summer with temperatures reaching a record-high average of 90.1°F (32.3°C). The noticeable increase in temperature offers a clear contrast from the cooler months of the year. Despite being the driest month with only 18% humidity, June ensures a happy suntan with a high UV index of 7. Weather in June »

Weather in July

July sees the peak of summer in Saint George with temperatures peaking at a scorching 93.9°F (34.4°C). The climatic conditions are accentuated by an increasing trend in rainfall, signaling the start of the monsoons. This is also the month when the city basks in maximum sunlight, with daylight hours reaching the highest at around 14.4 hours. July is the month when Saint George experiences its warmest temperatures, averaging a high of 93.9°F (34.4°C) and a low of 72.3°F (22.4°C). Weather in July »

Weather in August

August carries forward the heat of July with high temperatures slightly dropping to 92.3°F (33.5°C). The city's weather is generally hot and humid, with a noticeable increase in rainfall. This period continues to be hot and humid as the aftermath of the moisture-laden monsoon winds becomes predominant. The advent of August denotes an average high-temperature of a still tropical 92.3°F (33.5°C), subtly different from July's 93.9°F (34.4°C). Weather in August »

Weather in September

September experiences a drop in temperature, marking the onset of fall in Saint George. The weather characteristics associated with high temperatures begin to tone down, giving way to mildly warm days and much cooler nights. It's also the phase which brings back the breeze, post the hot and high-temperature summer. A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a hot 92.3°F (33.5°C) to a warm 85.1°F (29.5°C). Weather in September »

Weather in October

October symbolizes the mid-fall season in Saint George, characterized by further decrease in temperatures. The change in season results in increased humidity and less daylight hours, marking the approach of winter. Enjoying the fall colors while preparing for the impending winter becomes a usual sight in the beautiful city. October in Saint George is marked by a distinct decrease in the average high-temperature, falling from a warm 85.1°F (29.5°C) in September to a pleasant 70.7°F (21.5°C). Weather in October »

Weather in November

November brings a marked change in weather in Saint George as the city moves into the winter. A huge drop in temperatures to as low as 40.3°F (4.6°C) is noted, alongside a rise in the humidity levels to 42%. The end of fall and the start of winter is palpable as the daylight hours reduce drastically to about 10.2 hours. November's onset brings a slight change in high-temperatures, falling from an agreeable 70.7°F (21.5°C) in October to a moderate 59.2°F (15.1°C). Weather in November »

Weather in December

Wrapping up the year, December marks the full swing of winter in Saint George. Notably, the harshness of winter is felt with a low temperature of 31.6°F (-0.2°C) and a heightened level of humidity at 57%. With winter reaching its peak, the year concludes on a cold note with chances of snowfall reinstating itself. Saint George's coldest temperatures are experienced in December, with average high temperatures of 47.7°F (8.7°C) and lows of 31.6°F (-0.2°C). Weather in December »