Salt Lake City Weather in May

Salt Lake City, Utah enjoys plenty of warm weather weather during May. This is one of the rainier months of the year here. But with the dry climate, the amount of rainfall is never extreme.

This page gives detailed information on the typical May temperature, precipitation, sun, humidity, wind and storms for Salt Lake City. The numbers here are historical averages based on climate data gathered at the Salt Lake City International Airport, located a few miles northwest of the city's center.

Temperature Weather iconTemperature

73 °F May average high 23 °C
50 °F May average low 10 °C
18 days 70 °F max. or more (21 °C)
19 days 50 °F min. or less (10 °C)

The temperature rises nearly every day in May to over 60 degrees Fahrenheit (21 degrees Celsius) at Salt Lake City. The city averages 9 days this month when the thermometer reaches into the 80s °F (over 27 °C). Some years even have a day or two of 90-degree (over 32 °C) weather in May.

The thermometer dips to 40 °F (4 °C) or below on and average of 5 nights this month. May rarely gets cold enough for frost.

Rainy Weather iconPrecipitation

1.8 in total precipitation 46 mm
9 days of rain

Half the time, Salt Lake City receives 1.0 to 2.7 inches (25 to 69 mm) of rainfall in May. One in four years has drier weather, while another one in four is wetter. A couple times a decade a light snowfall lands in May.

Sunny Weather iconSun

72 % sunshine
9 days clear skies

The sun's rays reach the ground in Salt Lake City during 72 percent of daylight hours on average in May, for a total of 323 hours in the month. Typically on 9 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in May at Salt Lake City lasts for 14 hours and 28 minutes a day on average. The shortest day of the month is the 1st with 13 hours and 58 minutes of daylight. By the end of the month, the days have lengthened to 14:53 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

49 % May average humidity

The relative humidity in Salt Lake City during May usually peaks at 65 percent in the morning then drops to 33 percent by late afternoon.

Local Time2 am5 am8 am11 am2 pm5 pm8 pm11 pm
Humidity % 63 65 51 38 34 33 48 57

Windy Weather iconWind

9.4 mph May wind speed average 15.1 kph

May is a little windier than most other months in Salt Lake City.

Stormy Weather iconStorms

1 day rainfall of 0.5 inches (13 mm) or more
6 days with thunderstorms in May

The frequency of thunderstorms picks up in May.

About once a decade Salt Lake City has a storm in March that leaves one to three inches (2.5 to 8 cm) of snow.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

Salt Lake City Weather
Back to Top