May weather forecast
Wyoming, USA

May signals the true onset of spring in Wyoming, bringing more hospitable conditions that lay the groundwork for the summer ahead. Average low temperatures climb further, ranging between 30°F (-1.1°C) and 40°F (4.4°C) depending on location and altitude. Snowfall becomes increasingly rare, particularly in the plains where it usually gives way to rain. The highlands may still experience some lingering snow, but accumulations are generally below 20" (508mm).

Relative to April, May presents a consistent warming pattern and extended daylight hours, both of which encourage outdoor activities. Winds, which have been a constant feature in Wyoming, mellow down in intensity but are still present. While the occurrence of Chinook winds becomes rarer, their absence is less felt due to the general increase in temperatures. The month also marks the onset of the usual precipitation period that extends into early summer, although Wyoming remains relatively dry with average rainfall rarely exceeding 10" (254mm). May serves as a prelude to the state's tourist season, as hiking trails start to open and the landscapes become more accessible. The month offers a welcoming break from the long, harsh winter and a gentle introduction to the warmer months.

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• Cheyenne - May »
  The month with the most rainfall in Cheyenne is May, when the rain falls for 17.5 days and typically aggregates up to 2.95" (75mm) of precipitation. In Cheyenne, Wyoming, during May, the rain falls for 17.5 days and regularly aggregates up to 2.95" (75mm) of precipitation.
• Casper - May »
  In Casper, Wyoming, in May, it is raining for 14.1 days, with typically 1.77" (45mm) of accumulated precipitation. In Casper, during the entire year, snow falls for 61.5 days and aggregates up to 32.13" (816mm) of snow.
• Laramie - May »
  The month with the most rainfall in Laramie is May, when the rain falls for 15.1 days and typically aggregates up to 2.68" (68mm) of precipitation. On the last day of the month, in Laramie sunrise is at 5:31 am and sunset at 8:28 pm MDT.
• Gillette - May »
  During 2.3 snowfall days, in May, Gillette aggregates 2.6" (66mm) of snow. During 2.3 snowfall days, in May, Gillette aggregates 2.6" (66mm) of snow.
• Rock Springs - May »
  In Rock Springs during May, the rain falls for 13.8 days and regularly aggregates up to 1.5" (38mm) of precipitation. In Rock Springs in May, during 1.8 snowfall days, 0.87" (22mm) of snow is typically accumulated.
• Sheridan - May »
  The month with the most rainfall in Sheridan is May, when the rain falls for 22.3 days and typically aggregates up to 3.43" (87mm) of precipitation. In Sheridan, Wyoming, during the entire year, snow falls for 78.9 days and aggregates up to 46.3" (1176mm) of snow.
• Green River - May »
  In Green River, during May, the rain falls for 13.8 days and regularly aggregates up to 1.5" (38mm) of precipitation. In Green River, during the entire year, snow falls for 75.5 days and aggregates up to 30.16" (766mm) of snow.
• Evanston - May »
  In Evanston during the entire year, snow falls for 99.3 days and aggregates up to 56.22" (1428mm) of snow. In Evanston, in May, during 5.8 snowfall days, 3.11" (79mm) of snow is typically accumulated.
• Riverton - May »
  On the last day of the month, in Riverton, sunrise is at 5:37 am and sunset at 8:45 pm MDT. During 2.3 snowfall days, in May, Riverton aggregates 3.39" (86mm) of snow.
• Jackson - May »
  Throughout the year, in Jackson, there are 173.6 snowfall days, and 181.26" (4604mm) of snow is accumulated. In Jackson, in May, during 15.7 snowfall days, 11.42" (290mm) of snow is typically accumulated.
• Cody - May »
  The month with the most rainfall in Cody, Wyoming, is May, when the rain falls for 15.3 days and typically aggregates up to 1.57" (40mm) of precipitation. In Cody during May, snow falls for 2.4 days and regularly aggregates up to 2.01" (51mm) of snow.
• Rawlins - May »
  In Rawlins during May, the rain falls for 11.7 days and regularly aggregates up to 1.34" (34mm) of precipitation. On the last day of the month, in Rawlins, sunrise is at 5:36 am and sunset at 8:37 pm MDT.