May weather forecastRock River, WY
May
Weather in May
The last month of the spring, May, is a refreshing month in Rock River, Wyoming, with an average temperature fluctuating between 56.5°F (13.6°C) and 37°F (2.8°C).Temperature
With the onset of May, Rock River's average high-temperature experiences a rise, moving from April's frosty 46°F (7.8°C) to a refreshing 56.5°F (13.6°C). During May, the nighttime temperature averages of 37°F (2.8°C).Humidity
The average relative humidity in May is 58%.Rainfall
The month with the most rainfall in Rock River is May, when the rain falls for 15.1 days and typically aggregates up to 2.68" (68mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Rock River, in May, snow falls for 7.4 days, with typically accumulated 6.69" (170mm) of snow. Throughout the year, there are 78.1 snowfall days, and 44.8" (1138mm) of snow is accumulated.Daylight
In May, the average length of the day in Rock River is 14h and 34min.On the first day of the month, sunrise is at 5:59 am and sunset at 8:02 pm. On the last day of May, sunrise is at 5:31 am and sunset at 8:31 pm MDT.
Sunshine
In Rock River, the average sunshine in May is 10.3h.UV index
In May, the average daily maximum UV index in Rock River is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In May, an average UV index of 4 transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Boost your sun resistance with garments that are densely woven yet spacious. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Rock River, WY
- Average high temperature in May: 56.5°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is December (28.2°F).
- Average low temperature in May: 37°F
The month with the highest average low temperature is July (54.1°F).
The coldest month (with the lowest average low temperature) is December (14.4°F).
Average pressure in May
Rock River, WY
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in May
Rock River, WY
- Average wind speed in May: 11.2mph
The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest month (with the lowest average wind speed) is July (9.3mph).
Average humidity in May
Rock River, WY
- Average humidity in May: 58%
The months with the highest relative humidity are January and February (75%).
The months with the lowest relative humidity are August and September (43%).
Average rainfall in May
Rock River, WY
- Average rainfall in May: 2.68"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in May
Rock River, WY
- Average rainfall days in May: 15.1 days
The months with the highest number of rainy days are May and July (15.1 days).
The months with the least rainy days are January, February and November (2.9 days).
Average snowfall in May
Rock River, WY
- Average snowfall in May: 6.69"
The month with the highest snowfall is April (9.76").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Rock River, WY
- Average snowfall days in May: 7.4 days
The month with the highest number of snowfall days is April (12.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Rock River, WY
- Average daylight in May: 14h and 36min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 10h and 18min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in May
Rock River, WY
- Average sunshine days in May: 8.9 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is May (8.9 days).
Average UV index in May
Rock River, WY
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in May
Rock River, WY
- Average cloud cover in May: 31
The month with the most cloud cover is February (Cloud cover 34).
The month with the least cloud cover is September (Cloud cover 17).
Average visibility in May
Rock River, WY
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
