July weather forecastKeystone, SD
July
Weather in July
Warm and comfortable would accurately describe the weather in Keystone for the month of July. The city records its highest temperatures for the year during this month, with a top temperature reaching a scorching 81.7°F (27.6°C). Summer is in full swing with long daylight hours and dry climate being the most desirable characteristics of this month. The opportunity for open-air activities continues to attract locals and tourists alike. Moving into August, the high temperatures persist, although there is a slight dip as the peak of summer starts to pass.Temperature
Temperature readings in Keystone reach their annual highs in July, averaging 81.7°F (27.6°C) and a minimum average of 60.4°F (15.8°C).Heat index
The heat index for July is calculated to be 82.4°F (28°C). A sense of exhaustion might occur with extended exposure and activity, potentially causing heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Humidity
In Keystone, the average relative humidity in July is 54%.Rainfall
In Keystone, during July, the rain falls for 17.3 days and regularly aggregates up to 2.91" (74mm) of precipitation. Throughout the year, there are 135.4 rainfall days, and 20.39" (518mm) of precipitation is accumulated.Snowfall
In Keystone, snow does not fall in June through August.Daylight
In Keystone, the average length of the day in July is 15h and 5min.On the first day of July, sunrise is at 5:15 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 8:18 pm MDT.
Sunshine
In July, the average sunshine is 11.6h.UV index
The month with the highest UV index in Keystone is July, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 6 during July translates into the following recommendations:
Deflect overexposure. Sun protection is a necessity. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Keystone, SD
- Average high temperature in July: 81.7°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (29.8°F).
- Average low temperature in July: 60.4°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).
Average pressure in July
Keystone, SD
- Average pressure in July: 29.9"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in July
Keystone, SD
- Average wind speed in July: 7.5mph
The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in July
Keystone, SD
- Average humidity in July: 54%
The months with the highest relative humidity are January and February (77%).
The months with the lowest relative humidity are August and September (52%).
Average rainfall in July
Keystone, SD
- Average rainfall in July: 2.91"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in July
Keystone, SD
- Average rainfall days in July: 17.3 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is November (4.5 days).
Average snowfall in July
Keystone, SD
- Average snowfall in July: 0"
The month with the highest snowfall is April (7.24").
The months with the least snowfall are June, July and August (0").
Average snowfall days in July
Keystone, SD
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in July /
Average sunshine in July
Keystone, SD
- Average daylight in July: 15h and 6min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in July: 11h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in July
Keystone, SD
- Average sunshine days in July: 8.6 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (7.8 days).
Average UV index in July
Keystone, SD
- Average UV index in July: 6
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in July
Keystone, SD
- Average cloud cover in July: 19
The month with the most cloud cover is April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in July
Keystone, SD
- Average visibility in July: 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).
