August weather forecastWatertown, SD
August
Weather in August
August aligns closely with July in terms of temperature with the mercury hovering around a close-to-boiling 80.1°F (26.7°C). The overall scenery remains summery with daylight stretching up to 14 hours. A reduction in rainfall and the continuation of warm temperatures keep the summer vibes going strong. Despite the looming end of summer, August's weather conditions continue to favor outdoor activities. The city relishes the late summer's sunny days, making the most of the last full month of the season.Temperature
The commencement of August notes an average high-temperature of a still moderately hot 80.1°F (26.7°C), exhibiting little difference from the previous month. In the month of August, Watertown's average low-temperature falls to a moderate 59°F (15°C).Humidity
In Watertown, the average relative humidity in August is 69%.Rainfall
In August, in Watertown, the rain falls for 12.4 days. Throughout August, 1.81" (46mm) of precipitation is accumulated. Throughout the year, there are 112.3 rainfall days, and 18.78" (477mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In August, the average length of the day in Watertown is 14h and 1min.On the first day of the month, sunrise is at 6:15 am and sunset at 8:54 pm. On the last day of August, in Watertown, South Dakota, sunrise is at 6:50 am and sunset at 8:06 pm CDT.
Sunshine
In Watertown, the average sunshine in August is 10.3h.UV index
In Watertown, South Dakota, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In August, the maximum UV index of 5 translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Watertown, SD
- Average high temperature in August: 80.1°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (19.4°F).
- Average low temperature in August: 59°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (5.5°F).
Average pressure in August
Watertown, SD
- Average pressure in August: 29.92"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in August
Watertown, SD
- Average wind speed in August: 8.6mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity in August
Watertown, SD
- Average humidity in August: 69%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are September and October (68%).
Average rainfall in August
Watertown, SD
- Average rainfall in August: 1.81"
The wettest month (with the highest rainfall) is June (3.19").
The driest months (with the least rainfall) are January and February (0.59").
Average rainfall days in August
Watertown, SD
- Average rainfall days in August: 12.4 days
The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in August
Watertown, SD
- Average snowfall in August: 0"
The months with the highest snowfall are January and December (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Watertown, SD
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Watertown, SD
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in August: 10h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Watertown, SD
- Average sunshine days in August: 15.7 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in August
Watertown, SD
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Watertown, SD
- Average cloud cover in August: 27
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in August
Watertown, SD
- Average visibility in August: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
