Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
Watertown sees a rise in temperature during May, with average high-temperatures transitioning from a cool 51.6°F (10.9°C) in April to an enjoyable 64.6°F (18.1°C). Watertown's temperature lowers to a mean of 46.9°F (8.3°C) during the nights in May.Humidity
The average relative humidity in May in Watertown is 71%.Rainfall
In May, the rain falls for 16.3 days. Throughout May, 2.52" (64mm) of precipitation is accumulated. In Watertown, South Dakota, during the entire year, the rain falls for 112.3 days and collects up to 18.78" (477mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.8 snowfall days, in May, Watertown aggregates 0.12" (3mm) of snow. In Watertown, during the entire year, snow falls for 64.3 days and aggregates up to 17.56" (446mm) of snow.Daylight
In Watertown, the average length of the day in May is 14h and 52min.On the first day of May, sunrise is at 6:16 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 9:07 pm CDT.
Sunshine
In Watertown, the average sunshine in May is 8.7h.UV index
In Watertown, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In May, the maximum UV index of 5 suggests this advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Watertown?
What is the average humidity in May in Watertown?
How much does it rain in Watertown in May?
What is the last month it snows in Watertown?
How many hours of daylight does Watertown have in May?
What time are sunrise and sunset in May in Watertown?
How long on average sun shines in May in Watertown?
What is the UV index reading in May in Watertown?
Average temperature in May
Watertown, SD
- Average high temperature in May: 64.6°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 May: 46.9°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 May
Watertown, SD
- Average pressure in May: 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 May
Watertown, SD
- Average wind speed in May: 10.3mph
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 May
Watertown, SD
- Average humidity in May: 71%
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 May
Watertown, SD
- Average rainfall in May: 2.52"
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 May
Watertown, SD
- Average rainfall days in May: 16.3 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 May
Watertown, SD
- Average snowfall in May: 0.12"
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 May
Watertown, SD
- Average snowfall days in May: 0.8 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 May /
Average sunshine in May
Watertown, SD
- Average daylight in May: 14h and 5min
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 May: 8h and 4min
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 May
Watertown, SD
- Average sunshine days in May: 11.9 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 May
Watertown, SD
- Average UV index in May: 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 May
Watertown, SD
- Average cloud cover in May: 41
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 May
Watertown, SD
- Average visibility in May: 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).
Watertown, South Dakota, USA
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