May weather forecastWashington, MO
May
Weather in May
The last month of the spring, May, is a warm month in Washington, Missouri, with an average temperature ranging between max 75.7°F (24.3°C) and min 56.3°F (13.5°C).Temperature
As May sets, the average high-temperature shows an increase, moving up from an enjoyable 66.2°F (19°C) in April to a warm 75.7°F (24.3°C). May nights observe an average temperature dip to a refreshing 56.3°F (13.5°C).Humidity
May is the most humid month, with an average relative humidity of 78%.Rainfall
The wettest months are April and May, with an average 3.23" (82mm) of rainfall.Snowfall
April through August and October are months without snowfall.Daylight
In Washington, the average length of the day in May is 14h and 17min.On the first day of May, sunrise is at 6:05 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 8:22 pm CDT.
Sunshine
In May, the average sunshine is 9.2h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average maximum UV index of 5 in May leads to these recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Washington, MO
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (38.1°F).
- Average low temperature in May: 56.3°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in May
Washington, MO
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Washington, MO
- Average wind speed in May: 6.7mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in May
Washington, MO
- Average humidity in May: 78%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Washington, MO
- Average rainfall in May: 3.23"
The wettest months (with the highest rainfall) are April and May (3.23").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in May
Washington, MO
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in May
Washington, MO
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in May
Washington, MO
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Washington, MO
- Average daylight in May: 14h and 18min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 12min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in May
Washington, MO
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in May
Washington, MO
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Washington, MO
- Average cloud cover in May: 39
The months with the most cloud cover are January and February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 30).
Average visibility in May
Washington, MO
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, September, October, November and December (6mi).
The months with the lowest visibility are May and August (5mi).
