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
May brings a rise in the average high-temperature, transitioning from April's mild 58.6°F (14.8°C) to an agreeable 69.4°F (20.8°C). Williamsburg reports an average nighttime low-temperature of 52.3°F (11.3°C) in May.Humidity
The average relative humidity in May is 79%.Rainfall
The month with the most rainfall in Williamsburg is May, when the rain falls for 18.5 days and typically aggregates up to 4.33" (110mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Williamsburg. May is the last month it regularly snows in Williamsburg, Iowa. During 0.1 snowfall days, in May, Williamsburg aggregates 0.04" (1mm) of snow. In Williamsburg, during the entire year, snow falls for 35.1 days and aggregates up to 15.43" (392mm) of snow.Daylight
The average length of the day in May is 14h and 33min.On the first day of May in Williamsburg, sunrise is at 6:03 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:35 pm CDT.
Sunshine
The average sunshine in May in Williamsburg is 8.6h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 5 in May translates into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. Around midday, solar radiation is most harmful; hence, exposure should be limited. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Williamsburg in May?
What is the average humidity in May in Williamsburg?
What is the rainiest month in Williamsburg?
How many days does it rain in May in Williamsburg?
What is the last month it snows in Williamsburg?
How many hours of daylight does Williamsburg have in May?
What time are sunrise and sunset in May in Williamsburg?
How long on average sun shines in May in Williamsburg?
What is the UV index intensity in May in Williamsburg?
Average temperature in May
Williamsburg, IA
- Average high temperature in May: 69.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in May: 52.3°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in May
Williamsburg, IA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Williamsburg, IA
- Average wind speed in May: 9.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in May
Williamsburg, IA
- Average humidity in May: 79%
The months with the highest relative humidity are January and July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Williamsburg, IA
- Average rainfall in May: 4.33"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in May
Williamsburg, IA
- Average rainfall days in May: 18.5 days
The months with the highest number of rainy days are May and June (18.5 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in May
Williamsburg, IA
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Williamsburg, IA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Williamsburg, IA
- Average daylight in May: 14h and 4min
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: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Williamsburg, IA
- Average sunshine days in May: 9.7 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in May
Williamsburg, IA
- 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
Williamsburg, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in May
Williamsburg, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Williamsburg, Iowa, USA
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