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
A gentle upsurge in temperatures occurs as April gives way to May, with average highs shifting from a moderate 56.1°F (13.4°C) to a comfortable 64.6°F (18.1°C). Williams experiences a drastic reduction from day temperatures to an average low of 39.4°F (4.1°C) in May.Humidity
In May, the average relative humidity is 73%.Rainfall
In Williams, during May, the rain falls for 10.9 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Williams, during the entire year, the rain falls for 92.5 days and collects up to 12.09" (307mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Williams. During 0.3 snowfall days, in May, Williams aggregates 0.08" (2mm) of snow. Throughout the year, there are 31 snowfall days, and 23.39" (594mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 37min.On the first day of May, sunrise is at 6:07 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:42 pm PDT.
Sunshine
In May, the average sunshine is 10h.UV index
The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In May, the average maximum UV index of 4 translates into the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Williams have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index intensity in May?
Average temperature in May
Williams, OR
- Average high temperature in May: 64.6°F
The warmest month (with the highest average high temperature) is August (84.4°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in May: 39.4°F
The months with the highest average low temperature are July and August (49.5°F).
The coldest month (with the lowest average low temperature) is December (28.9°F).
Average pressure in May
Williams, OR
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in May
Williams, OR
- Average wind speed in May: 3.8mph
The windiest month (with the highest average wind speed) is March (4.3mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in May
Williams, OR
- Average humidity in May: 73%
The months with the highest relative humidity are January and December (84%).
The month with the lowest relative humidity is August (60%).
Average rainfall in May
Williams, OR
- Average rainfall in May: 1.14"
The wettest month (with the highest rainfall) is January (2.01").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in May
Williams, OR
- Average rainfall days in May: 10.9 days
The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (3.5 days).
Average snowfall in May
Williams, OR
- Average snowfall in May: 0.08"
The month with the highest snowfall is December (6.3").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Williams, OR
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is February (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Williams, OR
- 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: 10h and 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 0min).
Average sunshine days in May
Williams, OR
- Average sunshine days in May: 18.8 days
The months with the most sunshine days are July and August (25.3 days).
The month with the least sunshine days is March (15 days).
Average UV index in May
Williams, OR
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Williams, OR
- Average cloud cover in May: 41
The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in May
Williams, OR
- Average visibility in May: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Williams, Oregon, USA
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