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
The shift into May is marked by a modest rise in the average high-temperature, moving from April's moderate 57.6°F (14.2°C) to a comfortable 65.3°F (18.5°C). A sharp contrast between day and night is prevalent in May with an average nighttime temperature of 41.5°F (5.3°C).Humidity
The average relative humidity in May in Waterloo is 78%.Rainfall
In May, the rain falls for 13.3 days. Throughout May, 1.85" (47mm) of precipitation is accumulated. In Waterloo, during the entire year, the rain falls for 163.3 days and collects up to 29.92" (760mm) of precipitation.Snowfall
In Waterloo, snow does not fall in April through October.Daylight
In Waterloo, the average length of the day in May is 14h and 50min.On the first day of the month, sunrise is at 6:00 am and sunset at 8:16 pm. On the last day of May, sunrise is at 5:29 am and sunset at 8:48 pm PDT.
Sunshine
In Waterloo, the average sunshine in May is 8.5h.UV index
The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In May, the maximum UV index of 4 suggests these recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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 many days does it rain in May?
When it does not snow?
How many hours of daylight does Waterloo have in May?
When are sunrise and sunset in May?
How long on average sun shines in May in Waterloo?
What is the UV index reading in May?
Average temperature in May
Waterloo, OR
- Average high temperature in May: 65.3°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (45.3°F).
- Average low temperature in May: 41.5°F
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in May
Waterloo, OR
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in May
Waterloo, OR
- Average wind speed in May: 4.3mph
The windiest months (with the highest average wind speed) are January and March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in May
Waterloo, OR
- Average humidity in May: 78%
The months with the highest relative humidity are January, February, March and December (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall in May
Waterloo, OR
- Average rainfall in May: 1.85"
The wettest month (with the highest rainfall) is December (4.41").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in May
Waterloo, OR
- Average rainfall days in May: 13.3 days
The month with the highest number of rainy days is March (20.1 days).
The months with the least rainy days are July and August (3.8 days).
Average snowfall in May
Waterloo, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.13").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Waterloo, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Waterloo, OR
- 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 3min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in May
Waterloo, OR
- Average sunshine days in May: 15.5 days
The month with the most sunshine days is July (25.6 days).
The month with the least sunshine days is March (9.1 days).
Average UV index in May
Waterloo, 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
Waterloo, OR
- Average cloud cover in May: 48
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in May
Waterloo, OR
- Average visibility in May: 5mi
The months with the highest visibility are July, August and September (6mi).
The month with the lowest visibility is February (4mi).
Waterloo, Oregon, USA
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