May weather forecastMonmouth, OR
May
Weather in May
May, the last month of the spring in Monmouth, is a refreshing month, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 42.4°F (5.8°C).Temperature
A soft shift in the average high-temperature is noticeable in May, transitioning from a refreshing 57.7°F (14.3°C) in April to a comfortable 65.8°F (18.8°C). Monmouth's nights in May are distinguished by a pronounced temperature shift from the day, with an average low of 42.4°F (5.8°C).Humidity
In May, the average relative humidity is 77%.Rainfall
In Monmouth, in May, during 11 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, there are 144.6 rainfall days, and 10.04" (255mm) of precipitation is accumulated.Snowfall
In Monmouth, snow does not fall in April through November.Daylight
The average length of the day in May is 14h and 52min.On the first day of May, sunrise is at 6:01 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:29 am and sunset at 8:51 pm PDT.
Sunshine
In May, the average sunshine is 8.5h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 4 during May, leads to the following recommendations:
Be vigilant - Preventing sunburn is recommended. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Monmouth, OR
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in May: 42.4°F
The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in May
Monmouth, OR
- Average pressure in May: 30.04"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in May
Monmouth, OR
- Average wind speed in May: 4.3mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in May
Monmouth, OR
- Average humidity in May: 77%
The months with the highest relative humidity are February and December (88%).
The month with the lowest relative humidity is August (68%).
Average rainfall in May
Monmouth, OR
- Average rainfall in May: 0.63"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in May
Monmouth, OR
- Average rainfall days in May: 11 days
The month with the highest number of rainy days is March (17.8 days).
The month with the least rainy days is August (4 days).
Average snowfall in May
Monmouth, OR
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Monmouth, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.8 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
Monmouth, OR
- Average daylight in May: 14h and 54min
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 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in May
Monmouth, OR
- Average sunshine days in May: 16.8 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (9.7 days).
Average UV index in May
Monmouth, OR
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Monmouth, OR
- Average cloud cover in May: 49
The months with the most cloud cover are February and March (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in May
Monmouth, OR
- Average visibility in May: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
