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
Ilwaco's May reports an average high-temperature of a mild 55.9°F (13.3°C), exhibiting a minor difference from April. Ilwaco, in May, registers a nighttime average temperature of 48.7°F (9.3°C).Humidity
In May, the average relative humidity in Ilwaco is 81%.Rainfall
In May, in Ilwaco, the rain falls for 11.1 days. Throughout May, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 165.1 rainfall days, and 19.92" (506mm) of precipitation is accumulated.Snowfall
March through August, October through December are months without snowfall.Daylight
In May, the average length of the day is 15h and 1min.On the first day of May in Ilwaco, sunrise is at 6:00 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:27 am and sunset at 9:00 pm PDT.
Sunshine
In Ilwaco, the average sunshine in May is 8.2h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A typical high UV index of 4 in May suggests the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Ilwaco in May?
What is the average humidity in May in Ilwaco?
How much does it rain in Ilwaco in May?
When it does not snow in Ilwaco?
What is the average length of the day in May in Ilwaco?
When are sunrise and sunset in May in Ilwaco?
How long on average sun shines in May in Ilwaco?
What are the months with the highest UV index in Ilwaco?
How high is the UV index in May in Ilwaco?
Average temperature in May
Ilwaco, WA
- Average high temperature in May: 55.9°F
The warmest month (with the highest average high temperature) is August (63.9°F).
The month with the lowest average high temperature is December (46.8°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (41.5°F).
Average pressure in May
Ilwaco, WA
- Average pressure in May: 30.06"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in May
Ilwaco, WA
- Average wind speed in May: 8.5mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in May
Ilwaco, WA
- Average humidity in May: 81%
The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is April (80%).
Average rainfall in May
Ilwaco, WA
- Average rainfall in May: 0.79"
The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in May
Ilwaco, WA
- Average rainfall days in May: 11.1 days
The month with the highest number of rainy days is November (18.5 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in May
Ilwaco, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are March, April, May, June, July, August, October, November and December (0").
Average snowfall days in May
Ilwaco, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in May /
Average sunshine in May
Ilwaco, WA
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in May
Ilwaco, WA
- Average sunshine days in May: 16.7 days
The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is November (8.9 days).
Average UV index in May
Ilwaco, WA
- Average UV index in May: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in May
Ilwaco, WA
- Average cloud cover in May: 48
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in May
Ilwaco, WA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Ilwaco, Washington, USA
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