Temperatures in May
It's cool to moderate in May in Ketchikan with an average temperature of 15°C. Temperatures this month range from a low of 11°C to a high of 17°C. At night, you can expect temperatures between 6°C and 10°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Ketchikan in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in Ketchikan with cool temperatures, averaging around 14°C during the day and nights close to 7°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-May
By mid-May, the average daytime temperature rises to around 16°C, with nights close to 9°C. The chance of precipitation is high during this period.
End of May
By the end of May, the average daytime temperature in Ketchikan will be around 16°C, with nights close to 9°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Water temperature
The water temperature at Ketchikan is 12°C this month. This is too cold to swim without protective gear.
Precipitation in May
In May, there is an average of 173 mm of precipitation, spread over 13 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 40% per day this month. The weather’s variable. There are also a few days with higher precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for Ketchikan. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Ketchikan in May |
London | ||
|---|---|---|---|
 Average Temperature |
15°C | 18°C | |
 High Temp |
17°C | 21°C | |
| Low Temp |
11°C | 15°C | |
 Total Precipitation |
173 mm | 46 mm | |
| Rainy Days |
13 days | 8 days | |
April
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit Ketchikan?
Looking for sun and warm weather? Then May isn’t the best time to be in Ketchikan. The temperature is too low this month for a warm stay.
Temperature records for Ketchikan in May
With 26°C, Ketchikan hit the highest temperature in the last 10 years in May 2020. The lowest daytime temperature in this month was 7°C in 2022. The extreme night temperatures ranged from a low of 0°C to a high of 13°C.
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Daily Temperature in May in Ketchikan
This chart shows the average daily temperatures, both day and night, for each day in May in Ketchikan, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in Ketchikan
The chart below shows the average daily precipitation in May for Ketchikan, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 13 days of rain in Ketchikan.
Daily UV Index in May in Ketchikan
This chart shows the average daily UV index in May in Ketchikan, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Ketchikan Over the Years
This chart shows the average temperature in May in Ketchikan, measured in degrees Celsius, over the past years.
Total Precipitation in May in Ketchikan Over the Years
This chart shows the average precipitation in May in Ketchikan, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for Ketchikan
Click on a specific day in May for detailed info on the typical weather on that day in Ketchikan. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Ketchikan
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Average Weather in Ketchikan by Month
Click on a month below to see detailed weather info for Ketchikan. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Ketchikan for all months at once
