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
May's arrival in Sammamish, Washington, brings a slight change in high-temperatures, adjusting from a mild 55.8°F (13.2°C) in April to a comfortable 64.4°F (18°C). Sammamish notes a substantial temperature decline from the daytime peaks throughout May, with an average nighttime temperature of 42.6°F (5.9°C).Humidity
The average relative humidity in May is 75%.Rainfall
In Sammamish, Washington, during May, the rain falls for 10.5 days and regularly aggregates up to 0.79" (20mm) of precipitation. In Sammamish, Washington, during the entire year, the rain falls for 136.7 days and collects up to 13.39" (340mm) of precipitation.Snowfall
In Sammamish, Washington, snow does not fall in May through October.Daylight
The average length of the day in May in Sammamish is 15h and 10min.On the first day of the month, sunrise is at 5:49 am and sunset at 8:20 pm. On the last day of May, sunrise is at 5:14 am and sunset at 8:57 pm PDT.
Sunshine
The average sunshine in May in Sammamish, Washington, is 9h.UV index
The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 4 during May translates into these guidelines:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What is the average May temperature in Sammamish?
What is the average humidity in May in Sammamish?
How much does it rain in Sammamish in May?
When it does not snow in Sammamish?
Does it snow in Sammamish in May?
How many hours of daylight does Sammamish have in May?
What time are sunrise and sunset in May in Sammamish?
How long on average sun shines in May in Sammamish?
What is the UV index reading in May in Sammamish?
Average temperature in May
Sammamish, WA
- Average high temperature in May: 64.4°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in May: 42.6°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in May
Sammamish, WA
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in May
Sammamish, WA
- Average wind speed in May: 3.8mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in May
Sammamish, WA
- Average humidity in May: 75%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (70%).
Average rainfall in May
Sammamish, WA
- Average rainfall in May: 0.79"
The wettest month (with the highest rainfall) is December (1.85").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in May
Sammamish, WA
- Average rainfall days in May: 10.5 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in May
Sammamish, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Sammamish, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in May /
Average sunshine in May
Sammamish, WA
- Average daylight in May: 15h and 1min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).
Average sunshine days in May
Sammamish, WA
- Average sunshine days in May: 17.7 days
The month with the most sunshine days is August (24 days).
The month with the least sunshine days is November (13.5 days).
Average UV index in May
Sammamish, WA
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Sammamish, WA
- Average cloud cover in May: 44
The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in May
Sammamish, WA
- Average visibility in May: 5mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (5mi).
Sammamish, Washington, USA
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