Washington, USA
Long term weather forecast
Long term weather forecast

May weather forecast and Climate
Bellingham, WA

  • Average high temperature in May: 62.2°F

Warmest month (with highest average high temperature) is August (71.8°F).
Month with lowest average high temperature is December (44.2°F).

  • Average low temperature in May: 45.5°F

Month with highest average low temperature is July (53.5°F).
Coldest month (with lowest average low temperature) is December (32°F).

  • Average rainfall in May: 2.5"

Wettest month (with highest rainfall) is November (5.8").
Driest months (with lowest rainfall) are July and August (1.2").

  • Average rainfall days in May: 12.9 days

Month with highest number of rainy days is November (19.9 days).
Month with lowest number of rainy days is July (5.9 days).

  • Average snowfall in May: 0"

Month with highest snowfall is January (3.4").
Months with lowest snowfall are April, May, June, July, August and September (0").

  • Average snowfall days in May: 0 days

Month with highest number of snowfall days is January (1.8 days).
Months with lowest number of snowfall days are May, June, July, August and September (0 days).

  • Average sea temperature in May: 54°F

Best months for swimming (with highest average sea temperature) are July and August (57°F).
Coldest months (with lowest average sea temperature) are January, February, March and December (46°F).

  • Average daylight in May: 15h

Months with longest days are June and July (Average daylight: 16h).
Month with shortest days is December (Average daylight: 8h).

  • Average sunshine in May: 7h

Month with most sunshine is July (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 2).

  • Average UV index in May: 6

Months with highest UV index are June and July (UV index 7).
Months with lowest UV index are January, February, November and December (UV index 1).