The highest day temperature in May 2023 was 91°F. The lowest night temperature was 43°F. The average values for day and night temperatures during May were 68.7°F и 50.9°F respectivly.

The average sea surface temperature in May 2023 for Bellingham was 53.8°F. The maximum and minimum values were 50.6°F and 58.4°F respectively.

Most of the days in May are gloomy but you can also expect sunny days.

Precipitation total in May for Bellingham is 1.4 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 3.5 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Bellingham in May is 6.7 hours.