Friday Harbor, WA weather in May
In May, Friday Harbor sees highs around 64°F and lows around 44°F: cool, with some rain. Rain falls on about 10 days. Great for outdoor plans.
- Normal high
- 64°F
- Normal low
- 44°F
- Wet days
- 10
- 1.1 in total
- Muggy days
- 0
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 61°F | 66°F |
| Normal low | 42°F | 47°F |
| Chance of a wet day | 31% | 29% |
| Sunrise / sunset | 5:52 am / 8:26 pm | 5:15 am / 9:04 pm |
| Daylight | 14.6 h | 15.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical May day
- 6 am50°Fdew point 46°F
- 9 am55°Fdew point 47°F
- Noon59°Fdew point 47°F
- 3 pm61°Fdew point 46°F
- 6 pm60°Fdew point 46°F
- 9 pm54°Fdew point 46°F
NOAA hourly normals (local standard time) from Bellingham Intl Airport (28 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F10 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph0 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in3 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 1.1 in; a dry May brings about 0.5 in and a wet one about 1.6 in (25th and 75th percentiles). Days with half an inch or more are rare. Snow is very rare.
How May varies from year to year
- Warmest May, 1991-20202019: average high 69°F
- Coolest May1999: average high 59°F
- Wettest May2011: 2.8 in
- Driest May2018: 0.02 in
- Highest reading83°F (May 26, 2005)
- Lowest reading30°F (May 7, 2002)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 57°F | 64°F | 68°F |
| Normal low | 41°F | 44°F | 48°F |
| Wet days | 10 | 10 | 8 |
| Comfortable days | 3 | 10 | 18 |
| Daylight | 13.7 h | 15.3 h | 16.1 h |
Highs change by +7°F from April and +4°F into June.
Nearby alternatives in May
- Warmer: Leavenworth, WA127 mi · high 71°F · 7 wet days
How Friday Harbor ranks in May
- Normal high348th warmest of 378 cities; 8th of 9 in Washington
- Wet days188th driest of 378
- Comfortable days219th most of 339
What to pack for Friday Harbor in May
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
May has 341 heating degree days and 0 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How cold is Friday Harbor in May?
The normal high is 64°F and the normal low is 44°F. From 1991 to 2020 the coldest May reading was 30°F (May 7, 2002).
Does it rain a lot in Friday Harbor in May?
About 10 days in May have at least 0.01 in of precipitation, and the normal total is 1.1 in. The wettest May in 1991-2020 was in 2011 (2.8 in); the driest was in 2018 (0.02 in).
Is May a good time to visit Friday Harbor?
May ranks 5th of 12 months on our comfort score for Friday Harbor (70 out of 100). It has about 10 comfortable days. The best months are July and August.
Where the numbers come from
- Temperature, rain and frost dates: Friday Harbor Airport (USW00094276), 0.9 mi SSW of the city center, 109 ft (51 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Olga 2 Se (USC00456096), 11 mi ENE of the city center, 80 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Bellingham Intl Airport (USW00024217), 28 mi NE of the city center, 149 ft (91 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Bellingham Intl Airport (727976-24217), 28 mi NE of the city center, 151 ft (93 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).