Early summer · Weather & things to do
San Juan Island in June
San Juan Island warms up: highs climb to 64°F (18°C), from 60°F in May, with lows of 53°F (11°C) and about 1.5 in (37 mm) of rain.
June opens the best stretch on our comfort score, at 87/100 (4th of 12).
- Avg high
- 64°F (18°C)
- Avg low
- 53°F (11°C)
- Rain
- 1.5 in (37 mm)
- Humidity
- 78%
- Cloud cover
- 64%
- Daylight
- ~15 h 53 min
- Comfort score
- 87/100 · Great
What June feels like
Expect mild afternoons around 64°F (18°C), good for long walks.
Lows average 53°F (11°C).
About 1.5 in (37 mm) of rain falls in a typical year's June.
With about 15 h 53 min of daylight, evenings stay light late.
Plan around June
June is one of San Juan Island's best months on the climate data.
- Opens the best-scoring stretch on our comfort score: June – September.
- Longest days of the year, about 15 h 53 min of daylight.
- Comfort improves from 78/100 in May to 87/100.
- June sits inside the May – Sep window our Puget Sound Islands route recommends.
What to pack for June
- A warm layer for eveningslows near 53°F
- Comfortable walking shoesmost picks involve some walking
What to do in San Juan Island in June
June is good outdoor weather here, so these picks lean toward the open air.
Lime Kiln Point State Park
Lighthouse shoreline known as one of the best places to see orcas from land.
Why now Our curated notes say it's best summer afternoon.
Whale watching from Friday Harbor
Boat tours to find orcas, humpbacks and minke whales in Haro Strait.
Why now Our curated notes say it's best May–Sep.
American Camp
Open prairie and beaches from the 1859 Pig War, part of the national historical park.
Why now June scores 87/100 for comfort, good conditions for being outside.
English Camp
British garrison site with restored buildings and a Young Hill hike.
Why now Highs near 64°F and 1.5 in of monthly rain make this an easy outdoor pick.
The Farm at Krystal Acres
Working alpaca farm in the island's west valley, with pastures to walk and a barn shop of alpaca-wool goods.
Why now One to do outside while the weather is on your side.
Nearby in June
- Victoria in June~18 mi · highs 64°F, 1.5 in rain · similar daytime temperatures, about as wet
- Vancouver in June~52 mi · highs 69°F, 3.3 in rain · 3°C (5°F) warmer by day, wetter
- Olympic NP in June~57 mi · highs 53°F, 2.5 in rain · 6°C (11°F) cooler by day, wetter
- Bainbridge Island in June~67 mi · highs 69°F, 2.0 in rain · 3°C (5°F) warmer by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
San Juan Island in June: quick answers
Is June a good time to visit San Juan Island?
Yes. On the climate data it's one of the best months, scoring 87/100. Expect highs of 64°F (18°C) and 1.5 in (37 mm) of rain. June is inside the May – Sep window our Puget Sound Islands route recommends.
How cold is San Juan Island in June?
Average highs are 64°F (18°C) and average lows 53°F (11°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in San Juan Island in June?
Not much: about 1.5 in (37 mm) of rain falls across June on average, the 3rd-driest month of the year. The annual total is about 39.0 in (991 mm).
What should I pack for San Juan Island in June?
Bring a warm layer for evenings (lows near 53°F) and comfortable walking shoes (most picks involve some walking).
More on San Juan Island
Routes in season in June
- Puget Sound Islands May – Sep
Planning San Juan Island in June?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.