Roche Harbor weather by month & the best time to visit
🇺🇸 United States · city break · oceanic / maritime climate
The best time to visit Roche Harbor is July — its sunniest month (Sunshine Score 87/100), with August close behind. Roche Harbor averages about 2,004 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 18 mm of rain in July.
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- Sun hours / year
- 2,004
- Sunniest month
- July
- Peak score
- 87/100
- Rain / year
- 991 mm
- Midday UV at peak
- 7 (high)
- Sea at warmest
- 17°C / 63°F
- Population
- 487k
- Elevation
- 38 m
When is the best time to visit Roche Harbor?
For sunshine, the best time to visit Roche Harbor is July, then August. The dullest month is January (0/100, 147 mm of rain). The full month-by-month picture is in the table below.
How sunny is Roche Harbor?
Roche Harbor gets a moderate 2,004 hours of sunshine a year. 87 Sunshine Score points separate July (87) from January (0), so the month you pick matters. It ranks #408 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. Rain has a clear season: the wettest stretch, around December, carries about 44% of the annual 991 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 7° / 45°F | 4° / 39°F | 147 mm | 0 | 8° / 46°F |
| February | 0 | 7° / 45°F | 4° / 39°F | 84 mm | 1 | 8° / 46°F |
| March | 6 | 9° / 48°F | 5° / 41°F | 106 mm | 2 | 8° / 46°F |
| April | 26 | 12° / 54°F | 7° / 45°F | 70 mm | 4 | 10° / 50°F |
| May | 47 | 15° / 59°F | 9° / 48°F | 52 mm | 5 | 12° / 54°F |
| June | 70 | 18° / 64°F | 11° / 52°F | 37 mm | 6 | 14° / 57°F |
| July | 87 | 21° / 70°F | 13° / 55°F | 18 mm | 7 | 17° / 63°F |
| August | 85 | 21° / 70°F | 14° / 57°F | 27 mm | 6 | 17° / 63°F |
| September | 68 | 18° / 64°F | 12° / 54°F | 50 mm | 4 | 16° / 61°F |
| October | 29 | 13° / 55°F | 9° / 48°F | 109 mm | 2 | 12° / 54°F |
| November | 5 | 9° / 48°F | 6° / 43°F | 154 mm | 1 | 10° / 50°F |
| December | 0 | 7° / 45°F | 4° / 39°F | 137 mm | 0 | 9° / 48°F |
Sea temperature in Roche Harbor by month
The sea off Roche Harbor is warmest in July at around 17°C / 63°F, and coolest in January at 8°C / 46°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Roche Harbor on the interactive sunshine globe →
Nearby places for sunshine
- Victoria (British Columbia) Canada · 22 km · best in Jul · 2,004 h sun/yr
- Bellingham United States · 48 km · best in Jul · 2,005 h sun/yr
- Vancouver Canada · 65 km · best in Jul · 1,739 h sun/yr
- Nanaimo Canada · 73 km · best in Jul · 1,738 h sun/yr
- Abbotsford Canada · 73 km · best in Jul · 1,738 h sun/yr
- Seattle United States · 143 km · best in Jul · 1,896 h sun/yr
Nearest destinations
- Friday Harbor United States · 13 km · 2,003 h sun/yr · best in Jul
- Eastsound United States · 20 km · 2,004 h sun/yr · best in Jul
- Lopez United States · 21 km · 2,003 h sun/yr · best in Jul
- Blakely United States · 23 km · 2,004 h sun/yr · best in Jul
- Center United States · 26 km · 2,003 h sun/yr · best in Jul
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