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Best time to visit · Washington, United States
For the most comfortable weather in Olympic NP, aim for July & August. July tops our comfort score at 85/100, with highs around 59°F (15°C) and 1.2 in (31 mm) of rain. September is a good shoulder-season month. The toughest months are November – January, mainly because of cool days.
Highs run from 31°F to 59°F across the year, and the yearly total is about 73.9 in (1877 mm) of rain and snow.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 32°F0°C | 31°F0°C | 34°F1°C | 40°F4°C | 48°F9°C | 53°F11°C | 59°F15°C | 59°F15°C | 53°F12°C | 44°F7°C | 35°F2°C | 31°F-1°C |
| Avg low | 25°F-4°C | 23°F-5°C | 25°F-4°C | 28°F-2°C | 33°F1°C | 37°F3°C | 42°F5°C | 42°F6°C | 39°F4°C | 33°F0°C | 27°F-3°C | 24°F-5°C |
| Rain/snow | 11.3 in286 mm | 6.4 in162 mm | 8.8 in224 mm | 5.4 in137 mm | 3.4 in86 mm | 2.5 in63 mm | 1.2 in31 mm | 1.7 in42 mm | 3.4 in86 mm | 7.8 in198 mm | 11.5 in292 mm | 10.6 in270 mm |
| Humidity | 93% | 91% | 90% | 85% | 81% | 81% | 79% | 79% | 82% | 88% | 92% | 93% |
| Cloud | 80% | 74% | 79% | 75% | 70% | 68% | 47% | 48% | 53% | 68% | 77% | 79% |
| Comfort | 18 | 31 | 22 | 33 | 54 | 65 | 85 | 85 | 69 | 34 | 19 | 19 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. Temperatures were adjusted from the grid cell's ~664 m (2,179 ft) to Olympic NP's ~1,317 m (4,321 ft) elevation using the standard lapse rate of 6.5°C per 1,000 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The cold peaks here: highs of 31–32°F (-1–0°C), and nights reach 23°F (-5°C). It's the wettest season, with about 28.3 in (718 mm) of rain or snow, 38% of the year's total. December – February are cold enough for snow. Comfort scores bottom out in December & January; the season averages 23/100.
Temperatures climb through the season, from 34°F highs in March to 48°F by May. About 17.6 in (447 mm) of rain or snow falls across these months, 24% of the year's total. March & April are cold enough for snow. Comfort scores sit mid-table, averaging 36/100.
The warmest stretch of the year, with highs of 53–59°F (11–15°C). It's the driest season, with only about 5.4 in (136 mm) of rain, 7% of the year's total. Lows bottom out around 37°F (3°C). Comfort peaks here: July & August rank with the year's best, and the season averages 78/100.
Temperatures slide from 53°F highs in September to 35°F by November. About 22.7 in (576 mm) of rain or snow falls across these months, 31% of the year's total. November is cold enough for snow. It holds the toughest stretch on our comfort score (November), averaging 41/100.
By comfort score: 2 Great, 2 Good, 1 Fair and 7 Tough. Great months: July & August. Tap a month for its own guide.
For the most comfortable weather in Olympic NP, aim for July & August. July tops our comfort score at 85/100, with highs around 59°F (15°C) and 1.2 in (31 mm) of rain. September is a good shoulder-season month. The toughest months are November – January, mainly because of cool days.
November is the wettest month, averaging about 11.5 in (292 mm) of rain or snow. July is the driest, with about 1.2 in (31 mm). The yearly total is around 73.9 in (1877 mm).
February is the coldest, with average lows of 23°F (-5°C) and highs of 31°F (0°C). The warmest is August, with average highs of 59°F (15°C).
Not very: summer (June – August) humidity averages 80%, and highs peak around 59°F (15°C), so it rarely feels sticky.
On average, yes: lows fall below 32°F (0°C) in November – April, bottoming out around 23°F (-5°C) in February.
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