Olympia Climate by Month
Olympia, Washington, United States
Warm summers and cool winters, with rain spread through the year.
The climate in Olympia is one of warm summers and cool winters, with rain spread through the year. Expect highs of 78°F (25°C) in August and 46°F (8°C) in December, with the coldest nights (January) near 34°F (1°C). It gets 49 in (1256 mm) of rain a year, spread across the months. The air is humid, averaging 79% relative humidity.
- Warmest month
- 78°F(25°C)
- Average high, August
- Coldest nights
- 34°F(1°C)
- Average low, January
- Rain per year
- 49 in(1256 mm)
- No clear rainy season
- Humidity
- 79%
- Sunniest: July
Best and worst months in Olympia
Best for weatherJuly and August are the best time for weather in Olympia: highs near 77°F (25°C) and about 0.8 in (20 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; December is the coldest, with highs of only 46°F (8°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in July.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Olympia weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 47°F(8°C) | 34°F(1°C) | 7.6 in(194 mm) | 93% | 1.0 |
| FebFebruary | 50°F(10°C) | 34°F(1°C) | 5.0 in(127 mm) | 88% | 1.9 |
| MarMarch | 55°F(13°C) | 36°F(2°C) | 5.6 in(141 mm) | 77% | 2.7 |
| AprApril | 60°F(16°C) | 39°F(4°C) | 3.6 in(92 mm) | 75% | 4.0 |
| MayMay | 67°F(19°C) | 44°F(7°C) | 2.1 in(54 mm) | 73% | 5.0 |
| JunJune | 71°F(22°C) | 49°F(9°C) | 1.5 in(39 mm) | 68% | 5.3 |
| JulJulyBest | 77°F(25°C) | 52°F(11°C) | 0.6 in(14 mm) | 68% | 5.8 |
| AugAugustBest | 78°F(25°C) | 52°F(11°C) | 1.0 in(25 mm) | 67% | 5.1 |
| SepSeptember | 73°F(23°C) | 48°F(9°C) | 1.7 in(44 mm) | 73% | 3.7 |
| OctOctober | 62°F(17°C) | 43°F(6°C) | 4.8 in(122 mm) | 82% | 1.9 |
| NovNovember | 52°F(11°C) | 38°F(3°C) | 8.2 in(208 mm) | 88% | 1.1 |
| DecDecember | 46°F(8°C) | 34°F(1°C) | 7.7 in(196 mm) | 95% | 0.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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