Spanaway Climate by Month
Spanaway, Washington, United States
Warm summers and cool winters, with rain spread through the year.
Warm summers and cool winters, with rain spread through the year: that's Spanaway's climate in short. August is the warmest month, with highs around 78°F (25°C); December is the coolest at 46°F (8°C), and nights dip to 34°F (1°C). It gets 44 in (1125 mm) of rain a year, spread across the months.
- Warmest month
- 78°F(25°C)
- Average high, August
- Coldest nights
- 34°F(1°C)
- Average low, February
- Rain per year
- 44 in(1125 mm)
- No clear rainy season
- Humidity
- 74%
- Sunniest: July
Best and worst months in Spanaway
Best for weatherThe most comfortable weather comes in July and August, with highs around 77°F (25°C) and about 0.9 in (22 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)
Spanaway weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 46°F(8°C) | 34°F(1°C) | 6.4 in(162 mm) | 83% | 1.0 |
| FebFebruary | 49°F(9°C) | 34°F(1°C) | 4.5 in(114 mm) | 79% | 2.0 |
| MarMarch | 53°F(12°C) | 37°F(3°C) | 4.9 in(124 mm) | 79% | 2.7 |
| AprApril | 58°F(15°C) | 40°F(4°C) | 3.5 in(90 mm) | 76% | 4.1 |
| MayMay | 65°F(18°C) | 45°F(7°C) | 2.2 in(56 mm) | 67% | 5.1 |
| JunJune | 70°F(21°C) | 49°F(10°C) | 1.8 in(46 mm) | 69% | 5.3 |
| JulJulyBest | 77°F(25°C) | 53°F(12°C) | 0.7 in(17 mm) | 62% | 5.9 |
| AugAugustBest | 78°F(25°C) | 53°F(12°C) | 1.1 in(27 mm) | 66% | 5.1 |
| SepSeptember | 72°F(22°C) | 49°F(9°C) | 1.7 in(44 mm) | 67% | 3.8 |
| OctOctober | 61°F(16°C) | 43°F(6°C) | 4.2 in(107 mm) | 76% | 2.0 |
| NovNovember | 51°F(11°C) | 37°F(3°C) | 6.9 in(174 mm) | 81% | 1.1 |
| DecDecember | 46°F(8°C) | 34°F(1°C) | 6.5 in(164 mm) | 83% | 0.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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