Average Sunshine in Washington for January
Number of Sunny Days
In the table below, the average number of Sunny Days for a city in Washington is the total days this month when the sky is mostly clear. This includes the days when cloud covers up to 30% of the sky during daylight hours.
Partly Sunny Days have cloud covering from 40% to 70% of the sky during the daytime.
Total Days With Sun is a sum of the Sunny plus Partly Sunny days. The rest of the days are mainly overcast, with at least 80% cloud cover. All the numbers are annual averages, made from years of weather watching.
| City | Sunny | Partly Sunny | Total Days With Sun |
|---|---|---|---|
| Olympia | 2 | 4 | 6 |
| Quillayute | 3 | 3 | 6 |
| Seattle | 3 | 5 | 8 |
| Spokane | 3 | 4 | 7 |
| Yakima | 4 | 5 | 9 |
Amount of Sun
Here's another way to look at how much sunshine a city gets. The % Sun number measures the percentage of time between sunrise and sunset that sunshine reaches the ground. Again, these amounts are monthly averages based on many years of weather observations.
| City | % Sun |
|---|---|
| Quillayute | 22 |
| Seattle | 28 |
| Spokane | 28 |
Reference
National Climatic Data Center. Comparative Climatic Data.