SeattlePhoto: Daniel Schwen · CC BY-SA 4.0USA · North America
Best time to visit Seattle
Seattle sits between Puget Sound and the mountains, with the Space Needle, coffee culture and Pike Place Market. The climate is mild but very rainy from October to April. Summers are dry, sunny and pleasant, the best time to visit.
Climate decision
Best travel months for Seattle
Joint highest scores
Next highest scores
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Latest 5-year values 2021–2025
Average of the five most recent complete years compared with the 1991–2025 climate average.
February · Mean daily maximum
7.3 °C
1991–2025: 8.5 °C
-1.2 °C · lower
July · Wet days
3 days/month
1991–2025: 4.8 days/month
-1.8 days/month · lower
July · Sunshine per day
8.6 h/day
1991–2025: 7.9 h/day
+0.7 h/day · higher
December · Monthly precipitation
228.8 mm/month
1991–2025: 187 mm/month
+41.8 mm/month · higher
August · Sea temperature
11.9 °C
1991–2025: 11.9 °C
0 °C · similar
June: 5/150 days at or above 30 °C; highest single value 41.9 °C.
Five-year historical sample, not a weather forecast or long-term climate trend. Individual hot days can be far above the monthly mean.
Annual profile · Seasonal contrast
Seattle: temperature opens and closes the travel window
Average daily highs span 16.7 °C across the year. This marked contrast shapes the choice of month more than small differences in rain or sunshine.
The key decision
Choose the suitable temperature range first. Within that window, dryness and sunshine identify the stronger month.
Lowest average daily low
December · 1.7 °C
Highest average daily high
August · 23.4 °C
Warmest sea
August · 11.9 °C
Most sunshine
July · 7.9 h
Month by month
Overall suitability per month. Tap a month for details.
All climate figures compared
The table is the complete accessible data view; the charts below highlight selected patterns.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Rain mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| January | 7 | 2 | 19 | 175 | 1.3 | 90 | 0.8 | 8 | 13 |
| February | 8 | 2 | 17 | 120 | 2.3 | 87 | 0.8 | 8 | 18 |
| March | 11 | 3 | 19 | 130 | 3.6 | 85 | 0.8 | 8 | 21 |
| April | 14 | 5 | 17 | 98 | 5.2 | 82 | 0.8 | 9 | 30 |
| May | 17 | 8 | 13 | 70 | 6.5 | 80 | 0.6 | 10 | 48 |
| June | 20 | 10 | 11 | 55 | 7.1 | 80 | 0.6 | 11 | 58 |
| July | 23 | 13 | 5 | 24 | 7.9 | 78 | 0.5 | 12 | 75 |
| August | 23 | 13 | 5 | 31 | 6.7 | 77 | 0.6 | 12 | 75 |
| September | 21 | 11 | 9 | 55 | 5.0 | 78 | 0.6 | 11 | 63 |
| October | 15 | 7 | 15 | 121 | 2.9 | 84 | 0.8 | 10 | 33 |
| November | 10 | 4 | 20 | 192 | 1.5 | 89 | 0.9 | 9 | 15 |
| December | 7 | 2 | 20 | 187 | 1.1 | 91 | 0.9 | 9 | 12 |
Climate through the year
Compare temperature, rainy days, sunshine and, for coastal destinations, sea temperature month by month.
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Where to stay in Seattle
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Useful next decisions
More comparisons
Similar destinations
The number is the overall climate score, not a similarity score.
Country and region
Frequently asked questions
When is the best time to visit Seattle?
The strongest climate months are July, August, September. Values are historical averages, not a forecast.
Which month has the highest average daily maximum temperature in Seattle?
The average daily maximum temperature in Seattle is highest in August at around 23 °C.
When is the sea warmest at Seattle?
In August, at around 12 °C.