When to go · SeaTac
SeaTac, month by month
The best months for SeaTac: May, Jun, Jul, Aug, Sep, Oct. Months to avoid: Jan, Feb, Mar, Apr, Nov, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Nov–Apr (rainier, colder).7 °C (45 °F) / 0 °C (32 °F), 12 rain days45 °F (7 °C) / 32 °F (0 °C), 12 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Nov–Apr (rainier, colder).9 °C (48 °F) / 1 °C (34 °F), 10 rain days48 °F (9 °C) / 34 °F (1 °C), 10 rain daysCrowds: Low · 1 festival or holiday
- MarchAvoidListed as a month to avoid: Nov–Apr (rainier, colder).12 °C (54 °F) / 3 °C (37 °F), 9 rain days54 °F (12 °C) / 37 °F (3 °C), 9 rain daysCrowds: Medium · 2 festivals or holidays
- AprilAvoidListed as a month to avoid: Nov–Apr (rainier, colder).15 °C (59 °F) / 5 °C (41 °F), 8 rain days59 °F (15 °C) / 41 °F (5 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside SeaTac's best window: May–Oct (mild weather, fewer rain days).19 °C (66 °F) / 9 °C (48 °F), 6 rain days66 °F (19 °C) / 48 °F (9 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside SeaTac's best window: May–Oct (mild weather, fewer rain days).23 °C (73 °F) / 12 °C (54 °F), 5 rain days73 °F (23 °C) / 54 °F (12 °C), 5 rain daysCrowds: High
- JulyGreatInside SeaTac's best window: May–Oct (mild weather, fewer rain days).26 °C (79 °F) / 14 °C (57 °F), 5 rain days79 °F (26 °C) / 57 °F (14 °C), 5 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside SeaTac's best window: May–Oct (mild weather, fewer rain days).26 °C (79 °F) / 14 °C (57 °F), 6 rain days79 °F (26 °C) / 57 °F (14 °C), 6 rain daysCrowds: High
- SeptemberGreatInside SeaTac's best window: May–Oct (mild weather, fewer rain days).23 °C (73 °F) / 12 °C (54 °F), 7 rain days73 °F (23 °C) / 54 °F (12 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside SeaTac's best window: May–Oct (mild weather, fewer rain days).18 °C (64 °F) / 9 °C (48 °F), 9 rain days64 °F (18 °C) / 48 °F (9 °C), 9 rain daysCrowds: Medium
- NovemberAvoidListed as a month to avoid: Nov–Apr (rainier, colder).11 °C (52 °F) / 4 °C (39 °F), 11 rain days52 °F (11 °C) / 39 °F (4 °C), 11 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Nov–Apr (rainier, colder).7 °C (45 °F) / 1 °C (34 °F), 12 rain days45 °F (7 °C) / 34 °F (1 °C), 12 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in SeaTac, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 19 °C (66 °F)66 °F (19 °C)
Jun: 23 °C (73 °F)73 °F (23 °C)
Night low
May: 9 °C (48 °F)48 °F (9 °C)
Jun: 12 °C (54 °F)54 °F (12 °C)
Rain days
May: 6
Jun: 5 (better)
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside SeaTac's best window: May–Oct (mild weather, fewer rain days).
June: Inside SeaTac's best window: May–Oct (mild weather, fewer rain days).
SeaTac: figures are long-term averages from this guide, not a forecast.