When to go · SeaTac
SeaTac in July
Great month. Inside SeaTac's best window: May–Oct (mild weather, fewer rain days).
Key facts
- Verdict
- Great
- Temperature
- 26°C (79°F)79°F (26°C) / 14°C (57°F)57°F (14°C)
- average high / low
- Rain days
- 5
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Inside SeaTac's best window: May–Oct (mild weather, fewer rain days).
Is another month better than July?
No other month rates higher than July for SeaTac in this guide.
Weather in July
- SeaTacHighs around 26 °C (79 °F), lows around 14 °C (57 °F), rain on about 5 daysHighs around 79 °F (26 °C), lows around 57 °F (14 °C), rain on about 5 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Independence Day big impact
4 Jul · United States
Fireworks and parades; parks, beaches and flights busy.
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Peak season: parks full, 4 July crowds, 40 °C+ in the desert, humid East. Alaska and the Pacific Northwest are at their best.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in SeaTac, side by side.
Verdict
Jul: Great
May: Great
Daytime high
Jul: 26 °C (79 °F)79 °F (26 °C)
May: 19 °C (66 °F)66 °F (19 °C)
Night low
Jul: 14 °C (57 °F)57 °F (14 °C)
May: 9 °C (48 °F)48 °F (9 °C)
Rain days
Jul: 5 (better)
May: 6
Crowds
Jul: High
May: Medium
Prices
Jul: High
May: Medium
Festivals listed
Jul: 1
May: 1
July: Inside SeaTac's best window: May–Oct (mild weather, fewer rain days).
May: Inside SeaTac's best window: May–Oct (mild weather, fewer rain days).
SeaTac: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.