The honest answer to when you should fly Seattle to Cancun is mostly about weather and demand at the far end. On three years of daily observations at the arrival airport, Jan-Feb, Apr, Dec gives the most comfortable combination of temperature and rainfall in Cancun.
Averages below come from three full years of daily readings at Cancun’s main airport, not from a seasonal generalisation. The warmest month is May (average high 32°C), the coolest is January (average low 21°C), and the wettest is June (240 mm).
| Month | Avg high | Avg low | Rainfall | Wet days | Seattle high |
|---|---|---|---|---|---|
| January good | 27°C | 21°C | 61 mm | 14 | 7°C |
| February good | 27°C | 21°C | 30 mm | 9 | 8°C |
| March | 29°C | 23°C | 41 mm | 13 | 11°C |
| April good | 30°C | 24°C | 47 mm | 10 | 14°C |
| May | 32°C | 26°C | 44 mm | 10 | 18°C |
| June | 31°C | 26°C | 240 mm | 23 | 22°C |
| July | 32°C | 25°C | 134 mm | 18 | 26°C |
| August | 32°C | 25°C | 140 mm | 22 | 25°C |
| September | 31°C | 25°C | 170 mm | 23 | 21°C |
| October | 30°C | 24°C | 178 mm | 22 | 15°C |
| November | 29°C | 23°C | 111 mm | 16 | 10°C |
| December good | 27°C | 22°C | 88 mm | 13 | 9°C |
Climate data: Open-Meteo reanalysis archive.
Cancun runs 1 hour ahead of Seattle. Travelling east is the harder direction to adjust to, so if the trip is short, an early departure that lands in daylight is worth more than a marginally cheaper overnight.
We publish observed fares for this route when we have them, and say nothing when we do not — there is no estimate on this page. What holds regardless of the route:
Midweek departures are consistently cheaper than Friday and Sunday on most routes, because that is where demand sits rather than because of any pricing trick. Where we have observed fares for Seattle–Cancun, the weekday breakdown appears further down this page; where we do not, we leave it out rather than estimate it.
Top-rated tours and experiences in Cancun, ranked by traveller rating. Prices are per person and change with date and group size.
Nightly rates in Cancun for a sample two-night stay for two adults from 29 Sep 2026, cheapest first. Rates move with your dates — check availability for a live quote.
