The honest answer to when you should fly Phnom Penh to Monterrey is mostly about weather and demand at the far end. On three years of daily observations at the arrival airport, Jan-Feb, Nov-Dec gives the most comfortable combination of temperature and rainfall in Monterrey.
Averages below come from three full years of daily readings at Monterrey’s main airport, not from a seasonal generalisation. The warmest month is August (average high 36°C), the coolest is January (average low 9°C), and the wettest is June (124 mm).
| Month | Avg high | Avg low | Rainfall | Wet days | Phnom Penh high |
|---|---|---|---|---|---|
| January good | 20°C | 9°C | 14 mm | 3 | 32°C |
| February good | 27°C | 13°C | 16 mm | 2 | 34°C |
| March | 30°C | 16°C | 26 mm | 3 | 35°C |
| April | 32°C | 20°C | 27 mm | 6 | 36°C |
| May | 34°C | 23°C | 64 mm | 11 | 34°C |
| June | 35°C | 24°C | 124 mm | 10 | 33°C |
| July | 34°C | 24°C | 51 mm | 8 | 32°C |
| August | 36°C | 25°C | 59 mm | 6 | 33°C |
| September | 33°C | 23°C | 67 mm | 9 | 31°C |
| October | 29°C | 19°C | 83 mm | 9 | 31°C |
| November good | 25°C | 15°C | 46 mm | 5 | 31°C |
| December good | 23°C | 12°C | 25 mm | 5 | 32°C |
Climate data: Open-Meteo reanalysis archive.
Monterrey runs 13 hours behind Phnom Penh. Travelling west is generally the easier direction, and you gain usable hours on the day you fly out.
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 Phnom Penh–Monterrey, 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 Monterrey, ranked by traveller rating. Prices are per person and change with date and group size.
Nightly rates in Monterrey 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.
