Phnom Penh Future Trends
Cambodia · Asia · Trend-based projections to 2050
This page projects Phnom Penh's weather to 2030, 2040 and 2050, fitting one trend line per variable to its own 50-year ERA5 record. Around it sits a statistical range: temperature, tropical days and frost days get a Best and Worst scenario; precipitation and sunshine hours get a Low and High estimate instead, since more or less rain or sun isn't inherently better or worse. An R² score shows how closely the trend fits the record, so a lower R² means more year-to-year noise. Which variable in Phnom Penh shifts hardest, and how firmly the record backs that line, is laid out per trajectory below.
Data through November 2, 2026.
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Frequently asked questions about Phnom Penh's projected trends
How warm will Phnom Penh be in 2050?
Extrapolated from Phnom Penh's own record since 1976, the average daytime high in 2050 works out at roughly 32.5°C, down 0.3°C from 2026. This is a straight-line projection of measured weather data, not a climate model or a scenario-based forecast.
How certain is the temperature projection for Phnom Penh?
The 2050 range runs from 32.0°C to 33.0°C. That spread comes from the 95% confidence interval on the trend line's own slope, so the noisier Phnom Penh's record, the wider the band. The trend accounts for 6% of the variation between years; the rest is ordinary year-to-year swing.
How many days above 30°C will Phnom Penh get in 2050?
The trend line lands on roughly 314 days above 30°C a year in 2050, against 272 in 2026. These are the days that set peak cooling demand, so this figure matters more for grid planning and building design than the annual average above.
Will Phnom Penh still get frost in 2050?
Phnom Penh already recorded no frost days in 2026, and the trend line does not change that. Frost is not a useful measure here, though the heat figures above are.
Is Phnom Penh getting wetter or drier by 2050?
The trend line lands on roughly 1411mm of precipitation a year in 2050, against 1144mm in 2026, so wetter. An annual total says little about distribution though: the same rainfall can arrive in shorter, harder bursts, and that is what loads drains and water storage.
Will Phnom Penh get more sunshine by 2050?
The trend line lands on roughly 3523 sunshine hours a year in 2050, against 2995 in 2026, so more sun. Sunshine hours bear directly on rooftop solar yield, though heat works against it at the same time: a panel loses efficiency at high temperatures.
