Will it rain today in Phnom Penh?
Should you take an umbrella in Phnom Penh? The forecast below loads live every time you open the page: rain now, when the next shower comes, and how much falls today and tomorrow.
Rain right now
It is raining in Phnom Penh right now: light rain. Today’s total: 14 mm over 18 wet hours. Tomorrow: 9.7 mm of rain.
As of 2026-10-16 17:35 UTC (NOAA GFS snapshot). Updating live…
Rain every 3 hours, today and tomorrow
Today · Saturday 17 October
14 mm of rain, 18 wet hours, up to 1.4 mm/h.
Every 3 hours as a table
| Hours | Rain (mm) | mm/h | Type |
|---|---|---|---|
| 22:00–01:00 | 1.9 | 0.6 | light · rain |
| 01:00–04:00 | 0.3 | 0.1 | dry |
| 04:00–07:00 | 0 | 0 | dry |
| 07:00–10:00 | 0.8 | 0.3 | light · rain |
| 10:00–13:00 | 1.0 | 0.4 | light · rain |
| 13:00–16:00 | 2.6 | 0.9 | light · rain |
| 16:00–19:00 | 4.3 | 1.4 | light · rain |
| 19:00–22:00 | 3.4 | 1.2 | light · rain |
Tomorrow · Sunday 18 October
9.7 mm of rain, 18 wet hours, up to 1.2 mm/h. (the forecast covers part of the day)
Every 3 hours as a table
| Hours | Rain (mm) | mm/h | Type |
|---|---|---|---|
| 22:00–01:00 | 3.6 | 1.2 | light · rain |
| 01:00–04:00 | 0.9 | 0.3 | light · rain |
| 04:00–07:00 | 0 | 0 | dry |
| 07:00–10:00 | 0.3 | 0.1 | light · rain |
| 10:00–13:00 | 1.4 | 0.5 | light · rain |
| 13:00–16:00 | 1.3 | 0.4 | light · rain |
| 16:00–19:00 | 2.2 | 0.7 | light · rain |
Times in local time (Asia/Phnom_Penh). Each bar is the rain over 3 hours; striped bars are snow.
Rain map around Phnom Penh
The same NOAA GFS precipitation on the map, moving hour by hour: blue light, darker heavy. Tap for the value.
How much it rains in Phnom Penh, month by month
Phnom Penh gets about 1,242 mm of rain a year. The wettest month is June (190 mm), the driest February (11 mm); a normal October brings 167 mm.
Average monthly rain and snow (water equivalent) 2001–2025, NASA POWER (MERRA-2 reanalysis, public domain), on a ~50 km grid: mountains and coasts can differ locally.
More for Phnom Penh
Weather in Phnom Penh now · Rain totals map · Thunderstorms · Cloud map
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Questions
- Will it rain today in Phnom Penh?
- At 17 October 2026 the forecast said: It is raining in Phnom Penh right now: light rain. Today’s total: 14 mm over 18 wet hours. Tomorrow: 9.7 mm of rain. The box at the top of the page loads the latest NOAA GFS forecast every time you open it, with the time the next rain starts.
- How much does it rain in Phnom Penh?
- About 1,242 mm a year on average (2001–2025). June is the wettest month with 190 mm, February the driest with 11 mm.
- What do the rain amounts mean?
- 1 mm is a litre of water per square metre. Under 2.5 mm an hour is light rain (a drizzle to a steady rain), 2.5–7.6 moderate, above 7.6 heavy: you get soaked in minutes and streets can flood.
- How accurate is the forecast?
- It is the global NOAA GFS model on a 0.25° grid every 3 hours: good at telling a rainy day from a dry one, less at placing a single summer thunderstorm. Check the rain map for the showers moving around Phnom Penh.
Rain forecast nearby
Phu Quoc · Ho Chi Minh City · Siem Reap · Pattaya · Nha Trang · Bangkok
How this page works
The rain is the one the rain layer of the map paints: NOAA GFS forecast (public domain), precipitation rate averaged over 3 hours, read at Phnom Penh and summed per local day. Rain or snow comes from the GFS precipitation type. The monthly normals are NASA POWER. No third-party weather service.