Weather Kampong Chhnang Today – Temperature, Rain & Hourly Forecast
Monday, 21/09/2026
- High/Low
- 30°/25°
- Humidity
- 86%
- Wind
- 8 km/h
- Rainfall
- 27.1 mm
- UV index
- 6.3
- Pressure
- 1012 hPa
- Sunrise
- 05:50
- Sunset
- 17:58
Today
Summary
Kampong Chhnang gets a cooler-than-usual day, 25–30°C, under thunderstorm.
Downpours near 00:00–22:00 (26.7 mm); localised flooding is possible.
Storms are forecast near 00:00–22:00.
UV peaks at 6.3 around 14:00 — wear a hat for longer stints outdoors.
At 86% humidity it feels like 31°C.
Winds of 12 km/h from the north-west.
Temperatures ease off, bottoming out at 24°C on Saturday 26/09.
The wettest day ahead is Tuesday 22/09 with about 43 mm.
Sunrise 05:50, sunset 17:58.
Best time to visit
48-hour forecast
Days ahead
| Today | Low/High | Chance of rain | Rainfall | |
|---|---|---|---|---|
| Today 21/09 | Thunderstorm | 25°30° | 100% | 27.1 mm |
| Tomorrow 22/09 | Thunderstorm | 24°30° | 100% | 43.0 mm |
| Wednesday 23/09 | Moderate showers | 25°29° | 100% | 20.4 mm |
| Thursday 24/09 | Light showers | 24°28° | 100% | 16.1 mm |
| Friday 25/09 | Light showers | 24°29° | 94% | 13.6 mm |
Monthly averages
Common questions
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Upstream rainfall · Tonlé Sap
- Past 72 hours
- 36 mm
- Next 72 hours
- 107 mm
- Status
- Elevated
- Water may arrive
- 27/09
| Upstream sampling points | Past 72 hours | Next 72 hours |
|---|---|---|
| Kampong Thom | 44 mm | 104 mm |
| Battambang | 23 mm | 132 mm |
| Pursat | 35 mm | 110 mm |
| Siem Reap | 40 mm | 100 mm |
| Cardamom highlands | 38 mm | 92 mm |
This measures upstream rainfall, not river level. Official levels and discharge come from the Mekong River Commission (MRC). Upstream rainfall causes the level, and is visible several days earlier. MRC
Tonlé Sap
The Mekong now stands higher than the lake, so the Tonlé Sap river runs backwards and pumps water in. Fish move upstream into the lake to spawn. This is when the lake expands fastest.
Mekong basin rainfall: 39 mm over the past 72 hours, 30 mm forecast for the next 72.
This is a seasonal estimate combined with basin rainfall, not a measured level. Official water level and discharge come from the Mekong River Commission (MRC). The timing of the reversal varies year to year and has shifted noticeably over the past two decades.
Why the lake reverses