5-day weather forecast Phnom Penh 21-08-2026
Weather forecast Phnom Penh today 21.08.2026: overcast, temperature from 26 °C to 36 °C.
Precipitation probability 20%. Wind up to 10.19 m/s (gusts 12.72 m/s). Air humidity 35–76%, atmospheric pressure 755–758 mm Hg, UV index up to 12.1.
5 days at a glance — tap a day to open it
Sunrise 05:50
Sunset 18:16
Sunset 18:16
First Quarter69% illuminated
Moonrise 13:17 · Moonset 00:00
Moonrise 13:17 · Moonset 00:00
Chart
Table
Fri, Aug 21, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 27 °C | 20% | 97% | 76% | 758 mm Hg | SW 234° 5.69 (12.22) m/s | 0 |
| 01:00 | Overcast | 27 °C | 20% | 97% | 75% | 757 mm Hg | WSW 237° 5.31 (11.5) m/s | 0 |
| 02:00 | Overcast | 26 °C | 20% | 100% | 74% | 757 mm Hg | SW 232° 5 (10.61) m/s | 0 |
| 03:00 | Overcast | 26 °C | 19% | 100% | 72% | 756 mm Hg | SW 236° 5.39 (11.61) m/s | 0 |
| 04:00 | Overcast | 26 °C | 19% | 100% | 72% | 756 mm Hg | SW 226° 4.89 (10.72) m/s | 0 |
| 05:00 | Overcast | 26 °C | 19% | 99% | 72% | 757 mm Hg | SW 219° 4.69 (10.22) m/s | 0 |
| 06:00 |  Overcast | 26 °C | 20% | 100% | 74% | 757 mm Hg | SW 218° 4.31 (9.72) m/s | 0 |
| 07:00 | Overcast | 27 °C | 18% | 100% | 71% | 758 mm Hg | SSW 210° 4.61 (10.81) m/s | 0.6 |
| 08:00 | Overcast | 29 °C | 14% | 100% | 60% | 758 mm Hg | SW 230° 6.5 (10.92) m/s | 2.2 |
| 09:00 | Overcast | 31 °C | 12% | 100% | 53% | 758 mm Hg | WSW 240° 7.69 (11.11) m/s | 4.4 |
| 10:00 | Overcast | 33 °C | 10% | 100% | 44% | 758 mm Hg | WSW 240° 8.19 (11.42) m/s | 7.8 |
| 11:00 |  Cloudy | 35 °C | 6% | 75% | 38% | 758 mm Hg | WSW 246° 9.5 (12.19) m/s | 11.1 |
| 12:00 | Overcast | 36 °C | 10% | 100% | 36% | 757 mm Hg | WSW 247° 9.81 (12.72) m/s | 12.1 |
| 13:00 | Cloudy | 36 °C | 7% | 85% | 35% | 756 mm Hg | WSW 248° 9.69 (12.33) m/s | 11.1 |
| 14:00 | Overcast | 36 °C | 9% | 100% | 35% | 755 mm Hg | WSW 248° 10.19 (12.5) m/s | 8.6 |
| 15:00 | Cloudy | 35 °C | 6% | 77% | 36% | 755 mm Hg | WSW 250° 9.89 (12) m/s | 5.2 |
| 16:00 | Overcast | 34 °C | 10% | 100% | 39% | 755 mm Hg | WSW 249° 9.61 (11.72) m/s | 2.4 |
| 17:00 | Overcast | 33 °C | 10% | 99% | 44% | 755 mm Hg | WSW 246° 8.61 (10.61) m/s | 0.7 |
| 18:00 |  Sunny | 31 °C | 2% | 10% | 50% | 756 mm Hg | WSW 248° 7.31 (9.53) m/s | 0 |
| 19:00 | Overcast | 30 °C | 13% | 96% | 58% | 757 mm Hg | WSW 248° 6.69 (10.03) m/s | 0 |
| 20:00 |  Partly cloudy | 28 °C | 8% | 57% | 63% | 758 mm Hg | WSW 244° 6.19 (11.31) m/s | 0 |
| 21:00 |  Cloudy | 28 °C | 11% | 66% | 68% | 758 mm Hg | WSW 244° 5.31 (11.31) m/s | 0 |
| 22:00 | Overcast | 27 °C | 16% | 88% | 71% | 758 mm Hg | WSW 243° 4.89 (11.72) m/s | 0 |
| 23:00 | Overcast | 27 °C | 19% | 100% | 72% | 758 mm Hg | WSW 239° 4.61 (11.42) m/s | 0 |
Fri, Aug 21, 2026
Frequently asked questions about the 5-day weather in Phnom Penh
What will the weather be like in Phnom Penh over the next 5 days?
Over the next 5 days in Phnom Penh the temperature is expected to range from about 25 to 36 °C. See the detailed hourly forecast for each of the 5 days in the charts above.
On which of the next 5 days will it rain in Phnom Penh?
The chance of rain in Phnom Penh over the next 5 days reaches 21%. Check the 5-day precipitation chart above to see exactly which days and hours bring rain.
How accurate is the 5-day weather forecast for Phnom Penh?
A 5-day forecast is fairly reliable: the first 2–3 days are usually very accurate, while days 4–5 may be refined. The data is updated several times a day, so check back before important plans.
Which of the next 5 days in Phnom Penh will be the warmest and which the coolest?
Over the next 5 days the temperature in Phnom Penh ranges from about 25 to 36 °C. Compare the warmest and coolest day on the temperature chart above.
Will it be windy in Phnom Penh over the next 5 days?
Over the next 5 days the wind in Phnom Penh picks up to 11 m/s. The windiest days are easy to spot on the wind chart above.
Which day of the week in Phnom Penh is best for a walk or a trip?
For a walk or a trip, pick the days with the lowest chance of rain (up to 21%) and light wind — easy to compare on the 5-day charts above.
How can I best use the 5-day forecast for Phnom Penh?
The first 2–3 days are reliable enough for firm decisions, while days 4–5 are a guide that sharpens as they approach. The forecast is updated several times a day, so check again before important plans.
Phnom Penh on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.