Weather Tbong Khmum Today – Temperature, Rain & Hourly Forecast
Monday, 21/09/2026
27°
Light drizzle · Feels like 31°
Updated 9 hours ago
- High/Low
- 30°/24°
- Humidity
- 85%
- Wind
- 10 km/h
- Rainfall
- 19.1 mm
- UV index
- 8.5
- Pressure
- 1013 hPa
- Sunrise
- 05:46
- Sunset
- 17:54
Today
00
06
12
18
00:0006:0012:0018:00
Summary
Tbong Khmum gets a cooler-than-usual day, 24–30°C, skies are moderate showers.
Rain concentrates around 00:00–00:00 with about 18.5 mm — worth taking an umbrella.
Maximum UV of 8.5 at 13:00 — stay out of the sun between 10am and 3pm and use sunscreen.
Humidity of 85% pushes the felt temperature to 31°C.
Wind runs 13 km/h out of the north-west.
Temperatures ease off, bottoming out at 24°C on Thursday 24/09.
The wettest day ahead is Thursday 24/09 with about 31 mm.
Sunrise 05:46, sunset 17:54.
Best time to visit
Outdoor heat stress
25°C
Peaks at 18:00 — safe
Dry riding window
–
No dry window of 2+ hours in the next 14 hours
Drying laundry
Workable
0 sunny hours, 0 wet hours between 07:00 and 17:00
Sunrise viewing
05:46
100% cloud at sunrise — thick cloud, poor visibility
Skin protection
8.5
Unprotected skin may burn in about 15 minutes
48-hour forecast
18:00
25°
96%
19:00
25°
96%
20:00
25°
92%
21:00
25°
87%
22:00
25°
82%
23:00
25°
79%
00:00
25°
77%
01:00
24°
75%
02:00
24°
75%
03:00
24°
75%
04:00
24°
75%
05:00
24°
72%
06:00
24°
68%
07:00
24°
65%
08:00
25°
66%
09:00
26°
68%
10:00
27°
71%
11:00
28°
74%
12:00
29°
78%
13:00
30°
82%
14:00
30°
87%
15:00
30°
94%
16:00
27°
98%
17:00
26°
100%
18:00
25°
100%
19:00
25°
100%
20:00
25°
100%
21:00
25°
99%
22:00
25°
96%
23:00
25°
89%
00:00
24°
80%
01:00
25°
73%
02:00
25°
69%
03:00
24°
67%
04:00
24°
65%
05:00
24°
61%
06:00
24°
56%
07:00
24°
55%
08:00
25°
60%
09:00
26°
68%
10:00
27°
76%
11:00
28°
84%
12:00
29°
92%
13:00
28°
98%
14:00
29°
100%
15:00
26°
100%
16:00
26°
100%
17:00
25°
100%
Days ahead
| Today | Low/High | Chance of rain | Rainfall | |
|---|---|---|---|---|
| Today 21/09 | Moderate showers | 24°30° | 100% | 19.1 mm |
| Tomorrow 22/09 | Thunderstorm | 24°30° | 100% | 31.0 mm |
| Wednesday 23/09 | Thunderstorm | 24°29° | 100% | 26.7 mm |
| Thursday 24/09 | Thunderstorm | 24°28° | 100% | 31.4 mm |
| Friday 25/09 | Thunderstorm | 24°29° | 97% | 13.7 mm |
Monthly averages
Common questions
Will it rain in Tbong Khmum today?
Yes. Rain is expected around 00:00–00:00, totalling roughly 18.5 mm.
How hot is it in Tbong Khmum today?
Between 24°C and 30°C, with a felt maximum of 37°C.
What is the weather in Tbong Khmum tomorrow?
Tomorrow: thunderstorm, 24–30°C, with a 100% chance of rain.
Upstream rainfall · Mekong
- Past 72 hours
- 39 mm
- Next 72 hours
- 30 mm
- Status
- Slightly elevated
- Water may arrive
- 23/09
| Upstream sampling points | Past 72 hours | Next 72 hours |
|---|---|---|
| Luang Prabang, Laos | 48 mm | 2 mm |
| Vientiane, Laos | 34 mm | 27 mm |
| Savannakhet, Laos | 29 mm | 13 mm |
| Pakse, Laos | 41 mm | 42 mm |
| Nakhon Phanom, TH | 24 mm | 11 mm |
| Ubon Ratchathani, TH | 60 mm | 83 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