Today
4 Nov
31° 25°
78%4.4 mm
62%
9 weather models · one stack
Chennai weather
Tamil Nadu, India
13.11°, 80.25° · 15 m
Local time 06:45
Confidence 62%
Chennai weather today: 9 models agree with medium confidence on a high of 31°C and a low of 25°C. Rain expected: 78% of models agree, about 4.4 mm. Tomorrow: 30°C. Rain expected: 78% of models agree, about 4.2 mm.
The stack
Each row is one weather model, each cell one hour. Same colour across rows = the models agree. Tap a model to hide it; hover for exact values.
16-day consensus
Each coloured line is one model's low→high; the dots are their highs. A tight cluster means a confident forecast.
Thu
5 Nov
30° 26°
78%4.2 mm
60%
Fri
6 Nov
29° 26°
89%7.2 mm
74%
Sat
7 Nov
29° 26°
100%9.0 mm
76%
Sun
8 Nov
30° 26°
75%5.5 mm
55%
Mon
9 Nov
30° 26°
43%0.0 mm
42%
Tue
10 Nov
30° 26°
43%0.6 mm
49%
Wed
11 Nov
29° 26°
100%3.3 mm
84%
Thu
12 Nov
29° 26°
80%2.4 mm
65%
Fri
13 Nov
30° 26°
40%0.9 mm
49%
Sat
14 Nov
29° 25°
75%2.1 mm
61%
Sun
15 Nov
28° 25°
100%9.6 mm
85%
Mon
16 Nov
27° 25°
100%13 mm
88%
Tue
17 Nov
29° 25°
100%10 mm
87%
Wed
18 Nov
29° 24°
33%0.9 mm
51%
Thu
19 Nov
31° 24°
0%0.9 mm
70%
Model spaghetti
Every model as a line, the bold line is the median, the shaded band the full model range. Rain shows accumulated totals from now.
Model maps around Chennai
ECMWF and GFS rain forecasts over Chennai on synced maps. Drag the divider or press play.
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What each model says for Chennai
Daily high/low and rain total per model. Blue = at least 1 mm.
| Model | Today | Thu 5 | Fri 6 | Sat 7 | Sun 8 | Mon 9 | Tue 10 |
|---|---|---|---|---|---|---|---|
| Consensus | 31°/25° · 4.4 mm | 30°/26° · 4.2 mm | 29°/26° · 7.2 mm | 29°/26° · 9.0 mm | 30°/26° · 5.5 mm | 30°/26° · 0.0 mm | 30°/26° · 0.6 mm |
| ECMWF | 30°/25° · 5.9 mm | 29°/25° · 0.6 mm | 29°/25° · 5.9 mm | 29°/25° · 9.0 mm | 28°/25° · 6.6 mm | 29°/24° · 2.4 mm | 29°/24° · 1.2 mm |
| AIFS | 30°/27° · 5.4 mm | 30°/26° · 4.2 mm | 29°/27° · 7.2 mm | 29°/26° · 6.6 mm | 28°/26° · 13 mm | 29°/26° · 9.0 mm | 29°/26° · 6.0 mm |
| GFS | 32°/25° · 4.4 mm | 32°/26° · 4.0 mm | 31°/25° · 3.7 mm | 32°/25° · 2.4 mm | 31°/26° · 4.9 mm | 31°/26° · 0.0 mm | 30°/26° · 0.0 mm |
| ICON | 32°/25° · 4.6 mm | 30°/26° · 4.2 mm | 29°/26° · 7.1 mm | 29°/26° · 7.0 mm | 32°/26° · 0.0 mm | 31°/26° · 0.0 mm | 31°/24° · 0.0 mm |
| GEM | 31°/25° · 1.4 mm | 31°/25° · 0.0 mm | 31°/26° · 0.1 mm | 31°/27° · 16 mm | 31°/27° · 0.9 mm | 31°/27° · 0.0 mm | 30°/27° · 4.8 mm |
| JMA | 28°/28° · 3.6 mm | 28°/27° · 4.2 mm | 28°/27° · 17 mm | 28°/27° · 7.8 mm | 28°/28° · 2.4 mm | 28°/28° · 3.0 mm | 28°/28° · 0.6 mm |
| ARPEGE | 32°/25° · 0.0 mm | 32°/25° · 3.2 mm | 29°/26° · 23 mm | 27°/26° · 25 mm | - | - | - |
| UKMO | 31°/27° · 0.9 mm | 30°/27° · 16 mm | 29°/26° · 51 mm | 28°/26° · 72 mm | 30°/26° · 16 mm | 30°/28° · 0.0 mm | 30°/28° · 0.0 mm |
| CMA | 32°/25° · 4.8 mm | 29°/27° · 22 mm | 30°/26° · 10 mm | 28°/27° · 33 mm | 30°/26° · 6.0 mm | - | - |
Where the models disagree: Monday
Confidence is only 42/100. AIFS brings 9.0 mm of rain while GFS has 0.0 mm; highs range from 28° (JMA) to 31° (GFS). Check back: the next model runs will usually narrow this down.
Chennai weather: questions
Will it rain in Chennai tomorrow?
Rain expected: 78% of models agree, about 4.2 mm. Across 9 weather models the median total is 4.2 mm, ranging from 0.0 mm to 22 mm.
When will it rain next in Chennai?
The next day most models agree on rain is Wednesday 4 November: 78% of models, about 4.4 mm.
What do ECMWF and GFS say for Chennai today?
ECMWF (the European model) forecasts a high of 30°C with 5.9 mm of rain; GFS (the American model) says 32°C with 4.4 mm. The median of all 9 models is 31°C.
Which weather model is most accurate for Chennai?
On average ECMWF scores best in global verification beyond 2–3 days, with the UK Met Office close behind. For the first 48 hours, high-resolution regional models (ICON-D2, AROME, HRRR, UKV) often win locally. The most reliable single number is usually the multi-model consensus shown on this page.
How reliable is the Chennai forecast this week?
The least certain day is Monday (confidence 42/100): AIFS forecasts 9.0 mm of rain while GFS forecasts 0.0 mm.
Nearby forecasts
Model runs fetched at 00:48 UTC. Sources: ECMWF IFS · ECMWF AIFS · NOAA GFS · DWD ICON · Canadian GEM · JMA GSM · Météo-France ARPEGE / AROME · UK Met Office · CMA GRAPES · Methodology