Climate Information of Ranichauri 

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       The center receives an average annual rainfall of 1245 mm in 72 rainy days. The rainy season starts during 2nd week of July and ends in 2nd week of November with duration of 17 weeks. The average monsoon seasonal rainfall (June to September) is 775 mm and can vary from 353 mm to 1063 mm. Peak rainfall occurs during 1st week of August. Daytime temperature varies from 10.9° C (2nd week of January) to 26.2° C (3rd week of May), while the nighttime temperature varies from 2.2° C (2nd week of January) to 17.1° C (last week of July).

 

Average Weekly Weather Data 

WEEK MAXT (°C)  MINT (°C)  RH-I   (%)  RH-II (%)  WS (kmph)  RF (mm/week)  SSH   (hrs)  EVP (mm/week)
1 11.5 2.6 67 58 5.6 10.4 4.2 7.3
2 10.9 2.2 64 58 6.0 16.5 3.7 7.3
3 11.1 2.3 67 61 6.5 14.6 4.0 8.7
4 12.4 2.9 64 54 6.8 7.5 4.4 10.5
5 12.7 3.2 66 57 6.4 15.6 4.2 10.7
6 12.7 3.0 66 59 7.3 28.1 4.5 11.0
7 12.7 3.3 68 55 6.5 21.6 4.6 10.3
8 13.0 3.1 67 54 6.1 29.6 4.9 10.5
9 14.5 4.4 64 56 6.5 24.7 4.8 13.1
10 16.5 6.1 60 45 6.8 14.1 5.7 15.2
11 17.3 6.3 59 47 6.6 20.4 5.2 15.5
12 17.6 7.0 60 49 6.5 21.6 4.8 15.5
13 19.1 8.1 58 47 6.3 19.9 5.5 18.2
14 20.4 9.2 51 40 7.2 10.6 6.2 20.9
15 22.0 10.3 48 40 8.2 13.8 6.4 23.0
16 23.5 11.4 47 41 7.3 5.9 6.9 26.5
17 24.0 12.3 50 43 7.7 17.9 7.0 27.0
18 24.5 12.8 51 42 8.1 15.2 6.9 29.0
19 24.5 13.3 55 46 8.6 24.2 6.9 29.6
20 25.2 14.1 54 47 8.9 17.1 7.1 29.4
21 25.9 14.5 55 48 8.1 15.1 7.1 30.3
22 26.2 14.9 56 48 7.9 15.2 6.9 29.6
23 25.9 15.1 57 54 8.1 31.7 6.0 30.7
24 25.4 15.9 66 65 9.5 25.9 5.4 28.9
25 24.8 16.4 74 73 9.1 27.3 4.9 26.4
26 24.1 16.9 79 77 9.1 30.1 4.3 24.7
27 23.8 17.0 81 78 7.6 38.2 3.9 24.7
28 23.3 16.7 87 83 7.5 65.9 3.6 19.4
29 23.0 17.0 89 87 8.4 68.5 2.8 18.4
30 22.8 17.1 89 84 7.0 55.5 3.0 16.3
31 22.8 16.9 89 86 7.7 70.9 3.2 18.3
32 22.9 17.1 90 86 6.4 55.4 2.9 16.5
33 22.5 16.8 89 87 5.8 69.6 3.0 16.3
34 22.3 16.7 89 85 6.3 57.8 2.7 15.4
35 22.3 16.3 88 83 7.0 44.5 3.0 15.8
36 22.2 15.7 89 86 6.8 55.1 3.4 15.8
37 21.9 15.1 88 83 5.9 39.1 3.7 14.5
38 22.1 14.6 85 79 7.2 16.2 5.2 14.7
39 21.8 13.7 83 74 6.9 16.4 5.9 15.4
40 21.6 12.7 79 69 7.6 6.0 6.2 18.9
41 21.3 11.5 73 61 7.5 12.7 6.5 16.0
42 20.3 9.9 67 57 7.2 24.3 6.3 16.7
43 19.4 9.2 67 55 7.8 0.2 6.3 15.0
44 19.2 8.8 65 52 7.2 2.1 6.3 13.8
45 18.0 7.5 65 54 7.4 4.3 5.7 12.0
46 17.8 7.3 64 56 7.6 1.0 5.9 11.9
47 16.1 6.1 65 54 7.1 6.3 5.1 11.0
48 15.4 5.1 65 56 6.5 5.0 5.2 9.9
49 15.1 5.1 64 55 6.8 1.0 5.1 10.0
50 13.7 4.1 63 54 5.6 8.7 4.7 9.7
51 13.3 3.7 64 56 6.4 10.2 4.5 8.7
52 11.9 2.8 69 60 6.1 18.5 4.4 8.2

 

    Rainfall Statistics (Database 1985-2002)

Monthly and Annual Rainfall Normals (mm)

Parameter

 Jan Feb Mar Apr May June Jul Aug Sep Oct Nov Dec

Annual

Average

 59.9 92.9 83.9 49.2 79.8 118.5 253 264.9 138.5 44 16.2 43.7 1244.6 

Lowest

0 13 2 0 9 26 24.0  55 6 0 0 0  689.0

Highest

 127 230 185 186 202 264 471 429 383 332 88 191  1837.0

SD

 36.7 63.3 58.3 42.8 49.8 63.2 121.8 91.1 89.8 88.2 30.2 58.2 287.2 

CV (%)

 61.3 68.1 69.5 87 62.4 53.4 48.2 34.4 64.8 200.4 186 133.1 23.1 

Seasonal Rainfall Normals (mm)

 Parameter  

SW MONSOON (Jun-Sep)

NE MONSOON (Oct-Dec)

WINTER (Jan-Feb)

HOT WEATHER (Mar-May)

Average

 774.9  103.9  152.8  212.9 

Lowest

 353.0  0.0 61 69

Highest

  1063.0  341.0 335.0  370.0 

SD

  198.7 117.2  73.5  85.7 

CV (%)

  25.6 112.8  48.1  40.3 

Normal Rainy Days

 Parameter  

SW MONSOON (Jun-Sep)

NE MONSOON (Oct-Dec)

WINTER (Jan-Feb)

HOT WEATHER (Mar-May)

ANNUAL (Jan-Dec)

Average

 43 4 8.8 15 72 

Lowest

 29 0 3 7 53

Highest

 56  13 14 22 85

SD

 7.4  3.7 3 4.9 9.9 

CV

 17.3  93.6 34.4 32.7 13.7 

 

Weekly Rainfall Probability (%) for different amounts

WEEK Upto 10mm 20mm 30mm 40mm 50mm 75mm 100mm >100mm
1 33 22 22 22 11 5 0 0
2 55 44 38 27 22 5 5 0
3 44 33 27 16 16 16 0 0
4 38 27 16 5 5 0 0 0
5 50 33 22 11 5 5 5 0
6 61 55 38 38 33 16 11 11
7 83 55 38 22 16 16 0 0
8 77 72 55 38 16 16 5 5
9 44 44 38 27 27 22 5 5
10 55 33 22 16 16 11 0 0
11 72 50 38 27 22 11 11 0
12 72 61 38 27 22 16 11 5
13 66 50 33 22 16 11 0 0
14 44 22 11 11 11 11 0 0
15 55 44 22 22 16 11 0 0
16 38 16 11 5 5 5 0 0
17 55 44 33 27 22 5 0 0
18 66 38 27 16 11 5 5 0
19 72 66 50 27 22 11 5 5
20 66 55 38 16 11 5 5 0
21 83 44 27 11 11 5 5 0
22 77 61 33 16 11 0 0 0
23 72 50 38 33 16 16 11 11
24 83 72 27 16 16 11 11 11
25 88 61 44 33 27 16 11 0
26 88 72 66 55 22 16 0 0
27 88 72 66 38 38 33 16 16
28 100 94 83 77 66 50 22 16
29 100 88 77 61 61 44 44 33
30 88 88 88 77 66 61 22 5
31 88 88 88 83 72 55 50 22
32 100 83 83 66 55 50 27 16
33 100 94 83 66 61 55 38 27
34 100 100 88 77 61 50 33 11
35 88 77 61 61 50 22 16 11
36 77 72 61 55 38 33 22 22
37 88 66 66 55 44 27 16 11
38 44 27 27 22 22 16 0 0
39 55 22 22 22 16 16 11 5
40 27 22 11 5 5 5 0 0
41 22 11 5 5 5 5 5 5
42 27 22 11 11 11 11 5 5
43 5 5 0 0 0 0 0 0
44 16 11 0 0 0 0 0 0
45 22 11 11 5 0 0 0 0
46 5 5 0 0 0 0 0 0
47 22 11 11 11 11 11 0 0
48 11 11 11 5 5 5 0 0
49 11 5 0 0 0 0 0 0
50 22 22 11 11 11 5 5 0
51 33 27 5 5 5 5 5 5
52 33 27 27 27 22 11 11 5

 

Weekly Rainfall values at different Probability levels

 WEEK

PRECIPITATION (mm) FOR THE PROBABILITIES(%)
90 75 50 25 10
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 Crop Season Rainfall Characteristics

Mean start, end, duration and rainfall during the season

 MEAN START = 28*

As Early As = 27*

As Late As = 31*

 STD.DEV = 1.3

 MEAN END = 46*

As Early As = 37*

As Late As = 52*

STD.DEV = 5.9

 MEAN DUR = 16*

MIN DUR = 10*

MAX DUR = 25*

STD.DEV = 6.1

MEAN CSR** = 736mm

MIN CSR** = 276mm

MAX CSR** = 1164mm

STD.DEV = 239.2mm

                    * Standard Meteorological Week          

                    ** Crop Seasonal Rainfall (CSR)

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