Climate data for Kolkata (Alipore) 1991–2020, extremes 1901–present
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 32.8
(91.0) 		38.4
(101.1) 		41.1
(106.0) 		43.3
(109.9) 		43.7
(110.7) 		43.9
(111.0) 		39.9
(103.8) 		38.4
(101.1) 		38.9
(102.0) 		39.0
(102.2) 		34.9
(94.8) 		32.5
(90.5) 		43.9
(111.0)
Mean maximum °C (°F) 29.8
(85.6) 		33.9
(93.0) 		37.5
(99.5) 		38.8
(101.8) 		39.0
(102.2) 		37.8
(100.0) 		36.0
(96.8) 		35.3
(95.5) 		35.5
(95.9) 		35.3
(95.5) 		33.1
(91.6) 		30.0
(86.0) 		39.8
(103.6)
Mean daily maximum °C (°F) 25.5
(77.9) 		29.4
(84.9) 		33.7
(92.7) 		35.4
(95.7) 		35.5
(95.9) 		34.1
(93.4) 		32.5
(90.5) 		32.3
(90.1) 		32.6
(90.7) 		32.3
(90.1) 		30.2
(86.4) 		26.7
(80.1) 		31.7
(89.1)
Daily mean °C (°F) 19.9
(67.8) 		23.8
(74.8) 		28.2
(82.8) 		30.6
(87.1) 		31.2
(88.2) 		30.6
(87.1) 		29.5
(85.1) 		29.4
(84.9) 		29.4
(84.9) 		28.3
(82.9) 		25.1
(77.2) 		21.1
(70.0) 		27.3
(81.1)
Mean daily minimum °C (°F) 14.3
(57.7) 		18.1
(64.6) 		22.9
(73.2) 		25.7
(78.3) 		26.8
(80.2) 		27.1
(80.8) 		26.7
(80.1) 		26.6
(79.9) 		26.3
(79.3) 		24.4
(75.9) 		20.1
(68.2) 		15.5
(59.9) 		22.9
(73.2)
Mean minimum °C (°F) 10.9
(51.6) 		12.4
(54.3) 		18.2
(64.8) 		21.1
(70.0) 		21.8
(71.2) 		23.9
(75.0) 		24.3
(75.7) 		24.6
(76.3) 		23.9
(75.0) 		20.9
(69.6) 		16.9
(62.4) 		11.9
(53.4) 		10.0
(50.0)
Record low °C (°F) 6.7
(44.1) 		7.2
(45.0) 		10.0
(50.0) 		16.1
(61.0) 		17.9
(64.2) 		20.4
(68.7) 		20.6
(69.1) 		22.6
(72.7) 		20.6
(69.1) 		17.2
(63.0) 		10.6
(51.1) 		7.2
(45.0) 		6.7
(44.1)
Average rainfall mm (inches) 15.4
(0.61) 		24.6
(0.97) 		36.8
(1.45) 		55.0
(2.17) 		118.5
(4.67) 		276.7
(10.89) 		371.6
(14.63) 		372.1
(14.65) 		325.0
(12.80) 		179.6
(7.07) 		32.6
(1.28) 		5.6
(0.22) 		1,813.3
(71.39)
Average rainy days 1.1 1.5 2.1 3.2 6.2 12.6 17.5 16.8 13.6 7.4 1.4 0.7 84.2
Average relative humidity (%) (at 17:30 IST) 62 55 51 61 68 77 82 83 82 76 68 65 69
Mean monthly sunshine hours 213.9 211.9 229.4 240.0 232.5 135.0 105.4 117.8 126.0 201.5 216.0 204.6 2,234
Mean daily sunshine hours 6.9 7.5 7.4 8.0 7.5 4.5 3.4 3.8 4.2 6.5 7.2 6.6 6.1
Average ultraviolet index 7 9 11 12 12 12 12 12 11 9 7 6 10
Source 1: India Meteorological Department (sun 1971–2000)[1][2][3][4] Weather Atlas[5]
Source 2: Tokyo Climate Center (mean temperatures 1991–2020)[6] [7]
Climate data for Kolkata (Dumdum Airport) 1981–2007, extremes 1939–2012
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 32.5
(90.5) 		37.3
(99.1) 		40.6
(105.1) 		42.8
(109.0) 		43.1
(109.6) 		43.7
(110.7) 		39.2
(102.6) 		37.7
(99.9) 		36.8
(98.2) 		36.8
(98.2) 		36.0
(96.8) 		33.0
(91.4) 		43.7
(110.7)
Mean daily maximum °C (°F) 25.6
(78.1) 		29.0
(84.2) 		33.3
(91.9) 		35.5
(95.9) 		35.6
(96.1) 		34.3
(93.7) 		32.9
(91.2) 		32.7
(90.9) 		32.8
(91.0) 		32.2
(90.0) 		29.9
(85.8) 		26.8
(80.2) 		31.7
(89.1)
Mean daily minimum °C (°F) 12.9
(55.2) 		16.6
(61.9) 		21.3
(70.3) 		24.7
(76.5) 		25.9
(78.6) 		26.5
(79.7) 		26.3
(79.3) 		26.4
(79.5) 		25.9
(78.6) 		23.8
(74.8) 		19.0
(66.2) 		14.0
(57.2) 		21.9
(71.4)
Record low °C (°F) 5.0
(41.0) 		6.1
(43.0) 		12.1
(53.8) 		16.6
(61.9) 		17.6
(63.7) 		19.2
(66.6) 		20.1
(68.2) 		21.1
(70.0) 		21.7
(71.1) 		15.7
(60.3) 		11.7
(53.1) 		6.1
(43.0) 		5.0
(41.0)
Average rainfall mm (inches) 15.8
(0.62) 		20.2
(0.80) 		31.9
(1.26) 		53.4
(2.10) 		140.5
(5.53) 		247.5
(9.74) 		366.5
(14.43) 		355.4
(13.99) 		282.1
(11.11) 		170.2
(6.70) 		21.3
(0.84) 		6.8
(0.27) 		1,711.6
(67.39)
Average rainy days 1.1 1.4 2.3 3.5 6.6 12.4 17.6 17.1 13.0 7.1 1.1 0.7 83.9
Average relative humidity (%) (at 08:30 IST) 75 71 67 71 73 79 83 83 81 75 70 72 75
Source: India Meteorological Department[8][9][10]

References

These references will appear in the article, but this list appears only on this page.
  1. ^ "Station: Calcutta (Alipur) Climatological Table 1981–2010" (PDF). Climatological Normals 1981–2010. India Meteorological Department. January 2015. pp. 161–162. Archived from the original (PDF) on 5 February 2020. Retrieved 2 March 2020.
  2. ^ "Extremes of Temperature & Rainfall for Indian Stations (Up to 2012)" (PDF). India Meteorological Department. December 2016. p. M237. Archived from the original (PDF) on 5 February 2020. Retrieved 2 March 2020.
  3. ^ "Table 3 Monthly mean duration of Sun Shine (hours) at different locations in India" (PDF). Daily Normals of Global & Diffuse Radiation (1971–2000). India Meteorological Department. December 2016. p. M-3. Archived from the original (PDF) on 5 February 2020. Retrieved 2 March 2020.
  4. ^ "Kolkata (Alipore) (42807)". India Meteorological Department. Retrieved 10 September 2022.
  5. ^ "Climate and monthly weather forecast Kolkata, India". Weather Atlas. Retrieved 17 June 2022.
  6. ^ "Normals Data: Kolkata/Alipore - India Latitude: 22.53°N Longitude: 88.33°E Height: 6 (m)". Japan Meteorological Agency. Archived from the original on 2 March 2020. Retrieved 2 March 2020.
  7. ^ "Climatological Tables 1991-2020" (PDF). India Meteorological Department. p. 21. Archived from the original (PDF) on 1 January 2023. Retrieved 1 January 2023.
  8. ^ "Station: Calcutta (Dumdum) Climatological Table 1981–2010" (PDF). Climatological Normals 1981–2010. India Meteorological Department. January 2015. Archived from the original (PDF) on 5 February 2020. Retrieved 10 January 2021.
  9. ^ "Extremes of Temperature & Rainfall for Indian Stations (Up to 2012)" (PDF). India Meteorological Department. December 2016. Archived from the original (PDF) on February 5, 2020. Retrieved 10 January 2021.
  10. ^ "Kolkata (Dum Dum) (42809)". India Meteorological Department. Retrieved 10 September 2022.
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