Calcutta weather in August

In August, Calcutta sees average daytime highs of 25°C and overnight lows near 12°C, with 16 mm of rain across 3.3 wet days and about 11.1 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 72% of the time in August, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of August to 11 h 30 min by month's end. Set against the rest of the year, August is Calcutta's 4th-clearest and 4th-windiest month. For the whole year in context, see Calcutta's year-round climate.

Daytime high
25°
10th warmest
Overnight low
12°
3rd coldest
Rainfall
16 mm
3.3 wet days
Daylight
11 h 06 min
6:26 AM – 5:33 PM
Cloud cover
26%
4th clearest
Wind
9 km/h
4th windiest
Solar energy
4.47 kWh/m²
Travel score
8.6
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 26°C by the end.

A typical August day in Calcutta reaches about 25°C in the afternoon and slips back to 12°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 31°C. Set against its neighbours, August runs about 2°C warmer than July and about 2°C cooler than September.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12411
22411
32411
42411
52411
62411
72511
82511
92512
102512
112512
122512
132512
142512
152512
162512
172512
182512
192512
202512
212513
222613
232613
242613
252613
262613
272613
282613
292613
302613
312614

Calcutta weather by month

How August compares with the rest of the year at a glance. August is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°14014.713.44.8
Feb29° / 20°12113.212.94.9
Mar29° / 19°9011.812.25.7
Apr27° / 17°467.611.47.2
May26° / 13°15310.88.5
Jun24° / 11°8210.59.1
Jul24° / 10°112.310.68.9
Aug25° / 12°163.311.18.6
Sep27° / 15°305.311.87.6
Oct27° / 17°569.812.66.5
Nov28° / 18°10412.813.25.4
Dec29° / 19°13215.113.54.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 72% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 10% of August, with mostly cloudy or overcast conditions the remaining 18%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18416
28416
38416
48416
58317
68317
78317
88317
98317
108317
118317
128218
138218
148119
158119
168119
178020
188020
198020
208020
218020
228020
238119
248119
258119
268119
278119
288119
298020
308119
318119

Chance of precipitation in August

Any precipitation

Calcutta gets around 16 mm of rain over 3.3 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 11% and peaks near 11% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
110
210
310
410
510
610
710
810
911
1011
1111
1211
1311
1411
1511
1611
1711
1811
1911
2011
2111
2211
2311
2411
2511
2610
2710
2810
2910
3010
3111

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19550
29550
39550
49460
59460
69460
79370
89370
99280
109280
119280
129190
139190
1490100
1590100
1689110
1788120
1888120
1987130
2087130
2186140
2286140
2385150
2485150
2585150
2684160
2783161
2882171
2982171
3082171
3181181

Wind in August

Winds average 9 km/h in August.

Across August, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 48 min at the start of August to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over August. Sunrise moves from 6:36 AM to 6:11 AM, and sunset from 5:26 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.86:365:26
210.86:365:26
310.96:355:27
410.96:355:27
510.96:345:28
610.96:335:28
710.96:335:29
811.06:325:29
911.06:315:30
1011.06:305:30
1111.06:305:31
1211.06:295:31
1311.16:285:31
1411.16:275:32
1511.16:265:32
1611.16:265:33
1711.16:255:33
1811.26:245:34
1911.26:235:34
2011.26:225:34
2111.26:215:35
2211.36:205:35
2311.36:195:36
2411.36:185:36
2511.36:175:37
2611.36:165:37
2711.46:155:37
2811.46:145:38
2911.46:135:38
3011.46:125:39
3111.56:115:39

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.47 kWh/m².

For context, solar energy here swings from a low near 3.69 kWh/m² to a high of 5.77 kWh/m² in January across the year — August's 4.47 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.6Bright
214.6Bright
224.6Bright
234.7Bright
244.7Bright
254.7Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.9Bright
314.9Bright
Planning a trip in August

Hazard calendar for Calcutta

In seasonPeak

None of Calcutta's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Calcutta's rainy season runs November–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Calcutta?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.6
Sightseeing
3rd-best month of the year
7.7
Beach & pool
3rd-best month of the year

August is one of the better times to visit Calcutta for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Calcutta in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Calcutta sees daytime highs around 25°C and nights near 12°C. Worth packing: light clothes. About 3 days see rain.

light clothes

UV index in Calcutta in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Calcutta peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 5 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighHighVery highExtremeJan 20UV 14Jun 21UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar12Extreme
Apr8Very high
May6High
Jun5Moderate
Jul5High
Aug7High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec13Extreme

Air quality in Calcutta in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Calcutta is worst in July — around 32 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (January, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 1832 µg/m³Jan 1612 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar17Moderate
Apr23Moderate
May31Moderate
Jun30Moderate
Jul32Moderate
Aug30Moderate
Sep26Moderate
Oct19Moderate
Nov18Moderate
Dec13Moderate
Location & terrain

Where is Calcutta?

Calcutta sits at 25.0°S, 31.2°E, 435 m above sea level, in South Africa. The nearest listed city is Mkhuhlu, 1.0 km away.

Topography around Calcutta

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Calcutta.

Within 3 km, the terrain around Calcutta has only modest variations in elevation — a maximum elevation change of 118 m around an average of 432 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 526 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,118 m.

The land around Calcutta is covered by artificial surfaces (36%) and grassland (32%) within 3 km, grassland (49%) and trees (22%) within 16 km, and grassland (46%), trees (27%) and shrubs (22%) within 80 km.

3 km
118 m
16 km
526 m
80 km
2,118 m
treesshrubsgrasslandcroplandartificial surfaces
August weather nearby: Mkhuhlu 1.0 km · Hlanganani 7.0 km · Dwarsloop 25 km · Mafemani 27 km · Thulamahashi 29 km · White River 45 km · Acornhoek 46 km · Sabie 48 km

South Africa travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / M / N
230 V · 50 Hz
Prices
≈ 41% of US
price level, 2025
GDP per capita
$6,598
2025
Happiness
5.0 / 10
World Happiness, 2025
Safe drinking water
68%
of population, 2024
Homicide rate
43.7
per 100k, 2022
Road deaths
22.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very high
EF EPI 602
Religion
Christian 86%or other traditional African religions 5%nothing in particular 5%Muslim 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Calcutta (-24.9832°, 31.2349°, elevation 435 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).