Port Blair climate — normals and trends
Port Blair (India) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 27.0 °C and it receives 2,379 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (28.0 °C on average) and the coldest is January (26.1 °C). Rainfall peaks in June.
Port Blair averages 0 frost days, 2 hot days (≥ 30 °C) and 218 rainy days per year.
Port Blair has warmed by +1.0 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.2 °C (on 7 May 1998) and the coldest 22.5 °C (on 29 December 1952).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Port BlairAndaman and Nicobar
- coords
- 11.67°, 92.75°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.0°C
Average daily high
27.7°C
Average daily low
26.2°C
Annual rainfall
2,379mm
Sunshine / day
9.8h
Mean relative humidity
81%
Average peak wind
25.3km/h
Seasonal range
1.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
218 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.4 °C
Average feels-like low
28.7 °C
Average peak gust
35.3 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
18.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.74 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
31.2 °C
7 May 1998
Coldest day
22.5 °C
29 December 1952
Wettest day
157 mm
22 October 1967
Windiest day
75.2 km/h
17 May 1997
Strongest gust
109.8 km/h
17 May 1997
Hottest feels-like
40.2 °C
29 April 2024
Coldest feels-like
21.8 °C
21 January 1993
Sunniest day
12.4 h
24 May 1951
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 27.6 °C | +0.8 °C | 51 mm | +3 mm |
| Feb | 27.8 °C | +0.6 °C | 52 mm | +29 mm |
| Mar | 28.8 °C | +0.9 °C | 15 mm | -12 mm |
| Apr | 28.8 °C | +0.1 °C | 213 mm | +137 mm |
| May | 29.1 °C | +0.4 °C | 385 mm | +95 mm |
| Jun | 28.5 °C | +0.2 °C | 322 mm | -24 mm |
| Jul | 28.4 °C | +0.5 °C | 208 mm | -90 mm |
| Aug | 28.1 °C | +0.3 °C | 249 mm | -59 mm |
| Sep | 27.7 °C | +0.2 °C | 509 mm | +184 mm |
| Oct | 27.8 °C | +0.4 °C | 280 mm | -1 mm |
| Nov | 28.0 °C | +0.5 °C | 128 mm | -95 mm |
| Dec | 27.5 °C | +0.3 °C | 73 mm | -60 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Port Blair?
Port Blair has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 27.0 °C and it receives 2,379 mm of precipitation per year.
What is the hottest day ever recorded in Port Blair?
The hottest day measured in Port Blair between 1940 and 2025 was 7 May 1998, reaching 31.2 °C.
What is the coldest day in Port Blair?
The coldest day measured in Port Blair between 1940 and 2025 was 29 December 1952, at 22.5 °C.
Does it snow in Port Blair?
Almost never: Port Blair sees virtually no snow, with about 0 frost days per year.
Has the climate of Port Blair warmed?
Yes: Port Blair warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Port Blair?
The wettest day measured in Port Blair between 1940 and 2025 was 22 October 1967, with 157 mm of rain in 24 hours.
What was the windiest day in Port Blair?
The windiest day measured in Port Blair between 1940 and 2025 was 17 May 1997, with winds reaching 75.2 km/h.
What is the warmest month in Port Blair?
The warmest month in Port Blair is April (28.0 °C on average); the coldest is January (26.1 °C).
How much does it rain in Port Blair?
Port Blair receives on average 2,379 mm of precipitation per year, spread over about 218 rainy days.
Is it sunny in Port Blair?
Port Blair gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.
Are there tropical nights in Port Blair?
Yes: Port Blair has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Port Blair?
In Port Blair, between 1940 and 2025, the highest apparent temperature reached 40.2 °C on 29 April 2024, and the lowest was 21.8 °C on 21 January 1993.
Compare Port Blair with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Port Blair